What is SharePoint, WSS and MOSS?

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What is the concept of ghosting and unghosting in SharePoint?

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How can we create site in SharePoint?

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How can we customize a SharePoint site?

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How can you display simple custom page in SharePoint?

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SharePoint Quick Start FAQ - Part 4

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Introduction

This article is the Part 4 of the SharePoint. Please feel free to download my free 500 question and answer videos which covers Design Patter, UML, Function Point, Enterprise Application Blocks, OOP'S, SDLC, .NET, ASP.NET, SQL Server, WCF, WPF, WWF, Sharepoint, LINQ, Silverlight, .Net Best Practices @ http://www.questpond.com/

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What are WebParts and in what ways does it vary in
SharePoint environment?

It helps to build reusable
components which can be customized and personalized according to business user.
We can either make our own webpart or we can reuse the existing one's from
SharePoint itself. Following WebParts are
available with WSS:-Data View Web Part: - Displays data with rich design support through Microsoft SharePoint Designer.List View Web Part: - Helps us to display list content for any list in the SharePoint site.Image Web Part: - Helps us to display image files.Content Editor Web Part: - Use this to display static HTML content using a WYSIWYG editor or to link to a
text file. Members Web Part: - Helps us to display members of the site.Page Viewer Web Part: - Displays web page in an Iframe.WebPart is nothing but a simple class which inherits from System.Web.UI.WebControls.WebParts. In other words you can say WebPart is kind of a WebControl which can be deployed in a
WebPartZoneControl.

WebPart manager control is like controller which maintains instances of Webpart.
It adds WebParts to the WebPartZone when the ASP.NET pages get initialized.

Now let’s try to how
‘WebParts’ work in SharePoint environment. ‘WebPartManager’ uses the ‘SPWebPartManager’.
‘WebPartZone’ interacts with the ‘WebPartManager’ who in-turn stores a
serialized instance of the ‘WebPart’ in the content database. In other words
code is stored in content database for customization.

The big difference is that the ‘WebPart’ code is stored
in content database. So some of the differences as compared to normal ASP.NET is
that, the code is deployed in content database and is parsed using ‘Safe Mode
Parser’.

What are the different life cycle events that
WebPart goes through?

A ‘WebPart’ control goes through various events and has a typical life cycle.
OnInit: - This is the initialization event and is the first event to occur. OnLoad: - The load event.
CreateChildControls: - When any child controls are added to a composite control this event fires.EnsureChildControls: - This event makes sure that ‘CreateChildControls’ fires.OnPreRender: - This fires just before the render event.Page.PreRenderComplete :- When all controls have executed the ‘OnPreRender’ event this event fires. Render: - Render the full control.RenderContents: - Renders the contents of the control only.

What’s the difference between WebParts in WSS 2.0
and 3.0?

Ok, first let’s talk about a bit of history. ‘WebParts’ was born when WSS 2.0 was first introduced. In
ASP.NET 2.0 framework new version of ‘WebPart’ was built which can run with out WSS. WSS 3.0 uses the ASP.NET 2.0 ‘WebPart’ framework.

• So some quick points:- If you are doing new development using WSS 3.0 you should use ASP.NET 2.0 ‘WebPart’ framework.
• If you want backward compatibility you an use ‘Microsoft.SharePoint.WebPartPages.WebPart’ class.So the decision will be more based on what level of back ward compatibility you are looking for. Below sheet shows the new WebPart classes as compared to SharePoint Backward compatible class.

Can you explain the 6 steps we need to create a
WebPart in SharePoint?

Ok, now that we have understood the basics of WebPart lets deploy a WebPart practically. There are verall three steps to deploy WebParts :-

Step 1:- Create the Webpart
The first step is to create the WebPart. rBelow is the code snippet of a webPart. So we need to reference the ‘WebParts’ , the custom webpart class should inherit from ‘WebPart’ class and finally we need to override the ‘CreateChildControls’ method with our custom implementation.

Step 2 :- Copy the compile DLL to the virtual directory in the BIN folder.

The second step is to copy the compiled DLL in the virtual directory of the sharepoint site.You can get the virtual directory from the IIS from home directory tab in IIS. For instance the current website is hosted on the sharepoint 80 virtual site which is actually located at ‘C:\Inetpub\wwwroot\wss\VirtualDirectories\80’.

So now let’s browse to ‘C: \Inetpub\wwwroot\wss\VirtualDirectories\80\bin’ directory and copy the DLL in the bin folder.

Step 3:- Make entry of the WebPart in to web.config file.

Now that we have copied the DLL to ‘bin’ folder , we need to make a ‘SafeControl’ entry in the ‘Web.Config’ file of the virtual directory. So now let’s browse to ‘C:\Inetpub\wwwroot\wss\VirtualDirectories\80’ , open the web.config file and add the class library name in the ‘SafeControls’ section of the web.config file. Below code snippet shows the same in a visual manner.

Step 4:- Add it to the WebPart gallery

Now that we have added the WebPart in the ‘web.config’ file its time to make it available in the web part gallery. So click on Site settings
à
then click webparts
à
Click new button, you should see the figure shown below.You can also see the webpart which you recently added is seen the gallery. To make it available click the check box and click populate gallery.

You should now see your webpart ( for this context it is SimpleLabelWebPart) in the WebPart gallery.

Step 5:- Add the WebPart to site pages.

Ok so now that our WebPart is available in the gallery it’s time to add this WebPart to a SharePoint page. So goto the page where you want to add this WebPart , click on the site action menu and click edit page as shown in the below figure.


On the page you should see a ‘Add a webpart’ button , click on it and it will populate with the existing web parts. Browse to your web part and click add.

Once done your webpart is now added to the site page. You can edit the default webpart properties by clicking on ‘Modify Shared WebPart’. For simplicity sake we have changed the title.

Step 6:- View the WebPart

You can see the changed title display when view the page normally. So with a few lines of coding you can see how we have achieved huge customization.

How can we implement customization and personalization in WebParts?

Personalization and customization is all about improving individual user experience as per personal
choices. Every human is different and everybody wants that the world moves as per their individual choice. Same holds true for websites. For instance your website can have features like weather forecast, business news and sports news. As an admin you have the capability to change the look and feel of the website which gets displayed to all users. Now some individual users would like to only see news and not weather forecast. So the website should provide some kind of functionality where the users can go and personalize their choices so that website behaves according to their choice. Now from the capability where the admin can change the look and feel is called a customization. This change is reflected to every viewer who comes to the site. The capability that individual users can either choose to view the news with weather forecast and not is personalization. Just cutting it short when changes made to site are shared by all users it’s called as customization. When we make changes to some feature which is only shared and seen by individual users is termed as ersonalization.

Let’s try understanding personalization and customization in SharePoint using a small sample. Let’s make a label whose text / data can be personalized by every user, but its font size can only be customized by admin. The font size customization activity is only limited to admin and cannot personalized by every end user who logs in to the website.

Let’s create the label webpart which are discussing. So we will create a webpart whose label data can be personalized as per every user and the font size can only be customized by the admin. The first thing is that we need to create a class for the webpart. Below is the code snippet of the webpart class. We have created two private properties font size and label data.

public class SimpleLabelCustomization : WebPart
    {
        private int _intFontSize;
        private string _strLblData = "";

}

Second thing we need to do is define the personalization scope for both of these properties.We want the label data changes to be personalized as per user. So we need to attribute the personalizable to personalizationscope.user. In order to display description and display name we specified the ‘WebDisplayName’ and ‘WebDescription’.

[Personalizable(PersonalizationScope.User),
        WebBrowsable(true),
        WebDisplayName("Personalize your Label data"),
        WebDescription("This label is a personalized webpart")]
        public string LabelData
        {
            get { return _strLblData; }
            set {_strLblData = value; }
        }

We want font size changes to view by all users so we need to attribute the "personalizable" value to "personalizationscope.Shared".

[Personalizable(PersonalizationScope.Shared),
        WebBrowsable(true),
        WebDisplayName("Customize font size for every one"),
        WebDescription("This label is a customized webpart")]
        public int FontSizeValue
        {
            get{ return _intFontSize; }
            set{_intFontSize = value; }
        }

Below is the complete code snippet with explanation.

So now that we are done with our webpart we need to deploy the same. You can see the previous question to understand how to deploy a webpart. Now let’s see the fun of personalization. To personalize the page you need to click on the top right hand corner and then click personalize page. Now if you edit the webpart you will see only the label data can be changed. This because we have given label data as user based personalization and font size as shared personalization.

To customize the webpart we need to click on site action and click edit page. You can now see both the properties. The site actions menu can be restricted to administrators to have a better control on customization and personalization.

To see the actual action create two different login’s and change data with each user logged in. You will see that depending with what username you have logged in you will see the label data as per user personalization.

How can we create a custom editor for WebPart?

There are situations where you want to use your own custom WebPart editor rather than using the default WebPart editor.

Note: - In case you do not know how to deploy a WebPart
we advice you to read the answer for question “Can you explain the 6 steps we
need to create a WebPart in SharePoint?

To make your own custom web part editor is a four step procedure.

Step 1: - So the first the thing is to create the WebPart. We need to make a slight change i.e. ‘WebBrowsable (false)” so that it does not use the default ‘WebPart’ editor. Below is the code snippet of the same font size ‘WebPart’ which has ‘WebBrowsable’ value as false.

Step 2 : - The other thing which we need to do in the WebPart is override the ‘CreateEditorParts’ method and add our custom webpart editor. We will be seeing in the next step how we can create the web part editor. For this example we have created ‘SimpleWebPartEditor’.

Step 3: - In order to create your custom web part editor the first step we need to do is inherit from ‘EditorPart’ class. Currently we have created a custom web part editor class called as 'SimpleLabelWebPart’. In this custom class we have create two labels and two text boxes. The two textboxes will take font size and label value while the labels will display description for those text boxes. In other words we have defined our UI which take inputs which can customize our web part.

Step 4: - Two ctivities takes place in general one is when we the user gives customization values which customizes the web part and the other when we need to synchronize the customization values with web part.

The web part customization values are stored in content database according to user logged in. So when customization data is provided for a web part through our custom web part editor we need to override the ‘ApplyChanges’ method and push the customization data to the web part object. So in other words the data is pushed from the web part editor to the content database on per user basis.

Now comes the second aspect where we need to synch the web part data from content database with the web part itself. For this we need to override the ‘syncchanges’ method and push the data
from the web part object in to the web part editor user interface.Ok , now if you edit your web
part you can see how the custom editor looks like.

What are List and Content Types in SharePoint?

SharePoint is all about data and collaboration of the data between different types of users. When we talk about data it varies from user to user and different types of meta-data. For instance below we have four kinds of user’s project manager, accountant, security personnel and HR.

All these four users have different kind of data formats. For instance the accountant needs to save data with different data types and fields like voucher number( 20 character string) , voucher date (MM/DD/YYYY), debit (Boolean true) , credit ( Boolean false) and amount ( Double). The security needs In-time, out-time, items carried and biometrics data.In order to bring a flexible collaborative data model which can be further extended SharePoint brought in something called as List and Content Types. Data was visualized in terms of List data as shown below. With this approach you can add more fields and content type on a need basis.

The best part about organizing data in list is the amount of flexibility and extensibility we can bring in. Some of the flexibility a list type of approach brings in are give below :-
Different views of the list
For instance an employee list can view employee wise or date wise.

Create content from external list storage

You can take a excel and instruct SharePoint to create a list of that type.

Which are the various ready made list types that
SharePoint provides currently?

There are approximately thirteen different ready made list types, below mentioned are some of the most used ones.

Document library

Used for collaborating on documents with support for versioning, check-in and check-out, and workflow. Includes support for deep integration with Microsoft Office.

Form library

Used to store XML documents and forms for use with Microsoft Office InfoPath.

Wiki page libraryUsed for collaborative Web pages based on wiki pages, which are dynamically generated and collaboratively edited Web pages.Picture libraryA specialized document library enhanced for use with pictures. Includes support for slide shows, thumbnails, and simple editing through Microsoft Office Picture Manager.AnnouncementsUsed for simple sharing of timely news with support for expiration.ContactsA list for tracking people and contact information, with support for integration into Microsoft Office
Outlook and other WSS-compatible contacts applications.DiscussionsA simple list for threaded discussions with support for approval and managing discussion threads.LinksA list for managing hyperlinks.CalendarA list for tracking upcoming events and deadlines. Includes support for integration and synchronization with Office Outlook.TasksA list of activity-based items that can integrate with workflow.Project tasksAn enhanced tasks list with support for Gannt chart rendering and integration with Microsoft Office Project.Issue tracking

A list for tracking issues and resolution, with support for prioritization.Custom listAn empty list definition for extending with custom columns, or created using Microsoft Office Excel spreadsheets

Source code

Above attached is the source code which shows simple web parts, custom web parts and custom web part editor. Please fell free to modify and understand the concepts.

SharePoint Interview Questions - Part 3

Introduction

This article is the Part 3 of the SharePoint. Please feel free to download my free 500 question and answer ebook which covers .NET, ASP.NET, SQL Server, WCF, WPF, WWF @ http://www.questpond.com/

SharePoint Quick Start FAQ Part III

Previous SharePoint QuickStart FAQ
• Quick Start FAQ Part 1 :- 11 basic FAQ questions , must for every new
comer.It's a the basic Quick Start FAQ tutorial which talks about What is
SharePoint ,WSS,MOSS, Site/Site collection , Virtual Path provider and then ends
with explaining SitePages and Application pages
• Quick Start FAQ part 2:- This is the second part in the series which explains
the ready made functionalities, custom pages, deploying/activating/deactivating
features and lot. :-

How can we provision page template and page instances?
Before we move ahead with this question let’s first define provisioning. Provisioning is a fancy name of making something available. So let’s first create a page template using the ‘Default.Master’ and
the see how we can provision this page on the website.. So below is the code snippet where we can create a master page from the ‘Default.Master’.

<%@ Page MasterPageFile="~masterurl/default.master"%>

<asp:Content runat="server" ContentPlaceHolderID="PlaceHolderMain">
<h3>Hi this is a Page made from Page template</h3>
</asp:Content>

In order to use the template we need to create an instance in the SharePoint runtime. Creating a instance of the template in
the SharePoint runtime is termed as provisioning.




We need to use the ‘Module’ and ‘File’ tag to
provision an instance of the template page. This is done in the
‘ElementManifest.XML’ file. Below is the code snippet of ‘ElementManifest.XML’
file which has the module tag with a file tag specifying what the URL page name
is? This is the same template which we had shown on the top. ‘PageA.aspx’ is the
instance name and ‘MyPage.aspx’ is the physical page name of the template page.

The type attribute has two values ‘Ghostable’ and ‘GhostableInLibrary’. If you
want to provision a resource inside a document library then you need to specify
‘GhostableInLibrary’. If you do not want to provision a resource inside a
document library then you need to specify ‘Ghostable’ value. For the current
exercise we have given the value as ‘Ghostable’.
A note the path attribute has the page in the ‘MyPath’ folder.

<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
<Module Path="MyPage" Url="SitePages">
<File Url="MyPage.aspx" Name="PageA.aspx" Type="Ghostable" />
</Module>
</Elements>

As said previously we also need to define the feature.xml file which has the receiver class and the element manifest pointing
to the elementmanifest.xml file.

<Feature Id="701B7EA3-0816-4a5f-8FFE-AD15F0E5B562" Title="Provision"
Scope="Web"
Description="This features enables us to goto Custom Page"
Hidden="FALSE"
ImageUrl="menuprofile.gif"
ReceiverAssembly="ClassLibrary1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=52bd1db23825a2e4"
ReceiverClass="ClassLibrary1.clsFeatureActivator"
xmlns="http://schemas.microsoft.com/sharepoint/">
<ElementManifests>
<ElementManifest Location="ElementManifest.xml" />
</ElementManifests>
</Feature>

In the receiver class we will add menu items in the quick launch nodes. So in the activation event we will add a link which will activate this feature and in the deactivation event we will remove this feature.

So in the activation event we first need to get reference to the SpSite object
using the URL.

SPSite ObjQuickLaunch = new SPSite("http://mum2815dz:2/sites/LearnSharePoint");

From the SpSite object we get the ‘SpWeb’ object.

SPWeb ObjSpWeb = ObjQuickLaunch.OpenWeb();

From the ‘SpWeb’ object we get reference to all node collection of the Quick launch menu.

SPNavigationNodeCollection QuickLauncNodes = ObjSpWeb.Navigation.QuickLaunch;

Now we create a menu of the page.

SPNavigationNode objMenuItem = new SPNavigationNode("Quest", "SitePages/PageA.aspx");

Add the menu to the quick launch node.

QuickLauncNodes.AddAsFirst(objMenuItem);
ObjSpWeb.Update();

In the deactivation event we will remove the link.

Now that we have done with creating the two xml files and the class which will handle the feature events , use stsadm utility to register the feature. Once you have registered it you should see the feature in the feature list display. We have named the feature as ‘Provision’ so you can
see the ‘Provision’ feature.

Once you activate the feature you should see the ‘Quest’ link which points to the template instance page ‘PageA.aspx’. If you disable the feature you will not be able to browse the page instance.

Why customized pages are parsed using no-compile mode?

We had discussed previously two types of pages site pages and application pages. Site pages can be customized while application pages are standard pages like ‘settings.aspx’ which is common across sites.

When a user customizes a site page a customized version of the site page is
saved in the content database. This provides lot of flexibility but it has its
own disadvantages. We can customize site pages using ‘SharePoint Designer’.


Now let’s try to understand how a customized site page which is saved content is processed. Customized site pages are processed in six steps:-

• Step 1:- The user requests a customized page.

• Step 2:- SharePoint HTTP handler i.e. ‘SPVirtualPathProvider’ picks the
request and shoots a query to the content database to fetch the page.

• Step 3:- Site page is retrieved and sent to the SharePoint handler.
• Step 4:- The site page data is given to the ASP.NET parser. Please note this
ASP.NET parser is not the one which IIS uses. This is made especially for
SharePoint.

• Step 5:- Parser parses and gives the output to the handler.

• Step 6:- Handler finally gives the output back to the client.

Below is the reason why non-compiled pages are more efficient then compiled pages.

Compiled pages Non-Compiled pages

Once the compiled ASP page DLL is loaded it gets unloaded only when the App
Domain gets recycled. It can be loaded and unloaded. In this scenario the memory
management is more efficient.
What is safe mode processing and Safe Controls?
Any customized page is parsed using safe mode processing. This parsing brings in security. Safe mode processing guarantees that there is no inline script in the customized page. In other words safe mode processing disallows in-line script because a hacker can mount attack using in-line script. If you try to run in-line script on customized page you will get error ‘Code blocks are not allowed in this file’.

In case you still want to run in-line script in customized pages you need to specify ‘AllowServerSideScript=true’ in the ‘SafeMode’ tag section in web.config
file.

<SharePoint>
<SafeMode ... >
<PageParserPaths>
<PageParserPath
VirtualPath="/sites/MySite/SitePages/*"
IncludeSubFolders="true"
CompilationMode="Always"
AllowServerSideScript="true" />
</PageParserPaths>
</SafeMode>
</SharePoint&gt

Safe controls help us define which controls thecustomized pages will have. Customized pages can only have controls which are defined in the web.config file in the ‘SafeControls’ tag. For instance in the below code snippet we have defined that customized pages can use controls from ‘Microsoft.SharePoint.WebControls’.

<SafeControls>
<SafeControl
Assembly="Microsoft.SharePoint"
Namespace="Microsoft.SharePoint.WebControls"
TypeName="*"
AllowRemoteDesigner="True" />
</SafeControls>

Can you explain WSS model?

In order to understand WSS model we need to first understand different types of services used by SharePoint. SharePoint uses two major services in is IIS which is a non-data service and the other is SQL Server i.e. database related services.


SharePoint was designed from the view point that it can be used in web farms. So lets first visualize web farms and then we will try to understand how SharePoint visualized web farms.

Below figure shows two aspects one a normal visualization of a web farm and
other the SharePoint view point. In our normal view (i.e. the left hand side of
the image) we can think of farms having servers and servers having the two
services (i.e. IIS and DB service). When SharePoint visualizes the farm
infrastructure it’s a bit different.

SharePoint visualizes the farm infrastructure in terms of database services and
non-database services. So it visualizes database services attached to servers
and non-database services like IIS differently.

Note: - We are not sure why there is a change in visualization.
So let’s visualize how the WSS object model of SharePoint is seen.

• The parent object in the SharePoint hierarchy is the SPfarm object.

• SPFarm will have collection of server objects i.e. the ‘SPServer’ objects.

• ‘SPServer’ objects further have ‘SPDatabaseServiceInstance’ object.

• ‘SPDatabaseServiceInstance’ has a ‘SPContentDatabase’ object instance.

• From the ‘SPFarm’ you can also browse to services on farm level. ‘SPFarm’ has
‘SPService’ collection.

• ‘SPService’ in turn allow us to browse through IIS application i.e. ‘SPWebApplication’.

• ‘SPWebApplication’ has site collection which in turn has site object which can
be browsed using ‘SPSite’ object.

Now let’s understand the object hierarchy below the ‘SPSite’. ‘SPSite’ / Site belong to site collection. In other words one site collection can have many sites inside it. Site will have lists and list will
have fields.

Below is the code snippet which takes the Farm object , browses through all its services , using the service object browses through all its web application and then using web application browses through all sites.

// Get The local farm object
SPFarm oFarm = SPFarm.Local;

// Get all the services from the farm object
foreach (SPService objService in oFarm.Services)
{
// Check if this is a WebService type of object
if (objService is SPWebService)
{
// Cast it to a WebService object
SPWebService oWebService = (SPWebService)objService ;

// Get all Webapplications from the WebApplications collection
foreach (SPWebApplication oWebApplication in oWebService.WebApplications)
{
// Loop through all the sites
foreach (SPSite oSite in oWebApplication.Sites)
{
// Get reference of the Root object
SPWeb oWebRoot = oSite.RootWeb;

// Any kind of processing

// Do not forget to dispose
oWeb.Dispose();
oSite.Dispose();
}
}
}
}

How can we use custom controls in SharePoint?

Step 1:- Create the custom control by inheriting from the ‘WebControl’ class and override the ‘RenderContents’ method with your implementation. In the below code snippet we are just writing the site title and site URL to the browser.

using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.SharePoint;

namespace NameSpaceCustomControl
{
public class CustomControl1 : WebControl
{
protected override void RenderContents(HtmlTextWriter output)
{
SPWeb site = SPContext.Current.Web;
output.Write("The Site title is " + site.Title);
output.Write("<br/>");
output.Write("The URL of the site is " + site.Url);
}
}
}

Step 2:- Compile the custom control class and generate the DLL from the same. Once the compiled DLL is generated, register the same in GAC.

Step 3:- Refer the custom control assembly in your ASPX page using the register
attribute. Please note to specify the public key token of the GAC.

<%@ Register Assembly="CustomControl,Version=1.0.0.0,Culture=neutral,PublicKeyToken=4adae03f3c0d5b8e"
Namespace="NameSpaceCustomControl" TagPrefix="CustomSitePages" %>

Specify the custom control with a proper unique ID.

<CustomSitePages:CustomControl1 ID="cc1" runat="server" />

Below is the complete code of the page.

<%@ Page Language="C#" MasterPageFile="~masterurl/default.master" meta:progid="SharePoint.WebPartPage.Document"%>

<%@ Register Assembly="CustomControl,Version=1.0.0.0,Culture=neutral,PublicKeyToken=4adae03f3c0d5b8e"
Namespace="NameSpaceCustomControl" TagPrefix="CustomSitePages" %>

<asp:Content runat="server" ContentPlaceHolderID="PlaceHolderMain">

<h3>Hi this is a Site Page</h3>
<CustomSitePages:CustomControl1 ID="cc1" runat="server" />

</asp:Content>

Now if you run the page you can see the custom control in action.

How can you view a detail error in SharePoint?

SharePoint does not give error in a user-friendly manner or in a confusing manner. For instance below figure shows it has shown ‘File not found; but the root cause is something different. Developers would like to get the exact function / method name in which the error
has occurred.

There are four steps, in other words there are three changes we need to make to the config file and do IIS reset. So let’s go through the four steps to get the actual cause of the above error.

As said previously we need to change the ‘web.config’ file in three different
places. You can get the ‘web.config’ file from ‘C:\Inetpub\wwwroot\wss\VirtualDirectories\80’
folder.

Step 1 :-Change callstack value from false to true in SafeMode attribute as
shown below.

Change

<SafeMode MaxControls="200" CallStack="false" ...> 

to

<SafeMode MaxControls="200" CallStack="true" ...>

Step2:- Change ‘customErrors’ tag mode from
‘On’ to ‘Off’.

Change

<customErrors mode="On" /> 

to

<customErrors mode="Off" /> 

Step3 :- Change ‘Debug’ from ‘false’ to ‘true’ in ‘Compilation’ attribute.

Change

<compilation batch="false" debug="false"> 

to

<compilation batch="true" debug="true">

Step 4 :- Restart the IIS.

You can now see a detail stack error which shows which method exactly has the
issue. For instance in this scenario the ‘FeatureDeactivation’ event has the
error.

The error in ‘FeatureDeactivation’ event happened because of the wrong URL specified for the ‘SPSite’. If you see the previous error it showed as ‘File not found’ , but in actual it was due to wrong URL name.

How can we display ASCX control in SharePoint pages?

Custom controls in ASP.NET provide huge level
of reusability in ASP.NET. They are normally simple controls with ASCX
extensions which can be reused in different ASPX pages. We will not be getting
in to details of what an ASCX control is. In case you are not familiar with the
basics please do read any ASP.NET basic book and we are sure it’s not a rocket
science.

To load an ASCX control in SharePoint environment is a simple five step process.

Step1:- We need to create an ASCX. So below is a simple ASCX file which has a
label ‘lblDisplay’. There are two functions ‘setText’ and ‘ClearText’ one which
sets the label to value and the other clear the label. Both these methods
‘setText’ and ‘clearText’ are called by event click of two buttons ‘cmdSet’ and
‘cmdClear’ respectively.

<%@ Control Language="C#" %>
<script runat="server">
protected void SetText(object sender, EventArgs e)
{
lblDisplay.Text = "This is a user control";
}
protected void ClearText(object sender, EventArgs e)
{
lblDisplay.Text = "";
}
</script>
<asp:Button ID="cmdSet" runat="server" Text="Click Me" OnClick="SetText" />
<br/>
<asp:Button ID="cmdSetClear" runat="server" Text="Click to clear text" OnClick="ClearText" />
<br/>
<asp:Label ID="lblDisplay" runat="server" Text="" />

Step 2:- We need to refer this ASCX file in a
ASPX page using the register attribute and refer the same using the ‘TagPrefix’
and ‘TagName’. Below is the code snippet in which we have highlighted the same
in bold.

<%@ Assembly Name="Microsoft.SharePoint,Version=12.0.0.0, Culture=neutral,PublicKeyToken=71e9bce111e9429c" %>

<%@ Page Language="C#" MasterPageFile="~/_layouts/application.master" Inherits="Microsoft.SharePoint.WebControls.LayoutsPageBase" %>

<%@ Register TagPrefix="MyUserControlPrefix" TagName="MyUserControlName" src="~/_controltemplates/MyUserControl/MyUserControl.ascx" %>

<%@ Import Namespace="Microsoft.SharePoint" %>

<asp:Content ID="Content3" ContentPlaceHolderId="PlaceHolderPageTitle" runat="server">
This page displays Custom Control in Action
</asp:Content>

<asp:Content ID="Content1" ContentPlaceHolderId="PlaceHolderMain" runat="server">
<MyUserControlPrefix:MyUserControlName ID="id2" runat="server" />
</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderId="PlaceHolderPageTitleInTitleArea" runat="server">
We never knew custom control is so easy to display.
</asp:Content>

Below figure shows the overall view, interaction and explanation of ‘MyUserControl.ascx’ and ‘PageUsingCustomControl.aspx’.


Step 3:- We need to copy the ASCX control in
the ‘C:\Program Files\Common Files\Microsoft Shared\web server
extensions\12\TEMPLATE\CONTROLTEMPLATES’ directory. For this sample we have
created a simple directory called as ‘MyUserControl’ and uploaded
‘MyUserControl.ascx’ in the same. If you remember we had referred the ASCX file
using the virtual path sign ‘~’ with the ‘MyUserControl’ folder.

<%@ Register TagPrefix="MyUserControlPrefix" TagName="MyUserControlName" src="~/_controltemplates/MyUserControl/MyUserControl.ascx" %>

Step 4:- We also need to paste the ASP.NET page ‘PageUsingCustomControl.aspx’ in
the layouts folder located at ‘C:\Program Files\Common Files\Microsoft
Shared\web server extensions\12\TEMPLATE\LAYOUTS’.

Step 5:- This is the easiest step we need to the run the ASPX page and enjoy the
how user control runs under the SharePoint environment. Below is how the user
controls looks. If you click the button ‘Click me’ the label is set with a text
‘This is a user control’. If you click on ‘Click to clear text’ it will just
clear the values of the label.

Note: - If you are using behind code you need to register the behind code in to GAC and refer the same in the ASCX. In this example we have just used in-line code for simplicity.

What are WebParts and how does it interact with SharePoint ?

It helps to build reusable components which can customized and personalized according to business user. We can either make our own webpart or we can reuse the existing one's from SharePoint itself.



Following WebParts are available with WSS :-



Data View Web Part: - Displays data with rich design support through Microsoft
SharePoint Designer.



List View Web Part: - Helps us to display list content for any list in the
SharePoint site.



Image Web Part: - Helps us to display image files.



Content Editor Web Part Use this to display static HTML content using a WYSIWYG
editor or to link to a text file.



Members Web Part: - Helps us to display members of the site.



Page Viewer Web Part: - Displays web page in an Iframe.



WebPart is nothing but a simple class which inherits from
System.Web.UI.WebControls.WebParts. In other words you can say WebPart is kind
of a WebControl which can be deployed in a WebPartZoneControl.

WebPart manager control is like controller which maintains instances of Webpart. It adds WebParts to the WebPartZone when
the ASP.NET pages get initialized.


In my QuickStart fourth series I will make a point to cover WebPart’s in more detail.

Source code
Attached the source code which we have referred
in this article feel free to use it

Download The Source Code Click Here