In this article I try to explain how we can use the Ajax Control Toolkit in Sharepoint. The ASP.NET AJAX Control Toolkit provides a set of controls and extenders that makes a web site rich. But if you like the Ajax Control toolkit, there is no direct way to plug and play it in Sharepoint. You have to follow the steps below-
  1. Download the Ajax Control Toolkit.
  2. Add a new tab in the toolbox

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    Choose items -> browse and select AjaxcontrolToolkit.dll

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  3. Open the sharepoint web.config and update the following sections
    4.

    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <    configuration>
    <    configSections>
    <!--    AJAX.NET SUPPORT 1 of 8 START-->
    <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">

    <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">

    <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />

    <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">

    <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" />

    <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />

    <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />

    <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />

    </sectionGroup>

    </sectionGroup>

    </sectionGroup>
    <!--    AJAX.NET SUPPORT 1 of 8 END-->
    </    configSections>
    <    SharePoint>
    <    SafeControls>
    <!--    AJAX.NET SUPPORT 2 of 8 START-->
    <    SafeControl Assembly="System.Web.Extensions, Version=3.5.0.0,Culture=neutral, PublicKeyToken=31bf3856ad364e35" Namespace="System.Web.UI" TypeName="*" Safe="True" />

    <SafeControl Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TypeName="*" Safe="True" />
    <!--    AJAX.NET SUPPORT 2 of 8 END-->
    </    SafeControls>
    </    SharePoint>
    <    system.web>
    <    httpHandlers>
    <!--    AJAX.NET SUPPORT 3 of 8 START-->
    <    remove verb="*" path="*.asmx" />
    <    add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    <    add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    <    add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false" />
    <!--    AJAX.NET SUPPORT 3 of 8 END-->
    </    httpHandlers>
    <    httpModules>
    <!--    AJAX.NET SUPPORT 4 of 8 START-->
    <    add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    <!--    AJAX.NET SUPPORT 4 of 8 END-->
    </    httpModules>
    <    compilation batch="false" debug="true">
    <    assemblies>
    <!--    AJAX.NET SUPPORT 5 of 8 END-->
    <    add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    <    add assembly="System.Web.Extensions.Design, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    <!--    AJAX.NET SUPPORT 5 of 8 START-->
    </    assemblies>
    </    compilation>
    <    pages enableSessionState="false" enableViewState="true" enableViewStateMac="true" validateRequest="false" pageParserFilterType="Microsoft.SharePoint.ApplicationRuntime.SPPageParserFilter, Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" asyncTimeout="7">
    <!--    AJAX.NET SUPPORT 6 of 8 START-->
    <    controls>
    <    add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    <    add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    <add tagPrefix="ajaxToolkit" namespace="AjaxControlToolkit" assembly="AjaxControlToolkit" />
    </    controls>
    <!--    AJAX.NET SUPPORT 6 of 8 END-->
    </    pages>
    <    trust level="Full" originUrl="" />
    </    system.web>
    <!--    AJAX.NET SUPPORT 7 of 8 START-->
    <    runtime>
    <    assemblyBinding>
    <    dependentAssembly>
    <    assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/>
    <    bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
    </    dependentAssembly>
    <    dependentAssembly>
    <    assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>
    <    bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
    </    dependentAssembly>
    </    assemblyBinding>
    </    runtime>
    <!--    AJAX.NET SUPPORT 7 of 8 END-->
    <!--    AJAX.NET SUPPORT 8 of 8 START-->
    <    system.web.extensions>
    <    scripting>
    <    webServices>
    <    jsonSerialization maxJsonLength="500000">
    <    converters>
    </    converters>
    </    jsonSerialization>
    </    webServices>
    <    scriptResourceHandler enableCompression="false" enableCaching="true" />
    </    scripting>
    </    system.web.extensions>
    <    system.webServer>
    <    validation validateIntegratedModeConfiguration="false" />
    <    modules>
    <    add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    </    modules>
    <    handlers>
    <    remove name="WebServiceHandlerFactory-ISAPI-2.0" />
    <    add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    <    add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    <    add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    </    handlers>
    </    system.webServer>
    <!--    AJAX.NET SUPPORT 8 of 8 END-->
    </    configuration>

  4. Make sure SharePoint has access to AjaxControlToolkit.dll by either deploying the assembly to the Global Assembly Cache (GAC) or by putting in the \BIN folder of the SharePoint site's folder.

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  5. Edit the sharepoint master page in Sharepoint designer and add ToolkitScriptManager to the it

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  6. Now you can to write your code, open project in Visual studio 2008 then add reference of System.Web.Extensions, AjaxControlToolkit to the project. (In my case I am using one of my existing Web part application from sharepoint webpart using ASP.NET web user control.
  7. In SampleWebUserControl.ascx drag drop the UpdatePanel and CalendarExtender

    8. <%@ Control Language="C#" AutoEventWireup="true" Inherits="SampleWebPart.SampleWebUserControl, SampleWebPart, Version=1.0.0.0, Culture=neutral, PublicKeyToken=9f4da00116c38ec5" %>

    <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>

    <asp:UpdatePanel ID="UpdatePanel1" runat="server">

    <ContentTemplate>

    <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"

    AutoGenerateColumns="False" CellPadding="4" DataKeyNames="CustomerID" DataSourceID="SqlDataSource1"

    GridLines="Horizontal" BackColor="White" BorderColor="#000000"

    BorderWidth="1px">

    <RowStyle BackColor="#C8C7C7" ForeColor="Black" />

    <AlternatingRowStyle BackColor="#F9F6F6" ForeColor="#55514B" />

    <Columns>

    <asp:BoundField DataField="CustomerID" HeaderText="CustomerID" InsertVisible="False"

    ReadOnly="True" SortExpression="CustomerID" Visible="False" />

    <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />

    <asp:BoundField DataField="FirstName" HeaderText="FirstName" SortExpression="FirstName" />

    <asp:BoundField DataField="MiddleName" HeaderText="MiddleName" SortExpression="MiddleName" />

    <asp:BoundField DataField="LastName" HeaderText="LastName" SortExpression="LastName" />

    <asp:BoundField DataField="Suffix" HeaderText="Suffix" SortExpression="Suffix" />

    <asp:BoundField DataField="CompanyName" HeaderText="CompanyName" SortExpression="CompanyName" />

    <asp:BoundField DataField="SalesPerson" HeaderText="SalesPerson" SortExpression="SalesPerson" />

    <asp:BoundField DataField="EmailAddress" HeaderText="EmailAddress" SortExpression="EmailAddress" />

    <asp:BoundField DataField="Phone" HeaderText="Phone" SortExpression="Phone" />

    </Columns>

    <FooterStyle BackColor="White" ForeColor="#333333" />

    <PagerStyle BackColor="#3F3F3F" ForeColor="White" HorizontalAlign="Center" />

    <SelectedRowStyle BackColor="#339966" Font-Bold="True" ForeColor="White" />

    <HeaderStyle BackColor="#3F3F3F" Font-Bold="True" ForeColor="White" />

    </asp:GridView>

    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:AdventureWorksConnectionString %>"

    SelectCommand="SELECT [CustomerID], [Title], [FirstName], [MiddleName], [LastName], [Suffix], [CompanyName], [SalesPerson], [EmailAddress], [Phone]

    FROM SalesLT.Customer"></asp:SqlDataSource>

    </ContentTemplate>

    </asp:UpdatePanel>

    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

    <ajaxToolkit:CalendarExtender ID="CalendarExtender1" runat="server" PopupButtonID="Button1"

    TargetControlID="TextBox1">

    </ajaxToolkit:CalendarExtender>
    <asp:Button ID="Button1" runat="server" Text="+" />

  8. So finally you have the AjaxControlToolkit working in your sharepoint website

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