How to replace a asp.net control with a custom control

  This article mainly describes the way to replace a asp.net control with a custom control, which you need to refer to in the following

Function: You can replace a asp.net control with a custom control     pages tagmapping element (asp.net setup schema)     defines a collection of tag types that are mapped at compile time to other The tag type.     This element is a new element in the. NET Framework version 2.0.   Code as follows: <pages>  <tagMapping>  <add  tagtype=  " System.Web.UI.WebControls.WebParts.WebPartManager "  mappedtagtype= " microsoft.sharepoint.webpartpartmanager,  MSPS. Web.dll, version= ' 2.0.0.0 ' " />  </tagMapping>  </pages>    front-end code:    Code as follows: <form id= "Form1" runat= "Server" >  <div>  <asp:label id= "LB1" runat= "Server" text= "LB" ></asp:Label>  </div>  </form>    Its generated HTML is as follows:  code as follows: <form name= "Form1" method= "post" action= "default.aspx" Id= "Form1" >  <div>  <input type= "hidden" name= "__" VIEWSTATE "id=" __viewstate "value="/wepdwullte1odyxmzexnjlkzirgta8ogwnrnqd7v9zkx3zxclan "/>  </div>     <div>  <span id= "LB1" >lb</span>  </div>  </form>    in the pages node of the configuration file add     The code is as follows: <tagMapping>  <add tagtype= "System.Web.UI.WebControls.Label" mappedtagtype= cjq. Web.mylabel "/>  </tagMapping>    The code for the custom control is   code as follows: namespace CJQ. web  {  public class mylabel:system.web.ui.webcontrols.label  {  protected override void Rendercont Ents (System.Web.UI.HtmlTextWriter writer)   {  writer. Write ("Receive:");  base. RenderContents (writer); }   } }    Its generated HTML follows the following:  code: <form name= "Form1" method = "POST" action= "default.aspx" Id= "Form1" >  <div>  <input type= "hidden" name= "__viewstate" id= "_ _viewstate "value="/wepdwullte1odyxmzexnjlkzirgta8ogwnrnqd7v9zkx3zxclan "/>  </div>    < div>  <span id= "LB1" > Receive:lb</span>  </div>  </form>