如何实现ASP.Net复合服务器控件的ClientInstanceName属性

Question

如何在自己的服务器控件中实现DevExpress用于其控件的ClientInstanceName属性？

ClientID属性是只读的。这是否意味着我将不得不等待，直到HTML生成，然后替换名称属性？

有没有办法在c＃中做到这一点，或者我必须在JavaScript中做到这一点？

在此先感谢。

Answer 1

这里是我想出了（有任何建议或改进，将不胜感激）：

  private String _ClientInstanceName; 

      /// <summary> 
      /// Gets or Sets the client instance name. 
      /// </summary> 
      [ 
      Bindable(true), Category("Client-Side"), 
      DefaultValue(""), Description("The ClientInstanceName can be used to reference this control on the client.") 
      ] 
      public String ClientInstanceName 
      { 
       get 
       { 
        return _ClientInstanceName; 
       } 
       set 
       { 
        _ClientInstanceName= value; 
       } 
      } 


     protected override void OnPreRender(EventArgs e) 
     { 
      base.OnPreRender(e); 

      //Register startup script for creating JavaScript reference to this server control object. 
      if (this.ClientInstanceName.Length > 0) { registerClientInstanceName(this.ClientInstanceName, this.ClientID); } 
     } 

     /// <summary> 
     /// Create a JavaScript reference to the Object with ClientID using the ClientInstanceName property. 
     /// Based on: http://msdn.microsoft.com/en-us/library/asz8zsxy.aspx 
     /// </summary> 
     /// <param name="ClientInstanceName"></param> 
     private void registerClientInstanceName(String ClientInstanceName, String ClientID) 
     { 
      // Define the name and type of the client scripts on the page. 
      String csname1 = "ClientInstanceNameScript"; 
      Type cstype = this.GetType(); 

      // Get a ClientScriptManager reference from the Page class. 
      ClientScriptManager cs = Page.ClientScript; 

      // Check to see if the startup script is already registered. 
      if (!cs.IsStartupScriptRegistered(cstype, csname1)) 
      { 
       StringBuilder cstext1 = new StringBuilder(); 
       cstext1.Append("<script type=text/javascript>"); 
       cstext1.Append("window['" + ClientInstanceName + "']=document.getElementById('" + ClientID + "');"); 
       cstext1.Append("</script>"); 

       cs.RegisterStartupScript(cstype, csname1, cstext1.ToString()); 
      } 
     }