I have added the Gridview control on a webPage.

I am deleting any row (one row at a time) by calling PageMethod as follow:

    <script type="text/javascript">
      function Delete_Row(){
        PageMethods.DeleteRow(row_id, GetTimeCallback, ErrorHandler, TimeOutHandler);
      }
      GetTimeCallback = function (result) 
      {
         if (result) {
            alert('Row is deleted');
            // I want to refresh the Gridview here
          }
      }
    <script type="text/javascript">

where "row_id" is primery key of the row.

It shows the alert perfectly but does not refresh the Gridview with one less deleted row.
what code should i write to Update the gridview?
NOTE: I dont want to refresh entire page.

I have added the Gridview control on a webPage.

I am deleting any row (one row at a time) by calling PageMethod as follow:

    <script type="text/javascript">
      function Delete_Row(){
        PageMethods.DeleteRow(row_id, GetTimeCallback, ErrorHandler, TimeOutHandler);
      }
      GetTimeCallback = function (result) 
      {
         if (result) {
            alert('Row is deleted');
            // I want to refresh the Gridview here
          }
      }
    <script type="text/javascript">

where "row_id" is primery key of the row.

It shows the alert perfectly but does not refresh the Gridview with one less deleted row.
what code should i write to Update the gridview?
NOTE: I dont want to refresh entire page.

• c#
• javascript
• asp
• gridview

1 Answer 1

Write CallBack Function to acheive this...You can find the Callback Functionality at http://msdn.microsoft./en-us/library/ms178208 and http://msdn.microsoft./en-us/library/ms178210

Edit:-

   protected void Page_Load(object sender, EventArgs e)
   {
    String cbReference =Page.ClientScript.GetCallbackEventReference(this,
        "arg", "ReceiveServerData", "context");
    String callbackScript;
    callbackScript = "function CallServer(arg, context)" +
        "{ " + cbReference + ";}";
    Page.ClientScript.RegisterClientScriptBlock(this.GetType(),
        "CallServer", callbackScript, true);

   }


 System.IO.StringWriter strDataGridHtml= new System.IO.StringWriter(); 

 public void RaiseCallbackEvent(String eventArgument)
    {
         string idToBeDeleted=eventArgument;
         //Write deleteCode
         //DataBind the Grid
         HtmlTextWriter htwObject = new HtmlTextWriter(strDataGridHtml);
         GridViewControl.RenderControl(htwObject);
    }        

public String GetCallbackResult()
    {
        return strDataGridHtml.ToString();
    }

Now as you see this strDataGridHtml will be sent to Javascript Function ReceiveServerData...

<script type="text/ecmascript">

    function ReceiveServerData(rValue)
    {   
        document.getElementById("divIDWhichEncapsulategridView").innerHTML = rValue;

    }
  </script>

Hope this Will Help you..As i don't i have your full code i can't write the exact one...but this should give you some idea on how to proceed...And also please go through the "CallBack" Functionality in order to understand this functionality to the fullest..