How to Set EnableEventValidation="false" in sharepoint 2010?

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C#3.5

SharePoint2010

Hi experts,
Am using below mentioned code to achieve row selection of a grid view

protected void grdSupplierDetails_RowDataBound1(object sender, GridViewRowEventArgs e)
     {
         try
         {
             if (e.Row.RowType == DataControlRowType.DataRow)
             {
                 e.Row.Attributes.Add("onmouseover", "this.style.cursor='pointer'");
                 e.Row.Attributes["onclick"] = this.Page.ClientScript.GetPostBackClientHyperlink(this.grdSupplierDetails, "Select$" + e.Row.RowIndex.ToString());
                 e.Row.ToolTip = "Click to select this row.";
             }
         }
         catch (Exception ex)
         {
         }
     }

But am getting error as

Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

Can anyone please help me to solve this issue.?
if it is in normal aspx page we can EnableEventValidation="false" in page directive.
How to solve this in sharepoint?

thank you in advance
(Keerthi Kumar)