How To Overload Items.Add Procedure In Inherited Class From DropDownList
Jul 11, 2010I have my own custom class which inherits from DropDownList. Is there a way to override Items.Add procedure? How?
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Server Error in '/DentalClaimPrjt' Application.
Cannot have multiple items selected in a DropDownList.
Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: Cannot have multiple items selected in a DropDownList.
Source Error: [Code]....
Line 85: function openPopup2(did)
Line 86: {
Line 87: var hdnClm1 = document.getElementById('<%=hdnCliamid.ClientID%>').value;
Line 88: window.location="Form.aspx?DeleteRSPid=" + did + "&Editid="+ hdnClm1;
Line 89: }
Source File: d:DentalClaimPrjtForm.aspx Line: 87 Stack Trace: [Code]....
[HttpException (0x80004005): Cannot have multiple items selected in a DropDownList.]
System.Web.UI.WebControls.DropDownList.VerifyMultiSelect() +106
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