Getting the selected value of an ASP.NET Radiobuttonlist from javascript

            var radioButtons = document.getElementById('<%=rdbpayment.ClientID%>');
            var inputs = radioButtons.getElementsByTagName("input");
            var selected;
            for (var i = 0; i < inputs.length; i++) {
                if (inputs[i].checked) {
                    selected = inputs[i];
                    break;
                }
            }
            if (selected) {
               alert(selected.value);
            }

Maintain Scrollbar Position Inside UpdatePanel After Partial PostBack

 <asp:ScriptManager ID="ScriptManager1" runat="server" ScriptMode="Release" />
   <script type="text/javascript">
      // It is important to place this JavaScript code after ScriptManager1
      var xPos, yPos;
      var prm = Sys.WebForms.PageRequestManager.getInstance();

      function BeginRequestHandler(sender, args) {
        if ($get('<%=Panel1.ClientID%>') != null) {
          // Get X and Y positions of scrollbar before the partial postback
          xPos = $get('<%=Panel1.ClientID%>').scrollLeft;
          yPos = $get('<%=Panel1.ClientID%>').scrollTop;
        }
     }

     function EndRequestHandler(sender, args) {
         if ($get('<%=Panel1.ClientID%>') != null) {
           // Set X and Y positions back to the scrollbar
           // after partial postback
           $get('<%=Panel1.ClientID%>').scrollLeft = xPos;
           $get('<%=Panel1.ClientID%>').scrollTop = yPos;
         }
     }

     prm.add_beginRequest(BeginRequestHandler);
     prm.add_endRequest(EndRequestHandler);
 </script>

Confirmation Dialog in ASP .NET Gridview template column

In the itemplate control write the highlighted code :

       

</asp:TemplateField HeaderText="Save">
 <ItemTemplate>
     <asp:Button ID="btnSave" runat="server" Text="Save" OnClientClick="return confirm('Do you want to save?')" />
 </ItemTemplate>
</asp:TemplateField>

       
 

Getting row index from a Gridview template column when a Textbox Text is changed

           
            TextBox thisTextBox = (TextBox)sender;
            GridViewRow currentRow = (GridViewRow)thisTextBox.Parent.Parent;
            int rowindex = 0;
            rowindex = currentRow.RowIndex;

Generating Serial number in an Asp.NET Gridview

First create a template control in the Gridview and write the code below inside the ItemTemplate

<%# Container.DisplayIndex+1 %>

Disabling Export to Excel In Reportviewer

' In the Reportviewer Load call the CustomizeRV function
  Protected Sub ReportViewer1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles ReportViewer1.Load
        CustomizeRV(CType(sender, System.Web.UI.Control))
    End Sub


  'CustomizeRV definition
  Private Sub CustomizeRV(ByVal reportControl As System.Web.UI.Control)
        For Each childControl As System.Web.UI.Control In reportControl.Controls
            If childControl.[GetType]() Is GetType(System.Web.UI.WebControls.DropDownList) Then
                Dim ddList As System.Web.UI.WebControls.DropDownList = DirectCast(childControl, System.Web.UI.WebControls.DropDownList)
                AddHandler ddList.PreRender, New EventHandler(AddressOf ddList_PreRender)
            End If
            If childControl.Controls.Count > 0 Then
                CustomizeRV(childControl)
            End If
        Next
    End Sub

    'Event handler definition
Private Sub ddList_PreRender(ByVal sender As Object, ByVal e As EventArgs)
        If sender.[GetType]() Is GetType(System.Web.UI.WebControls.DropDownList) Then
            Dim ddList As System.Web.UI.WebControls.DropDownList = DirectCast(sender, System.Web.UI.WebControls.DropDownList)
            Dim listItems As System.Web.UI.WebControls.ListItemCollection = ddList.Items

            If (listItems IsNot Nothing) AndAlso (listItems.Count > 0) AndAlso (listItems.FindByText("Excel") IsNot Nothing) Then
                For Each list As System.Web.UI.WebControls.ListItem In listItems
                    If list.Text.Equals("Excel") Then
                        list.Enabled = False
                    End If
                Next
            End If
        End If
    End Sub

Paging in Gridview If we dont set Datasource

Declare the dataset as

Shared ds as new Dataset

Bind the gridview using dataset as

Gridview1.Datasource = ds.Table(0)
Gridview1.DataBind()

After that make the AllowPaging = True

Then we have to handle  PageIndexChanging event as bel;ow

Protected Sub GridView1_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewPageEventArgs) Handles GridView1.PageIndexChanging
        Try
            GridView1.PageIndex = e.NewPageIndex
            GridView1.DataSource = dsTmp.Tables(0)
            GridView1.DataBind()
        Catch ex As Exception

        End Try
    End Sub