To retrieve the values from a DataKeyNames collection

To retrieve the values from a DataKeyNames collection, you can use the following things. You can use the following code to get the DataKeys.



Here, You can input multiple values for DataKeyNames by separating with comma (‘,’). For example, DataKeyNames="ProductID,ItemID,OrderID"
You can now access each of DataKeys by providing its index like below:
string ProductID = gvNoteSheet.DataKeys[gvr.RowIndex].Values[0].ToString();
string ItemID = gvNoteSheet.DataKeys[gvr.RowIndex].Values[1].ToString();
string OrderID = gvNoteSheet.DataKeys[gvr.RowIndex].Values[2].ToString();

Use Ajax Slider as Paging in Grid View

for using Slider as paging in grid view first of all we have to use textbox/label control and ajax slider control in grid view .

<PagerTemplate>
    <asp:TextBox ID="txtSlide" runat="server" Text='<%# gvDispatch.PageIndex + 1 %>' OnTextChanged="txtSlide_Changed" AutoPostBack="true" />
         
    <ajaxToolkit:SliderExtender ID="ajaxSlider" runat="server" TargetControlID="txtSlide" Orientation="Horizontal"/>
     </PagerTemplate>


code behind code---c#

protected void txtSlide_Changed(object sender, EventArgs e)
{
    TextBox txtCurrentPage = sender as TextBox;
    GridViewRow rowPager = gvDispatch.BottomPagerRow;
    TextBox txtSliderExt = (TextBox)rowPager.Cells(0).FindControl("txtSlide");
    gvDispatch.PageIndex = Int32.Parse(txtSliderExt.Text) - 1;
    BindDispatchData();
}

protected void  gvDispatch_RowDataBound(object sender,System.Web.UI.WebControls.GridViewRowEventArgs e)
{
    GridViewRow rowPager = gvDispatch.BottomPagerRow;
    if ((rowPager != null)) {
        AjaxControlToolkit.SliderExtender slide = (AjaxControlToolkit.SliderExtender)rowPager.Cells(0).FindControl("ajaxSlider");
        slide.Minimum = 1;
        slide.Maximum = gvDispatch.PageCount;
        slide.Decimals = true;
        slide.Length = gvDispatch.PageCount;
        slide.Steps = gvDispatch.PageCount;
    }
}

after rendering page slider take over Textbox/label control