I am using one ButtonField in Gridview1.If i click that buttonfield it will be fill the next gridview2.

So i am using rowcommand for this purpose
if (e.CommandName == "nextgrid")
{
string orderid = Convert.ToString(e.CommandArgument);
Fillgrid(orderid);
}

fillgrid is the fun to fill second grid.here this orderid takes just row value only that is 1 or 2 not its original value like ID1234.

if i am using this in row command
string orderid = Convert.ToString(grdorders.DataKeys[e.RowIndex].Value);
Fillgrid(orderid);

I got the error "Error GridViewCommandEventArgs' does not contain a definition for 'RowIndex'

Where i can use this RowIndex or any other way to get this buttonfield value and use this value to fill second grid.

I think you need to populate the second grid by clicking a button in a gridrow.I have made Button Type=Button and you can change either to Link type/Image type according to your requirement.

ASPX:

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Style="z-index: 100;
            left: 211px; position: absolute; top: 213px" OnRowDataBound="GridView1_RowDataBound"  OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
            <Columns>
             <asp:BoundField DataField="ProductID"></asp:BoundField>
              <asp:BoundField DataField="ProductName"></asp:BoundField>
                <asp:BoundField DataField="SupplierID">
                 </asp:BoundField> 
                 <asp:CommandField ButtonType="Button" ShowSelectButton="True" />
            </Columns>
        </asp:GridView>

ASPX.CS

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{

    GridViewRow row = GridView1.SelectedRow;
    int supplierID = Convert.ToInt32(row.Cells[2].Text);

}

In this case i am retreving the supplierID to populate the other grid.

Good Luck.

Thank u .Its working.

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