I want update and edit button at the end of row in grid view

You could easily arrange the order of the Columns within the GridView if you set AutogenerateColumns property to false.

Since you were using AutogenerateColumns, then you could try something like this:

<asp:gridview id="GridView1" runat="server" onrowcreated="GridView1_RowCreated" cssclass="table table-responsive">
    <columns>
      <asp:commandfield showeditbutton="True">
    </asp:commandfield></columns>
</asp:gridview>

Code Behind:

protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e){

        GridViewRow row = e.Row;
        // Intitialize TableCell list
        List<tablecell> columns = new List<tablecell>();
        foreach (DataControlField column in GridView1.Columns)
        {
            //Get the first Cell /Column
            TableCell cell = row.Cells[0];
            // Then Remove it after
            row.Cells.Remove(cell);
            //And Add it to the List Collections
            columns.Add(cell);
        }

        // Add cells
        row.Cells.AddRange(columns.ToArray());
}
</tablecell></tablecell>

The code above will move the autogenerated columns to the left most column in your GridView.