changing pageindex from manual button in gridview

.cs

 protected void Button1_Click(object sender, EventArgs e)
    {
        Button b1 = (Button)sender;
        GridViewRow gr = (GridViewRow)b1.NamingContainer;
        int index = gr.RowIndex;
        GridView1.EditIndex = index;
        bind();
    }




Removing radiobutton items from top

protected void Button1_Click(object sender, EventArgs e)
    {
        foreach (GridViewRow gr in GridView1.Rows)
        {
            RadioButtonList r1 = (RadioButtonList)GridView1.Rows[gr.RowIndex].FindControl("RadioButtonList1");
            r1.Items.RemoveAt(0);
        }

    }