关于gridview模板列中的控件事件的问题

这个是我原来做全选并删除时写的代码，希望对楼主有用
protected void Button1_Click(object sender, EventArgs e)
    {
        if (Button1.Text == "全部选中")
        {
            foreach (GridViewRow row in GridView1.Rows)
            {
                CheckBox CheckBox1 = (CheckBox)row.Cells[0].FindControl("CheckBox1");
                CheckBox1.Checked = true;
            }
            Button1.Text = "全部不选";
        }
        else
        {
            foreach (GridViewRow row in GridView1.Rows)
            {
                CheckBox CheckBox1 = (CheckBox)row.Cells[0].FindControl("CheckBox1");
                CheckBox1.Checked = false;
            }
            Button1.Text = "全部选中";
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        foreach (GridViewRow row in GridView1.Rows)
        {
            CheckBox CheckBox1 = (CheckBox)row.Cells[0].FindControl("CheckBox1");
            if (CheckBox1.Checked == true)
            {
                SqlConnection con = DB.createCon();
                SqlCommand cmd = new SqlCommand("delete from customer where customer_id='" + row.Cells[0].Text + "'", con);
                con.Open();
                cmd.ExecuteNonQuery();
                GridView1.DataBind();
                con.Close();
            }
        }
    }