迴圈gridview把選擇的項指派至

protected void Button2_Click(object sender, EventArgs e)
{
    string name = this.id_croDropDownList.SelectedItem.Text.Trim();
  
    int count = this.GridView1.Rows.Count;
    if (count != 0)
    {
        for (int i = 0; i < count; i++)
        {
            if ((this.GridView1.Rows[i].Cells[0].FindControl("checkbox") as CheckBox).Checked == true)
            {
                str += (this.GridView1.Rows[i].FindControl("lblid") as Label).Text + ",";
            }
        }
    }

    if (str == String.Empty)
    {
    Page.ClientScript.RegisterStartupScript(GetType(), "", "<script>alert('請選擇指派至！')</script>");
    return;
    }

    strsbustring(str,name);

}

private void strsbustring(string str, string name)
{
    str = str.Substring(0, str.Length - 1);

    string sql = "update  tbOBCustList set assign_dt=getdate(), id_cro='" + name + "'" + "  where id in(" + str + ")";

    int result = SqlHelper.SqlHelper.ExecuteNonQuery(BnbCRM.DAL.Connstring.ConnStr, CommandType.Text, sql);
    if (result> 0)
    {
        Page.ClientScript.RegisterStartupScript(GetType(), "", "<script>alert('分配成功,系統會自動重新整理資料！')</script>");

    }
    else
    {
        Page.ClientScript.RegisterStartupScript(GetType(), "", "<script>alert('分配失敗！')</script>");

    }

    Button1_Click(null, null);
}