GridView内嵌checkbox的全选功能

CODE:

1. Add btn_Click  OnCheckedChanged="selectall()" Event

2. Change AutoPostBack = true;

3.add selectall() in .cs page

public void SelectAll(object sender, System.EventArgs e)
    {
        CheckBox cba = (CheckBox)sender;
        if (cba.ID == "cball")  //"cball" select all checkbox in gridview
        {
            foreach (GridViewRow gvr in GridView1.Rows)
            {
                CheckBox cbs = (CheckBox)gvr.FindControl("cbitem"); // "cbitem" select what you want item.
                cbs.Checked = cba.Checked;
            }
        }
    }