asp.net gridview Select all, deselect, delete selected items __.net

asp.net gridview control Select all, uncheck, delete the implementation of the selected item

1. Add a template column to the GridView control, add a CheckBox control to the column, and add the desired button, as shown in the figure:

2. Select All Events

<span style= "FONT-SIZE:18PX;" >//all
        protected void Btn_all_click (object sender, EventArgs e)
        {for
            (int i = 0; I <= GridView2.Rows.Cou nt-1; i++)
            {
                checkbox cbox = (checkbox) Gridview2.rows[i]. FindControl ("CheckBox1");
                Cbox. Checked = true;
            }
        } </span>

3, Cancel the event

<span style= "FONT-SIZE:18PX;" >//Cancel
        protected void Btn_cancel_click (object sender, EventArgs e)
        {for
            (int i = 0; I <= gridview2.rows . Count-1; i++)
            {
                checkbox cbox = (checkbox) Gridview2.rows[i]. FindControl ("CheckBox1");
                Cbox. Checked = false;
            }
        } </span>

4. Anti-election events

<span style= "FONT-SIZE:18PX;" >//Anti-select
        protected void Btn_others_click (object sender, EventArgs e)
        {for
            (int i = 0; I <= gridview2.rows . Count-1; i++)
            {
                checkbox cbox = (checkbox) Gridview2.rows[i]. FindControl ("CheckBox1");
                if (Cbox. Checked = = True)
                {
                    cbox. Checked = false;
                }
                else
                {
                    Cbox. Checked = true;
                }
            }
        </span>

5. Delete selected items (principle: traverse all the checkbox in the GridView control)

<span style= "FONT-SIZE:18PX;" >//Delete selected
        protected void Btn_del_click (object sender, EventArgs e)
        {for
           
            (int i = 0; I <= gridview2.rows . Count-1; i++)
            {
                checkbox cbox = (checkbox) Gridview2.rows[i]. FindControl ("CheckBox1");
                if (Cbox. Checked==true)
                {
                   //here performs the delete operation
                }
            }
           
        }</span>