Gridview Tip 4: Add full selection for the gridview

<Asp: templatefield headertext = "select all">
<Headertemplate>
<Asp: checkbox id = "checkall" runat = "server" text = "select all"
Autopostback = "true" Oncheckedchanged = "checkall "/>
</Headertemplate>
<Itemtemplate>
<Asp: checkbox id = "check" runat = "server" text = "select"/>
</Itemtemplate>
</ASP: templatefield>

protected void checkall (Object sender, eventargs e)
{< br> checkbox cb = (checkbox) sender;
If (CB. TEXT = "select all")
{< br> foreach (gridviewrow gvr in gvlessons. rows)
{< br> checkbox CB1 = (checkbox) gvr. findcontrol ("check");
cb1.checked = CB. checked;
}< br> }< BR >}< br> Note: refer to the dashboard series tips (Excel export, event, data can be presented in multiple ways, and all data can be selected and deleted.
Thank you for your suggestion.