How to obtain the control in the emptydatatemplate of the gridview in. Net C #

Today, I wrote a page for entering a bank account. Currently, only one bank account can be entered by one user.

Drag a gridview to the page. When there is no data, the added textbox is displayed in the emptydatatemplate. However, unlike footertemplate, emptydatatemplate can directly
Textbox bankcard = gridview1.footerrow. findcontrol ("bankcard") as textbox;
.

After studying the problem, we can find a solution. Here we will post it to friends who need it.

Protected void bankcardaddbutton_click (Object sender, eventargs E)
{
Table gridviewtable = (table) gridview1.controls [0]);
String bankcard = (textbox) gridviewtable. Rows [0]. findcontrol ("bankcard"). text;
Response. Write (bankcard );
}