public class TextBoxNum: System.Windows.Forms.TextBox {public TextBoxNum () {// // TODO: Add constructor logic here //} protected override void OnKeyPress (System.Windows.Forms.KeyPressEventArgs e) {if ( E.keychar.tostring (). Length == 1) {Switch (E.KEYCHAR) {CASE '0': Case '1': Case '2': Case '3': Case '4': Case '5' : Case '6': Case '8': Case ': Case (Char) System.windows.Forms.keys.Back: // You can extend the validity of other key values E.handled = false Break; Default:
// Other key values are not allowed to be embedded; Break;
}} Base.onkeyPress (e);} protected override void onimemodechanged (eventargs e) {
// Shield input method this.imemode = system.windows.forms.imemode.disable; base.onimemodechanged (e);}
}
