Validera textsträng i C#


<asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>

<asp:RequiredFieldValidator id="rfvEmail" ControlToValidate="txtEmail" ValidationGroup="vgRequestForm" runat="server" Display="Dynamic" ErrorMessage="Email saknas">*</asp:RequiredFieldValidator>


Validera epost i C#


<asp:RegularExpressionValidator runat="server" ID="revEmail" ControlToValidate="txtEmail" ErrorMessage="Ogiltig email" ValidationExpression="[\w\.-]+(\+[\w-]*)?@([\w-]+\.)+[\w-]+" ValidationGroup="vgRequestForm" Display="Dynamic"></asp:RegularExpressionValidator>