Sometimes we need to check multiple email id separated by comma using Asp.net regular expression.
Solution is below:
<asp:TextBox ID=”txtEmailAddress” runat=”server” ></asp:TextBox>
<asp:RegularExpressionValidator ID=”RegularExpressionValidator1″ runat=”server” ControlToValidate=”txtEmailAddress”
ErrorMessage=”Invalid email address.” ValidationExpression=”\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*([;]\s*\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*)*”
CssClass=”NormalRed” Display=”Dynamic”></asp:RegularExpressionValidator>
