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Validator Example, source code file validator.aspx
<%@ Page Language="C#" %> <!-- Validator Example Use the RequiredFieldValidator, RangeValidator, and RegularExpressionValidator to validate the input to textboxes before submission --> <script runat="server"> public void btnSubmit_Click(object sender, EventArgs e) { string output = String.Format("Name: {0}; Age: {1}; Gender: {2}; Phone: {3}", txtName.Text, txtAge.Text, txtGender.Text, txtPhone.Text); litInfo.Text = output; } </script> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>Validator Example</title> <link rel="stylesheet" type="text/css" href="../examples.css" /> <style type="text/css"> td { padding: 5px; } .r { text-align: right; } </style> </head> <body> <h2>Validator Example</h2> <p>* = required field</p> <form id="form1" runat="server"> <table> <tr> <td class="r">Name *</td> <td><asp:TextBox ID="txtName" runat="server" CssClass="ctrl" /></td> <td><asp:RequiredFieldValidator ControlToValidate="txtName" runat="server" Display="Static" InitialValue="">Name is a required field </asp:RequiredFieldValidator></td> </tr> <tr> <td class="r">Age</td> <td><asp:TextBox ID="txtAge" runat="server" CssClass="ctrl" /></td> <td><asp:RequiredFieldValidator ControlToValidate="txtAge" runat="server" Display="Static" InitialValue="">Age is a required field </asp:RequiredFieldValidator></td> </tr> <tr> <td class="r">Gender</td> <td><asp:TextBox ID="txtGender" runat="server" CssClass="ctrl" /></td> <td><asp:RegularExpressionValidator runat="server" Display="Static" ControlToValidate="txtGender" ValidationExpression="^F|M$">Gender must be F or M </asp:RegularExpressionValidator></td> </tr> <tr> <td class="r">Phone</td> <td><asp:TextBox ID="txtPhone" runat="server" CssClass="ctrl" /></td> <td><asp:RegularExpressionValidator runat="server" Display="Static" ControlToValidate="txtPhone" ValidationExpression="^\d{3}(-|/)(\d{3})-(\d{4})"> Not a valid phone number </asp:RegularExpressionValidator></td> </tr> <tr> <td> </td> <td><asp:Button ID="btnSubmit" runat="server" Text="Submit" CssClass="ctrl" Width="128px" OnClick="btnSubmit_Click" /></td> </tr> </table> <p><asp:RangeValidator ID="RangeValidator1" Type="Integer" runat="server" ControlToValidate="txtAge" Display="Static" MinimumValue="0" MaximumValue="130" ErrorMessage="Age must be between 0 and 130" /></p> <p><asp:Literal ID="litInfo" runat="server" /></p> </form> </body> </html>