Mega Code Archive
Validate control in code behind in C#
<![CDATA[
<%@ Page language="c#" src="CustomerForm.aspx.cs" AutoEventWireup="false" Inherits="CustomerForm" %>
<HTML>
<body>
<form id="Form1" method="post" runat="server">
<DIV style="BORDER-RIGHT: thin groove; BORDER-TOP: thin groove; FONT-SIZE: x-small; Z-INDEX: 101; LEFT: 16px; BORDER-LEFT: thin groove; WIDTH: 613px; BORDER-BOTTOM: thin groove; FONT-FAMILY: Verdana; POSITION: absolute; TOP: 20px; HEIGHT: 364px; BACKGROUND-COLOR: lightyellow"
ms_positioning="GridLayout">
<asp:TextBox id="txtUserName" style="Z-INDEX: 101; LEFT: 160px; POSITION: absolute; TOP: 16px"
runat="server" Width="152px"></asp:TextBox>
<asp:Label id="Label1" style="Z-INDEX: 102; LEFT: 72px; POSITION: absolute; TOP: 19px" runat="server"
Font-Bold="True">User Name:</asp:Label>
<asp:TextBox id="txtPassword" style="Z-INDEX: 103; LEFT: 160px; POSITION: absolute; TOP: 56px"
runat="server" TextMode="Password" Width="152px"></asp:TextBox>
<asp:Label id="Label2" style="Z-INDEX: 104; LEFT: 80px; POSITION: absolute; TOP: 59px" runat="server"
Font-Bold="True">Password:</asp:Label>
<asp:TextBox id="txtRetype" style="Z-INDEX: 105; LEFT: 160px; POSITION: absolute; TOP: 88px"
runat="server" TextMode="Password" Width="152px"></asp:TextBox>
<asp:Label id="Label3" style="Z-INDEX: 106; LEFT: 13px; POSITION: absolute; TOP: 91px" runat="server"
Font-Bold="True">Password (retype):</asp:Label>
<asp:Label id="Label4" style="Z-INDEX: 107; LEFT: 104px; POSITION: absolute; TOP: 140px" runat="server"
Font-Bold="True">E-mail:</asp:Label>
<asp:TextBox id="txtEmail" style="Z-INDEX: 108; LEFT: 160px; POSITION: absolute; TOP: 136px"
runat="server" Width="152px"></asp:TextBox>
<asp:TextBox id="txtAge" style="Z-INDEX: 109; LEFT: 160px; POSITION: absolute; TOP: 176px" runat="server"
Width="152px"></asp:TextBox>
<asp:Label id="Label5" style="Z-INDEX: 110; LEFT: 117px; POSITION: absolute; TOP: 179px" runat="server"
Width="32px" Height="16px" Font-Bold="True">Age:</asp:Label>
<asp:Label id="Label6" style="Z-INDEX: 111; LEFT: 48px; POSITION: absolute; TOP: 228px" runat="server"
Width="106px" Height="24px" Font-Bold="True">Referrer Code:</asp:Label>
<asp:TextBox id="txtCode" style="Z-INDEX: 112; LEFT: 160px; POSITION: absolute; TOP: 224px" runat="server"
Width="152px"></asp:TextBox>
<asp:RequiredFieldValidator id="vldUserName" style="Z-INDEX: 113; LEFT: 336px; POSITION: absolute; TOP: 18px"
runat="server" ErrorMessage="You must enter a user name." ControlToValidate="txtUserName"></asp:RequiredFieldValidator>
<asp:RequiredFieldValidator id="vldPassword" style="Z-INDEX: 115; LEFT: 336px; POSITION: absolute; TOP: 59px"
runat="server" ErrorMessage="You must enter a password." ControlToValidate="txtPassword"></asp:RequiredFieldValidator>
<asp:CompareValidator id="vldRetype" style="Z-INDEX: 114; LEFT: 336px; POSITION: absolute; TOP: 93px"
runat="server" ErrorMessage="Your password does not match." ControlToCompare="txtPassword" ControlToValidate="txtRetype"></asp:CompareValidator>
<asp:RegularExpressionValidator id="vldEmail" style="Z-INDEX: 117; LEFT: 337px; POSITION: absolute; TOP: 139px"
runat="server" ErrorMessage="This email is missing the @ symbol." ValidationExpression=".+@.+" ControlToValidate="txtEmail"></asp:RegularExpressionValidator>
<asp:RangeValidator id="vldAge" style="Z-INDEX: 116; LEFT: 337px; POSITION: absolute; TOP: 180px" runat="server"
ErrorMessage="This age is not between 0 and 120." Type="Integer" MaximumValue="120" MinimumValue="0"
ControlToValidate="txtAge"></asp:RangeValidator>
<asp:CustomValidator id="vldCode" style="Z-INDEX: 118; LEFT: 337px; POSITION: absolute; TOP: 227px" runat="server"
ErrorMessage="Try a string that starts with 014." ControlToValidate="txtCode" ClientValidationFunction="MyCustomValidation"></asp:CustomValidator>
<asp:Button id="cmdSubmit" style="Z-INDEX: 119; LEFT: 160px; POSITION: absolute; TOP: 304px"
runat="server" Width="120px" Text="Submit"></asp:Button>
<asp:Button id="cmdCancel" style="Z-INDEX: 120; LEFT: 304px; POSITION: absolute; TOP: 304px"
runat="server" Width="121px" Height="24px" Text="Cancel" CausesValidation="False"></asp:Button></DIV>
<asp:Label id="lblMessage" style="Z-INDEX: 102; LEFT: 24px; POSITION: absolute; TOP: 388px"
runat="server" Width="616px" Height="72px"></asp:Label>
</form>
</body>
</HTML>
<%-- CustomerForm.aspx.cs
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
public class CustomerForm : System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox txtUserName;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.TextBox txtPassword;
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.TextBox txtRetype;
protected System.Web.UI.WebControls.Label Label3;
protected System.Web.UI.WebControls.Label Label4;
protected System.Web.UI.WebControls.TextBox txtEmail;
protected System.Web.UI.WebControls.TextBox txtAge;
protected System.Web.UI.WebControls.Label Label5;
protected System.Web.UI.WebControls.Label Label6;
protected System.Web.UI.WebControls.TextBox txtCode;
protected System.Web.UI.WebControls.RequiredFieldValidator vldUserName;
protected System.Web.UI.WebControls.RequiredFieldValidator vldPassword;
protected System.Web.UI.WebControls.CompareValidator vldRetype;
protected System.Web.UI.WebControls.RegularExpressionValidator vldEmail;
protected System.Web.UI.WebControls.RangeValidator vldAge;
protected System.Web.UI.WebControls.CustomValidator vldCode;
protected System.Web.UI.WebControls.Button cmdSubmit;
protected System.Web.UI.WebControls.Button cmdCancel;
protected System.Web.UI.WebControls.Label lblMessage;
private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.vldCode.ServerValidate += new System.Web.UI.WebControls.ServerValidateEventHandler(this.vldCode_ServerValidate);
this.cmdSubmit.Click += new System.EventHandler(this.cmdSubmit_Click);
this.cmdCancel.Click += new System.EventHandler(this.cmdCancel_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void cmdSubmit_Click(object sender, System.EventArgs e)
{
if (!this.IsValid) return;
lblMessage.Text = "This is a valid form.";
}
private void cmdCancel_Click(object sender, System.EventArgs e)
{
lblMessage.Text = "No attempt was made to validate this form.";
}
private void vldCode_ServerValidate(object source, System.Web.UI.WebControls.ServerValidateEventArgs e)
{
try{
int val = Int32.Parse(e.Value.Substring(0, 3));
if (val % 3 == 0){
e.IsValid = true;
}else{
e.IsValid = false;
}
}catch{
e.IsValid = false;
}
}
}
--%>
]]>