в 15:30, 26 мая 2010

2010-05-26T15:30:47Z

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2010-05-26T11:51:28Z

1 версия

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==asp CustomValidator: validate event function (C#)==



<source lang="csharp">
<%@ Page Language="C#" %>
<script runat="server">
void valProductCode_ServerValidate(Object source, ServerValidateEventArgs args)
{
if (args.Value.Length == 4)
args.IsValid = true;
else
args.IsValid = false;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show Validate Empty Text</title>
</head>
<body>
<form id="form1" runat="server">
<div>

<asp:Label
id="lblProductCode"
Text="Product Code:"
AssociatedControlID="txtProductCode"
Runat="server" />
<br />
<asp:TextBox
id="txtProductCode"
Runat="server" />
<asp:CustomValidator
id="valProductCode"
ControlToValidate="txtProductCode"
Text="(Invalid product code)"
ValidateEmptyText="true"
OnServerValidate="valProductCode_ServerValidate"
Runat="server" />

<br /><br />

<asp:Button
id="btnSubmit"
Text="Submit"
Runat="server" />

</div>
</form>
</body>
</html>

</source>

==asp:CustomValidator validation (VB.net)==



<source lang="csharp">
<%@ Page Language=VB Debug=true %>
<%@ Import Namespace="System.Data" %>
<script runat=server>
Sub ServerValidation9 (source As object, E As ServerValidateEventArgs)
If E.Value mod 9 = 0 Then
E.IsValid = True
Else
E.IsValid = False
End If
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>CustomValidator Control Sample Page</TITLE>
</HEAD>
<BODY >
<form runat="server">
<Font Face="Tahoma">
<BR><BR>
<asp:Label
id="lblMessage"
runat="server"
Font-Bold="True"
Text="Enter a multiple of 9"
/>
<asp:TextBox
id="txt9"
Columns="25"
MaxLength="30"
runat=server
/>
<asp:CustomValidator
id="custom9"
ControlToValidate="txt9"
OnServerValidate="ServerValidation9"
Display="Dynamic"
Font-Name="Verdana"
Font-Bold="True"
Font-Size="10pt"
runat="server">
<BR>You must enter a number that is divisible by 9!
</asp:CustomValidator>
<BR><BR>
<asp:button
id="butOK"
text="OK"
Type="Submit"
runat="server"
/>
</Font>
</Form>
</BODY>
</HTML>

</source>

==Client side and server side validation==



<source lang="csharp">

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default_aspx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<script language="javascript">
function ClientValidator(source, args)
{
if (args.Value % 2 == 0)
args.IsValid=true;
else
args.IsValid=false;
return;
}
</script>
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:TextBox ID="txtValue" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Submit" />  
<asp:CustomValidator
ControlToValidate="txtValue"
ValidateEmptyText=false
ID="CustomValidator1" runat="server"
ClientValidationFunction="ClientValidator"
OnServerValidate="ServerValidator">
Please enter an even number
</asp:CustomValidator>

</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Default_aspx : System.Web.UI.Page
{
protected void ServerValidator(object source, ServerValidateEventArgs e)
{
try
{
int evenNumber = Int32.Parse(e.Value);
if (evenNumber % 2 == 0)
e.IsValid = true;
}
catch (Exception)
{
// error handler here
}
}
}
</source>

==Customvalidator Demo (VB.net)==



<source lang="csharp">
<%@ Page Language="vb" %>
<html>
<head>
<title>Validation Control Example</title>
<script language="javascript">

</script>
<script runat="server">
Sub Page_Load()
vsSummary.DisplayMode = ValidationSummaryDisplayMode.List
End Sub
Sub ServerValidation (source As object, args As ServerValidateEventArgs)
Dim RegExVal As New System.Text.RegularExpressions.Regex("^\d{4}$")
If RegExVal.IsMatch(args.Value) Then
args.IsValid = True
Else
args.IsValid = False
End If
End Sub
</script>
</head>
<body>
<h1>Validation Control Example</h1>
<form runat="server">
<asp:table id="MyTable" border="1" cellpadding="5" cellspacing="0" runat="server">
<asp:tablerow runat="server">
<asp:tablecell runat="server">
CustomValidator Control:
<br><br>
Enter a 4-digit year
</asp:tablecell>
<asp:tablecell runat="server">
<asp:textbox id="year" runat="server"/><br>
<asp:customvalidator id="cvDate"
controltovalidate="year"
errormessage="Not a valid year!"
onservervalidate="servervalidation"
clientvalidationfunction="ClientValidate"
display="dynamic"
runat="server"/>
</asp:tablecell>
</asp:tablerow>
<asp:tablerow runat="server">
<asp:tablecell runat="server">
RangeValidator Control:
<br><br>
Enter an integer between 0 and 100
</asp:tablecell>
<asp:tablecell runat="server">
<asp:textbox id="value" runat="server"/><br>
<asp:rangevalidator id="rvCompare"
controltovalidate="value"
minimumvalue="0"
maximumvalue="100"
type="integer"
errormessage="Value not in valid range!"
runat="server"/>
</asp:tablecell>
</asp:tablerow>

<asp:tablerow runat="server">
<asp:tablecell runat="server">
ValidationSummary Control:
</asp:tablecell>
<asp:tablecell runat="server">
<asp:validationsummary id="vsSummary"
displaymode="bulletlist"
headertext="Page has the following errors: "
showsummary="true"
showmessagebox="false"
runat="server"/>
</asp:tablecell>
</asp:tablerow>
<asp:tablerow runat="server">
<asp:tablecell colspan="2" runat="server">
<asp:button text="submit" runat="server"/>
</asp:tablecell>
</asp:tablerow>
</asp:table>
<asp:label id="MyLabel" runat="server"/>
</form>
</body>
</html>

</source>

==CustomValidator: value length less than 100 (C#)==



<source lang="csharp">
<%@ Page Language="C#" %>
<script runat="server">
void valComments_ServerValidate(Object source, ServerValidateEventArgs args)
{
if (args.Value.Length > 10)
args.IsValid = false;
else
args.IsValid = true;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show CustomValidator</title>
</head>
<body>
<form id="form1" runat="server">
<div>

<asp:Label
id="lblComments"
Text="Comments:"
AssociatedControlID="txtComments"
Runat="server" />
<br />
<asp:TextBox
id="txtComments"
TextMode="MultiLine"
Columns="30"
Rows="5"
Runat="server" />
<asp:CustomValidator
id="valComments"
ControlToValidate="txtComments"
Text="(Comments must be less than 10 characters)"
OnServerValidate="valComments_ServerValidate"
Runat="server" />

<br /><br />

<asp:Button
id="btnSubmit"
Text="Submit"
Runat="server" />

</div>
</form>
</body>
</html>

</source>

==Define your own logic with CustomValidator==



<source lang="csharp">

<%@ Page Language="C#"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<script runat="server" language="C#">
protected void ServerAddMoreValidation(object o, ServerValidateEventArgs e) {
try {
int theInput = Int32.Parse(e.Value);
if (theInput < 0) {
theValidator.ErrorMessage = "please enter a positive value";
}
else {
theValidator.ErrorMessage = "please enter at least " + (theInput + 1).ToString();
}
}
catch {
}
e.IsValid = false;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Target Page</title>
</head>
<body>
<form runat="server">
Enter the quantity:
<asp:textbox runat="server" id="quantity" />
<asp:CustomValidator
runat="server"
id="theValidator"
ControlToValidate="quantity"
OnServerValidate="ServerAddMoreValidation"
ErrorMessage="Try Again"/><br />
<asp:label runat="server" id="theFeedback"/><br />
<asp:button type="submit" runat="server" Text="Submit" />
</form>
</body>
</html>
</source>

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ASP.Net/Validation by Control/CustomValidator - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия