计算输入控件的值以确定它是否通过自定义的验证逻辑。
|
|---|
<asp:CustomValidator
????AccessKey="string"
????AssociatedControlID="string"
????BackColor="color name|#dddddd"
????BorderColor="color name|#dddddd"
????BorderStyle="NotSet|None|Dotted|Dashed|Solid|Double|Groove|Ridge|
Inset|Outset"
????BorderWidth="size"
????ClientValidationFunction="string"
????ControlToValidate="string"
????CssClass="string"
????Display="None|Static|Dynamic"
????EnableClientScript="True|False"
????Enabled="True|False"
????EnableTheming="True|False"
????EnableViewState="True|False"
????ErrorMessage="string"
????Font-Bold="True|False"
????Font-Italic="True|False"
????Font-Names="string"
????Font-Overline="True|False"
????Font-Size="string|Smaller|Larger|XX-Small|X-Small|Small|Medium|
Large|X-Large|XX-Large"
????Font-Strikeout="True|False"
????Font-Underline="True|False"
????ForeColor="color name|#dddddd"
????Height="size"
????ID="string"
????OnDataBinding="DataBinding event handler"
????OnDisposed="Disposed event handler"
????OnInit="Init event handler"
????OnLoad="Load event handler"
????OnPreRender="PreRender event handler"
????OnServerValidate="ServerValidate event handler"
????OnUnload="Unload event handler"
????runat="server"
????SetFocusOnError="True|False"
????SkinID="string"
????Style="string"
????TabIndex="integer"
????Text="string"
????ToolTip="string"
????ValidateEmptyText="True|False"
????ValidationGroup="string"
????Visible="True|False"
????Width="size"
/> |
备注
示例
下面的代码示例演示如何创建一个用于在服务器上验证在文本框中输入的值是否为偶数的 CustomValidator 控件。验证结果随后显示在页上。
| Visual Basic? |  复制代码 |
|---|
<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
Sub ValidateBtn_OnClick(sender As object, e As EventArgs)
If Page.IsValid Then
lblOutput.Text = "Page is valid."
Else
lblOutput.Text = "Page is not valid!"
End If
End Sub
Sub ServerValidation (source As object, arguments As ServerValidateEventArgs)
Dim num As Integer = Integer.Parse(arguments.Value)
arguments.IsValid = ((num mod 2) = 0)
End Sub
</script>
</head>
<body>
<form runat="server">
<h3>CustomValidator Example</h3>
<asp:Label id=lblOutput runat="server"
Text="Enter an even number:"
Font-Name="Verdana"
Font-Size="10pt" /><br>
<p />
<asp:TextBox id="Text1"
runat="server" />
<asp:CustomValidator id="CustomValidator1"
ControlToValidate="Text1"
OnServerValidate="ServerValidation"
Display="Static"
ErrorMessage="Not an even number!"
ForeColor="green"
Font-Name="verdana"
Font-Size="10pt"
runat="server"/>
<p />
<asp:Button id="Button1"
Text="Validate"
OnClick="ValidateBtn_OnClick"
runat="server"/>
</form>
</body>
</html>
|
| C#? | 复制代码 |
|---|
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
void ValidateBtn_OnClick(object sender, EventArgs e)
{
if (Page.IsValid)
{
lblOutput.Text = "Page is valid.";
}
else
{
lblOutput.Text = "Page is not valid!";
}
}
void ServerValidation (object source, ServerValidateEventArgs arguments)
{
int i = int.Parse(arguments.Value);
arguments.IsValid = ((i%2) == 0);
}
</script>
</head>
<body>
<form runat="server">
<h3>CustomValidator Example</h3>
<asp:Label id=lblOutput runat="server"
Text="Enter an even number:"
Font-Name="Verdana"
Font-Size="10pt" /><br>
<p />
<asp:TextBox id="Text1"
runat="server" />
<asp:CustomValidator id="CustomValidator1"
ControlToValidate="Text1"
OnServerValidate="ServerValidation"
Display="Static"
ErrorMessage="Not an even number!"
ForeColor="green"
Font-Name="verdana"
Font-Size="10pt"
runat="server"/>
<p />
<asp:Button id="Button1"
Text="Validate"
OnClick="ValidateBtn_OnClick"
runat="server"/>
</form>
</body>
</html> |
下面的代码示例仍是说明如何创建一个 CustomValidator 控件，该控件执行的验证例程与上例相同，但执行位置是在客户端上。
| Visual Basic? | 复制代码 |
|---|
<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
Sub ValidateBtn_OnClick(sender As object, e As EventArgs)
If Page.IsValid Then
lblOutput.Text = "Page is valid."
Else
lblOutput.Text = "Page is not valid!"
End If
End Sub
Sub ServerValidation (source As object, arguments As ServerValidateEventArgs)
Dim num As Integer = Integer.Parse(arguments.Value)
arguments.IsValid = ((num mod 2) = 0)
End Sub
</script>
</head>
<body>
<form runat="server">
<h3>CustomValidator Example</h3>
<asp:Label id=lblOutput runat="server"
Text="Enter an even number:"
Font-Name="Verdana"
Font-Size="10pt" /><br>
<p />
<asp:TextBox id="Text1"
runat="server" />
<asp:CustomValidator id="CustomValidator1"
ControlToValidate="Text1"
ClientValidationFunction="ClientValidate"
OnServerValidate="ServerValidation"
Display="Static"
ErrorMessage="Not an even number!"
ForeColor="green"
Font-Name="verdana"
Font-Size="10pt"
runat="server"/>
<p />
<asp:Button id="Button1"
Text="Validate"
OnClick="ValidateBtn_OnClick"
runat="server"/>
</form>
</body>
</html>
<script language="javascript">
<!--
function ClientValidate(source, arguments)
{
if ((arguments.Value % 2) == 0)
arguments.IsValid=true;
else
arguments.IsValid=false;
}
// -->
</script>
|
| C#? | 复制代码 |
|---|
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
void ValidateBtn_OnClick(object sender, EventArgs e)
{
if (Page.IsValid)
{
lblOutput.Text = "Page is valid.";
}
else
{
lblOutput.Text = "Page is not valid!";
}
}
void ServerValidation (object source, ServerValidateEventArgs arguments)
{
int i = int.Parse(arguments.Value);
arguments.IsValid = ((i%2) == 0);
}
</script>
</head>
<body>
<form runat="server">
<h3>CustomValidator Example</h3>
<asp:Label id=lblOutput runat="server"
Text="Enter an even number:"
Font-Name="Verdana"
Font-Size="10pt" /><br>
<p />
<asp:TextBox id="Text1"
runat="server" />
<asp:CustomValidator id="CustomValidator1"
ControlToValidate="Text1"
ClientValidationFunction="ClientValidate"
OnServerValidate="ServerValidation"
Display="Static"
ErrorMessage="Not an even number!"
ForeColor="green"
Font-Name="verdana"
Font-Size="10pt"
runat="server"/>
<p />
<asp:Button id="Button1"
Text="Validate"
OnClick="ValidateBtn_OnClick"
runat="server"/>
</form>
</body>
</html>
<script language="javascript">
<!--
function ClientValidate(source, arguments)
{
if ((arguments.Value % 2) == 0)
arguments.IsValid=true;
else
arguments.IsValid=false;
}
// -->
</script>
|
请参见
警告
注意