如何动态应用验证控件CompareValidator
需求
TextBox1 填入整数
TextBox2 也填入整数
现需要验证 (textBox2 >= TextBox1 * 10%) and (textBox2 <= TextBox1 * 50%)
不知道如何实现？请给指点迷津
you need a CustomValidator, not CompareValidator, something like (you need to use a RegularExpressionValidator to make sure the user enters integers only)
(the example is based on the MSDN documentation for CustomValidator)
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
void ValidateBtn_OnClick(object sender, EventArgs e)
{
// Display whether the page passed validation.
if (Page.IsValid)
{
Message.Text = "Page is valid.";
}
else
{
Message.Text = "Page is not valid!";
}
}
void ServerValidation(object source, ServerValidateEventArgs args)
{
args.IsValid = false;
try
{
int n1 = Convert.ToInt32(TextBox1.Text);
int n2 = Convert.ToInt32(TextBox2.Text);
if ((n2 >= n1*0.1) && (n2 <=n1*0.5))
args.IsValid = true;
}
catch(Exception ex)
{
args.IsValid = false;
}
}
</script>
</head>
<body>
<form runat="server">
<h3>CustomValidator ServerValidate Example</h3>
<asp:Label id="Message"
Text="Enter an even number:"
Font-Name="Verdana"
Font-Size="10pt"
runat="server"/>
<p>
<asp:TextBox id="TextBox1"
runat="server" />
<asp:TextBox id="TextBox2"
runat="server" />
<asp:CustomValidator id="CustomValidator1"
ControlToValidate="TextBox1"
TheOtherControl="TextBox2"
Display="Static"
ErrorMessage="condition not satisfied"
ForeColor="green"
Font-Name="verdana"
Font-Size="10pt"
OnServerValidate="ServerValidation"
ClientValidationFunction="ClientValidate"
runat="server"/>
<p>
<asp:Button id="Button1"
Text="Validate"
OnClick="ValidateBtn_OnClick"
runat="server"/>
</form>
</body>
</html>
<script language="javascript">
function ClientValidate(source, arguments)
{
arguments.IsValid = false;
var n1 = parseInt(arguments.Value);
var n2 = parseInt(document.getElementById(source.TheOtherControl).value);
if ((n2 >= n1 * 0.1) && (n2 <=n1*0.5))
arguments.IsValid = true;
}
</script>
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