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RangeValidator 服务器控件测试输入值是否位于给定的范围内。RangeValidator 使用三个键属性执行验证。ControlToValidate 包含要验证的值。MinimumValue 和 MaximumValue 定义有效范围的最小值和最大值。本例显示如何使用 RangeValidator 控件。
<%@ Page clienttarget=downlevel %>
<html>
<head>
<script language="C#" runat="server">
void Button1_Click(Object sender, EventArgs e) {
rangeValInteger.Validate();
if (rangeValInteger.IsValid) {
lblOutput1.Text = "结果：有效！";
} else {
lblOutput1.Text = "结果：无效！";
}
rangeValDate.Validate();
if (rangeValDate.IsValid) {
lblOutput2.Text = "结果：有效！";
} else {
lblOutput2.Text = "结果：无效！";
}
rangeValString.Validate();
if (rangeValString.IsValid) {
lblOutput3.Text = "结果：有效！";
} else {
lblOutput3.Text = "结果：无效！";
}
if (Page.IsValid) {
lblOutput.Text = "结果：页有效！";
} else {
lblOutput.Text = "结果：页无效！";
}
}
</script>
</head>
<body>
<h3><font face="宋体">RangeValidator 示例</font></h3>
<p>
<form runat="server">
<table bgcolor="#eeeeee" cellpadding=10>
<tr valign="top">
<td>
<h5><font face="宋体">要检查的值:</font></h5>
<asp:TextBox id="txtComp1" runat="server"/>
</td>
<td>
<h5><font face="宋体">数据类型：整型最小值 (1)，最大值 (10)</font></h5>
</td>
<td>
<asp:Label id="lblOutput1" Font-Name="宋体" Font-Size="10.5pt" runat="server" />
</td>
</tr>
<tr valign="top">
<td>
<h5><font face="宋体">要检查的值:</font></h5>
<asp:TextBox id="txtComp2" runat="server"/>
</td>
<td>
<h5><font face="宋体">数据类型：日期最小值 (2000/1/1)，最大值 (2001/1/1)</font></h5>
</td>
<td>
<asp:Label id="lblOutput2" Font-Name="宋体" Font-Size="10.5pt" runat="server" />
</td>
</tr>
<tr valign="top">
<td>
<h5><font face="宋体">要检查的值:</font></h5>
<asp:TextBox id="txtComp3" runat="server"/>
</td>
<td>
<h5><font face="宋体">数据类型：字符串最小值 (Aardvark)，最大值 (Zebra)</font></h5>
</td>
<td>
<asp:Label id="lblOutput3" Font-Name="宋体" Font-Size="10.5pt" runat="server" />
</td>
</tr>
</table>
<asp:Button Text="验证" ID="Button1" onclick="Button1_Click" runat="server" />
<asp:RangeValidator
id="rangeValInteger"
Type="Integer"
ControlToValidate="txtComp1"
MaximumValue="10"
MinimumValue="1"
runat="server"/>
<asp:RangeValidator
id="rangeValDate"
Type="Date"
ControlToValidate="txtComp2"
MaximumValue="2001/1/1"
MinimumValue="2000/1/1"
runat="server"/>
<asp:RangeValidator
id="rangeValString"
Type="String"
ControlToValidate="txtComp3"
MaximumValue="Zebra"
MinimumValue="Aardvark"
runat="server"/>
<br>
<asp:Label id="lblOutput" Font-Name="宋体" Font-Size="10.5pt" runat="server" />
</form>
</body>
</html>
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