ASP.Net Web Form RangeValidator

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ASP.NET RangeValidator Control

This validator evaluates the value of an input control to check that the value lies between specified ranges.

It allows us to check whether the user input is between a specified upper and lower boundary. This range can be numbers, alphabetic characters and dates.

Note: if the input control is empty, no validation will be performed.

The ControlToValidateproperty is used to specify the control to validate. The MinimumValue and MaximumValue properties are used to set minimum and maximum boundaries for the control.

RangeValidator Properties

Property	Description
AccessKey	It is used to set keyboard shortcut for the control.
TabIndex	The tab order of the control.
BackColor	It is used to set background color of the control.
BorderColor	It is used to set border color of the control.
BorderWidth	It is used to set width of border of the control.
Font	It is used to set font for the control text.
ForeColor	It is used to set color of the control text.
Text	It is used to set text to be shown for the control.
ToolTip	It displays the text when mouse is over the control.
Visible	To set visibility of control on the form.
Height	It is used to set height of the control.
Width	It is used to set width of the control.
ControlToValidate	It takes ID of control to validate.
ErrorMessage	It is used to display error message when validation failed.
Type	It is used to set datatype of the control value.
MaximumValue	It is used to set upper boundary of the range.
MinimumValue	It is used to set lower boundary of the range.

Example

In the following example, we are using RangeValidator to validate user input in specified range.

// RangeValidator.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RangeValidator.aspx.cs" 
Inherits="asp.netexample.RangeValidator" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style type="text/css">
.auto-style1 {
height: 82px;
        }
.auto-style2 {
width: 100%;
        }
.auto-style3 {
width: 89px;
        }
.auto-style4 {
margin-left: 80px;
        }
</style>
</head>
<body>
<form id="form1" runat="server">
<div class="auto-style1">
<p class="auto-style4">
            Enter value between 100 and 200<br/>
</p>
<table class="auto-style2">
<tr>
<td class="auto-style3">
<asp:Label ID="Label2" runat="server" Text="Enter a value"></asp:Label>
</td>
<td>
<asp:TextBox ID="uesrInput"runat="server"></asp:TextBox>
<asp:RangeValidator ID="RangeValidator1" runat="server" ControlToValidate="uesrInput" 
ErrorMessage="Enter value in specified range" ForeColor="Red" MaximumValue="199" MinimumValue="101" 
SetFocusOnError="True"Type=" Integer"></asp:RangeValidator>
</td>
</tr>
<tr>
<td class="auto-style3">�</td>
<td>
<br/>
<asp:Button ID="Button2" runat="server" Text="Save"/>
</td>
</tr>
</table>
<br/>
<br/>
</div>
</form>
</body>
</html>

Output:

It throws an error message when the input is not in range.

Next TopicASP.NET RegularExpressionValidator

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