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<h1>ASP.NET RangeValidator Control</h1>
<hr />
<a href="aspnet_refvalidationcontrols.asp"><img class="navup" src="../images/up.gif" alt="Validation Control Reference" border="0" /> Complete Validation Control Reference</a>
<hr />
<h2>Definition and Usage</h2>
<p>The RangeValidator control is used to check that the user enters an input value that
falls between two values. It is possible to check ranges within
numbers, dates, and characters.</p>
<p><b>Note:</b> The validation will not fail if the input control is empty. Use
the RequiredFieldValidator control to make the field required.</p>
<p><b>Note:</b> The validation will not fail if the input value cannot be
converted to the data type specified. Use the CompareValidator control, with
its Operator property set to ValidationCompareOperator.DataTypeCheck, to verify
the data type of the input value.</p>
<hr />
<h2>Properties</h2>
<table class="ex" border="1" width="100%">
<tr>
<th width="30%" align="left">Property</th>
<th width="70%" align="left">Description</th>
</tr>
<tr>
<td valign="top">BackColor</td>
<td valign="top">The background color of the RangeValidator control</td>
</tr>
<tr>
<td valign="top">ControlToValidate</td>
<td valign="top">The id of the control to validate</td>
</tr>
<tr>
<td valign="top">Display</td>
<td valign="top">The display behavior for the validation control. Legal
values are:<ul>
<li>None (the control is not displayed. Used to
show the error message only in the ValidationSummary control)</li>
<li>Static (the control displays an error message if validation
fails. Space is reserved on the page for the message even if
the input passes validation.</li>
<li>Dynamic (the control displays an error message if
validation fails. Space is not reserved on
the page for the message if the input passes validation</li>
</ul>
</td>
</tr>
<tr>
<td valign="top">EnableClientScript</td>
<td valign="top">A Boolean value that specifies whether client-side
validation is enabled or not</td>
</tr>
<tr>
<td valign="top">Enabled</td>
<td valign="top">A Boolean value that specifies whether the validation
control is enabled or not</td>
</tr>
<tr>
<td valign="top">ErrorMessage</td>
<td valign="top">The text to display in the ValidationSummary control when
validation fails. <b>Note:</b> This text will also be displayed in the
validation control if the Text property is not set</td>
</tr>
<tr>
<td valign="top">ForeColor</td>
<td valign="top">The foreground color of the control</td>
</tr>
<tr>
<td valign="top">id</td>
<td valign="top">A unique id for the control</td>
</tr>
<tr>
<td valign="top">IsValid</td>
<td valign="top">A Boolean value that indicates whether the control
specified by ControlToValidate is determined to be valid</td>
</tr>
<tr>
<td valign="top">MaximumValue</td>
<td valign="top">Specifies the maximum value of the input control</td>
</tr>
<tr>
<td valign="top">MinimumValue</td>
<td valign="top">
<p>Specifies the minimum value of the input control</p>
</td>
</tr>
<tr>
<td valign="top">runat</td>
<td valign="top">Specifies that the control is a server control. Must
be set to "server"</td>
</tr>
<tr>
<td valign="top">Type</td>
<td valign="top">
<p>Specifies the data type of the value to check. The types are:</p>
<ul>
<li>Currency</li>
<li>Date</li>
<li>Double</li>
<li>Integer</li>
<li>String</li>
</ul>
</td>
</tr>
<tr>
<td valign="top">Text</td>
<td valign="top">The message to display when validation fails</td>
</tr>
</table>
<h3>Examples</h3>
<p><a target="_blank" href="showasp.asp@filename=demo_rangevalidator">RangeValidator</a><br />
In this example we declare one TextBox control, one Button control, and one RangeValidator control in an .aspx file. If validation
fails, the text "The date must be between 1/1/2002 and 31/5/2002!" will be
displayed in the RangeValidator control.</p>
<p><a target="_blank" href="showasp.asp@filename=demo_rangevalidator2">RangeValidator 2</a><br />
In this example we declare one TextBox control, one Button control, one Label
control, and one RangeValidator control in an .aspx file. The submit() function checks if the page is valid.
If it is valid, it returns "The page is valid!" in the Label control. If it is not valid, it
returns "The page is not valid!" in the Label control. If validation
fails, the text "The value must be from 1 to 100!" will be displayed in the RangeValidator
control.</p>
<hr />
<a href="aspnet_refvalidationcontrols.asp"><img class="navup" src="../images/up.gif" alt="Validation Control Reference" border="0" /> Complete Validation Control Reference</a>
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