BaseCompareValidator.Type Property
Gets or sets the data type that the values being compared are converted to before the comparison is made.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)
<asp:BaseCompareValidator Type="ValidationDataType" />
Property Value
Type: System.Web.UI.WebControls.ValidationDataTypeOne of the ValidationDataType enumeration values. The default value is String.
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | The specified data type is not one of the ValidationDataType values. |
Use the Type property to specify the data type used for comparison. The Type property is used differently by the various comparison validation controls.
 Important |
|---|
When the Type property is set to Date and the current calendar type is non-Gregorian, the validator performs server-side validation only. The validator client script supports only Gregorian calendars. |
For example, in the RangeValidator control, all values being compared (the upper bound, lower bound, and value of the input control) are converted to the specified data type before any comparison is performed. However, if you use a CompareValidator control and set its Operator property to ValidationCompareOperator.DataTypeCheck, only the value of the input control is converted to the specified data type.
| Note |
|---|
If the value of the input control associated with the validation control cannot be converted to the specified data type, validation fails. The IsValid property of the validation control is set to false. |
The following table lists the values that you can use for the Type property.
Data type | Description |
|---|---|
String | Specifies a string data type. |
Integer | Specifies a 32-bit signed integer data type. |
Double | Specifies a double-precision floating-point number data type. |
Date | Specifies a date data type. |
Currency | Specifies a monetary data type. |
This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins.
The following example demonstrates how to use the Type property to specify the data type that the values being compared are converted to before the comparison is made.
<%@ Page Language="C#" AutoEventWireup="True" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title>CompareValidator Example</title> <script runat="server"> void Button_Click(Object sender, EventArgs e) { if (Page.IsValid) { lblOutput.Text = "Result: Valid!"; } else { lblOutput.Text = "Result: Not valid!"; } } void Operator_Index_Changed(Object sender, EventArgs e) { Compare1.Operator = (ValidationCompareOperator) ListOperator.SelectedIndex; Compare1.Validate(); } void Type_Index_Changed(Object sender, EventArgs e) { Compare1.Type = (ValidationDataType) ListType.SelectedIndex; Compare1.Validate(); } </script> </head> <body> <form id="form1" runat="server"> <h3>CompareValidator Example</h3> <br /> Enter a value in each textbox. Select a comparison operator<br /> and data type. Click "Validate" to compare values. <table style="background-color:#eeeeee; padding:10"> <tr valign="top"> <td> <h5>String 1:</h5> <asp:TextBox id="TextBox1" runat="server"/> </td> <td> <h5>Comparison Operator:</h5> <asp:ListBox id="ListOperator" OnSelectedIndexChanged="Operator_Index_Changed" runat="server"> <asp:ListItem Selected="True" Value="Equal">Equal</asp:ListItem> <asp:ListItem Value="NotEqual">NotEqual</asp:ListItem> <asp:ListItem Value="GreaterThan">GreaterThan</asp:ListItem> <asp:ListItem Value="GreaterThanEqual">GreaterThanEqual</asp:ListItem> <asp:ListItem Value="LessThan">LessThan</asp:ListItem> <asp:ListItem Value="LessThanEqual">LessThanEqual</asp:ListItem> <asp:ListItem Value="DataTypeCheck">DataTypeCheck</asp:ListItem> </asp:ListBox> </td> <td> <h5>String 2:</h5> <asp:TextBox id="TextBox2" runat="server"/> <br /> <asp:Button id="Button1" Text="Validate" OnClick="Button_Click" runat="server"/> </td> </tr> <tr> <td colspan="3" align="center"> <h5>Data Type:</h5> <asp:ListBox id="ListType" OnSelectedIndexChanged="Type_Index_Changed" runat="server"> <asp:ListItem Selected="true" Value="String" >String</asp:ListItem> <asp:ListItem Value="Integer" >Integer</asp:ListItem> <asp:ListItem Value="Double" >Double</asp:ListItem> <asp:ListItem Value="Date" >Date</asp:ListItem> <asp:ListItem Value="Currency" >Currency</asp:ListItem> </asp:ListBox> </td> </tr> </table> <asp:CompareValidator id="Compare1" ControlToValidate="TextBox1" ControlToCompare="TextBox2" EnableClientScript="False" Type="String" runat="server"/> <br /> <asp:Label id="lblOutput" Font-Names="verdana" Font-Size="10pt" runat="server"/> </form> </body> </html>
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
