ValidationCompareOperator Enum

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Specifies the validation comparison operators used by the CompareValidator control.

public enum class ValidationCompareOperator

public enum ValidationCompareOperator

type ValidationCompareOperator =

Public Enum ValidationCompareOperator

Inheritance: Object

ValueType

Enum
ValidationCompareOperator

Fields

Name	Value	Description
Equal	0	A comparison for equality.
NotEqual	1	A comparison for inequality.
GreaterThan	2	A comparison for greater than.
GreaterThanEqual	3	A comparison for greater than or equal to.
LessThan	4	A comparison for less than.
LessThanEqual	5	A comparison for less than or equal to.
DataTypeCheck	6	A comparison for data type only.

Examples

Important

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ 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>

<%@ Page Language="VB" 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">
 
      Sub Button_Click(sender As Object, e As EventArgs) 
 
         If Page.IsValid Then 
         
            lblOutput.Text = "Result: Valid!"
         
         Else 
         
            lblOutput.Text = "Result: Not valid!"
         
         End If

      End Sub
 
      Sub Operator_Index_Changed(sender As Object, e As EventArgs) 

         Compare1.Operator = CType(ListOperator.SelectedIndex, ValidationCompareOperator)
         Compare1.Validate()

      End Sub

      Sub Type_Index_Changed(sender As Object, e As EventArgs) 

         Compare1.Type = CType(ListType.SelectedIndex, ValidationDataType)
         Compare1.Validate()

      End Sub
 
   </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>

Remarks

The ValidationCompareOperator enumeration represents the comparison operations that can be performed by the CompareValidator control.

Note

Unlike the other operators, DataTypeCheck is a unary operation. Only the data type of the input control being validated is checked. If the ControlToCompare or ValueToCompare properties are set when this operation is used, those values are not checked.

Applies to

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