CompareValidator in asp.net

The CompareValidator control enables you to perform a data type check, like we need to make sure the data a user enters in two fields on an input form is the same, such as when performing password or email verification.

The CompareValidator has six important properties:

• ControlToValidate : The ID of the form field being validated.

• Text : The error message displayed when validation fails.

• Type : The type of value being compared. Possible values are String, Integer, Double, Date, and Currency.

• Operator The type of comparison to perform. Possible values are DataTypeCheck, Equal, GreaterThan, GreaterThanEqual, LessThan, LessThanEqual, and NotEqual.

• ValueToCompare : The fixed value against which to compare.

• ControlToCompare : The ID of a control against which to compare

Code Example :

< asp:TextBox ID="txtPasswd1" runat="server" TextMode="Password" >< /asp:TextBox >< br />
< br />
< asp:Label ID="Label6" runat="server" Text="Re-enter Password" Width="136px" >< /asp:Label >< br / >
< asp:TextBox ID="txtPasswd2" runat="server" TextMode="Password" >< /asp:TextBox >
< asp:CompareValidator ID="CompareValidator1" runat="server" ErrorMessage="Password not match" ControlToCompare="txtPasswd1" ControlToValidate="txtPasswd2" Display="Dynamic" >< /asp:CompareValidator >