AspNet CompareValidator With Date Example

Asp.Net CompareValidator Example to compare dates or textbox values

In this post i'm going to explain how to use CompareValidator to compare different values or dates.

For example We can use comparevalidator to compare values entered in password and confirm password textboxes which needs to be same, and using comparevalidator we don't need to wtite any code to check whether password in both textboxes are equal or not.

I have placed a textbox txtPwd for entering password and another textbox txtRePwd for re entering password.



To configure CompareValidator we need to assign ControlToCompare, ControlToValidate,Operator properties as mentioned below.

HTML SOURCE TO COMPARE PASSWORDS

   1:  <tr>

   2:  <td>Password:</td>

   3:  <td><asp:TextBox ID="txtPwd" runat="server"

   4:                   TextMode="Password">

   5:      </asp:TextBox>

   6:  </td>

   7:  </tr>

   8:  <tr>

   9:  <td>Confirm Password:</td>

  10:  <td><asp:TextBox ID="txtRePwd" runat="server"

  11:                   TextMode="Password">

  12:      </asp:TextBox>

  13:  </td>

  14:  <td>

  15:  <asp:CompareValidator ID="CompareValidator1" 

  16:       runat="server" 

  17:       ControlToCompare="txtRePwd" 

  18:       ControlToValidate="txtPwd" 

  19:       Operator="Equal" 

  20:       ErrorMessage="Password and confirm 

  21:                     password do not match" 

  22:       SetFocusOnError="True">

  23:  </asp:CompareValidator>

  24:  </td>

  25:  </tr>

We can also use comparevalidator to compare or validate dates.
For comparing date we need to define Type property of comparevalidator to Date.

HTML SOURCE TO COMPARE DATES

   1:  <asp:CompareValidator ID="CompareValidator2" 

   2:       runat="server"

   3:       ControlToCompare="txtLastDate"

   4:       ControlToValidate="txtRegDate" 

   5:       ErrorMessage="Please enter registration 

   6:                     date earlier then last date"

   7:       Operator="LessThanEqual" Type="Date" 

   8:       ValueToCompare="<%= txtLastDate.Text.ToShortString() %>">*

   9:  </asp:CompareValidator>

Hope this helps.

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