On clicking of “Save Name”, it should fire the “Required Field validator” of First Name and Last Name fields only. In the same way, on clicking “Save Address” it should fire the “Required Field validator” only for Address1 and Address2 fields. But in 1.x, when we try to click any of the above button it will fire all the validation controls on the page, like below figure. Also, there is no direct way to prevent this.

Here comes the use of new feature in ASP.Net 2.0 Validation controls called Validation groups. In ASP.Net 2.0, we can see a property called ValidationGroup for every controls that can be validated. We need to set the same validationgroup name for all the controls that needs to be grouped under a same group.

So, our requirement can be achieved by the validation group property in ASP.Net 2.0. The ASPX page will like,

<tr>

  <td style="width: 100px">

  First Name</td>

  <td style="width: 100px">

  <asp:TextBox ID="txtFirstName" runat="server" ValidationGroup="Name_Group"></asp:TextBox></td>

</tr>

<tr>

  <td style="width: 100px">

  </td>

  td style="width: 100px">

  <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtFirstName"

  ErrorMessage="Enter First Name" ValidationGroup="Name_Group" Width="149px"></asp:RequiredFieldValidator></td>

</tr>

<tr>

   <td style="width: 100px">

   Last Name</td>

   <td style="width: 100px">

   <asp:TextBox ID="txtLastName" runat="server" ValidationGroup="Name_group"></asp:TextBox></td>

</tr>

<tr>

   <td style="width: 100px">

   </td>

   <td style="width: 100px">

   <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtLastName"

   ErrorMessage="Enter Last Name" ValidationGroup="Name_Group"Width="152px"></asp:RequiredFieldValidator></td>

</tr>

<tr>

  <td style="width: 100px">

  <td style="width: 100px">

  <asp:Button ID="btnSaveName" runat="server" Text="Save Name" ValidationGroup="Name_Group" /></td>

</tr>

Now,When I click “Save name” the output will be like,

And when I click “Save Address” the out put will be like