Asp.net|asp.net in ASP.net 1.1, for validation class controls, when used, it is cumbersome to encounter some controls that do not need to be validated, that is, there is no choice to validate certain controls, and in ASP.net 2.0, The newly added ValidationGroup property allows you to specify that some controls be validated, as shown in the following example:
<body>
<form runat= "Server" >
<asp:textbox id= "TextBox1" runat= "Server"/>
<asp:requiredfieldvalidator validationgroup= "Group1"
Errortext= "Need to Fill in value!"
Controltovalidate= "TextBox1"
runat= "Server"/>
<asp:textbox id= "TextBox2" runat= "Server"/>
<asp:requiredfieldvalidator validationgroup= "Group2"
Errortext= "Need to Fill in value!"
Controltovalidate= "TextBox2"
runat= "Server"/>
<asp:button text= "Group1" validationgroup= "Group1" runat= "Server"/>
<asp:button text= "Group2" validationgroup= "Group2" runat= "Server"/>
</form>
</body>
