Cross-page posting

Example code

TextBox: <asp:textbox id="TextBox1" runat="server" />
<asp:RequiredFieldValidator ControlToValidate="TextBox1" EnableClientScript="True"
       text="TextBox content is empty" runat="server" />
...
<osb:SuperButton PostBackUrl="ex_target.aspx" isSubmit="true" CausesValidation="true" Text="Submit" ... />

Download Download this working example.

This textbox should not be empty when submit to the target page:

TextBox:  

Submit to target page