Web Forms :: How To Stop The Browser From Remembering The Wrong Information

Mar 8, 2010

I have a page with some controls and a next button. When the entered information does not match the database values, an error message is displayed.

After seeing the error message, the user enters correct data and clicks next. The code behind the next button makes the error message empty and invisible and goes

to the next page. On the next page the user clicks the browser's back button. The previous page is displayed with the valid data and the error message showing.

I had expected the error message not to be displayed.

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//
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ASPX page is below

<tr>
<td>
</td>
<td>
<asp:Button ID="btnCancel" runat="server" Text="Cancel" PostBackUrl="~/usermodule/Dashboard.aspx" />
<asp:Button ID="btnCreate" runat="server" Text="Create and Preview New PostCard"
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<asp:Button ID="btnshow" runat="server" Style="display: none" />
<cc1:ModalPopupExtender ID="popupProductDetails" runat="server" PopupControlID="pnlPostcard"
BackgroundCssClass="modalBackground" TargetControlID="btnshow" CancelControlID="btnCancelProductDetails" />
</td>
</tr>
<tr>
<td colspan="2">
<asp:Panel ID="pnlPostcard" CssClass="modalPopup" runat="server" Width="80%" Height="80%"
Style="display: none">
<table>
<tr>
<td>
<iframe id="Postcardframe" runat="server" scrolling="yes" width="750px;" height="100%">
</iframe>
</td>
</tr>
<tr>
<td style="text-align: right; width: 10%;">
<asp:Button ID="btnCancelProductDetails" Text="Cancel" runat="server" />
</td>
</tr>
</table>
</asp:Panel>
</td>
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