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Rick

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Asp.net refresh DropDownList

I have an Asp.net page with several DropDownLists.
When the user selects an item from the list, it redirects him to another page.
If the user clicks the browser's back button, the item is still selected in the DropDownList.
How do I make it so that when he goes back to that page, the DropDownList is reset?
Avatar of urir10
urir10

try to add that to your aspx page that has the drop down on it:

<meta http-equiv="expires" content="-1">
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ASKER


Where?

 


<%@ Page Title="" Language="VB" MasterPageFile="~/MasterPage2.master" AutoEventWireup="false" CodeFile="MainPage.aspx.vb" Inherits="_Default" %> 
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" Runat="Server"> 

<table align="center" cellspacing="10" class="style33"> 
<tr> 
<td class="style35"> 
<asp:Image ID="imgCreation" runat="server" ImageAlign="AbsMiddle" 
ImageUrl="~/img/Icons/address-book-2.png" ToolTip="Creation" /> 
&nbsp; Creation</td> 
<td class="style37"> 
<asp:Image ID="imgMaintenance" runat="server" ImageAlign="AbsMiddle" 
ImageUrl="~/img/Icons/under-construction.png" ToolTip="Maintenance" /> 
&nbsp; Maintenance</td> 
</tr> 
<tr> 
<td class="style34"> 
<asp:DropDownList ID="drpCreation" runat="server" AutoPostBack="True" 
Width="450px"> 
</asp:DropDownList> 
</td> 
<td> 
<asp:DropDownList ID="drpMaintenance" runat="server" Width="450px"> 
</asp:DropDownList> 
</td> 
</tr> 
</table> 
<br /> 
<table align="center" cellspacing="10" class="style33"> 
<tr> 
<td class="style35"> 
<asp:Image ID="imgFunding" runat="server" ImageAlign="AbsMiddle" 
ImageUrl="~/img/Icons/calc.png" ToolTip="Funding" /> 
&nbsp; Funding</td> 
<td class="style37"> 
<asp:Image ID="mgDistribution" runat="server" ImageAlign="AbsMiddle" 
ImageUrl="~/img/Icons/anchor.png" ToolTip="Distribution" /> 
&nbsp; Distribution</td> 
</tr> 
<tr> 
<td class="style34"> 
<asp:DropDownList ID="drpFunding" runat="server" Width="450px"> 
</asp:DropDownList> 
</td> 
<td> 
<asp:DropDownList ID="drpDistribution" runat="server" Width="450px"> 
</asp:DropDownList> 
</td> 
</tr> 
</table> 
<br /> 
<br /> 
<table align="center" cellspacing="10" class="style33"> 
<tr> 
<td class="style35"> 
<asp:Image ID="imgInventory" runat="server" ImageAlign="AbsMiddle" 
ImageUrl="~/img/Icons/adress-book.png" ToolTip="Inventory" /> 
&nbsp; Inventory</td> 
<td class="style37"> 
<asp:Image ID="imgReports" runat="server" ImageAlign="AbsMiddle" 
ImageUrl="~/img/Icons/folder-open.png" ToolTip="Reports" /> 
&nbsp; Reports</td> 
</tr> 
<tr> 
<td class="style34"> 
<asp:DropDownList ID="drpInventory" runat="server" Width="450px"> 
</asp:DropDownList> 
</td> 
<td> 
<asp:DropDownList ID="drpReports" runat="server" Width="450px"> 
</asp:DropDownList> 
</td> 
</tr> 
</table> 
<br /> 
<br /> 
<table align="center" cellspacing="10" class="style33"> 
<tr> 
<td class="style35"> 
<asp:Image ID="imgUtilities" runat="server" ImageAlign="AbsMiddle" 
ImageUrl="~/img/Icons/magnet.png" ToolTip="Utilities" /> 
&nbsp; Utilities</td> 
<td class="style37"> 
<asp:Image ID="imgEuJpReports" runat="server" ImageAlign="AbsMiddle" 
ImageUrl="~/img/Icons/folder-open.png" ToolTip="Eu and JP Reports" /> 
&nbsp; Eu and JP Reports</td> 
</tr> 
<tr> 
<td class="style34"> 
<asp:DropDownList ID="drpUtilities" runat="server" Width="450px"> 
</asp:DropDownList> 
</td> 
<td> 
<asp:DropDownList ID="drpEuJpReports" runat="server" Width="450px"> 
</asp:DropDownList> 
</td> 
</tr> 
</table> 
</asp:Content> 
<asp:Content ID="Content3" runat="server" contentplaceholderid="head"> 

<style type="text/css"> 
a {font-family:Arial;} 
a:link {text-decoration: none; color:blue;} 
a:visited {text-decoration: none; color:blue;} 
a:hover {text-decoration: none; color:black} 
a:active {color:black;text-decoration: none} 
.style5 
{ 
margin-left: 24px; 
font-weight: normal; 
} 
.style33 
{ 
width: 910px; 
} 
.style34 
{ 
width: 416px; 
} 
.style35 
{ 
width: 416px; 
font-weight: bold; 
font-family: Arial, Helvetica, sans-serif; 
color: #FFFFFF; 
font-size: large; 
text-align: left; 
background-color: #336699; 
} 
.style37 
{ 
font-family: Arial, Helvetica, sans-serif; 
font-weight: bold; 
color: #FFFFFF; 
font-size: large; 
text-align: left; 
background-color: #336699; 
} 
</style> 
</asp:Content> 
  

  
  
  
  
  

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just under the <%@ Page  tag and before the <asp:Content  tag
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Rick

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