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 | grmAbay | | Asp.Net User |
| Dynamic control | 5/6/2004 2:56:41 PM |
| 0/0 |   |
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Hello,
I've got a strange thing happening to my website. I am putting controls dynamically on my webpage, depending on user interaction.
The first few times, this works ok. When I come back a day later, some pages don't work anymore and return an error message. I then open my web.config file, do some dummy change, save it, and everything works ok again for a few hours. What's whrong?
This is the error message, it appears exactly where I expected the custom user control:
System.Configuration.ConfigurationException: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS. (c:\inetpub\wwwroot\ZeescheldeBrowser\web.config line 6) at System.Web.Configuration.HttpConfigurationSystem.ComposeConfig(String reqPath, IHttpMapPath configmap) at System.Web.HttpContext.GetCompleteConfigRecord(String reqpath, IHttpMapPath configmap) at System.Web.HttpContext.GetCompleteConfig() at System.Web.HttpContext.GetConfig(String name) at System.Web.UI.CompilationConfiguration.IsBatchingEnabled(HttpContext context) at System.Web.Compilation.PreservedAssemblyEntry.BatchCompileDirectory(HttpContext context, String baseVirtualDir) at System.Web.Compilation.PreservedAssemblyEntry.GetPreservedAssemblyEntry(HttpContext context, String virtualPath, Boolean fApplicationFile) at System.Web.UI.TemplateParser.GetParserCacheItemFromPreservedCompilation() at System.Web.UI.TemplateParser.GetParserCacheItemInternal(Boolean fCreateIfNotFound) at System.Web.UI.TemplateParser.GetParserCacheItemWithNewConfigPath() at System.Web.UI.TemplateParser.GetParserCacheItem() at System.Web.UI.TemplateControlParser.CompileAndGetParserCacheItem(String virtualPath, String inputFile, HttpContext context) at System.Web.UI.TemplateControlParser.GetCompiledType(String virtualPath, String inputFile, HttpContext context) at System.Web.UI.UserControlParser.GetCompiledUserControlType(String virtualPath, String inputFile, HttpContext context) at System.Web.UI.TemplateControl.LoadControl(String virtualPath) at Com.Amecspie.Zeeschelde.Browser.Pages.Main.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\ZeescheldeBrowser\Home\Main.aspx.cs:line 32
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| grmAbay | | Asp.Net User |
| Re: Dynamic control | 5/12/2004 2:09:55 PM |
| 0/0 | |
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Yes, I am adding it to a placeholder's control collection.
This is my aspx page:
<%@ Page language="c#" Codebehind="Main.aspx.cs" AutoEventWireup="false" Inherits="Com.Amecspie.Zeeschelde.Browser.Pages.Main" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML><HEAD>
....
</HEAD>
<body MS_POSITIONING="FlowLayout">
<form id="Main" method="post" runat="server">
<asp:placeholder id="Information" runat="server"></asp:placeholder>
</form>
</body>
</HTML>
This is the Page_Load method from my aspx.cs (code behind)
private void Page_Load(object sender, System.EventArgs e)
{
try
{
//Information is the placeholder where I add the new control
Information.Controls.Clear();
//ControlPath reads the current control to load (relative to the current page)
//If this path doesn't exist, I get an IO exception
UserControl userControl = (UserControl) LoadControl(ControlPath);
//Add the control to the placeholder
Information.Controls.Add(userControl);
}
catch (Exception exc)
{
lblErrorMessage.Text = exc.ToString();
}
}
The usercontrols I load like this are all pretty straightforward, but I don't think it makes any sense to post them here. I don't get to the Init event of these user controls when the exception occurs, so the code doesn't even get interpreted. |
| grmAbay | | Asp.Net User |
| Re: Dynamic control | 5/13/2004 3:03:50 PM |
| 0/0 | |
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I now did a few tests.
I set a breakpoint on my aspx Page_Load event handler at
UserControl userControl = (UserControl) LoadControl(ControlPath);
In my watch window, I added
HttpContext.Current.ApplicationInstance.Server.MapPath(ControlPath)
System.IO.File.Exists(HttpContext.Current.ApplicationInstance.Server.MapPath(ControlPath))
Each time a user control was loaded this way, I could check if the ascx file really existed. No problem. The path was correct, and the File.Existst() always returned true.
Just to remind you:
1) The program works fine for a while. To me this means that the code is not at fault.
2)After a while, it doesn't run anymore for SOME controls. The page_Load of the aspx page gets triggered, the Page_Load of the faulty controls not anymore, because an exception is raised BEFORE the Load event of the control.
3)When I modify my web.config file in a trivial way (removing a parenthesis, then adding it again, then saving the file), the application runs smoothly again. (goto 1 ;-) )
I am at a loss here. I could send you the code like stated above. If you would be so kind as to try it out, that would be great. |
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