A site I developed was getting the error: "A potentially dangerous Request.Path value was detected from the client (&)."
This was due to how Google was indexing the pages on the site. The site is using Friendly URLs (meaning no ?Param= or &Parm=). Then Google appended the following parameters (and other values) to the end of the URL: &ct=ga&cd=.
Since there was no ?Param= .NET saw the &ct=ga&cd= as a hack. This lead me down the path of trapping that error in the Global.asax Application_Error handled. When the "A potentially dangerous Request.Path value was detected from the client (&)." error was thrown I wanted to redirect to the default home page.
The problem was the redirect did not work and the site kept going back to the custom error message page. I then found by setting Server.ClearError() I could redirect to the home page.
void Application_Error(object sender, EventArgs e)
{
//... other code here....
var Message = ex.Message.ToLower();
var RootURL = Common.GetAppPathMasterPages() + "default.aspx";
if (Message.Contains("does not exist") || Message.Contains("potentially dangerous request"))
{
Server.ClearError();
CTX.Response.Redirect(RootURL);
return;
}
}
Push the history forward in the page you want to stop the user from going back to the previous page.
$(function() {
window.history.forward();
});
I needed to get the relative path to an image based on the URL in a static class.
Typically I would just use Page.ResolveClientUrl but that does not work in a class that does not inherit the page object. Here is a snippet of code to cast HttpContext to a Page object.
Webforms: This the code using in ASP.NET Webforms to get the relative URL in a base class
//Get the Full Path based on the page.
//This will return /folder/image.jpg or something like ../folder/image.jpg
HttpContext CTX = HttpContext.Current;
System.Web.UI.Page page = (System.Web.UI.Page)HttpContext.Current.Handler;
var ImageFullPath = page.ResolveClientUrl(folderName + @"/" + imageName);
MVC: This the code using in ASP.NET MVC to get the relative URL in a base class
//Create the Chart and save it
HttpContext CTX = HttpContext.Current;
var ServerPath = CTX.Server.MapPath(ImgTempFolder);
var ImgName = c.makeTmpFile(ServerPath); //This is using ChartDirector. Replace your URL here.
var VPath = VirtualPathUtility.ToAbsolute(ImgTempFolder) + ImgName;
return VPath;