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I am trying to check if a file is on the server with the C# code behind of my ASP.NET web page. I know the file does exist as I put it on the server in a piece of code before hand. Can anyone see why it is not finding the file. This is the code:
wordDocName = "~/specifications/" + Convert.ToInt32(ViewState["projectSelected"]) + ".doc";
ViewState["wordDocName"] = wordDocName;
if (File.Exists(wordDocName))
{
btnDownloadWordDoc.Visible = true;
}
else
{
btnDownloadWordDoc.Visible = false;
}
300
The exists() function is a part of the File class in Java. This function determines whether the is a file or directory denoted by the abstract filename exists or not. The function returns true if the abstract file path exists or else returns false.
Here are a few options: test -e to see if any file exists (directory or regular file), test -f to see if it exists and is a regular file, or test -d to see if it exists and is a directory. This seems to break for paths including $HOME/test or ~/test .
Description. The exists() method of the File object returns a boolean value based on the existence of the file in which it was invoked. If the file exists, the method returns true. It returns false if the file does not exist.
This is a way to see if any XML-files exists in that folder, yes. To check for specific files use File. Exists(path) , which will return a boolean indicating wheter the file at path exists. Noe that this answer returns false if the user does not have permission to read the file.
the file path should be physical not virtual. Use
if (File.Exists(Server.MapPath(wordDocName)))
File.Exists() and probably everything else you want to do with the file will need a real Path.
Your wordDocName is a relative URL.
Simply use
string fileName = Server.MapPath(wordDocName);
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