Question

Hi i would like to check if a property exists?

This is my code

 string abpath=null;
    var hc= HttpContext.Current.Request.UrlReferrer;
    if (hc.AbsolutePath !=null)
    {
        var _temp = HttpContext.Current.Request.UrlReferrer.AbsolutePath;
        abpath = _temp.ToString();
    }

I would like to Find out if AbsolutePath exists

can any one help me how to check.
right now it throws error as AbsolutePath doesn’t exists to check

Thanks for your time

Answer 1

First you have to map the absolute path (url) to a local file system path. Then you can check whether the file exists:

var localPath = Server.MapPath(hc.AbsolutePath);
var exists = System.IO.File.Exists(localPath);

Update:
I guess I misunderstood the question. The problem is, that if your page/action/etc is called directly (e.g. by entering its URL in the browser), then there is no Referrer (previous page). So you have to first check Request.UrlReferrer for null:

if (hc != null && hc.AbsolutePath != null)
{
  // ...
}

BTW: since AbsolutePath is already a string, there is no need to call ToString()on it. So you can simplify your code some more:

if (hc != null)
{
  abpath = hc.AbsolutePath;
}