File rename using IIS express

See more:

FileIO

I have utility to rename a file in a specified directory using a certain condition. Running the code using a console application works well and the file is renamed appropriatelty. However when i attempt the same in a web application the file is not getting renamed. I am using VS2017 Development Server for the web application debug.

What am i missing?

Using the console application code as below the file successfully gets renamed :

Rename method:

public static string AddSuffix(string filename, string suffix)
       {
           string fDir = Path.GetDirectoryName(filename);
           string fName = Path.GetFileNameWithoutExtension(filename);
           string fExt = Path.GetExtension(filename);
           string renamedFilePath= Path.Combine(fDir, String.Concat(fName, suffix, fExt));
           return renamedFilePath;
       }

Usage in working main program:

<pre>static void Main(string[] args)
        {
		 string batchperiod = "_70_";
            string realPath = @"C:\Users\myuser\source\repos\Solution\Project\BatchIn";
            IEnumerable<string> fileList = Directory.EnumerateFiles(realPath);

            var CurrentBatchName = (from file in fileList
                                    let fileName = Path.GetFileName(file)
                                    where fileName.Contains(batchperiod)
                                    select fileName).FirstOrDefault();

            string absolutePath = (@"C:\Users\myuser\source\repos\Solution\Project\BatchIn\" + CurrentBatchName);
            string newPath = Helpers.AddSuffix(absolutePath, String.Format("({0})", Helpers.parameters.IsProcessed));
 
            System.IO.FileInfo fi = new System.IO.FileInfo(absolutePath);
            if (fi.Exists)
            {
                fi.MoveTo(newPath);

            }
}

With this code the file is successfully renamed from

GL_Export_70_201907081058.xml

to

GL_Export_70_201907081058(P).xml

The only difference using web application is that the absolutePath is stored in a Session variable having been derived from a preceding operation/ActionResult :

var absolutePath = (@"C:\Users\myuser\source\repos\Solution\Project\BatchIn\" + CurrentBatchName);
                   files.FileName = CurrentBatchName;
                   Session["AbsoluteBatchPath"] = absolutePath;

and later invoked in another ActionResult as :

var sourceFile = Convert.ToString(Session["AbsoluteBatchPath"]);
                
                string newPath = AddSuffix(sourceFile, String.Format("({0})", parameters.IsProcessed));
              
                System.IO.FileInfo fi = new System.IO.FileInfo(sourceFile);
                 
                if (fi.Exists)
                {
                    // Move file with a new name. Hence renamed. 
                    fi.MoveTo(newPath);
                }

What I have tried:

I have tried using File Move variant but it cannot work with FileInfo class. Anyone to help on why the function is not working in the web application. I suspect it might have something to do with IISExpess that runs with Visual Studio.

Are there any permissions i need to alter at IISExpress level.