Question

I am creating a tempfile using C#.

public partial class frmResults : Form
{
    public static string caseFile = "";

    private void frmResults_Load(object sender, EventArgs e)
    {
        caseFile = CreateTempFiles();
        FileInfo file = new FileInfo(caseFile + ".rpt");

        if (file.Exists)
        {
            try
            {   
                if (fil.Length < 64000000)
                {
                    richTabular.LoadFile(caseFile + ".rpt", RichTextBoxStreamType.PlainText);
                } 
            }
            catch (IOException io)
            {
                MessageBox.Show(io.GetType().Name);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public static string CreateTempFiles()
        {
            string sPath;
            caseFile = Path.GetTempFileName();

            sPath = Path.GetTempPath();
            string workDir = sPath + "\\work\\";
            // create work directory
            if (!Directory.Exists(workDir))
            {
                Directory.CreateDirectory(workDir);
            }
            // create temp file name
            int i = 0;
            string tmpfileprefix = workDir + "Rdp";
            string tmpfilename = "";
            do
            {
                i++;
                tmpfilename = tmpfileprefix + i.ToString("D6");
            } while (File.Exists(tmpfilename + ".rpt"));

            caseFile = tmpfilename;
            return caseFile;
        }
    }
}

Error:fil.Length = 'fil.Length' threw an exception of type 'System.IO.FileNotFoundException'
Could not find file 'C:\Users\sc\AppData\Local\Temp\\work\Rdp000001.rpt'.

Also, if (fil.Exists) returns false.

Answer 1

The error message couldn’t be more clear:

Error:fil.Length = ‘fil.Length’ threw an exception of type ‘System.IO.FileNotFoundException’ Could not find file ‘C:\Users\sc\AppData\Local\Temp\work\Rdp000001.rpt’.

So… it’s not a valid File object, yet you call a method (Length) which requires it to be, so an exception was thrown. Your file doesn’t exist.