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Make file read-only

Posted on 2006-11-09
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Last Modified: 2010-04-16
Hi i am downloading an excel file in C# and i am using the following:

System.IO.FileStream fs = new System.IO.FileStream("C:\\" + fname, System.IO.FileMode.OpenOrCreate);

Is there a way for me to make the file readonly?
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Question by:joan2006
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6 Comments
 
LVL 8

Assisted Solution

by:redpipe
redpipe earned 250 total points
ID: 17906478
Opening a readonly stream:
FileInfo fi = new FileInfo("c:\myfile.txt");
FileStream s = fi.Open(FileMode.OpenOrCreate, FileAccess.Read);

Making a file readonly:
FileInfo fi = new FileInfo(FileName);
fi.IsReadOnly = true;
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LVL 11

Expert Comment

by:Mihai Stancescu
ID: 17907102
You can try this:

File.SetAttributes("C:\\" + fname, FileAttributes.ReadOnly);


Hope it helps.
Regards,
Mishu
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Author Comment

by:joan2006
ID: 17908088
OK I cant get this to work.   Here is the full view of the code...  Can someone help me determin what needs to be done with the code i have to make the file read only......THanks!

string fname = (string)dr[0];

System.IO.FileMode.OpenOrCreate);
            System.IO.FileStream fs = new System.IO.FileStream("C:\\" + fname, System.IO.FileMode.OpenOrCreate);
            fs.Write((byte[])dr[1], 0, ((byte[])dr[1]).Length);
           
            fs.Flush();
            fs.Close();
            connection.Close();
            Response.Clear();
            Response.ClearContent();
            Response.ClearHeaders();
            Response.ContentType = "application/ms-excel";
            Response.AddHeader("Content-Disposition", "attach;filename=" + fname);
            Response.TransmitFile("C:\\" + fname);
            Response.End();
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LVL 11

Accepted Solution

by:
Mihai Stancescu earned 250 total points
ID: 17908185
After you close the file stream set this:
File.SetAttributes("C:\\" + fname, FileAttributes.ReadOnly);


Regards,
Mishu
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LVL 8

Expert Comment

by:redpipe
ID: 18084206
I see multiple plausible solutions to his problem and since the asker has not made any comment on errors/problems a point-split should be in place
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