Set a file as read-only

Author: Alessio Saltarin

URL: http://www.bytemycode.com/snippets/snippet/311/

Set the read-only attribute of a file to true or false

// Set the read-only attribute of a file to true or false

// <summary>
// Set the attribute read only of a file
// </summary>
// <param name="fullName">Full path of file</param>
// <param name="readOnly">If true, the file will be set readonly. Else will be set writable</param>

public void SetReadOnly(string fullName, bool readOnly)
{
        FileInfo filePath = new FileInfo(fullName);
        try
        {

                if (filePath.Exists)
                {
                        FileAttributes attr;
                        if (readOnly)
                        {
                                attr = (FileAttributes)
                                (filePath.Attributes | FileAttributes.ReadOnly);
                        }
                        else
                        {
                                attr = (FileAttributes)
                                (filePath.Attributes - FileAttributes.ReadOnly);
                        }
                        File.SetAttributes(filePath.FullName, attr);
                }

        }
        catch (IOException e)
        {
                System.Diagnostics.Debug.WriteLine(e.Source);
                System.Diagnostics.Debug.WriteLine(e.Message);
                System.Diagnostics.Debug.WriteLine(e.StackTrace);
        }
}