/// <summary>
/// See if file can be opened for writing, return error if not
/// </summary>
/// <param name="path"></param>
public static string CanWriteFile(
string path)
{
try
{
if (!SharePointUtil.IsSharePointName(path))
{
bool exists = File.Exists(path);
FileStream fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write);
fs.Close();
if (!exists) // if didn't exist before then delete it
{
try { File.Delete(path); }
catch (Exception ex) { ex = ex; }
}
}
else
{
return(SharePointUtil.CanWriteFile(path));
}
}
catch (Exception ex)
{
return(ex.Message);
}
return("");
}
/// <summary>
/// See if file can be opened for reading, return error message if not
/// </summary>
/// <param name="path"></param>
public static string CanReadFile(
string path)
{
try
{
bool isNormalFilePath = (!SharePointUtil.IsSharePointName(path));
if (isNormalFilePath)
{
FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);
fs.Close();
}
else
{
return(SharePointUtil.CanReadFile(path));
}
}
catch (Exception ex)
{
return(ex.Message);
}
return("");
}
/// <summary>
/// Copy file including SharePoint support
/// </summary>
/// <param name="?"></param>
public static void CopyFile(
string sourceFileName,
string destFileName)
{
if (!SharePointUtil.IsSharePointName(sourceFileName) &&
!SharePointUtil.IsSharePointName(destFileName))
{ // both regular files
File.Copy(sourceFileName, destFileName, true);
}
else if (SharePointUtil.IsSharePointName(sourceFileName) &&
SharePointUtil.IsSharePointName(destFileName))
{ // both SharePoint
string tempFile = TempFile.GetTempFileName();
SharePointUtil.CopyFromSharePoint(sourceFileName, tempFile);
SharePointUtil.CopyToSharePoint(tempFile, destFileName);
File.Delete(tempFile);
}
else if (SharePointUtil.IsSharePointName(sourceFileName)) // source only is SharePoint
{
SharePointUtil.CopyFromSharePoint(sourceFileName, destFileName);
}
else // dest only is SharePoint
{
SharePointUtil.CopyToSharePoint(sourceFileName, destFileName);
}
return;
}
/// <summary>
/// Return true if file exists
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static bool Exists(
string path)
{
if (!SharePointUtil.IsSharePointName(path))
{
if (File.Exists(path))
{
return(true);
}
else
{
return(false);
}
}
else
{
if (Lex.IsNullOrEmpty(SharePointUtil.CanReadFile(path)))
{
return(true);
}
else
{
return(false);
}
}
}
/// <summary>
/// If SharePoint file create a local cached copy of the file that can be read directly
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static string CacheLocalCopyIfSharePointFile(string path)
{
if (!IsSharePointName(path))
{
return(path);
}
string ext = IO.Path.GetExtension(path); // use same extension
string tempFile = TempFile.GetTempFileName(ext);
SharePointUtil.CopyFromSharePoint(path, tempFile);
return(tempFile);
}
/// <summary>
/// Get last write time for file
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static DateTime GetFileLastWriteTime(
string path)
{
if (!SharePointUtil.IsSharePointName(path))
{
if (!File.Exists(path))
{
return(DateTime.MinValue);
}
FileInfo fi = new FileInfo(path);
return(fi.LastWriteTime);
}
else
{
return(SharePointUtil.GetFileUpdateDate(path));
}
}
/// <summary>
/// Get length of file or -1 if doesn't exist
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static long GetFileLength(
string path)
{
if (!SharePointUtil.IsSharePointName(path))
{
if (!File.Exists(path))
{
return(-1);
}
FileInfo fi = new FileInfo(path);
return(fi.Length);
}
else
{
throw new NotSupportedException(path);
}
}