C# 判斷檔案是否正在被使用

  bool IsFileInUse(string fileName)

        {

            bool inUse = true;

            if (File.Exists(fileName))

            {

                FileStream fs = null;

                try

                {

                    fs = new FileStream(fileName, FileMode.Open, FileAccess.Read,

                    FileShare.None);

                    inUse = false;

                }

                catch

                {

                    // exception....

                }

                finally

                {

                    if (fs != null)

                        fs.Close();

                }

 

                return inUse;//by yl  true表示正在使用,false沒有使用

            }

            else

            {

                return false;//檔案不存在,肯定沒有被使用

 

            }

        }