Using (FileStream fs3 =File.Open( "c:\\test.txt", FileMode.Truncate, FileAccess.ReadWrite, FileShare.Read))įileStream is opened for FileAccess.ReadWrite (default) and FileShare.None (default)įileStream is opened for FileAccess.Write FileShare.None (default) and is positioned at the end (because of FileMode.Append)įileStream is opened for FileAccess.ReadWrite FileShare.Read and has had its entire contents truncated (due to FileMode. IByteSize = (smRespStream.Read(downBuffer, 0, downBuffer.FileStream is opened for FileAccess.ReadWrite FileShare.Read and has had its entire contents truncated (due to FileMode.Truncate) : File Access Mode « File Directory Stream « C# / CSharp Tutorial SaveFileStream.Write(downBuffer, 0, iByteSize) IByteSize = (smRespStream.Read(downBuffer, 0, downBuffer.Length)) HwRes = DirectCast(hwRq.GetResponse(), )ĭim iByteSize As Integer Dim downBuffer As Byte() = New Byte(iBufferSize) SaveFileStream = New System.IO.FileStream(sDestinationPath, System.IO.FileMode.Create, System.IO.FileAccess.Write, System.IO.FileShare.ReadWrite)Įnd If Dim hwRq As SaveFileStream = New System.IO.FileStream(sDestinationPath, System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.ReadWrite) ReadWrite, FileShare.ReadWrite) //create byte array.
#Fileshare readwrite how to#
If System.IO.File.Exists(sDestinationPath) Then Dim fINfo As New System.IO.FileInfo(sDestinationPath) Here, you will learn how to use FileInfo class to perform read/write operation on physical files. IBufferSize *= 1000 Dim iExistLen As Long = 0 Dim saveFileStream As System.IO.FileStream
#Fileshare readwrite code#
check if we reached file size to avoid unnecessary download (110% problem) while (existLen 0)Ĭopy Code Dim sSourceURL As String = " " ' source Dim sDestinationPath As String = " " ' file destination Dim iFileSize As Long = 0 Dim iBufferSize As Integer = 1024 The name field in the fileShares section of the results from the instances describe command.
The FILESHARENAME field in the results from the instances list command. Var fileMode = existLen > 0 ? FileMode.Append : FileMode.Create // refactored using ( var saveFileStream = new FileStream(destinationPath, fileMode, FileAccess.Write, FileShare.ReadWrite)) You can get the file share name of an instance from any of following sources: The Filestore instances page in the Google Cloud console. Using (Stream smRespStream = hwRes.GetResponseStream()) // use using to dispose of resources HttpWebResponse hwRes = (HttpWebResponse)hwRq.GetResponse() HttpWebRequest hwRq = ()(DownloadFile.Url) If (existLen >= DownloadFile.Size) // file size is stored the first time only to check if download is necessary Var destinationPath = Path.Combine(DownloadFile.Directory, DownloadFile.Name) įileInfo fINfo = new FileInfo(destinationPath) SaveFileStream.Write(downBuffer, 0, iByteSize) Ĭopy Code private void TryStartDownload() While ((iByteSize = smRespStream.Read(downBuffer, 0, downBuffer.Length)) > 0) SmRespStream = hwRes.GetResponseStream() īyte downBuffer = new byte System.IO.FileMode.Create, System.IO.FileAccess.Write, System.IO.FileMode.Append, System.IO.FileAccess.Write, I was thinking about trying to read/write to the file and if it returns an IOException, I try again a while later. SaveFileStream = new System.IO.FileStream(sDestinationPath, FileStream fs new FileStream('C:\file.dat', FileMode.Open, FileAccess.Read, FileShare.ReadWrite) I'd like to know if anybody had this problem before. New System.IO.FileInfo(sDestinationPath) If (System.IO.File.Exists(sDestinationPath)) The most important point is that in partial downloading, the length is required to add to our HttpWebRequest by the method HttpWebRequest.AddRange(length) which downloads content after the existing length…Ĭopy Code static void DownloadFile( string sSourceURL, string sDestinationPath) For this, we use the FileInfo class from which we check the length of the downloaded content. After that we are required to know how much content has been downloaded already.
If already downloaded, then we create an object of the FileStream class with Append mode otherwise we create an object of FileScream with Create mode. Before we create a request for the file we want to download, we should know if the file which we are going to download has already been downloaded previously or if this is the first request. Add the following code snippet to read data from an Excel file. Include the following namespaces in the Program.cs file. Then add file as a reference to your project. The below code uses the FileStream, HttpWebRequest, and HttpWebResponse classes and their methods. Steps to read data from an Excel file using c: Create a new C console application project. This process uses the HttpWebRequest and HttpWebResponse classes of. Here we will learn how to download a file partially so that the we can download a big file easily in parts. But due to network interruptions, downloading a file is a problem when the size of the file is large. As we all know, downloading a file from a website is done by the click on a link, but if we want to develop an application which downloads a list of files for us, we use a web request to download files.