filestream

问题 I have come a across a few different methods for inserting data into SQL Server (For FileStream). What is the best method for inserting the FileStream objects? The main difference between the approaches below being one directly did the insert and the other put in a place holder for the FileStream object. One approach is that they were directly inserting the document via C# through an insert: Link: FileStream con.Open(); string sql = "INSERT INTO MyFsTable VALUES (@fData, @fName, default)";

问题 I am writing a ConfigManager class using Portable Class Libraries. PCL supports StreamReader and StreamWriter classes that I want to use, but the PCL version of those classes do not support passing in a string during construction. PCL also does not support the reader.Close() and writer.Close() . Lastly it doesn't support the FileStream class. So I am looking for an answer to any one of the following questions: How can I get the StreamReader and StreamWriter classes working in a PCL? How can I

问题 I am working an Mp3 streamer. To stream mp3 file from url, I want to use a temporary file. But trying to read and write the same file throws IOException for File.ReadAllBytes because the file is in use. How can I get throught this problem? long pos = 0; string path = pathtothetempfile; MemoryStream ms = new MemoryStream(); FileStream fs = new FileStream(path, FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite); do { bytesRead = responseStream.Read(buffer, 0, buffer.Length); fs.Write

问题 I am trying to add an IFormFile received via a .net core web API to an azure blob storage. These are the properties I have set up: static internal CloudStorageAccount StorageAccount => new CloudStorageAccount(new StorageCredentials(AccountName, AccessKey, AccessKeyName), true); // Create a blob client. static internal CloudBlobClient BlobClient => StorageAccount.CreateCloudBlobClient(); // Get a reference to a container static internal CloudBlobContainer Container(string ContainerName) =>

问题 I'm writing code that deals with a file that uses hashes. I need to read a chunk, then hash it, then write it, then read another chunk, etc. In other words, I need to do a lot of reading and writing. I'm sure this is really simple, but I just wanted to run it by the pros... Is it possible, and acceptable to do something like: BinaryReader br = new BinaryReader (File.OpenRead(path)); BinaryWriter bw = new BinaryWriter (File.OpenWrite(path)); br.dostuff(); bw.dostuff(); I remember running into

问题 I have tried the FILESTREAM feature for MSSQL (2008R2 Data Center) on a local database, to experiment. The real database is running on a server. I have setup the whole FILESTREAM, using this query: /* CREATE FILESTREAM AND FILESTREAM TABLE */ USE [master] GO ALTER DATABASE SenONew ADD FILEGROUP [FileStream] CONTAINS FILESTREAM GO ALTER DATABASE SenONew ADD FILE ( NAME = 'fsSenONew', FILENAME = 'C:\Program Files\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS\MSSQL\DATA\SenONew.ndf' ) TO FILEGROUP

问题 I am trying to put together db design for storing images. Many of you might have had experience designing db to store images and the challenges associated with it. The db might store hundreds of thousands of images eventually. I am planning to use SQL Server 2008 db and entity framework. Planning to use FILESTREAM datatype for storing images. Following is the list of attributes i have considered storing for every image in db. Image Name, Image Type, Image Width, Image Height, Image Horizontal

问题 I am loading an image using OpenFileDialog open = new OpenFileDialog(); After I select the file, "open" is populated with several items, including the path. Now I would like to load the file into a filestream (or something similar) to be sent via a webservice... is this possible? thanks 回答1: You can open the file with FileStream: FileStream file = new FileStream("path to file", FileMode.Open); You can then pass this through to the web service http context Response.OutputStream property. You

问题 How can I create a .csv file implicitly/automatically by using the correct method, add text to that file existing in memory and then convert to in memory data to a byte array? string path = @"C:\test.txt"; File.WriteAllLines(path, GetLines()); byte[] bytes = System.IO.File.ReadAllBytes(path); With that approach I create a file always (good), write into it (good) then close it (bad) then open the file again from a path and read it from the hard disc (bad) How can I improve that? UPDATE One

问题 I have successfully set up FILESTREAM on my SQL 2008 server; however I've noticed that even when I have deleted rows containing FILESTREAM data, the physical data file doesn't seem to get deleted. By the physical file, I mean the file in SQLServer's managed directory with a uniqueidentifer as the filename not the original file added to the dbase. Does anyone know if SQLServer will delete the file eventually? If there are a lot of large files removed from the dbase I'd expect to be able to