How to write large files to SQL Server FILESTREAM in C#?

To write large files to SQL Server FILESTREAM in C#, you can use the SqlFileStream class. Here's an example of how to use SqlFileStream to write a large file to SQL Server FILESTREAM:

using System.Data.SqlClient;
using System.Data.SqlTypes;
using System.IO;

public static class FileStreamWriter
{
    public static void WriteFileToSqlFileStream(string connectionString, string filePath, string fileName)
    {
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();

            SqlCommand command = connection.CreateCommand();
            command.CommandText = "INSERT INTO MyTable (FileStreamColumn, FileName) " +
                "VALUES (@FileStream, @FileName)";

            SqlParameter fileStreamParam = new SqlParameter("@FileStream", SqlDbType.VarBinaryMax);
            SqlParameter fileNameParam = new SqlParameter("@FileName", SqlDbType.NVarChar, 256);

            command.Parameters.Add(fileStreamParam);
            command.Parameters.Add(fileNameParam);

            SqlTransaction transaction = connection.BeginTransaction();

            command.Transaction = transaction;

            try
            {
                SqlFileStream fileStream = new SqlFileStream(fileName, fileStreamParam.Value, FileAccess.Write);
                byte[] buffer = new byte[1024 * 1024];

                using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
                {
                    int bytesRead;

                    while ((bytesRead = fs.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        fileStream.Write(buffer, 0, bytesRead);
                    }
                }

                fileStream.Close();

                fileNameParam.Value = fileName;

                command.ExecuteNonQuery();

                transaction.Commit();
            }
            catch (Exception)
            {
                transaction.Rollback();
                throw;
            }
        }
    }
}

In this example, the WriteFileToSqlFileStream method takes three parameters: the connection string to the SQL Server database, the path to the file to be written to SQL Server FILESTREAM, and the name of the file.

The method opens a connection to the database and creates a new SqlCommand object to insert the file into the database. Two SqlParameter objects are added to the command object to represent the FILESTREAM column and the file name.

A new SqlTransaction object is created to ensure that the entire operation is atomic.

The SqlFileStream object is created by passing in the file name, the FILESTREAM column value, and the FileAccess.Write parameter. This creates a writable stream to the FILESTREAM.

The while loop reads the file into a buffer and writes the buffer to the FILESTREAM. When the end of the file is reached, the FILESTREAM is closed.

The file name and FILESTREAM column value are then added to the SqlCommand object and the command is executed. If the operation is successful, the transaction is committed. If there is an error, the transaction is rolled back.

Note that FILESTREAM requires a specific database configuration and setup. You must ensure that the SQL Server instance is properly configured for FILESTREAM and that the database and table are set up correctly.

Examples

1. C# SQL Server FILESTREAM write large file

   • Description: Learn how to efficiently write large files to SQL Server FILESTREAM using C# for optimized storage and retrieval.

   using System.Data.SqlClient;
   using System.IO;
   
   public void WriteFileToSQLFileStream(string filePath, string connectionString)
   {
       using (var connection = new SqlConnection(connectionString))
       {
           connection.Open();
           using (var transaction = connection.BeginTransaction())
           {
               var cmd = connection.CreateCommand();
               cmd.Transaction = transaction;
               cmd.CommandText = "INSERT INTO MyTable (FileStreamColumn) VALUES (@FileStream)";
   
               // Read file into byte array
               byte[] fileData = File.ReadAllBytes(filePath);
   
               // Add filestream parameter
               cmd.Parameters.Add("@FileStream", System.Data.SqlDbType.VarBinary, -1).Value = fileData;
               
               cmd.ExecuteNonQuery();
               transaction.Commit();
           }
       }
   }
   

2. C# SQL Server FILESTREAM large file upload

   • Description: Understand how to upload large files to SQL Server FILESTREAM using C# to efficiently manage binary data.

   using System.Data.SqlClient;
   using System.IO;
   
   public void UploadLargeFileToSQLFileStream(string filePath, string connectionString)
   {
       using (var connection = new SqlConnection(connectionString))
       {
           connection.Open();
           using (var transaction = connection.BeginTransaction())
           {
               var cmd = connection.CreateCommand();
               cmd.Transaction = transaction;
               cmd.CommandText = "INSERT INTO MyTable (FileStreamColumn) VALUES (@FileStream)";
   
               // Read file in chunks
               using (var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
               {
                   byte[] buffer = new byte[4096];
                   int bytesRead;
                   while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) > 0)
                   {
                       // Add filestream parameter
                       cmd.Parameters.Add("@FileStream", System.Data.SqlDbType.VarBinary, -1).Value = buffer;
                       
                       cmd.ExecuteNonQuery();
                       cmd.Parameters.Clear();
                   }
               }
               
               transaction.Commit();
           }
       }
   }
   

3. C# SQL Server FILESTREAM write large files efficiently

   • Description: Discover efficient techniques to write large files to SQL Server FILESTREAM using C# for improved database performance.

   using System.Data.SqlClient;
   using System.IO;
   
   public void WriteLargeFileToSQLFileStream(string filePath, string connectionString)
   {
       const int ChunkSize = 1024 * 1024; // 1MB chunks
       
       using (var connection = new SqlConnection(connectionString))
       {
           connection.Open();
           using (var transaction = connection.BeginTransaction())
           {
               var cmd = connection.CreateCommand();
               cmd.Transaction = transaction;
               cmd.CommandText = "INSERT INTO MyTable (FileStreamColumn) VALUES (@FileStream)";
   
               // Read file in chunks
               using (var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
               {
                   byte[] buffer = new byte[ChunkSize];
                   int bytesRead;
                   while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) > 0)
                   {
                       // Add filestream parameter
                       cmd.Parameters.Add("@FileStream", System.Data.SqlDbType.VarBinary, -1).Value = buffer;
                       
                       cmd.ExecuteNonQuery();
                       cmd.Parameters.Clear();
                   }
               }
               
               transaction.Commit();
           }
       }
   }
   

4. C# SQL Server FILESTREAM insert large file

   • Description: Insert large files into SQL Server FILESTREAM efficiently using C# to handle binary data storage.

   using System.Data.SqlClient;
   using System.IO;
   
   public void InsertLargeFileToSQLFileStream(string filePath, string connectionString)
   {
       using (var connection = new SqlConnection(connectionString))
       {
           connection.Open();
           using (var transaction = connection.BeginTransaction())
           {
               var cmd = connection.CreateCommand();
               cmd.Transaction = transaction;
               cmd.CommandText = "INSERT INTO MyTable (FileStreamColumn) VALUES (@FileStream)";
   
               // Read file into byte array
               byte[] fileData = File.ReadAllBytes(filePath);
   
               // Add filestream parameter
               cmd.Parameters.Add("@FileStream", System.Data.SqlDbType.VarBinary, -1).Value = fileData;
               
               cmd.ExecuteNonQuery();
               transaction.Commit();
           }
       }
   }
   

5. C# SQL Server FILESTREAM large file streaming

   • Description: Stream large files into SQL Server FILESTREAM using C# to efficiently manage binary data transmission.

   using System.Data.SqlClient;
   using System.IO;
   
   public void StreamLargeFileToSQLFileStream(string filePath, string connectionString)
   {
       using (var connection = new SqlConnection(connectionString))
       {
           connection.Open();
           using (var transaction = connection.BeginTransaction())
           {
               var cmd = connection.CreateCommand();
               cmd.Transaction = transaction;
               cmd.CommandText = "INSERT INTO MyTable (FileStreamColumn) VALUES (@FileStream)";
   
               // Open file stream
               using (var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
               {
                   // Create binary reader
                   using (var reader = new BinaryReader(fileStream))
                   {
                       const int bufferSize = 4096;
                       byte[] buffer = new byte[bufferSize];
                       int bytesRead;
                       
                       // Read and stream file
                       while ((bytesRead = reader.Read(buffer, 0, bufferSize)) > 0)
                       {
                           // Add filestream parameter
                           cmd.Parameters.Add("@FileStream", System.Data.SqlDbType.VarBinary, -1).Value = buffer;
                           
                           cmd.ExecuteNonQuery();
                           cmd.Parameters.Clear();
                       }
                   }
               }
               
               transaction.Commit();
           }
       }
   }
   

6. C# SQL Server FILESTREAM upload large file

   • Description: Upload large files to SQL Server FILESTREAM efficiently using C# to optimize database performance.

   using System.Data.SqlClient;
   using System.IO;
   
   public void UploadLargeFileToSQLFileStream(string filePath, string connectionString)
   {
       using (var connection = new SqlConnection(connectionString))
       {
           connection.Open();
           using (var transaction = connection.BeginTransaction())
           {
               var cmd = connection.CreateCommand();
               cmd.Transaction = transaction;
               cmd.CommandText = "INSERT INTO MyTable (FileStreamColumn) VALUES (@FileStream)";
   
               // Read file into byte array
               byte[] fileData = File.ReadAllBytes(filePath);
   
               // Add filestream parameter
               cmd.Parameters.Add("@FileStream", System.Data.SqlDbType.VarBinary, -1).Value = fileData;
               
               cmd.ExecuteNonQuery();
               transaction.Commit();
           }
       }
   }
   

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