将文件从SQL Server保存到C＃中的内存流中＃

Question

我已经将保存在数据库中的文件保存到磁盘上的文件中。我会如何修改它，所以方法返回MemoryStream？

public static void databaseFileRead(string varID, string varPathToNewLocation) { 
     using (var varConnection = Locale.sqlConnectOneTime(Locale.sqlDataConnectionDetailsDZP)) 
     using (var sqlQuery = new SqlCommand(@"SELECT [RaportPlik] FROM [dbo].[Raporty] WHERE [RaportID] = @varID", varConnection)) { 
      sqlQuery.Parameters.AddWithValue("@varID", varID); 
      using (var sqlQueryResult = sqlQuery.ExecuteReader()) { 
       if (sqlQueryResult != null) { 
        sqlQueryResult.Read(); 
        var blob = new Byte[(sqlQueryResult.GetBytes(0, 0, null, 0, int.MaxValue))]; 
        sqlQueryResult.GetBytes(0, 0, blob, 0, blob.Length); 
        using (var fs = new FileStream(varPathToNewLocation, FileMode.Create, FileAccess.Write)) { 
         fs.Write(blob, 0, blob.Length); 
        } 
       } 

      } 
     } 
    } 

Answer 1

将FileStream更改为MemoryStream。在方法的顶层声明流对象，并在返回语句中使用它