SQL數據庫導出使用PowerShell

我正在嘗試導出存儲在遠程SQL Server中的圖像的BLOB數據，並將它們保存到本地機器上的.jpg文件導出文件夾中。任何幫助排除第一個錯誤或幫助我修改工作連接以獲取blob數據並將其轉換爲本地計算機上的.jpgs將非常感激。SQL數據庫導出使用PowerShell

我發現下面的代碼

$Server = "?????"  
$Database = "??????" 
$Dest = "c:\Export\"    
$bufferSize = 8192    

$sqlCommand = " SELECT ID?????1    
     FROM dbo.W?????e; "    

$authentication = "Integrated Security=SSPI;"   
$connectionString = "Provider=sqloledb; " + 
        "Data Source=$dataSource; " + 
        "Initial Catalog=$database; " + 
        "$authentication; " 


$connection = New-Object System.Data.OleDb.OleDbConnection $connectionString 
$command = New-Object System.Data.OleDb.OleDbCommand $sqlCommand,$connection 
$connection.Open() 

$reader = $command.ExecuteReader()    
$out = [array]::CreateInstance('Byte', $bufferSize)    

While ($reader.Read())    
{    
    $fileStream = New-Object System.IO.FileStream ($Dest + $reader.GetString(0)), Create, Write    
    $binaryWriter = New-Object System.IO.BinaryWriter $fileStream    

    $start = 0    
    $received = $reader.GetBytes(1, $start, $out, 0, $bufferSize - 1)    
    While ($received -gt 0)    
    {    
     $binaryWriter.Write($out, 0, $received)    
     $binaryWriter.Flush()    
     $start += $received    
     $received = $reader.GetBytes(1, $start, $out, 0, $bufferSize - 1)    
    }    

    $binaryWriter.Close()    
    $fileStream.Close()    
}    

$fileStream.Dispose()   
$reader.Close()    
$command.Dispose()    
$connection.Close()

運行代碼時收到錯誤。 error

我可以使用此代碼連接到數據庫，但我不明白的streamprocess足以網格代碼做我想做的

$Server = "?????";   # SQL Server Instance.    
$Database = "?????";    
$Dest = "c:\Export\";    # Path to export to.    
$bufferSize = 8192;    # Stream buffer size in bytes.   
    $connString = "data source=?????,1433;Initial catalog=?????;Integrated Security=TRUE;" 
$QueryText = "SELECT ID?????1    
     FROM dbo.W??????e;" 


$SqlConnection = new-object System.Data.SqlClient.SqlConnection 
$SqlConnection.ConnectionString = $connString 
$SqlCommand = $SqlConnection.CreateCommand() 
$SqlCommand.CommandText = $QueryText 

$DataAdapter = new-object System.Data.SqlClient.SqlDataAdapter $SqlCommand 
$dataset = new-object System.Data.Dataset 
$DataAdapter.Fill($dataset) 

$dataset.Tables[0] 

Write-Output ("Finished");

這就是我試圖完成，但我我得到的錯誤將字節轉換爲字符串 HERE

來源

2014-09-05 JoehB.

請將你的錯誤信息複製/粘貼到你的問題中。這樣，它就是Google的索引，並且有相同問題和錯誤消息的人可能會遇到它。 – 2014-09-05 21:08:56

我敢打賭，您的命令超時太短。默認情況下，it is 30 seconds。 Blob通常非常大，如果從數據庫中讀取所有數據超過30秒，我不會感到驚訝。嘗試將超時設置爲真正非常大：

$command.CommandTimeout = [Int32]::MaxValue

來源

2014-09-05 21:07:21

我得到了同樣的錯誤。

將原始代碼讀得離SQL Server名稱更近一點。如果您在本地服務器上執行此操作，則可以使用「。」。作爲服務器名稱。

$ Server =「。」;

來源

2015-08-19 09:14:41 best

SQL數據庫導出使用PowerShell

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