SqlBulkCopy.DestinationTableName 屬性
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
該伺服器的目的地資料表名稱。
public:
property System::String ^ DestinationTableName { System::String ^ get(); void set(System::String ^ value); };public string DestinationTableName { get; set; }member this.DestinationTableName : string with get, setPublic Property DestinationTableName As String屬性值
DestinationTableName 屬性的字串值；如果未提供任何值，則為 null。
範例
下列主控台應用程式示範如何使用已開啟的連接來大量載入數據。 目的地數據表是 AdventureWorks 資料庫中的數據表。
在此範例中，連接會先用來將數據從 SQL Server 數據表讀取到 SqlDataReader 實例。 源數據不一定位於 SQL Server;您可以使用可讀取至 或載入 至 IDataReaderDataTable的任何數據源。
重要
除非您已如大量複製範例設定中所述建立工作資料表，否則將不會執行此範例。 這個程式碼僅是為了示範使用 SqlBulkCopy 的語法而提供。 如果來源和目的地數據表位於相同的 SQL Server 實例中，使用 Transact-SQL INSERT ... SELECT 語句來複製數據會比較簡單且更快速。
using System.Data.SqlClient;
class Program
{
static void Main()
{
string connectionString = GetConnectionString();
// Open a sourceConnection to the AdventureWorks database.
using (SqlConnection sourceConnection =
new SqlConnection(connectionString))
{
sourceConnection.Open();
// Perform an initial count on the destination table.
SqlCommand commandRowCount = new SqlCommand(
"SELECT COUNT(*) FROM " +
"dbo.BulkCopyDemoMatchingColumns;",
sourceConnection);
long countStart = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Starting row count = {0}", countStart);
// Get data from the source table as a SqlDataReader.
SqlCommand commandSourceData = new SqlCommand(
"SELECT ProductID, Name, " +
"ProductNumber " +
"FROM Production.Product;", sourceConnection);
SqlDataReader reader =
commandSourceData.ExecuteReader();
// Open the destination connection. In the real world you would
// not use SqlBulkCopy to move data from one table to the other
// in the same database. This is for demonstration purposes only.
using (SqlConnection destinationConnection =
new SqlConnection(connectionString))
{
destinationConnection.Open();
// Set up the bulk copy object.
// Note that the column positions in the source
// data reader match the column positions in
// the destination table so there is no need to
// map columns.
using (SqlBulkCopy bulkCopy =
new SqlBulkCopy(destinationConnection))
{
bulkCopy.DestinationTableName =
"dbo.BulkCopyDemoMatchingColumns";
try
{
// Write from the source to the destination.
bulkCopy.WriteToServer(reader);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
// Close the SqlDataReader. The SqlBulkCopy
// object is automatically closed at the end
// of the using block.
reader.Close();
}
}
// Perform a final count on the destination
// table to see how many rows were added.
long countEnd = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Ending row count = {0}", countEnd);
Console.WriteLine("{0} rows were added.", countEnd - countStart);
Console.WriteLine("Press Enter to finish.");
Console.ReadLine();
}
}
}
private static string GetConnectionString()
// To avoid storing the sourceConnection string in your code,
// you can retrieve it from a configuration file.
{
return "Data Source=(local); " +
" Integrated Security=true;" +
"Initial Catalog=AdventureWorks;";
}
}
Imports System.Data.SqlClient
Module Module1
Sub Main()
Dim connectionString As String = GetConnectionString()
' Open a connection to the AdventureWorks database.
Using sourceConnection As SqlConnection = _
New SqlConnection(connectionString)
sourceConnection.Open()
' Perform an initial count on the destination table.
Dim commandRowCount As New SqlCommand( _
"SELECT COUNT(*) FROM dbo.BulkCopyDemoMatchingColumns;", _
sourceConnection)
Dim countStart As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Starting row count = {0}", countStart)
' Get data from the source table as a SqlDataReader.
Dim commandSourceData As SqlCommand = New SqlCommand( _
"SELECT ProductID, Name, ProductNumber " & _
"FROM Production.Product;", sourceConnection)
Dim reader As SqlDataReader = commandSourceData.ExecuteReader
' Open the destination connection. In the real world you would
' not use SqlBulkCopy to move data from one table to the other
' in the same database. This is for demonstration purposes only.
Using destinationConnection As SqlConnection = _
New SqlConnection(connectionString)
destinationConnection.Open()
' Set up the bulk copy object.
' The column positions in the source data reader
' match the column positions in the destination table,
' so there is no need to map columns.
Using bulkCopy As SqlBulkCopy = _
New SqlBulkCopy(destinationConnection)
bulkCopy.DestinationTableName = _
"dbo.BulkCopyDemoMatchingColumns"
Try
' Write from the source to the destination.
bulkCopy.WriteToServer(reader)
Catch ex As Exception
Console.WriteLine(ex.Message)
Finally
' Close the SqlDataReader. The SqlBulkCopy
' object is automatically closed at the end
' of the Using block.
reader.Close()
End Try
End Using
' Perform a final count on the destination table
' to see how many rows were added.
Dim countEnd As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Ending row count = {0}", countEnd)
Console.WriteLine("{0} rows were added.", countEnd - countStart)
Console.WriteLine("Press Enter to finish.")
Console.ReadLine()
End Using
End Using
End Sub
Private Function GetConnectionString() As String
' To avoid storing the sourceConnection string in your code,
' you can retrieve it from a configuration file.
Return "Data Source=(local);" & _
"Integrated Security=true;" & _
"Initial Catalog=AdventureWorks;"
End Function
End Module
備註
如果在 DestinationTableName 呼叫 時 WriteToServer 尚未設定 ， ArgumentNullException 則會擲回 。
如果在 DestinationTableName 作業執行時 WriteToServer 修改 ，則變更不會影響目前的作業。 下次呼叫方法時WriteToServer，會使用新的DestinationTableName值。
DestinationTableName 是三部分名稱 (<database>.<owningschema>.<name>)。 如果您要加以選擇，則可以用該資料表的資料庫和主控結構描述來限定該資料表名稱。 不過，如果數據表名稱使用底線 (“_”) 或任何其他特殊字元，您必須使用括號逸出名稱，如 ([<database>.<owningschema>.<name_01>]) 。 如需詳細資訊，請參閱＜ Database Identifiers＞。
您可以使用 屬性的值，將資料大量複製到暫存表，例如 tempdb..#table 或 tempdb.<owner>.#tableDestinationTableName 。
適用於
另請參閱
- 在 SQL Server 中執行大量複製作業
- ADO.NET 概觀 \(部分機器翻譯\)
