Question

这是我的外壳......在VB.net 2010和2013中工作。我有一个动态创建的数据表，我希望尽可能快地将所述数据存入我的SQL Server数据库中的表办法。目前我唯一能够工作的是“插入...”，通过创建sql将每个值插入到每个字段中。我想要的是SqlServer.datatable = onTheFlyDataTable。

我已经逐行尝试了，但我无法让它工作，因为我用于服务器表的SQL是“SELECT * FROM ...”，这显然是只读的。

我所做的运行没有错误，是这样的，但它从未将数据写回SQL Server数据库。我确实运行没有错误，dtTEST作为它的结尾做了包含我添加的所有行 - 它只是没有将它写回数据库。甚至尝试过。接受改变......

Dim sSYSsqlTEST As String = "SELECT * FROM MyDataBaseTable;"
Debug.Print(sSYSsqlTEST)

Dim cmdTEST As SqlCommand = New SqlCommand(sSYSsqlTEST, cNN)
Dim daTEST As SqlDataAdapter = New SqlDataAdapter(cmdTEST)
Dim dsTEST As DataSet = New DataSet
If Not IsNothing(daTEST) Then
    daTEST.Fill(dsTEST, "TEST")
End If
Dim dtTEST As DataTable = dsTEST.Tables("TEST")


For each dr as datarow in myOnTheFlyDataTable
    Dim workRow As DataRow = workTable.NewRow ()
    workRow = dr
    workTable.Rows.Add (workRow)
Next

我正在努力实现的目标是什么？

根据Pradeep的回复，我改变了这个但是我得到“给定的ColumnMapping与源或目标中的任何列都不匹配。 “

Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(cNN)
bulkCopy.DestinationTableName = "dbo." + sCUSTOMER + "_IMPORT"
With bulkCopy.ColumnMappings
    For x As Integer = 0 To iNOfields
    Debug.Print("Column " + x.ToString + " Datatype = " + dtIMPORT.Columns(x).DataType.ToString)
    .Add(dtIMPORT.Columns(x).ColumnName, "[FIELD " + x.ToString + "]")
    Next
End With
Try
    ' Write from the source to the destination.
    bulkCopy.WriteToServer(dtIMPORT)
Catch ex As Exception
    Debug.Print(ex.Message)
    Debug.Print("")
End Try

End Using

Answer 1

如果您只想将DataTable转移到数据库，请使用SqlBulkCopy类。你会获得更好的表现。

请注意，表格结构必须相同。

Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(yourConnection)
    bulkCopy.DestinationTableName = "dbo.YourDataBaseTable" 
    With bulkCopy.ColumnMappings
        .Add("srcColumn1", "destColumn1")
        .Add("srcColumn2", "destColumn2")
        '-- and so on ...

    End With
    Try 
       yourConnection.open()
        ' Write from the source to the destination.
          bulkCopy.WriteToServer (myOnTheFlyDataTable)
       yourConnection.Close()

    Catch ex As Exception
        Console.WriteLine(ex.Message)
    End Try 
End Using

VB.Net SQL Server将数据从动态数据表复制到数据库中

1 个答案: