VB.Net - 批量将XML插入到现有的SQL Server表

我最近想出了如何使用VB.Net将数据从SQL Server导出为XML。我用三个SQL语句和尺寸的XPath文档根标签添加到出口：VB.Net - 批量将XML插入到现有的SQL Server表

 Dim connectionString As String 
     Dim connection As New SqlConnection 
     Dim command As New SqlCommand() 

     Dim sql = "select * from scheduledata for xml auto, elements " & _ 
     "select * from costdata for xml auto, elements " & _ 
     "select * from csintegrationdata for xml auto, elements " 

     connectionString = "Data Source=(localdb)\v11.0; _ 
     Initial Catalog=localACETest;Integrated Security=True" 
     connection = New SqlConnection(connectionString) 
     connection.Open() 

     command.CommandText = sql 
     command.Connection = connection 
     command.CommandType = CommandType.Text 

     Dim xmlRead As XmlReader = command.ExecuteXmlReader() 

     Dim xp As New XPath.XPathDocument(xmlRead) 
     Dim xn As XPath.XPathNavigator = xp.CreateNavigator() 
     Dim xd As New XmlDocument 
     Dim root As XmlNode = xd.CreateElement("Data") 
     root.InnerXml = xn.OuterXml 
     xd.AppendChild(root) 

     Dim fStream As New FileStream(Directory, FileMode.Create, FileAccess.ReadWrite) 

     xd.Save(fStream) 
     fStream.Close()

我希望能够将此数据重新导入到使用VB的SQL表，但我有有些麻烦。我正在使用的代码是这样的：

 Using sqlconn As New SqlConnection(connectionString) 
      Dim ds As New DataSet() 
      Dim sourcedata As New DataTable() 
      Dim ii As Integer = 0 
      ds.ReadXml("C:\Users\coopere.COOPERE-PC\Desktop\Test.xml") 
      sqlconn.Open() 

      Using bulkcopy As New SqlBulkCopy(sqlconn) 
       sourcedata = ds.Tables(0) 

       bulkcopy.DestinationTableName = "CSIntegrationData" 
       bulkcopy.ColumnMappings.Add("Period", "Period") 
       bulkcopy.ColumnMappings.Add("Program", "Program") 
       bulkcopy.ColumnMappings.Add("CostControlAccount", "CostControlAccount") 
       ... 

       bulkcopy.WriteToServer(sourcedata) 
      End Using 
      sqlconn.Close() 
     End Using

做这件事时，我得到一个错误信息：System.InvalidOperationException：给定的ColumnName“CostControlAccount”不与数据源的任何列匹配。

我相信这样做的原因是因为导出到XML的表格中有一列填满了NULL值，这些值不会在XML中的任何位置上结束。但情况并非总是如此 - 通常情况下，会有价值。

考虑到SqlBulkCopy的列映射无法处理接受空值，我如何在我的导出/导入中处理空值？我也完全开放给不同的路线。

来源

2013-07-23 user

经过大量的挖掘，我发现this link。

作为FOR XML函数的一部分，您可以在末尾使用XSINIL来处理空值。结果XML如下。

select * from TABLENAME for xml auto, elements XSINIL 

<ScheduleWorkPackage xsi:nil="true" />

来源

2013-07-23 19:25:26 user

VB.Net - 批量将XML插入到现有的SQL Server表

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