我不确定我做错了什么,这是错误:'column' argument cannot be null. Parameter name: column
我想附加这个XML文档:
<?xml version="1.0" encoding="UTF-8"?>
<products>
<product>
<Name><![CDATA[G5]]></Name>
<Type><![CDATA[44214]]></Type>
</product>
<product>
<Name><![CDATA[G8]]></Name>
<Type><![CDATA[44]]></Type>
</product>
</products>
到这一个:
<?xml version="1.0" encoding="UTF-8"?>
<products>
<product>
<Name><![CDATA[G5]]></Name>
<Brand><![CDATA[Sim]]></Brand>
<Price><![CDATA[14]]></Price>
<Price><![CDATA[8]]></Price>
</product>
<product>
<Name><![CDATA[G8]]></Name>
<Brand><![CDATA[Sim32]]></Brand>
<Price><![CDATA[143]]></Price>
<Price><![CDATA[84]]></Price>
</product>
</products>
我的最终XML看起来像这样:
<?xml version="1.0" encoding="UTF-8"?>
<products>
<product>
<Name><![CDATA[G5]]></Name>
<Brand><![CDATA[Sim]]></Brand>
<Price><![CDATA[14]]></Price>
<Price><![CDATA[8]]></Price>
<Type><![CDATA[44214]]></Type>
</product>
<product>
<Name><![CDATA[G8]]></Name>
<Brand><![CDATA[Sim32]]></Brand>
<Price><![CDATA[143]]></Price>
<Price><![CDATA[84]]></Price>
<Type><![CDATA[44]]></Type>
</product>
</products>
以下是我正在使用的代码:
Dim objTextReaderOriginal As XmlTextReader = New XmlTextReader("original.xml")
Dim objTextReaderToAppend As XmlTextReader = New XmlTextReader("to_append.xml")
Dim dsOriginal As DataSet = New DataSet()
Dim dsToAppend As DataSet = New DataSet()
dsOriginal.ReadXml(objTextReaderOriginal)
dsToAppend.ReadXml(objTextReaderToAppend)
dsOriginal.Merge(dsToAppend)
dsOriginal.WriteXml("complete.xml")
此行发生错误:dsOriginal.Merge(dsToAppend)