c# - 错误 : "The node to be inserted is from a different document context"

Question

当我调用 XmlNode.AppendChild() 时，出现此错误:

The node to be inserted is from a different document context.

static public XmlNode XMLNewChildNode(XmlNode oParent, string sName, 
    string sNamespaceURI, string sNodeType)
{
    XmlNode oNode = moDoc.CreateNode(sNodeType, sName, sNamespaceURI);
    oParent.AppendChild(oNode);
    return oNode;
}

此代码是从它的 VB 6.0 版本转换而来的(请忽略可选参数，我在 C# 版本中对它们进行了重载):

Public Function XMLNewChildNode(ByVal oParent As IXMLDOMNode, ByVal _
    sName As String, Optional ByVal sNamespaceURI As String = "", _
    Optional ByVal sNodeType As String = "element") As IXMLDOMNode
'**************** DESCRIPTION *******************
  'Create a new Child Node for passed Parent.
'***************** VARIABLES ********************
  Dim oNode As IXMLDOMNode
'************************************************
  Set oNode = moDoc.createNode(sNodeType, sName, sNamespaceURI)
  Call oParent.appendChild(oNode)
  Set XMLNewChildNode = oNode
End Function

为什么 VB 代码可以工作而 C# 不能？ VB 和 C# 处理 XML 的方式是否存在我需要注意的差异？

Answer 1

您需要在附加节点之前将节点导入到文档中:

XmlNode oNode = moDoc.CreateNode(sNodeType, sName, sNamespaceURI);

//necessary for crossing XmlDocument contexts
XmlNode importNode = oParent.OwnerDocument.ImportNode(oNode, true);

oParent.AppendChild(importNode);
return oNode;