添加具有数据类型属性的新XElement

Question

你好，我有一个xml文件:

<?xml version="1.0"?>
<TreeList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Columns>
    <Column>
      <ColumnName>123</ColumnName>
      <ColumnType>Bound</ColumnType>
    </Column>
  </Columns>
  <Nodes>
    <Node Id="0" ParentId="-1">
      <NodeData>
        <Cell xsi:type="xsd:string">Node1</Cell>
      </NodeData>
    </Node>
    <Node Id="1" ParentId="0">
      <NodeData>
        <Cell xsi:type="xsd:string">Node11</Cell>
      </NodeData>
    </Node>
  </Nodes>
</TreeList>

，我需要添加新的XElement:

<Node Id="xx" ParentId="yy">
  <NodeData>
    <Cell xsi:type="xsd:string">NewNode</Cell>
  </NodeData>
</Node>

我的问题是在"xsi:type="xsd:string"部分的XElement。我如何像这样设置XAttribute ?

我试过如下:

    public static void AdNewNode(string filePath, string id, string parentId, string value)
    {
        XElement xml = XElement.Load(filePath);
        XNamespace xsi = "http://www.w3.org/2001/XMLSchema-instance";
        XNamespace xsd = "http://www.w3.org/2001/XMLSchema";
        XAttribute attribute1 = new XAttribute(xsd + "string", string.Empty);
        XAttribute attribute2 = new XAttribute(xsi + "type", attribute1.ToString());
        XElement innerNode = new XElement("NodeData", 
                        new XElement("Cell",attribute2, attribute1, value));
        XElement elemnet = new XElement("Node", new XAttribute("Id", id), new XAttribute("ParentId", parentId), innerNode);
        xml.Add(elemnet);
   }

结果如下:

<Node Id="2" ParentId="1">
  <NodeData>
    <Cell p3:type="p0:string=&quot;&quot;" p4:string="" xmlns:p4="http://www.w3.org/2001/XMLSchema" xmlns:p3="http://www.w3.org/2001/XMLSchema-instance">New Node</Cell>
  </NodeData>
</Node> 

有人能帮帮我吗?

Answer 1

"xsd:string"只是普通的字符串，所以你应该能够像这样构建xsi:type属性:

XNamespace xsi = "http://www.w3.org/2001/XMLSchema-instance";
XAttribute attribute = new XAttribute(xsi+"type", "xsd:string");

然后随意地将attribute添加到它的父元素中:

XElement innerNode = new XElement("NodeData",
                        new XElement("Cell", attribute, value));
XElement elemnet = new XElement("Node", 
                        new XAttribute("Id", id), 
                        new XAttribute("ParentId", parentId), 
                        innerNode);