什么错误“System.Xml.Linq.XDocument'不包含def”是什么意思？

I'm trying to write a code to convert a xml file into a datatable. I'm getting this below error

我正在尝试编写一个代码来将xml文件转换为数据表。我收到以下错误

System.Xml.Linq.XDocument' does not contain a definition for 'DocumentNode' and no extension method 'DocumentNode' accepting a first argument of type 'System.Xml.Linq.XDocument' could be found (are you missing a using directive or an assembly reference?)

System.Xml.Linq.XDocument'不包含'DocumentNode'的定义,也没有可以找到接受类型'System.Xml.Linq.XDocument'的第一个参数的扩展方法'DocumentNode'(你是否缺少using指令或装配参考?)

What am I missing?

我错过了什么?

Below is my code

以下是我的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Xml.XPath;

using System.Xml.Linq;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main()
        {



            var xdoc = System.Xml.Linq.XDocument.Load(filename);
            System.Xml.XmlElement xelRoot = xdoc.DocumentElement;
            System.Xml.XmlNodeList xList = xelRoot.SelectNodes("/rulebase/security/rules/entry");

            int x = 0;
            int y = 0;
            string[] ColumnArray = new string[25];
            string[] RowArray = new string[25];


            foreach (System.Xml.XmlNode pNode in xList)
            {



                if (pNode.ChildNodes.Count = 0)
                {

                }
                else
                {
                    string val1 = "";
                    string nodeVal = "";

                    string nodeName = pNode.name;
                    foreach (System.Xml.XmlNode childNode in pNode.ChildNodes)
                    {
                        val1 = val1 + childNode.value + ", ";
                    }
                    val1 = val1 + " ,";
                    nodeVal = val1.substring(0, val1.length - 3);

                    ColumnArray[x] = nodeName;
                    RowArray[y] = nodeVal;
                    x++;
                    y++;

                }
            }

            System.Data.DataTable table1 = new System.Data.DataTable("entry");

            foreach (string s in ColumnArray)
            {
                table1.Columns.Add(s);
            }

            System.Data.DataRow row;
            row = table1.LoadDataRow(RowArray, true);
        }

    }
}

1 个解决方案

#1

(Initially I didn't understand the comment under the question, so here some details)

(最初我不理解问题下的评论,所以这里有一些细节)

The older System.Xml.XmlDocument has DocumentElement (this is being used in the code ... I don't know where the DocumentNode mentioned in the question comes from).

较旧的System.Xml.XmlDocument具有DocumentElement(这在代码中使用...我不知道问题中提到的DocumentNode来自哪里)。

System.Xml.Linq.XDocument

is the newer LINQ to XML class

是较新的LINQ to XML类

which does not have DocumentElement.

它没有DocumentElement。

e.g. use xdoc.Root.Name to get the name of the root element

例如使用xdoc.Root.Name获取根元素的名称

For more info XMlDocument vs XDocument

有关更多信息XMlDocument vs XDocument

#1