C# 如何在C中读取XML文档对象？

在visual C项目中，我希望将XML文档对象传递给方法。在该方法中，我应该读取存储在XML文档对象中的值。无需创建XML文件

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

谢谢你们的回复，伙计们，我终于得到了我的代码

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

在上面的代码中，我们创建了XML对象，现在我们可以传递XML对象了

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

//Use Following code when assign values to Employee Object
 class employee
   {
    retrivelXMl(XMLDOCUMENT xmlEmployeeobject)
    {
    string NAME;
    int DOB;
            XmlNodeList xmlEmployees = xmlEmployeeobject.SelectNodes("//Employee");
             foreach (XmlElement Employee in xmlEmployees)
             {
             NAME = Employee.GetAttribute("Name"));
             DOB   = int.parse(Employee.GetAttribute("DOB"));      
             }
    }
   }

可以使用XmlNodeReader访问XmlDocument中的元素

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

根据您对XmlDocument内容的处理方式，XmlNodeReader可能不够。 通过您提供的少量信息，我添加了一些通用代码，说明如何从使用XmlNodeReader开始访问XmlDocument

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

如果您在问题中添加更多细节，说明您正试图实现的目标，我们可能会为您提供更适合您需求的答案

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

public void WriteXmlDocument(XmlDocument document)
{
    if (document == null)
    {
        throw new ArgumentNullException("document");
    }

    using (XmlNodeReader nodeReader = new XmlNodeReader(document))
    {
        while (nodeReader.Read())
        {
            Console.WriteLine(nodeReader.Value);
        }
    };
}

-编辑-

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

详细介绍XmlNodeReader的可能性。还可以选择特定节点并对其进行处理

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

使用，您还可以访问下面的特定节点值

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

XmlNode specificNode = document.SelectSingleNode("/NodeName/ChildNodeName");

if (specificNode != null)
{
    XmlNodeReader specificNodeReader = new XmlNodeReader(specificNode);

    while (specificNodeReader.Read())
    {
        Console.WriteLine(specificNodeReader.Value);
    }
}

---

示例将这些节点值写入控制台，但是，您可以将其更改为将值写入变量。灵活性是存在的。

我喜欢使用XmlTextReader和XmlTextWriter。它们很容易使用

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

参见链接

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

编辑

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

从XmlDocument使用

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

XmlTextReader xmlTextReader = new XmlTextReader(new StringReader(xmlDocument.OuterXml));

如果要使用验证，请使用

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }

XmlValidatingReader xmlValidatingReader = new XmlValidatingReader(xmlTextReader);

---

你试过看LINQ to XML吗？

你能准确地解释一下你在做你所描述的事情时遇到了什么问题吗？哈哈……显然我不是唯一一个被caps惹恼的人。发布一些代码，或者尝试一个解决方案，这样我们就可以看到你已经尝试和放弃了什么。谢谢。是的，我先研究过这些的用途。虽然我找不到一种方法来初始化XmlTextWriter而不引用实际的Xml文件、TextWriter或其他文件，但我认为OP没有实际的Xml文件可用，而内存中只有一个XmlDocument对象。我也无法从XmlDocument对象生成XmlTextReader。我查看了您发布的链接，在示例中，就我所见，作者总是使用物理XML文件。我认为OPs的问题是，他只能访问XmlDocument对象，不想使用实际的XML文件。实例化XmlTextReader的好方法。在这一点上，我根本没有考虑过验证。漂亮的接球+1；是的，您是正确的，XmlNodeReader似乎不支持模式验证或文档类型定义DTD。

    //use following code when assign values to XMlDocument
         XMLOBJECT()
             {
                XmlDocument xmlEmployee = new XmlDocument();
                XmlElement xmlRoot =  xmlEmployee.CreateElement("HR");
                XmlElement xmlEmployees = xmlEmployee.CreateElement("Employee");
                xmlEmployees.SetAttribute("Name", "XYZ");
                xmlEmployees.SetAttribute("DOB", "12/12/2010");
                xmlRoot.AppendChild(xmlEmployees);
                xmlEmployee.AppendChild(xmlRoot);
                Employee Emp=new EMployee();
                Emp.retriveXMl(xmlEmployee);
              }