Question

我有以下XML文档：

<People>
  <Person>
    <Name>Dylan</Name>
    <Email>email</Email>
    <Age>4</Age>
  </Person>
  <Person>
    <Name>Name</Name>
    <Email>name</Email>
    <Age>16</Age>
  </Person>
  <Person>
    <Name>ok</Name>
    <Email>name</Email>
    <Age>16</Age>
  </Person>
</People>

这是用于创建文件的代码，希望有所帮助。我试图通过他们的名字选择某个人，并将他们的年龄更新为另一个值。我设法将用户输入的名称与文档中的名称进行比较，但在此之后不知道如何更新年龄。

XmlDocument doc = new XmlDocument();
doc.Load("C:\\Users\\Dylan\\Desktop\\people.xml");
string name = textBox1.Text;
bool correct = false;

foreach (XmlNode node in doc.SelectNodes("//Person"))
{
    string Name = node.SelectSingleNode("Name").InnerText;
    if (Name == name)
    {
        //code to change age
    }
    if (correct == true) break;
 }

这是用于创建文件的代码：

     XmlTextWriter x = new XmlTextWriter("C:\\Users\\Dylan\\Desktop\\people.xml", Encoding.UTF8);
        x.Formatting = Formatting.Indented;
        x.WriteStartElement("People");
        x.WriteStartElement("Person");
        x.WriteStartElement("Name");
        x.WriteString(textBox1.Text);
        x.WriteEndElement();
        x.WriteStartElement("Email");
        x.WriteString(textBox2.Text);
        x.WriteEndElement();
        x.WriteStartElement("Age");
        x.WriteString(numericUpDown1.Value.ToString());
        x.WriteEndElement();
        x.WriteEndElement();
        x.WriteEndElement();
        x.Close();
        MessageBox.Show("Created!");

Answer 1

您应该能够按如下方式更新年龄：

XmlDocument doc = new XmlDocument();
doc.Load("C:\\Users\\Dylan\\Desktop\\people.xml");
string name = textBox1.Text;
bool correct = false;

foreach (XmlNode node in doc.SelectNodes("//Person"))
{
    string Name = node.SelectSingleNode("Name").InnerText;
    if (Name == name)
    {
        // Using the Person node, select the Age node
        XmlNode ageNode = node.SelectSingleNode("Age");

        // Update the value with whatever new value is required
        ageNode.InnerText = "10";
    }

    if (correct == true) break;
}

// Remember to save the changes!
doc.Save("C:\\Users\\Dylan\\Desktop\\people.xml");

在XML中更改单个节点的值

1 个答案: