C#:修改xml节点

Question

我有那个xml文件:

<?xml version="1.0" encoding="utf-8"?>
<reminders>
  <reminder>
    <Title>Alarm1</Title>
    <Description>Desc1</Description>
    <Time>03/07/2012 10:11AM</Time>
    <snooze>1</snooze>
    <repeat>None</repeat>
  </reminder>
</reminders>

我想将Alarm1中的innertext修改为另一个值,所以我编写了实际复制整个节点的代码.

        XmlDocument xml = new XmlDocument();

        xml.Load("0.xml");

        XmlNodeList elements = xml.SelectNodes("//reminders");

        foreach (XmlNode element in elements)
        {
            if (element.InnerText == "Alarm1")
            {
                XmlNode newvalue = xml.CreateElement("MODIFIED");
                element.ReplaceChild(newvalue, element);

                xml.Save("0.xml");
            }
        }

然后尝试了另一个代码:

        foreach (XmlElement element in xml.SelectNodes("//reminder"))
        {
            if (element.InnerText == "Alarm1")
            {
                XmlNode newvalue = xml.CreateElement("MODIFIED");
                element.ReplaceChild(newvalue, element);

                xml.Save("0.xml");
            }
        }

但也不起作用....

编辑1:[找出新代码]

        XmlDocument xml = new XmlDocument();

        xml.Load("0.xml");

        foreach (XmlElement element in xml.SelectNodes("//reminder"))
        {
            foreach (XmlElement element1 in element)
            {
                if (element.SelectSingleNode("//Title").InnerText == "Alarm1")
                {
                    XmlNode newvalue = xml.CreateElement("MODIFIED");
                    element.ReplaceChild(newvalue, element1);

                    xml.Save("0.xml");
                }
            }
        }

但它使Alarm1成为了

<MODIFIED />

编辑2:[我解决了它:D]好的,这是我能想出的代码:

        XmlDocument xml = new XmlDocument();

        xml.Load("0.xml");

        foreach (XmlElement element in xml.SelectNodes("//reminder"))
        {
            foreach (XmlElement element1 in element)
            {
                if (element.SelectSingleNode("//Title").InnerText == "Alarm1")
                {
                    MessageBox.Show(element1.InnerText);
                    XmlNode newvalue = xml.CreateElement("Title");
                    newvalue.InnerText = "MODIFIED";
                    element.ReplaceChild(newvalue, element1);

                    xml.Save("0.xml");
                }
            }
        }

我非常感谢你的帮助和感谢.

Answer 1

试试这个:

xml.SelectSingleNode("//reminder/Title").InnerText = "NewValue";

你的foreach行只是循环遍历一个名为"提醒"的元素列表,而不是它的子节点.

查看此xpath教程以获取更多信息:

http://www.w3schools.com/xpath/xpath_intro.asp