C# 向现有 XMLNode 添加属性
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Adding attribute to existing XMLNodes
提问by Nistor Alexandru
Hi I am trying to add an attribut to several tags in an existing xml file.Here is the xml structure:
嗨，我正在尝试向现有 xml 文件中的多个标签添加一个属性。这是 xml 结构：
<Planet>
<Continent ContinentName="Africa">
<Country CountryName="Algeria" />
<Country CountryName="Angola" />
...
</Continent>
<Continent ContinentName="Europe">
<Country CountryName="France" />
<Country CountryName="England" />
...
</Continent>
...
</Planet>
I am trying to add an Id attribut to each of the country tags.Here is my code:
我正在尝试为每个国家/地区标签添加一个 Id 属性。这是我的代码：
public static List<Cities> cities = new List<Cities>();
XmlDocument xDoc = new XmlDocument();
xDoc.Load(@"D:\Projects IDE\Visual Studio\Tutorial\e-commerce\classModeling\GenerateXml file\GenerateXml file\bin\Debug\Planet.xml");
XmlAttribute xKey = xDoc.CreateAttribute("Id");
XmlElement root = xDoc.DocumentElement;
XmlNodeList nodes = root.SelectNodes("//Country");
int count = 0;
foreach( XmlNode node in nodes ) {
string name = node.Attributes["CountryName"].Value;
foreach (var cityObj in cities)
{
xKey.Value = cityObj.cityInitial;
if(name == cityObj.cityName)
{
count++;
node.Attributes.Append(xKey);
Console.WriteLine(count);
}
}
}
xDoc.Save(@"D:\Projects IDE\Visual Studio\Tutorial\e-commerce\classModeling\GenerateXml file\GenerateXml file\bin\Debug\Planets.xml");
The problems is that this code only adds the id to the last element in the XML file. Now at first I tought that's because only one condition is true but then I added a counter and it turns out that that condition is true 179 times.If that is the case why am I getting only one attributt added at the finish?
问题是这段代码只将 id 添加到 XML 文件中的最后一个元素。现在起初我认为这是因为只有一个条件为真，但后来我添加了一个计数器，结果该条件为真 179 次。如果是这样，为什么我在结束时只添加了一个属性？
采纳答案by Teddy
You should place XmlAttribute xKey = xDoc.CreateAttribute("Id");inside the loop
你应该放在XmlAttribute xKey = xDoc.CreateAttribute("Id");循环里面
