[英]Insert new XML node using LINQ
XML:1 aaa 2 bbb
碼
var doc = XDocument.Load (Server.MapPath(".") + "\\Questions.config");
var elements = from element in doc.Descendants("Question")
select new
{
Id = element.Element("Id").Value,
Text = element.Element("Text").Value,
Reserver = element.Element("Reserver") != null
};
StringBuilder builder = new StringBuilder();
foreach (var question in elements)
{
builder.AppendLine(question.Id + "-" + question.Text);
}
myTextBox.Text = builder.ToString();
如何將新節點“問題”插入XML文件
你想做這樣的事嗎?
var doc = XDocument.Load (Server.MapPath(".") + "\\Questions.config");
var elements = from element in doc.Descendants("Question")
select new
{
Id = element.Element("Id").Value,
Text = element.Element("Text").Value,
Reserver = element.Element("Reserver") != null
};
StringBuilder builder = new StringBuilder();
foreach (var question in elements)
{
builder.AppendLine(question.Id + "-" + question.Text);
}
myTextBox.Text = builder.ToString();
編輯:如果你想更新每個問題,那么你必須稍微修改上面的代碼。
var elements = from element in doc.Descendants("Question")
select new
{
Id = element.Element("Id"),
Text = element.Element("Text"),
Reserver = element.Element("Reserver")
};
StringBuilder builder = new StringBuilder();
foreach (var question in elements)
{
// Read
builder.AppendLine(question.Id.Value + "-" + question.Text.Value);
// Write
question.Reserver.Value = "True";
}
myTextBox.Text = builder.ToString();
通過這種方式,您不再選擇值,而是選擇XElement,因此您可以修改XML。 還要記住使用XDocument.Save()
保存文件。
目前還不清楚你的問題到底意味着什么,但更新XML文件的基本過程將是:
doc.Save("file.xml")
或類似的東西保存XML文檔 沒有更精確的要求,很難更精確。 但是,如果您想為文檔中的每個Text
節點添加“問題x:”前綴,其中x是問題的ID,您可以編寫如下內容:
var doc = XDocument.Load("file.xml");
var elements = doc.Descendants("Question");
foreach (var question in elements)
{
int id = (int) question.Element("ID");
XElement textElement = question.Element("Text");
textElement.Value = "Question: " + id + " = " + textElement.Value;
}
doc.Save("changed.xml");
或者將每個“aaa”Text元素更改為“kkk”:
var doc = XDocument.Load("file.xml");
var elements = doc.Descendants("Text")
.Where(x => x.Value == "aaa");
foreach (var textElement in elements)
{
textElement.Value = "kkk";
}
doc.Save("changed.xml");
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