C# 计算XML中特定的XML节点数
请参见以下XML:C# 计算XML中特定的XML节点数,c#,asp.net,xml,C#,Asp.net,Xml,请参见以下XML: 502 503 517 518 519 522 528 536 702 703 我想动态地从这个xml中获取节点总数(C#)。 我怎么做?有任何示例代码吗?请像这样使用XmlDocument: XmlDocument xmlD = new XmlDocument(); xmlD.Load(Server.MapPath("sample.xml")); XmlNodeList xmlNL = xmlD.GetElementsByTagName("tagName"); xm
502
503
517
518
519
522
528
536
702
703
我想动态地从这个xml中获取节点总数(C#)。
我怎么做?有任何示例代码吗?请像这样使用XmlDocument:
XmlDocument xmlD = new XmlDocument();
xmlD.Load(Server.MapPath("sample.xml"));
XmlNodeList xmlNL = xmlD.GetElementsByTagName("tagName");
xmlNL.Count;
下面是一个计算xml文档中所有
子菜单ID
节点的示例,无需将其加载到内存中:
var nodeCount = 0;
using (var reader = XmlReader.Create("test.xml"))
{
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element &&
reader.Name == "submenuid")
{
nodeCount++;
}
}
}
Console.WriteLine(nodeCount);
或者,如果您更喜欢LINQ而不是XML:
var count = XDocument
.Load("test.xml")
.XPathSelectElements("//submenuid")
.Count();
也可以使用XPath函数“count”。这里有一个例子
XPathDocument doc = new XPathDocument("c:\\test.xml");
int count = (int)doc.CreateNavigator().Evaluate("count(//submenuid)");
下面的代码是查找
XML文档中特定节点的计数
private void browse_Click(object sender, EventArgs e)//file browse button
{
DialogResult result = openFileDialog1.ShowDialog();
if (result == DialogResult.OK)
{
String file = openFileDialog1.FileName;
if (Path.GetExtension(file) != ".xml")
{
MessageBox.Show("Please upload an vaild xml file");
textBox1.Clear();
}
else
{
textBox1.Text = file;
}
}
}
private void CountButton_Click(object sender, EventArgs e)//count button
{
int count = 0;
string element = textBox2.Text;//Enter the node in the textbox
XmlDocument readdoc = new XmlDocument();
readdoc.Load(textBox1.Text);
XmlElement root = readdoc.DocumentElement;
XmlNodeList node = root.GetElementsByTagName(element);
count = node.Count;
MessageBox.Show(string.Format("Count of {0} node in the uploaded xml file is {1}", element, count.ToString()));
}
如果您可以控制xml
string xmlReturn="
<CMP>
<OMP3>
<personmenu>
<submenuid>502</submenuid>
<submenuid>503</submenuid>
</personmenu>
<accountsmenu>
<submenuid>517</submenuid>
<submenuid>518</submenuid>
<submenuid>519</submenuid>
</accountsmenu>
<reportsmenu>
<submenuid>522</submenuid>
<submenuid>528</submenuid>
<submenuid>536</submenuid>
</reportsmenu>
</OMP3>
<AMP3>
<admissionmenu>
<submenuid>702</submenuid>
<submenuid>703</submenuid>
</admissionmenu>
</AMP3>
</CMP>"
XmlDocument xmldoc = new XmlDocument();
xmldoc.LoadXml(xmlReturn);
XmlNodeList nodeListCount=xmldoc.GetElementsByTagName("submenuid");
int nodeCount = nodeListCount.Count;
Console.WriteLine(nodeCount);
string xmlReturn=”
502
503
517
518
519
522
528
536
702
703
"
XmlDocument xmldoc=新的XmlDocument();
LoadXml(xmlReturn);
XmlNodeList nodeListCount=xmldoc.GetElementsByTagName(“子菜单ID”);
int nodeCount=nodeListCount.Count;
控制台写入线(nodeCount);
您希望对哪些节点进行计数?全部计数是什么意思。是否要计算xml文档中的子菜单ID元素或所有元素?这对我来说很有效,但我必须将其转换为两倍。这篇文章发表已经十年了,所以这很可能是2010年以来XML库函数的变化。
string xmlReturn="
<CMP>
<OMP3>
<personmenu>
<submenuid>502</submenuid>
<submenuid>503</submenuid>
</personmenu>
<accountsmenu>
<submenuid>517</submenuid>
<submenuid>518</submenuid>
<submenuid>519</submenuid>
</accountsmenu>
<reportsmenu>
<submenuid>522</submenuid>
<submenuid>528</submenuid>
<submenuid>536</submenuid>
</reportsmenu>
</OMP3>
<AMP3>
<admissionmenu>
<submenuid>702</submenuid>
<submenuid>703</submenuid>
</admissionmenu>
</AMP3>
</CMP>"
XmlDocument xmldoc = new XmlDocument();
xmldoc.LoadXml(xmlReturn);
XmlNodeList nodeListCount=xmldoc.GetElementsByTagName("submenuid");
int nodeCount = nodeListCount.Count;
Console.WriteLine(nodeCount);