从XML文件读取特定文本

Question

I have created a small XML tool which gives me count of specific XML tags from multiple XML files.

The code for this is as follow:

public void SearchMultipleTags()
        {
            if (txtSearchTag.Text != "")
            {
                try
                {
                    //string str = null;
                    //XmlNodeList nodelist;
                    string folderPath = textBox2.Text;
                    DirectoryInfo di = new DirectoryInfo(folderPath);
                    FileInfo[] rgFiles = di.GetFiles("*.xml");
                    foreach (FileInfo fi in rgFiles)
                    {
                        int i = 0;
                        XmlDocument xmldoc = new XmlDocument();
                        xmldoc.Load(fi.FullName);
                        //rtbox2.Text = fi.FullName.ToString();

                        foreach (XmlNode node in xmldoc.GetElementsByTagName(txtSearchTag.Text))
                        {

                            i = i + 1;

                            //
                        }
                        if (i > 0)
                        {
                            rtbox2.Text += DateTime.Now + "\n" + fi.FullName + " \nInstance: " + i.ToString() + "\n\n";

                        }
                        else 
                        {
                            //MessageBox.Show("No Markup Found.");
                        }

                        //rtbox2.Text += fi.FullName + "instances: " + str.ToString();
                    }

                }
                catch (Exception)
                {

                    MessageBox.Show("Invalid Path or Empty File name field.");


                }
            }
            else
            {
                MessageBox.Show("Dont leave field blanks.");
            }

        }

This code returns me the tag counts in Multiple XML files which user wants.

Now the same I want to Search for particular text and its count present in XML files.

Can you suggest the code using XML classes.

Thanks and Regards, Mayur Alaspure

Answer 1

System.Xml.XPath.

Xpath supports counting: count(//nodeName)

If you want to count nodes with specific text, try

count(//*[text()='Hello'])

See How to get count number of SelectedNode with XPath in C#?

By the way, your function should probably look something more like this:

private int SearchMultipleTags(string searchTerm, string folderPath) { ...
      //...
      return i;
}

Answer 2

Use LINQ2XML instead..It's simple and a complete replacement to othe XML API's

XElement doc = XElement.Load(fi.FullName);

//count of specific XML tags
int XmlTagCount=doc.Descendants().Elements(txtSearchTag.Text).Count();

//count particular text

int particularTextCount=doc.Descendants().Elements().Where(x=>x.Value=="text2search").Count();

Answer 3

Try using XPath :

//var document = new XmlDocument();
int count = 0;
var nodes = document.SelectNodes(String.Format(@"//*[text()='{0}']", searchTxt));
if (nodes != null)
    count = nodes.Count;