I have a C# service where I loop every 1 seconds trough a directory looking for XML files.
These XML files may look like this:
<?xml version="1.0" encoding="UTF-8"?>
<job>
<type>freelance</type>
<text>blah</text>
</job>
In a foreach I do the following:
var doc = new XmlDocument();
doc.LoadXml(xmlFile);
XmlNode xmltype = doc.DocumentElement.SelectSingleNode("/job/type");
And than I would like to use these strings to use in my program, however. Using xmltype.InnerText
does not work. Documentation on MSDN does not provide me with anything new and I would like to know what I am doing wrong.
This following console program will output "freelance". I think the issue may be with some of your XML - do all of your XML docs follow the same schema? I am guessing that the code fails with a NullReferenceException
at some point. I've added a null check to protect against this possible scenario.
To help debug your service I tend to use the technique described here to run the app as console application (for easy debugging) or windows service.
using System;
using System.Xml;
public class Program
{
static string xmlFile = @"<?xml version=""1.0"" encoding=""UTF-8""?>
<job>
<type>freelance</type>
<text>blah</text>
</job>";
public static void Main()
{
var doc = new XmlDocument();
doc.LoadXml(xmlFile);
XmlNode xmltype = doc.DocumentElement.SelectSingleNode("/job/type");
if(xmltype==null)
{
Console.WriteLine("/job/type not found");
} else {
Console.WriteLine(xmltype.InnerText);
}
}
}
First you have to check the xml file.whether is there any data or not. after that take the one particular node check for innerText
. for example
This is the Text
XmlNode xmlType = doc.DocumentElement.SelectSingleNode("/job/type");
xmlType.innerText = "This is the Text";
xmlType.Value = "Stack";
尝试这个:
string str = xmltype.Value;
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