C＃应用程序不会在XML文档中显示最后一个属性值

Question

AC# project I am working on will not display/insert the last value within an XML tag. For Example my application iterates through this tag and will get 1, 2 3 but not 4. It does that with every iteration.

<purpose>
 <intendedUse id="1"/>
 <intendedUse id="2"/>
 <intendedUse id="3"/>
 <intendedUse id="4"/>
</purpose>

I believe it has something to do with the int num declaration. NOTE: I commented my sqlite command so i wont write to the database. I have a messagebox to display what the values will be.

 for (i = 0; i < xmlnode.Count - 1; i++ )
            {
                str = xmlnode[i].Attributes[0].Value;
                int num = Int32.Parse(str) - 1;
                for ( var count = 0; count < xmlnode[num].FirstChild.NextSibling.ChildNodes.Count - 1; count++)
                {
                    str2 = xmlnode[num].FirstChild.NextSibling.ChildNodes[count].Attributes[0].Value; 
                    MessageBox.Show(str2);
                }

                //SQLiteCommand cmd = new SQLiteCommand(connection);
                //cmd.CommandText = "INSERT INTO languagePurpose (purposeID, languageID) VALUES ('" + str2 + "', '" + str + "')";
                //SQLiteDataReader dr = cmd.ExecuteReader();
               // MessageBox.Show(str);
            }

Answer 1

This probably isn't the answer you are looking for, but in Linq-to-XML this is very easy. Lets assume you loaded your xml into a XDocument named "xml".

for(XNode node in xml.Element("purpose").Elements("intendedUse"))
{
    //sets the value of the id attribute to str2
    str2 = node.Attribute("id").Value;
}

With the above solution you can have a possible NullReferenceException if the no id attribute exists, or there's no "purpose" nodes, but the concept should be pretty clear from my example.

Obviously you can do whatever you want in there, but LINQ-to-XML is far easier to use than XmlDocument especially if you're trying to learn how to do XML parsing.

Here's a link to get you started: Linq-to-XML MSDN

Answer 2

Figured it out. I was supposed to remove the -1 in

count < xmlnode[num].FirstChild.NextSibling.ChildNodes.Count - 1`

Didnt notice until @Nadia brought it up for my first for loop, and I didn't notice that I added the -1 by habit.