使用XML文件填充组合框 [英] Populate a combobox with an XML file

问题描述

This is the XML file

<Users>
<User userID="4" username="lol" password="lol" usertype="Guest" />
</Users>

我的尝试：

What I have tried:

the code i tried

private void ExistingUser_Load(object sender, EventArgs e)
    {
        var xml = XElement.Load("XMLFile1.xml");
        comboBox1.DisplayMember = "userID";

    }

推荐答案

您没有将任何内容从XML文件分配到组合框。



您可以通过多种方式实现目标...



1.使用System.Xml.Linq ;

You are not assigning anything from the XML file to the comboBox.

There are a variety of ways you can achieve your target...

1. using System.Xml.Linq;

XElement users = XElement.Load(@"c:\temp\temp.xml");
foreach (var urlElement in users.Elements("User"))
    comboBox3.Items.Add(urlElement.Attribute("userID").Value);

2。使用System.Xml; // XmlDocument

2. using System.Xml; // XmlDocument

XmlDocument doc = new XmlDocument();
doc.Load(@"c:\temp\temp.xml");
XmlNodeList userList = doc.SelectNodes("Users/User");
foreach (XmlNode xn in userList)
    comboBox1.Items.Add(xn.Attributes["userID"].Value);

3。使用System.Xml; // XmlTextReader

3. using System.Xml; // XmlTextReader

using (XmlTextReader xmdatareader = new XmlTextReader(@"c:\temp\temp.xml"))
{
    DataSet ds = new DataSet();
    ds.ReadXml(xmdatareader);

    comboBox2.DataSource = ds.Tables[0];
    comboBox2.DisplayMember = "userID";
}

注意所有这些选项我应该检查空值！

Note with all of these options I should have been checking for nulls!

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