从xml文件读取值并绑定多个控件，控件互相干扰的问题 求助
大家好 我写了个函数用来从xml文件中读取控件的值，然后绑定。但是奇怪的是，当选择控件comboBoxEx41的值时， comboBoxEx42和comboBoxEx43 也同时变成和 comboBoxEx41 一样了。 请问是什么问题呢？
我想让三个控件绑定相同的属性值，操作互不干扰，应该怎么修改呢？ 谢谢 下面是代码：
//从xml文件中绑定控件
private void update1()
{
DataSet ds = new DataSet();
string fromPath = System.Environment.CurrentDirectory + @"\conf\rate_group.xml";
FileInfo xmlFile = new FileInfo(fromPath);
if (xmlFile.Exists)
{
FileStream fsReadxml = new FileStream(fromPath, FileMode.Open);
XmlTextReader myXmlReader = new XmlTextReader(fsReadxml);
ds.ReadXml(myXmlReader);
myXmlReader.Close();
}
comboBoxEx41.DataSource = ds.Tables[0];
comboBoxEx41.DisplayMember = "displaymember";
comboBoxEx41.ValueMember = "valuemember";
comboBoxEx41.SelectedIndex = -1;
comboBoxEx41.DropDownStyle = ComboBoxStyle.DropDownList;
comboBoxEx42.DataSource = ds.Tables[0];
comboBoxEx42.DisplayMember = "displaymember";
comboBoxEx42.ValueMember = "valuemember";
comboBoxEx42.SelectedIndex = -1;
comboBoxEx42.DropDownStyle = ComboBoxStyle.DropDownList;
comboBoxEx43.DataSource = ds.Tables[0];
comboBoxEx43.DisplayMember = "displaymember";
comboBoxEx43.ValueMember = "valuemember";
comboBoxEx43.SelectedIndex = -1;
comboBoxEx43.DropDownStyle = ComboBoxStyle.DropDownList;
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Xml;
using System.IO;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
DataSet ds = new DataSet();
string xml = @"<root>
<item displaymember=""a"" valuemember=""1""></item>
<item displaymember=""b"" valuemember=""2""></item>
<item displaymember=""c"" valuemember=""3""></item>
</root>";
MemoryStream stream = new MemoryStream(Encoding.Default.GetBytes(xml));
XmlTextReader myXmlReader = new XmlTextReader(stream);
ds.ReadXml(myXmlReader);
myXmlReader.Close();
comboBox1.DataSource = ds.Tables[0].Copy();
comboBox1.DisplayMember = "displaymember";
comboBox1.ValueMember = "valuemember";
comboBox1.SelectedIndex = -1;
comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
comboBox2.DataSource = ds.Tables[0].Copy();
comboBox2.DisplayMember = "displaymember";
comboBox2.ValueMember = "valuemember";
comboBox2.SelectedIndex = -1;
comboBox2.DropDownStyle = ComboBoxStyle.DropDownList;
comboBox3.DataSource = ds.Tables[0].Copy();
comboBox3.DisplayMember = "displaymember";
comboBox3.ValueMember = "valuemember";
comboBox3.SelectedIndex = -1;
comboBox3.DropDownStyle = ComboBoxStyle.DropDownList;
}
}
}
