.Net平台Winform两个ComboBox控件绑定同一个数据源

今天WINFROM编程遇到这么一个问题：是有关WINFORM中两个comboBox控件绑定同一个数据源的问题，在窗体的界面上有两个comboBox，我在Form1_Load中对他们做了数据绑定（具体代码如下），但是运行出现了这个一个奇怪的问题，我改变了comboBox1的值，但是comboBox2的值也自动改变了，我没有设置comboBox1_SelectedIndexChanged函数

 1 private void Form1_Load(object sender, EventArgs e) 

 2 { 

 3 dataset ds=getds("select code,name from shp") ;

 4  

 5 comboBox1.DataSource = ds; 

 6 comboBox1.ValueMember = "code"; 

 7 comboBox1.DisplayMember = "name"; 

 8 comboBox1.SelectedIndex = 0; 

 9 

10 

11 comboBox2.DataSource = ds; 

12 comboBox2.ValueMember = "code"; 

13 comboBox2.DisplayMember = "name"; 

14 comboBox2.SelectedIndex = 0; 

15 }

 

解决方法：

 1 dataset ds=getds("select code,name from shp") 

 2 

 3 comboBox1.DataSource = ds; 

 4 comboBox1.ValueMember = "code"; 

 5 comboBox1.DisplayMember = "name"; 

 6 comboBox1.SelectedIndex = 0; 

 7 

 8 comboBox2.DataSource = ds.Copy(); 

 9 comboBox2.ValueMember = "code"; 

10 comboBox2.DisplayMember = "name"; 

11 comboBox2.SelectedIndex = 0;