vb.net中的combobox数据绑定问题

使用SelectedIndexChanged事件

Private Sub cbxBigDept_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
dim strBM as string
strBM=cbxBigDept.selectedValue ' 获得当前大部门名称
Dim myConn as SqlConnection = new sqlconnection(".......")
myConn.Open()
Dim myCmd as string = "select 小部门 from 小部门表 Where 大部门='" & strBM & "'"

Dim myAdapter as SqlDataAdapter = new SqlDataAdapter(myCmd,myConn)
Dim myDataSet as DataSet = new DataSet
myAdapter.Fill(myDataSet)
Me.cbxSonDept.DataSource = myAdapter.Table(0)
Me.cbxSonDept.ValueMember = "小部门"
myConn.Close

End Sub

祝你成功！

.如combobox1是绑定专业编号的,combobox2是绑定班级编号的
dim mydataset as new dataset()
.....
combobox1.datasource=mydataset
combobox1.displaymember="表.专业编号"
combobox2.datasource=mydataset
combobox2.displaymember="表.班级编号"