vb.net combobox 绑定数据库之前 先赋值 的问题

[lijujie19860802]

在FORM_LOAD中写
dim a as string = "aaa"

combobox1.text = a


结果的话combobox1.text= ""

可能是因为后面combobox1有绑定数据库有关

我在combobox1的鼠标单击事件里把combobox1绑定数据库了

dim a as string = "aaa"

combobox1.text = a
这里应该怎么写啊？FORM加载的时候combobox1一直是空

[qshurufa]

ComboBox1.Items.Add(a)

[lijujie19860802]

试过了
不过我忘了加
combobox1.selectindex = 0了
可以了

[qshurufa]

Dim myAdapter As New Data.SqlClient.SqlDataAdapter(SQL, conn)
Dim dtList As New DataTable
myAdapter.Fill(dtList)
Dim dr As DataRow = dtList.NewRow
dr(0) = "0"
dr(1) = "请选择"
dtList.Rows.InsertAt(dr, 0)
With ComboBox1
.DataSource = dtList.DefaultView
.DisplayMember = "Name"
.ValueMember = "ID"
.SelectedIndex = 0
End With

这样也可以