如何在vb.net中保存时刷新数据？

' 假设你已经建立了与数据库的连接，并且有一个名为"customers"的表格

' 加载数据到DataGridView控件
Private Sub LoadData()
    Dim conn As New SqlConnection("连接字符串")
    Dim cmd As New SqlCommand("SELECT * FROM customers", conn)
    Dim adapter As New SqlDataAdapter(cmd)
    Dim dataset As New DataSet()

    adapter.Fill(dataset, "customers")
    DataGridView1.DataSource = dataset.Tables("customers")
End Sub

' 保存数据并刷新
Private Sub SaveData()
    ' 保存修改的数据到数据库
    Dim conn As New SqlConnection("连接字符串")
    Dim cmd As New SqlCommand("UPDATE customers SET ...", conn)
    ' 执行保存操作

    ' 刷新数据
    LoadData()
End Sub

' 保存按钮点击事件
Private Sub btnSave_Click(sender As Object, e As EventArgs) Handles btnSave.Click
    SaveData()
End Sub