sql-server - 如何从 Listview 保存到 MS SQL Server

Question

我正在尝试将列表视图控件中的数据保存到 Microsoft SQL Server。当我运行代码时，没有显示任何错误，但数据没有保存在数据库中。有人可以帮助我吗？

Private Sub Save_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        Dim con As New SqlConnection(InvoiceClass.GetConnectionString()) ' My Connection String
        con.Open()
        For Each item As ListViewItem In Lstview.Items
            Dim command As SqlCommand = New SqlCommand("SP_InvoiceSave", con)
            command.Parameters.AddWithValue("@ItemName", item.SubItems(0).Text)
            command.Parameters.AddWithValue("@Qty", item.SubItems(1).Text)
            command.Parameters.AddWithValue("@SellingPrice", item.SubItems(2).Text)
            command.CommandType = CommandType.StoredProcedure
            Dim adapter As SqlDataAdapter = New SqlDataAdapter(command)
        Next
        MsgBox("done")
    End Sub

Answer 1

Private Sub Save_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

            Dim con As New SqlConnection(InvoiceClass.GetConnectionString()) ' My Connection String
            'open connection
            con.Open()
            For Each item As ListViewItem In Lstview.Items
                Dim command As SqlCommand = New SqlCommand("SP_InvoiceSave", con)
                command.Parameters.AddWithValue("@ItemName", item.SubItems(0).Text)
                command.Parameters.AddWithValue("@Qty", item.SubItems(1).Text)
                command.Parameters.AddWithValue("@SellingPrice", item.SubItems(2).Text)
                command.CommandType = CommandType.StoredProcedure
                command.ExecuteNonQuery() 
            Next
            MsgBox("done")
            'closing connection
            conn.Close()

End Sub