Question

嗨我是vb的新手，我想在我的msgbox中显示文本和变量，但我似乎无法弄明白。我的代码是

Data = "UPDATE [Mc_Koy].[dbo].[User] SET [Balance] = [Balance] - '" & txt_fare.Text & "'WHERE [ID] = '" & txtbox_id.Text & "'"
    Command = New SqlCommand(Data, Connection)
    Command.ExecuteNonQuery()
    Dim Data1 As String = "SELECT [Balance] FROM [Mc_Koy].[dbo].[User] Where [ID] = '" & txtbox_id.Text & "'"
    Dim Command1 As New SqlCommand(Data1, Connection)
    Command1.ExecuteNonQuery()
    Dim dr As SqlDataReader
    dr = Command1.ExecuteReader
    With dr
        .Read()
        Dim f As Double
        MsgBox("Current Balance is ", .Item(0))
        .Close()
    End With

但是当我运行它时它只显示消息“当前余额是：”

Answer 1

我认为您要将其附加到字符串中，因此请使用&：

 MsgBox("Current Balance is " & .Item(0))

Vb.net显示消息框文本和变量

1 个答案: