Question

我是初学者所以请你好。我在Visual Basic中制作货币兑换计算器，我遇到了一个我似乎无法弄清楚的错误：

未将对象引用设置为对象的实例。

以下是我正在努力解决的代码：

Dim Currency As Double
Dim TextOther As String = Othertext.Text
Dim TextGBP As String = GBPtext.Text

Private Sub Calculate_Click(sender As Object, e As EventArgs) Handles Calculate.Click
    TextOther = Currency * Convert.ToDouble(TextGBP)
    TextGBP = Currency * Convert.ToDouble(TextOther)
End Sub

提前谢谢。

Answer 1

您需要将货币设置为某种内容并使用＆＃39; .text。之后（我假设是）你的文本框。

还可以在点击事件中设置变量。

Dim Currency As Double
Dim TextOther As String
Dim TextGBP As String

Private Sub Calculate_Click(sender As Object, e As EventArgs) Handles Calculate.Click
currency = 10.0
TextOther = Othertext.Text
TextGBP = GBPtext.Text

TextOther.text = Currency * Convert.ToDouble(TextGBP)
TextGBP.text = Currency * Convert.ToDouble(TextOther)
End Sub

Visual Basic（初学者）错误：对象引用未设置为对象的实例

1 个答案: