标签从字符串到双精度转换无效

Question

我有以下代码，它适用于倒数计时器

 Dim countdown As Integer = SharpTextBox6.Text
    Label1.Text = "Sending to " + "" + SharpTextBox4.Text + "" + "For" + countdown.ToString - 1

问题是它说“从字符串的对话”值...“加倍无效。为什么它会转换为加倍？以及我如何解决这个问题

Answer 1

你可以试试这个：

Label1.Text = "Sending to " + SharpTextBox4.Text + "For" + (countdown - 1).ToString

Answer 2

MSDN ：When you use the + operator, you may not be able to determine whether addition or string concatenation will occur. Use the & operator for concatenation to eliminate ambiguity and provide self-documenting code.

Label1.Text = "Sending to " & SharpTextBox4.Text & " For " & (countdown - 1)