Question

vb.net 字符串连接，下面的代码执行后提示： 从字符串“ennum1&”到类型“Double”的转换无效。 请高手指点

Dim i As Random
i = New Random()
Dim ennum1 As Integer
Dim ennum2 As Integer
ennum1 = i.Next(1, 99).ToString
ennum2 = i.Next(1, 99).ToString
Label3.Text = "ennum1 & " * " & ennum2 & "=" "

该如何修改才能编译？

Answer 1

Label3.Text = "ennum1 & " * " & ennum2 & "=" "
改成：
Label3.Text =ennum1.tostring() & "*" & ennum2.tostring() & "="
就可以了，你试试！

Answer 2

Dim i As Random
i = New Random()
Dim ennum1 As Integer
Dim ennum2 As Integer
ennum1 = i.Next(1, 99).ToString
ennum2 = i.Next(1, 99).ToString
Label3.Text = ennum1 & " * " & ennum2 & " = "

Answer 3

Label3.Text = ennum1 & " * " & ennum2 & " = "