如何在vb.net的listbox中添加字符串值和整数值？

Question

我是vb.net的初学者.我尝试将字符串值和整数值添加到列表框中,但它会抛出无效的强制转换异常.我提到代码如下.

Public Class frmDetails

        Private Sub btnCompute_Click(sender As System.Object, e As System.EventArgs) Handles btnCompute.Click
            Listbox1.Items.Add("sum is " + (3 + 2))
            Listbox1.Items.Add("Substract is" + (3 - 2))
            Listbox1.Items.Add("Multiplication is " + (3 * 2))
            Listbox1.Items.Add("Division is " + (3 / 2))
            Listbox1.Items.Add("3 to power 2  " + (3 ^ 2))
        End Sub

        Private Sub btnExit_Click(sender As System.Object, e As System.EventArgs) Handles btnExit.Click
            Dispose()
        End Sub
    End Class

请帮我解决这个问题.

Answer 1

使用&for连接字符串.然后使用ToString方程式.

 Listbox1.Items.Add("sum is " & (3 + 2).ToString)