文本框无法识别整数

Question

我是Visual Basic Express Edition 2010上的构建计算器。

但是当我运行代码时，它就会出错

TextBox3 = c

错误1类型的值＆＃39;整数＆＃39;无法转换为System.Windows.Forms.TextBox＆＃39;。 C：\ Users \ INFRA \ AppData \ Local \ Temporary Projects \ WindowsApplication1 \ Form1.vb 7 20 WindowsApplication1

完整的代码是：

Public Class Form1
Dim a, b, c As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    a = Val(TextBox1)
    b = Val(TextBox2)
    c = a + b
    TextBox3 = c

End Sub

结束班

Answer 1

您需要使用文本框的Text属性。

Public Class Form1
Dim a, b, c As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    a = Val(TextBox1.Text)
    b = Val(TextBox2.Text)
    c = a + b
    TextBox3.Text = c.ToString()

End Sub