VB学习第二周--加法器的实现
发布时间:2020-12-17 08:19:01 所属栏目:百科 来源:网络整理
导读:加法器的实现: Public Class Form1 Private Sub TextBox1_TextChanged(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles TextBox1.TextChanged If Not IsNumeric(TextBox1.Text) Then TextBox1.Text = "" End If End Sub Private Sub Te
加法器的实现: Public Class Form1 Private Sub TextBox1_TextChanged(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles TextBox1.TextChanged If Not IsNumeric(TextBox1.Text) Then TextBox1.Text = "" End If End Sub Private Sub TextBox2_TextChanged(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles TextBox2.TextChanged If Not IsNumeric(TextBox2.Text) Then TextBox2.Text = "" End If End Sub Private Sub Button1_Click(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles Button1.Click TextBox3.Text = Val(TextBox1.Text) + Val(TextBox2.Text) End Sub Private Sub Button2_Click(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles Button2.Click TextBox2.Text = "" TextBox1.Text = "" TextBox3.Text = "" TextBox1.Focus() End Sub Private Sub Button3_Click(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles Button3.Click End End Sub Private Sub Form1_Load(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles MyBase.Load End Sub End Class (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |