Visual_Studio2008教程

Visual Studio2008教程 Visual Studio2008发布后，有大量的VB.net爱好者抛弃原来的Visual Studio2005平台转向现在流行的Visual Studio2008平台。但是Visual Studio2008有一个缺点就是需要比较高的硬件配置才能正常平稳的运行，所以到现在为止还有一部分人处于观望中，并没有转向这个平台。然而Visual Studio2008的一些新的功能以及优化性比先前版本有了很大的进步。本篇文章将主要介绍怎样利用VB.net去编写一个计算器程序，程序虽然不复杂，但是其中所运用的知识和代码非常具有代表性，在平时开发中也是经常需要用到的。希望对VB.net2008的初学者带来帮助。 打开 Visual Studio 2008。在文件 (File) 菜单上，单击新建项目 (New Project)。 在新建项目 (New Project) 对话框的模板 (Templates) 窗格中，单击 Windows 应用程序(Windows Application)。单击确定 (OK)。 在Form1窗体中添加一个TextBox1控件和19个Button按钮，详细属性设置请查看以下的表格。 TextBox1 数据显示框 Button1 0 Button2 . Button3 归零 Button4 无 Button5 ＝ Button6 1 Button7 2 Button8 3 Button9 + Button10 - Button11 4 Button12 5 Button13 6 Button14 Button15 / Button16 7 Button17 8 Button18 9 Button19 ON Button20 OFF 详细的界面请查看图1 图1 好了基本的界面已经 设计 领导形象设计圆作业设计ao工艺污水处理厂设计附属工程施工组织设计清扫机器人结构设计 好了，接下来我们来添加相应的代码了，首先进行必要的声明事件。 Public Class Form1 Dim strdx() As String = {"0", "0", "0"} '声明一个字符串，用以存取数值 Dim calcount1 As String = "0" Dim calcount2 As String = "0" Dim strvalue As Boolean = False 然后需要进入Button1.Click事件中.代码如下 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If strdx(0) = "0" Then TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "0" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "0" TextBox1.Text = strdx(0) End If End Sub 进入Button2.Click事件中.代码如下 Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click strvalue = True strdx(0) = strdx(0) & "." TextBox1.Text = strdx(0) End Sub 进入Button3.Click事件中.代码如下 Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click strdx(0) = "0" strdx(1) = "0" strdx(2) = "0" calcount1 = "0" calcount2 = "0" strvalue = False TextBox1.Text = "0." End Sub 进入Button5.Click事件中.代码如下 Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click If strdx(2) = "0" Then Select Case calcount1 Case "+" TextBox1.Text = Str(Val(strdx(1)) + Val(strdx(0))) Case "-" TextBox1.Text = Str(Val(strdx(1)) - Val(strdx(0))) Case "*" TextBox1.Text = Str(Val(strdx(1)) * Val(strdx(0))) Case "/" If strdx(0) = "0" Then TextBox1.Text = "error!" Else TextBox1.Text = Str(Val(strdx(1)) / Val(strdx(0))) End If End Select ElseIf calcount2 = "*" Then strdx(0) = Str(Val(strdx(0)) * Val(strdx(2))) Select Case calcount1 Case "+" TextBox1.Text = Str(Val(strdx(1)) + Val(strdx(0))) Case "-" TextBox1.Text = Str(Val(strdx(1)) - Val(strdx(0))) Case "*" TextBox1.Text = Str(Val(strdx(1)) * Val(strdx(0))) Case "/" If strdx(0) = "0" Then TextBox1.Text = "error!" Else TextBox1.Text = Str(Val(strdx(1)) / Val(strdx(0))) End If End Select Else : calcount2 = "/" strdx(0) = Str(Val(strdx(2)) / Val(strdx(0))) Select Case calcount1 Case "+" TextBox1.Text = Str(Val(strdx(1)) + Val(strdx(0))) Case "-" TextBox1.Text = Str(Val(strdx(1)) - Val(strdx(0))) Case "*" TextBox1.Text = Str(Val(strdx(1)) * Val(strdx(0))) Case "/" If strdx(0) = "0" Then TextBox1.Text = "error!" Else TextBox1.Text = Str(Val(strdx(1)) / Val(strdx(0))) End If End Select End If End Sub 进入Button6.Click事件中.代码如下 Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click If strdx(0) = "0" Then strdx(0) = "1" TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "1" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "1" TextBox1.Text = strdx(0) End If End Sub 进入Button7.Click事件中.代码如下 Private Sub Button7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button7.Click If strdx(0) = "0" Then strdx(0) = "2" TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "2" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "2" TextBox1.Text = strdx(0) End If End Sub 进入Button8.Click事件中.代码如下 Private Sub Button8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button8.Click If strdx(0) = "0" Then strdx(0) = "3" TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "3" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "3" TextBox1.Text = strdx(0) End If End Sub 进入Button9.Click事件中.代码如下 Private Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click If calcount1 = "0" Then calcount1 = "+" strdx(1) = strdx(0) strdx(0) = "0" Else : Select Case calcount1 Case "+" strdx(1) = Str(Val(strdx(0)) + Val(strdx(1))) strdx(0) = "0" calcount1 = "+" Case "-" strdx(1) = Str(Val(strdx(1)) - Val(strdx(0))) strdx(0) = "0" calcount1 = "+" Case "*" strdx(1) = Str(Val(strdx(0)) * Val(strdx(1))) strdx(0) = "0" calcount1 = "+" Case "/" strdx(1) = Str(Val(strdx(1)) / Val(strdx(0))) strdx(0) = "0" calcount1 = "+" End Select End If End Sub 进入Button10.Click事件中.代码如下 Private Sub Button10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button10.Click If calcount1 = "0" Then calcount1 = "-" strdx(1) = strdx(0) strdx(0) = "0" Else : Select Case calcount1 Case "+" strdx(1) = Str(Val(strdx(0)) + Val(strdx(1))) strdx(0) = "0" calcount1 = "-" Case "-" strdx(1) = Str(Val(strdx(1)) - Val(strdx(0))) strdx(0) = "0" calcount1 = "-" Case "*" strdx(1) = Str(Val(strdx(0)) * Val(strdx(1))) strdx(0) = "0" calcount1 = "-" Case "/" strdx(1) = Str(Val(strdx(1)) / Val(strdx(0))) strdx(0) = "0" calcount1 = "-" End Select End If End Sub 进入Button11.Click事件中.代码如下 Private Sub Button11_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button11.Click If strdx(0) = "0" Then strdx(0) = "4" TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "4" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "4" TextBox1.Text = strdx(0) End If End Sub 进入Button12.Click事件中.代码如下 Private Sub Button12_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button12.Click If strdx(0) = "0" Then strdx(0) = "5" TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "5" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "5" TextBox1.Text = strdx(0) End If End Sub 进入Button13.Click事件中.代码如下 Private Sub Button13_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button13.Click If strdx(0) = "0" Then strdx(0) = "6" TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "6" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "6" TextBox1.Text = strdx(0) End If End Sub 进入Button14.Click事件中.代码如下 Private Sub Button14_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button14.Click If calcount1 = "0" Then calcount1 = "*" strdx(1) = strdx(0) strdx(0) = "0" Else : Select Case calcount1 Case "+" calcount2 = "*" strdx(2) = strdx(0) strdx(0) = "0" Case "-" calcount2 = "*" strdx(2) = strdx(0) strdx(0) = "0" Case "*" strdx(1) = Str(Val(strdx(0)) * Val(strdx(1))) strdx(0) = "0" calcount1 = "*" Case "/" strdx(1) = Str(Val(strdx(1)) / Val(strdx(0))) strdx(0) = "0" calcount1 = "*" End Select End If End Sub 进入Button15.Click事件中.代码如下 Private Sub Button15_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button15.Click If calcount1 = "0" Then calcount1 = "/" strdx(1) = strdx(0) strdx(0) = "0" Else : Select Case calcount1 Case "+" calcount2 = "/" strdx(2) = strdx(0) strdx(0) = "0" Case "-" calcount2 = "/" strdx(2) = strdx(0) strdx(0) = "0" Case "*" strdx(1) = Str(Val(strdx(0)) * Val(strdx(1))) strdx(0) = "0" calcount1 = "/" Case "/" strdx(1) = Str(Val(strdx(1)) / Val(strdx(0))) strdx(0) = "0" calcount1 = "/" End Select End If End Sub 进入Button16.Click事件中.代码如下 Private Sub Button16_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button16.Click If strdx(0) = "0" Then strdx(0) = "7" TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "7" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "7" TextBox1.Text = strdx(0) End If End Sub 进入Button17.Click事件中.代码如下 Private Sub Button17_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button17.Click If strdx(0) = "0" Then strdx(0) = "8" TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "8" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "8" TextBox1.Text = strdx(0) End If End Sub 进入Button18.Click事件中.代码如下 Private Sub Button18_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button18.Click If strdx(0) = "0" Then strdx(0) = "9" TextBox1.Text = strdx(0) & "." ElseIf strvalue = False Then strdx(0) = strdx(0) & "9" TextBox1.Text = strdx(0) & "." Else strdx(0) = strdx(0) & "9" TextBox1.Text = strdx(0) End If End Sub 进入Button19.Click事件中.代码如下 Private Sub Button19_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button19.Click TextBox1.Text = "0." End Sub 进入Button20.Click事件中.代码如下 Private Sub Button20_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button20.Click Me.Close() End Sub 最后的代码如图2: 图2 程序代码输入完成，接下来我们来运行一下程序，进行测试。最后程序运行效果如图3 图3 程序运行稳定能够进行正常的加减乘除等，如果你觉得功能不够，你还可以再去添加一些新的功能。