'新建一個VB.NET 項目，把原來所有代碼刪了，把下面的代碼復(fù)制貼上去解OK了
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Public Class Form1
Inherits System.Windows.Forms.Form
#Region " Windows 窗體設(shè)計器生成的代碼 "
Public Sub New()
MyBase.New()
'該調(diào)用是 Windows 窗體設(shè)計器所必需的。
InitializeComponent()
'在 InitializeComponent() 調(diào)用之后添加任何初始化
End Sub
'窗體重寫 dispose 以清理組件列表。
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Windows 窗體設(shè)計器所必需的
Private components As System.ComponentModel.IContainer
'注意: 以下過程是 Windows 窗體設(shè)計器所必需的
'可以使用 Windows 窗體設(shè)計器修改此過程。
'不要使用代碼編輯器修改它。
Friend WithEvents RadioButton1 As System.Windows.Forms.RadioButton
Friend WithEvents RadioButton2 As System.Windows.Forms.RadioButton
Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
Friend WithEvents GroupBox2 As System.Windows.Forms.GroupBox
Friend WithEvents RadioButton3 As System.Windows.Forms.RadioButton
Friend WithEvents RadioButton4 As System.Windows.Forms.RadioButton
Friend WithEvents CheckBox1 As System.Windows.Forms.CheckBox
Friend WithEvents CheckBox2 As System.Windows.Forms.CheckBox
Friend WithEvents CheckBox3 As System.Windows.Forms.CheckBox
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
Friend WithEvents Button1 As System.Windows.Forms.Button
System.Diagnostics.DebuggerStepThrough() Private Sub InitializeComponent()
Me.RadioButton1 = New System.Windows.Forms.RadioButton
Me.RadioButton2 = New System.Windows.Forms.RadioButton
Me.GroupBox1 = New System.Windows.Forms.GroupBox
Me.GroupBox2 = New System.Windows.Forms.GroupBox
Me.RadioButton3 = New System.Windows.Forms.RadioButton
Me.RadioButton4 = New System.Windows.Forms.RadioButton
Me.CheckBox1 = New System.Windows.Forms.CheckBox
Me.CheckBox2 = New System.Windows.Forms.CheckBox
Me.CheckBox3 = New System.Windows.Forms.CheckBox
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.Button1 = New System.Windows.Forms.Button
Me.GroupBox1.SuspendLayout()
Me.GroupBox2.SuspendLayout()
Me.SuspendLayout()
'
'RadioButton1
'
Me.RadioButton1.Location = New System.Drawing.Point(16, 24)
Me.RadioButton1.Name = "RadioButton1"
Me.RadioButton1.Size = New System.Drawing.Size(56, 24)
Me.RadioButton1.TabIndex = 1
Me.RadioButton1.Text = "紅色"
'
'RadioButton2
'
Me.RadioButton2.Location = New System.Drawing.Point(72, 24)
Me.RadioButton2.Name = "RadioButton2"
Me.RadioButton2.Size = New System.Drawing.Size(48, 24)
Me.RadioButton2.TabIndex = 2
Me.RadioButton2.Text = "藍(lán)色"
'
'GroupBox1
'
Me.GroupBox1.Controls.Add(Me.RadioButton2)
Me.GroupBox1.Controls.Add(Me.RadioButton1)
Me.GroupBox1.Location = New System.Drawing.Point(16, 144)
Me.GroupBox1.Name = "GroupBox1"
Me.GroupBox1.Size = New System.Drawing.Size(128, 56)
Me.GroupBox1.TabIndex = 5
Me.GroupBox1.TabStop = False
Me.GroupBox1.Text = "顏色"
'
'GroupBox2
'
Me.GroupBox2.Controls.Add(Me.RadioButton3)
Me.GroupBox2.Controls.Add(Me.RadioButton4)
Me.GroupBox2.Location = New System.Drawing.Point(176, 144)
Me.GroupBox2.Name = "GroupBox2"
Me.GroupBox2.Size = New System.Drawing.Size(136, 56)
Me.GroupBox2.TabIndex = 6
Me.GroupBox2.TabStop = False
Me.GroupBox2.Text = "字號"
'
'RadioButton3
'
Me.RadioButton3.Location = New System.Drawing.Point(16, 24)
Me.RadioButton3.Name = "RadioButton3"
Me.RadioButton3.Size = New System.Drawing.Size(56, 24)
Me.RadioButton3.TabIndex = 2
Me.RadioButton3.Text = "30號"
'
'RadioButton4
'
Me.RadioButton4.Location = New System.Drawing.Point(72, 24)
Me.RadioButton4.Name = "RadioButton4"
Me.RadioButton4.Size = New System.Drawing.Size(48, 24)
Me.RadioButton4.TabIndex = 1
Me.RadioButton4.Text = "40號"
'
'CheckBox1
'
Me.CheckBox1.Location = New System.Drawing.Point(32, 208)
Me.CheckBox1.Name = "CheckBox1"
Me.CheckBox1.Size = New System.Drawing.Size(80, 32)
Me.CheckBox1.TabIndex = 7
Me.CheckBox1.Text = "加粗"
'
'CheckBox2
'
Me.CheckBox2.Location = New System.Drawing.Point(120, 208)
Me.CheckBox2.Name = "CheckBox2"
Me.CheckBox2.Size = New System.Drawing.Size(80, 32)
Me.CheckBox2.TabIndex = 8
Me.CheckBox2.Text = "斜體"
'
'CheckBox3
'
Me.CheckBox3.Location = New System.Drawing.Point(200, 208)
Me.CheckBox3.Name = "CheckBox3"
Me.CheckBox3.Size = New System.Drawing.Size(80, 32)
Me.CheckBox3.TabIndex = 9
Me.CheckBox3.Text = "下劃線"
'
'TextBox1
'
Me.TextBox1.Font = New System.Drawing.Font("宋體", 9.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
Me.TextBox1.Location = New System.Drawing.Point(8, 16)
Me.TextBox1.Multiline = True
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
Me.TextBox1.Size = New System.Drawing.Size(320, 112)
Me.TextBox1.TabIndex = 0
Me.TextBox1.Text = "話說天下大勢，分久必合，合久必分。"
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(88, 256)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(152, 32)
Me.Button1.TabIndex = 10
Me.Button1.Text = "確定"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
Me.ClientSize = New System.Drawing.Size(336, 310)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.CheckBox3)
Me.Controls.Add(Me.CheckBox2)
Me.Controls.Add(Me.CheckBox1)
Me.Controls.Add(Me.GroupBox2)
Me.Controls.Add(Me.GroupBox1)
Me.Controls.Add(Me.TextBox1)
Me.Name = "Form1"
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
Me.Text = "Form1"
Me.GroupBox1.ResumeLayout(False)
Me.GroupBox2.ResumeLayout(False)
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If Me.RadioButton1.Checked = True Then Me.TextBox1.ForeColor = System.Drawing.Color.Red
If Me.RadioButton2.Checked = True Then Me.TextBox1.ForeColor = System.Drawing.Color.Blue
If Me.RadioButton3.Checked = True Then Me.TextBox1.Font = New Font("宋體", 30)
If Me.RadioButton4.Checked = True Then Me.TextBox1.Font = New Font("宋體", 40)
Dim style As FontStyle = FontStyle.Regular
If Me.CheckBox1.Checked = True Then style = style Or FontStyle.Bold
If Me.CheckBox2.Checked = True Then style = style Or FontStyle.Italic
' If Me.CheckBox1.Checked = True And Me.CheckBox2.Checked = True Then TextBox1.Font = New Font(TextBox1.Font, FontStyle.Bold Or FontStyle.Italic)
If Me.CheckBox3.Checked = True Then style = style Or FontStyle.Underline
Me.TextBox1.Font = New Font(TextBox1.Font, style)
End Sub
End Class
Dim s As String = "12" Dim n As Integer = CType(s, Integer) Dim m As Integer = Convert.ToInt32(s) Dim o As Integer = Integer.Parse(
字符串是string類型...就比如123吧，字符串的123是這樣的“123”，而數(shù)值的123是123，沒有雙引號，可能你還不理解，就來個簡單的加法運(yùn)算吧，字符串"123"+"123"="123123",而數(shù)值123+123=246，懂了嗎？
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