如何为类按钮编写事件?

Question

我做了个类，其中有个按钮，单击时，打开一个对话框，该如何写Click事件代码？

Answer 1

难道是过于简单了，没人回答？

Answer 2

你好！
     订阅这个按钮的Click事件，然后事件处理函数中写代码就可以了！

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周雪峰

Answer 3

谢谢周版主！

    能具体写一下吗？

    我以BindingNavigator为基础，做了一个新类，扩展了一下它的功能，加了几个按钮：筛选、打印、查询等，点击筛选后，打开筛选对话框。

    在窗体中，为按钮加Click事件很简单：

      Private Sub BindingNavigatorFilterItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BindingNavigatorFilterItem.Click
              FilterDialog.ShowDialog()
      End Sub

    但，我想把它加到类中，这样，维护就简单了。可怎么写呢？

    不好意思，麻烦你了，入门真是个痛苦的过程。

Answer 4

你好！

     在类中添加也是类似的！

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周雪峰

Answer 5

但我把这段代码复制过去，根本不好用。

Answer 6

你好！

     请问遇到什么问题？编译出错，还是怎样？

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周雪峰

Answer 7

没反应。

根本未执行。

Answer 8

难道这是个难题？

Answer 9

你好！

     这个问题十分的简单，我实在猜测不出你具体是怎样做的，请提供相关的类代码，你怎么复制的？

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周雪峰

Answer 10

你好，周版主！

    这是我以BindingNavigator为基础，做了一个新类，扩展了一下它的功能，加了几个按钮：筛选、打印、查询等，相关功能未完全加上。

    最后黑体部分代码：点击查询后，打开查询对话框。若在窗体中，在查询按钮上直接为Click事件加上这段代码，则可打开查询对话框，但用在类中，则不行。

    另外，这个组件，在VS2010中，用设计器打开时，总报错：

        警告 1 对象与目标类型不匹配。 E:\Erp\Erp\Erp\HBindingNavigator.Designer.vb 124 0 
        警告 2 类型“System.Windows.Forms.ToolStripTextBox”没有名为“ToolTipText”的属性。 E:\Erp\Erp\Erp\HBindingNavigator.Designer.vb 125 0 

    请指教！

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class HBindingNavigator
    Inherits System.Windows.Forms.BindingNavigator

    'Form 重写 Dispose，以清理组件列表。
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改它。
    '不要使用代码编辑器修改它。
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container()
        Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(HBindingNavigator))
        Me.BindingNavigator = New System.Windows.Forms.BindingNavigator(Me.components)
        Me.BindingNavigatorAddNewItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorCountItem = New System.Windows.Forms.ToolStripLabel()
        Me.BindingNavigatorDeleteItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorMoveFirstItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorMovePreviousItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorSeparator = New System.Windows.Forms.ToolStripSeparator()
        Me.BindingNavigatorPositionItem = New System.Windows.Forms.ToolStripTextBox()
        Me.BindingNavigatorSeparator1 = New System.Windows.Forms.ToolStripSeparator()
        Me.BindingNavigatorMoveNextItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorMoveLastItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorSeparator2 = New System.Windows.Forms.ToolStripSeparator()
        Me.BindingNavigatorEditItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorReplaceItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorImportItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorConfirmItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorSeparator3 = New System.Windows.Forms.ToolStripSeparator()
        Me.BindingNavigatorFilterItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorPreviewItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorPrintItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorQueryItem = New System.Windows.Forms.ToolStripButton()
        Me.BindingNavigatorSeparator4 = New System.Windows.Forms.ToolStripSeparator()
        Me.BindingNavigatorEnterItem = New System.Windows.Forms.ToolStripButton()
        CType(Me.BindingNavigator, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.BindingNavigator.SuspendLayout()
        CType(Me, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'BindingNavigator
        '
        Me.BindingNavigator.AddNewItem = Me.BindingNavigatorAddNewItem
        Me.BindingNavigator.CountItem = Me.BindingNavigatorCountItem
        Me.BindingNavigator.DeleteItem = Me.BindingNavigatorDeleteItem
        Me.BindingNavigator.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.BindingNavigatorMoveFirstItem, Me.BindingNavigatorMovePreviousItem, Me.BindingNavigatorSeparator, Me.BindingNavigatorPositionItem, Me.BindingNavigatorCountItem, Me.BindingNavigatorSeparator1, Me.BindingNavigatorMoveNextItem, Me.BindingNavigatorMoveLastItem, Me.BindingNavigatorSeparator2, Me.BindingNavigatorAddNewItem, Me.BindingNavigatorEditItem, Me.BindingNavigatorDeleteItem, Me.BindingNavigatorReplaceItem, Me.BindingNavigatorImportItem, Me.BindingNavigatorConfirmItem, Me.BindingNavigatorSeparator3, Me.BindingNavigatorFilterItem, Me.BindingNavigatorPreviewItem, Me.BindingNavigatorPrintItem, Me.BindingNavigatorQueryItem, Me.BindingNavigatorSeparator4, Me.BindingNavigatorEnterItem})
        Me.BindingNavigator.Location = New System.Drawing.Point(0, 0)
        Me.BindingNavigator.MoveFirstItem = Me.BindingNavigatorMoveFirstItem
        Me.BindingNavigator.MoveLastItem = Me.BindingNavigatorMoveLastItem
        Me.BindingNavigator.MoveNextItem = Me.BindingNavigatorMoveNextItem
        Me.BindingNavigator.MovePreviousItem = Me.BindingNavigatorMovePreviousItem
        Me.BindingNavigator.Name = "BindingNavigator"
        Me.BindingNavigator.PositionItem = Me.BindingNavigatorPositionItem
        Me.BindingNavigator.Size = New System.Drawing.Size(100, 25)
        Me.BindingNavigator.TabIndex = 0
        Me.BindingNavigator.Text = "BindingNavigator"
        '
        'BindingNavigatorAddNewItem
        '
        Me.BindingNavigatorAddNewItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorAddNewItem.Image = CType(resources.GetObject("BindingNavigatorAddNewItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorAddNewItem.Name = "BindingNavigatorAddNewItem"
        Me.BindingNavigatorAddNewItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorAddNewItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorAddNewItem.Text = "添加(&A)"
        '
        'BindingNavigatorCountItem
        '
        Me.BindingNavigatorCountItem.Name = "BindingNavigatorCountItem"
        Me.BindingNavigatorCountItem.Size = New System.Drawing.Size(35, 12)
        Me.BindingNavigatorCountItem.Text = "/ {0}"
        Me.BindingNavigatorCountItem.ToolTipText = "总项数"
        '
        'BindingNavigatorDeleteItem
        '
        Me.BindingNavigatorDeleteItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorDeleteItem.Image = CType(resources.GetObject("BindingNavigatorDeleteItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorDeleteItem.Name = "BindingNavigatorDeleteItem"
        Me.BindingNavigatorDeleteItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorDeleteItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorDeleteItem.Text = "删除(&D)"
        '
        'BindingNavigatorMoveFirstItem
        '
        Me.BindingNavigatorMoveFirstItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorMoveFirstItem.Image = CType(resources.GetObject("BindingNavigatorMoveFirstItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorMoveFirstItem.Name = "BindingNavigatorMoveFirstItem"
        Me.BindingNavigatorMoveFirstItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorMoveFirstItem.Size = New System.Drawing.Size(23, 22)
        Me.BindingNavigatorMoveFirstItem.Text = "第一条"
        '
        'BindingNavigatorMovePreviousItem
        '
        Me.BindingNavigatorMovePreviousItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorMovePreviousItem.Image = CType(resources.GetObject("BindingNavigatorMovePreviousItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorMovePreviousItem.Name = "BindingNavigatorMovePreviousItem"
        Me.BindingNavigatorMovePreviousItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorMovePreviousItem.Size = New System.Drawing.Size(23, 22)
        Me.BindingNavigatorMovePreviousItem.Text = "上一条"
        '
        'BindingNavigatorSeparator
        '
        Me.BindingNavigatorSeparator.Name = "BindingNavigatorSeparator"
        Me.BindingNavigatorSeparator.Size = New System.Drawing.Size(6, 25)
        '
        'BindingNavigatorPositionItem
        '
        Me.BindingNavigatorPositionItem.AccessibleName = "位置"
        Me.BindingNavigatorPositionItem.AutoSize = False
        Me.BindingNavigatorPositionItem.Name = "BindingNavigatorPositionItem"
        Me.BindingNavigatorPositionItem.Size = New System.Drawing.Size(50, 21)
        Me.BindingNavigatorPositionItem.Text = "0"
        Me.BindingNavigatorPositionItem.ToolTipText = "当前位置"
        '
        'BindingNavigatorSeparator1
        '
        Me.BindingNavigatorSeparator1.Name = "BindingNavigatorSeparator1"
        Me.BindingNavigatorSeparator1.Size = New System.Drawing.Size(6, 6)
        '
        'BindingNavigatorMoveNextItem
        '
        Me.BindingNavigatorMoveNextItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorMoveNextItem.Image = CType(resources.GetObject("BindingNavigatorMoveNextItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorMoveNextItem.Name = "BindingNavigatorMoveNextItem"
        Me.BindingNavigatorMoveNextItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorMoveNextItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorMoveNextItem.Text = "下一条"
        '
        'BindingNavigatorMoveLastItem
        '
        Me.BindingNavigatorMoveLastItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorMoveLastItem.Image = CType(resources.GetObject("BindingNavigatorMoveLastItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorMoveLastItem.Name = "BindingNavigatorMoveLastItem"
        Me.BindingNavigatorMoveLastItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorMoveLastItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorMoveLastItem.Text = "最后一条"
        '
        'BindingNavigatorSeparator2
        '
        Me.BindingNavigatorSeparator2.Margin = New System.Windows.Forms.Padding(4, 0, 4, 0)
        Me.BindingNavigatorSeparator2.Name = "BindingNavigatorSeparator2"
        Me.BindingNavigatorSeparator2.Size = New System.Drawing.Size(6, 6)
        '
        'BindingNavigatorEditItem
        '
        Me.BindingNavigatorEditItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorEditItem.Image = CType(resources.GetObject("BindingNavigatorEditItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorEditItem.Name = "BindingNavigatorEditItem"
        Me.BindingNavigatorEditItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorEditItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorEditItem.Text = "编辑(&E)"
        '
        'BindingNavigatorReplaceItem
        '
        Me.BindingNavigatorReplaceItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorReplaceItem.Image = CType(resources.GetObject("BindingNavigatorReplaceItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorReplaceItem.Name = "BindingNavigatorReplaceItem"
        Me.BindingNavigatorReplaceItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorReplaceItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorReplaceItem.Text = "查找和替换(&R)"
        '
        'BindingNavigatorImportItem
        '
        Me.BindingNavigatorImportItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorImportItem.Image = CType(resources.GetObject("BindingNavigatorImportItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorImportItem.Name = "BindingNavigatorImportItem"
        Me.BindingNavigatorImportItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorImportItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorImportItem.Text = "导入(&I)"
        '
        'BindingNavigatorConfirmItem
        '
        Me.BindingNavigatorConfirmItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorConfirmItem.Image = CType(resources.GetObject("BindingNavigatorConfirmItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorConfirmItem.Name = "BindingNavigatorConfirmItem"
        Me.BindingNavigatorConfirmItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorConfirmItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorConfirmItem.Text = "复核(&O)"
        '
        'BindingNavigatorSeparator3
        '
        Me.BindingNavigatorSeparator3.Margin = New System.Windows.Forms.Padding(4, 0, 4, 0)
        Me.BindingNavigatorSeparator3.Name = "BindingNavigatorSeparator3"
        Me.BindingNavigatorSeparator3.Size = New System.Drawing.Size(6, 6)
        '
        'BindingNavigatorFilterItem
        '
        Me.BindingNavigatorFilterItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorFilterItem.Image = CType(resources.GetObject("BindingNavigatorFilterItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorFilterItem.Name = "BindingNavigatorFilterItem"
        Me.BindingNavigatorFilterItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorFilterItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorFilterItem.Text = "搜索(&F)"
        '
        'BindingNavigatorPreviewItem
        '
        Me.BindingNavigatorPreviewItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorPreviewItem.Image = CType(resources.GetObject("BindingNavigatorPreviewItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorPreviewItem.Name = "BindingNavigatorPreviewItem"
        Me.BindingNavigatorPreviewItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorPreviewItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorPreviewItem.Text = "预览(&V)"
        '
        'BindingNavigatorPrintItem
        '
        Me.BindingNavigatorPrintItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorPrintItem.Image = CType(resources.GetObject("BindingNavigatorPrintItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorPrintItem.Name = "BindingNavigatorPrintItem"
        Me.BindingNavigatorPrintItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorPrintItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorPrintItem.Text = "打印(&P)"
        '
        'BindingNavigatorQueryItem
        '
        Me.BindingNavigatorQueryItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorQueryItem.Image = CType(resources.GetObject("BindingNavigatorQueryItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorQueryItem.Name = "BindingNavigatorQueryItem"
        Me.BindingNavigatorQueryItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorQueryItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorQueryItem.Text = "查询(&Q)"
        '
        'BindingNavigatorSeparator4
        '
        Me.BindingNavigatorSeparator4.Margin = New System.Windows.Forms.Padding(4, 0, 4, 0)
        Me.BindingNavigatorSeparator4.Name = "BindingNavigatorSeparator4"
        Me.BindingNavigatorSeparator4.Size = New System.Drawing.Size(6, 6)
        '
        'BindingNavigatorEnterItem
        '
        Me.BindingNavigatorEnterItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorEnterItem.Image = CType(resources.GetObject("BindingNavigatorEnterItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorEnterItem.Name = "BindingNavigatorEnterItem"
        Me.BindingNavigatorEnterItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorEnterItem.Size = New System.Drawing.Size(23, 20)
        Me.BindingNavigatorEnterItem.Text = "横向编辑(&T)"
        CType(Me.BindingNavigator, System.ComponentModel.ISupportInitialize).EndInit()
        Me.BindingNavigator.ResumeLayout(False)
        Me.BindingNavigator.PerformLayout()
        CType(Me, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub
    Friend WithEvents BindingNavigator As System.Windows.Forms.BindingNavigator
    Friend WithEvents BindingNavigatorAddNewItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorCountItem As System.Windows.Forms.ToolStripLabel
    Friend WithEvents BindingNavigatorDeleteItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorMoveFirstItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorMovePreviousItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorSeparator As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents BindingNavigatorPositionItem As System.Windows.Forms.ToolStripTextBox
    Friend WithEvents BindingNavigatorSeparator1 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents BindingNavigatorMoveNextItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorMoveLastItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorSeparator2 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents BindingNavigatorEditItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorImportItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorSeparator3 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents BindingNavigatorPrintItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorQueryItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorConfirmItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorReplaceItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorFilterItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorSeparator4 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents BindingNavigatorEnterItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorPreviewItem As System.Windows.Forms.ToolStripButton
    Public Overrides Sub AddStandardItems()
        MyBase.AddStandardItems()
        Me.Items.Add(Me.BindingNavigatorEditItem)
        Me.Items.Add(Me.BindingNavigatorReplaceItem)
        Me.Items.Add(Me.BindingNavigatorImportItem)
        Me.Items.Add(Me.BindingNavigatorConfirmItem)
        Me.Items.Add(Me.BindingNavigatorSeparator3)
        Me.Items.Add(Me.BindingNavigatorFilterItem)
        Me.Items.Add(Me.BindingNavigatorPreviewItem)
        Me.Items.Add(Me.BindingNavigatorPrintItem)
        Me.Items.Add(Me.BindingNavigatorQueryItem)
        Me.Items.Add(Me.BindingNavigatorSeparator4)
        Me.Items.Add(Me.BindingNavigatorEnterItem)
    End Sub
    Protected Overrides Sub RefreshItemsCore()
        MyBase.RefreshItemsCore()
        If Me.BindingSource Is Nothing Then
            Me.Enabled = False
        Else
            Me.Enabled = True
        End If
    End Sub
    Private EditModeValue As Boolean
    Public Property EditMode() As Boolean
        Get
            Return EditModeValue
        End Get
        Set(ByVal value As Boolean)
            EditModeValue = value
        End Set
    End Property

    Private Sub BindingNavigatorQueryItemClick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BindingNavigatorQueryItem.Click
        QueryDialog.ShowDialog()
    End Sub
End Class

 

Answer 11

你好！

     你把订阅事件的代码放到构造函数里！

     我不知道你是如何操作的，你是定义类，那窗体设计器生成的代码是怎么来的呢！

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周雪峰

Answer 12

你好，周版主！

    能否举例具体说明一下，如何在BindingNavigator上加一个按钮，并填写Click事件代码？

Answer 13

你好！

    我感觉是这样的，你可以多学习一些理论知识，你对事件订阅的原理可能不是很清楚！如果只是照着其他代码来模仿，很容易发生你上面遇到的问题，因为你不清楚例子里那么写的原因，所以就出现问题了！

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周雪峰