printPreviewDialog如何导出Excel等其它格式的文件？

[etherealkite]

VS2005 WinForm中的PrintPreviewDialog控件预览时如何导出其它格式的文件？工具箱自带的这个控件没有导出功能哦，只能直接打印，现在我要求这个控件要像CrystalReportViewer一样能够导出其它Excel,PDF,Word等其它格式的文件,如何实现？如果用派生类的话，这个类该如何写？

[cxiaoxifeng]

可以把文件中的数据用Stream读出来，然后用PrintDocument把读到的数据一行行描绘出来预览，这样不管对什么文件都是一样的。

[etherealkite]

[Quote=引用 3 楼 cxiaoxifeng 的回复:]
可以把文件中的数据用Stream读出来，然后用PrintDocument把读到的数据一行行描绘出来预览，这样不管对什么文件都是一样的。
[/Quote]
数据是通过Grapics对象来描绘，关键是预览后的数据的导出问题？PrintPreviewDialog上的数据只能直接打印，不能导出哦！

[yilanwuyu123]

MARK 对其他文件格式的操作 都要建立对应的对象 进行操作才能使程序内部明白文件的格式 进行保存等操作

[etherealkite]

1楼说的有道理，Up一下，还有谁解决了这个问题没有？帮顶有分哦！

[allanli]

继承PrintPreviewDialog
获取工具栏
然后在工具栏添加自己的按钮
在按钮事件中添加导出代码

Imports System.Reflection
Imports System.Windows.Forms
Imports System.Resources

Public Class PrintPreviewDialogEx
    Inherits System.Windows.Forms.PrintPreviewDialog

    Protected WithEvents pToolBar As System.Windows.Forms.ToolBar
    Private nInitialImages As Integer
    Private AddedButtons As ArrayList

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        pToolBar = Me.ParentToolbar

        Dim b As Button = GetCloseButton()
        b.Text = "关闭"
        Me.Text = "打印预览"
        AddHandler pToolBar.ButtonClick, AddressOf AddedButtons_Click
    End Sub

    'Form overrides dispose to clean up the component list.
    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

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Public WithEvents AddedButtonsImageList As System.Windows.Forms.ImageList
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(PrintPreviewDialogEx))
        Me.AddedButtonsImageList = New System.Windows.Forms.ImageList(Me.components)
        '
        'AddedButtonsImageList
        '
        Me.AddedButtonsImageList.ImageSize = New System.Drawing.Size(16, 16)
        Me.AddedButtonsImageList.TransparentColor = System.Drawing.Color.Transparent
        '
        'PrintPreviewDialogEx
        '
        Me.ClientSize = New System.Drawing.Size(864, 543)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.Name = "PrintPreviewDialogEx"

    End Sub

#End Region

    Public Event AddedButtonsClick As System.Windows.Forms.ToolBarButtonClickEventHandler

    Private Sub AddedButtons_Click(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ToolBarButtonClickEventArgs)
        Dim i As Integer
        For i = 0 To AddedButtons.Count - 1
            If e.Button Is AddedButtons(i) Then
                RaiseEvent AddedButtonsClick(Me, e)
                Return
            End If
        Next
    End Sub

    Public Sub AddToolBarButtons(ByVal Buttons() As System.Windows.Forms.ToolBarButton)
        Dim imgList As ImageList = pToolBar.ImageList
        Dim i As Integer
        nInitialImages = imgList.Images.Count
        AddedButtons = New ArrayList
        For i = 0 To AddedButtonsImageList.Images.Count - 1
            imgList.Images.Add(AddedButtonsImageList.Images.Item(i))
        Next

        Dim initw As Integer = 0
        For i = 0 To Buttons.GetLength(0) - 1
            AddedButtons.Add(Buttons(i))
            If Buttons(i).ImageIndex >= 0 Then
                Buttons(i).ImageIndex += nInitialImages
            End If
            pToolBar.Buttons.Add(Buttons(i))
            initw += pToolBar.Buttons(pToolBar.Buttons.Count - 1).Rectangle.Width
        Next
        Dim s As System.Drawing.Size = Me.MinimumSize
        s.Width += initw
        Me.MinimumSize = s
        Dim b As Button = GetCloseButton()
        b.Left += initw
    End Sub

    Private Function GetCloseButton() As Button
        Dim fi As FieldInfo = GetType(System.Windows.Forms.PrintPreviewDialog).GetField("closeButton", BindingFlags.Public Or BindingFlags.NonPublic Or BindingFlags.Instance)
        Return CType(fi.GetValue(Me), System.Windows.Forms.Button)
    End Function

    Public ReadOnly Property ParentToolbar() As System.Windows.Forms.ToolBar
        Get
            Dim fi As FieldInfo = GetType(System.Windows.Forms.PrintPreviewDialog).GetField("toolBar1", BindingFlags.Public Or BindingFlags.NonPublic Or BindingFlags.Instance)
            Return CType(fi.GetValue(Me), System.Windows.Forms.ToolBar)
        End Get
    End Property

End Class

[live_7sky]

[Quote=引用 6 楼 etherealkite 的回复:]
引用 5 楼 live_7sky 的回复:

本来 就不提供导出功能 ，如果你要预览的时候，导出EXCEL ，
只有模拟一个页面，然后读取页面的内容，然后导出到EXCEL

怎么读取页面内容，然后导出Excel?可否提供代码参考。
[/Quote]

读取文本的方式，然后通过正则取来 。

[live_7sky]

本来 就不提供导出功能 ，如果你要预览的时候，导出EXCEL ，
只有模拟一个页面，然后读取页面的内容，然后导出到EXCEL

[etherealkite]

[Quote=引用 5 楼 live_7sky 的回复:]

本来 就不提供导出功能 ，如果你要预览的时候，导出EXCEL ，
只有模拟一个页面，然后读取页面的内容，然后导出到EXCEL
[/Quote]
怎么读取页面内容，然后导出Excel?可否提供代码参考。

[etherealkite]

不明白8楼说的意思？怎么读取预览页面的数据？