vb.net 教程 11-1 打印组件 2 PrintDialog 2

上一节介绍了PrintDialog的一些基础，这节继续介绍。

先说一下DefaultPageSettings，这个是默认的页面设置

其实个人感觉PrintDialog.DefaultPageSettings属性和PageSetupDialog.PageSettings属性有些重复。

虽然PrintDialog.DefaultPageSettings在msdn中显示是ReadOnly，但是还是可以设置的。

使用上一节的窗体，将按钮代码修改为以下内容：

    Private Sub Button2_Click(sender As Object,e As EventArgs) Handles Button2.Click
        Dim ps As Printing.PrinterSettings
        If PrintDialog1.ShowDialog = DialogResult.OK Then
            ps = PrintDialog1.PrinterSettings
        Else
            Exit Sub
        End If

        TextBox1.Text = "彩色打印：" & ps.DefaultPageSettings.Color & ControlChars.CrLf &
            "打印方向：" & IIf(ps.DefaultPageSettings.Landscape,"横向","竖向") & ControlChars.CrLf &
            "打印边距：" & ps.DefaultPageSettings.Margins.Top & "*" & ps.DefaultPageSettings.Margins.Bottom &
            "*" & ps.DefaultPageSettings.Margins.Left & "*" & ps.DefaultPageSettings.Margins.Right & ControlChars.CrLf &
            "打印机名称：" & ps.DefaultPageSettings.PrinterSettings.PrinterName

        ps.DefaultPageSettings.Color = False
        ps.DefaultPageSettings.Landscape = True
        ps.DefaultPageSettings.Margins = New Printing.Margins(10,10,10)
        ps.DefaultPageSettings.PrinterSettings.PrinterName = “Microsoft XPS Document Writer”

        TextBox1.Text = TextBox1.Text & ControlChars.CrLf & "---------------" & ControlChars.CrLf &
            "彩色打印：" & ps.DefaultPageSettings.Color & ControlChars.CrLf &
            "打印方向：" & IIf(ps.DefaultPageSettings.Landscape,"竖向") & ControlChars.CrLf &
            "打印边距：" & ps.DefaultPageSettings.Margins.Top & "*" & ps.DefaultPageSettings.Margins.Bottom &
            "*" & ps.DefaultPageSettings.Margins.Left & "*" & ps.DefaultPageSettings.Margins.Right & ControlChars.CrLf &
            "打印机名称：" & ps.PrinterName

    End Sub

运行效果如下：

最后一段代码，我特地用了 "打印机名称：" & ps.PrinterName，

Printing.PrinterSettings.DefaultPageSettings是一个Printing.PageSetting类。

Printing.PageSetting包含PrinterSettings属性，是一个Printing.PrinterSettings类。

这两个类相互包含无穷尽。

Printing.PrinterSettings.DefaultPageSettings.PrinterSettings.DefaultPageSettings……

另外顺带说一下，PrinterSettings有个比较重要的属性：InstalledPrinters，可以枚举当前安装的打印机，代码如下：

    Private Sub Button3_Click(sender As Object,e As EventArgs) Handles Button3.Click
        TextBox1.Text = ""
        For Each printerName As String In Printing.PrinterSettings.InstalledPrinters
            TextBox1.Text &= printerName & ControlChars.CrLf
        Next

    End Sub

运行效果如图：

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vb.net 教程 11-1 打印组件 2 PrintDialog 2

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