如何在vb.net windows应用程序中打印html页面

本文关键字：打印 html 页面 应用程序 windows vb net | 更新日期: 2023-09-27 18:24:39

我正在使用vb.net开发一个windows应用程序，我有一个简单的html页面，其中有占位符，我将页面加载到流读取器中，替换占位符，然后我需要打印html内容，任何人都知道如何将html内容打印为html而不是源。vb.bet或c#中的P.S.代码可以。感谢

如何在vb.net windows应用程序中打印html页面

您可以使用WebBrowser控件来执行此操作。它将允许您在WinForms中显示HTML。

DocumentText属性将允许您设置一个表示要显示的HTML的字符串。

例如：

webBrowser.DocumentText = "<html><body><p>I like StackOverflow</p><body></html>";

之后，如果您想打印页面，您必须等到Document完成并调用WebBrowser的Print方法。MSDN展示了一种简单的方法：

private void PrintHelpPage()
{
    // Create a WebBrowser instance. 
    WebBrowser webBrowserForPrinting = new WebBrowser();
    // Add an event handler that prints the document after it loads.
    webBrowserForPrinting.DocumentCompleted +=
        new WebBrowserDocumentCompletedEventHandler(PrintDocument);
    // Set the Url property to load the document.
    webBrowserForPrinting.Url = new Uri(@"''myshare'help.html");
}
private void PrintDocument(object sender,
    WebBrowserDocumentCompletedEventArgs e)
{
    // Print the document now that it is fully loaded.
    ((WebBrowser)sender).Print();
    // Dispose the WebBrowser now that the task is complete. 
    ((WebBrowser)sender).Dispose();
}

您还应该考虑尝试使用方法PrintDialog，以确保问题不是您的打印配置。

以下是MSDN的链接：使用MSDN 上的WebBrowser控件打印

可能重复：打印WebBrowser控件内容

我使用下一个代码。我在更改页面方向时遇到了一个大问题，唯一有效的解决方案是在默认打印机上更改页面设置，直接使用注册表破解。

Sub printHTMLFile (FileName As String, Portrait As Boolean, Copies As Integer)
  Const PAGESET_KEY As String = "Software'Microsoft'Internet Explorer'PageSetup"
  If Copies < 1 Then Exit Sub
  Dim MyKey As RegistryKey = Registry.CurrentUser.OpenSubKey (PAGESET_KEY, True)
  Dim TempFooter As String = MyKey.GetValue ("footer").ToString ()
  Dim TempHeader As String = MyKey.GetValue ("header").ToString ()
  Dim TempBottom As String = MyKey.GetValue ("margin_bottom").ToString ()
  Dim TempLeft   As String = MyKey.GetValue ("margin_left").ToString ()
  Dim TempRight  As String = MyKey.GetValue ("margin_right").ToString ()
  Dim TempTop    As String = MyKey.GetValue ("margin_top").ToString ()
  MyKey.SetValue ("footer", String.Empty)
  MyKey.SetValue ("header", String.Empty)
  MyKey.SetValue ("margin_bottom", "0.40000")
  MyKey.SetValue ("margin_left",   "0.40000")
  MyKey.SetValue ("margin_right",  "0.40000")
  MyKey.SetValue ("margin_top",    "0.40000")
  MyKey.Close ()
  pageSet (Portrait)
  Dim WB As WebBrowser = New WebBrowser ()
  WB.Navigate (FileName)
  While WB.ReadyState <> WebBrowserReadyState.Complete
    'Thread.Sleep (100)
    Application.DoEvents ()
  End While
  For i As Integer = 1 To Copies
    WB.Print ()
  Next
  MyKey = Registry.CurrentUser.OpenSubKey (PAGESET_KEY, True)
  MyKey.SetValue ("footer",        TempFooter)
  MyKey.SetValue ("header",        TempHeader)
  MyKey.SetValue ("margin_bottom", TempBottom)
  MyKey.SetValue ("margin_left",   TempLeft)
  MyKey.SetValue ("margin_right",  TempRight)
  MyKey.SetValue ("margin_top",    TempTop)
  MyKey.Close ()
End Sub
Sub pageSet (Portrait As Boolean)
' page orientation settins on default printer
  Const DEVICE_KEY = "HKEY_CURRENT_USER'Software'Microsoft'Windows NT'CurrentVersion'Windows"
  Const DEVMODE_KEY = "HKEY_CURRENT_USER'Printers'DevModePerUser"
  Const DEFAULT_DEVMODE_KEY = "HKEY_LOCAL_MACHINE'SYSTEM'CurrentControlSet'Control'Print'Printers'"
  Dim DevStr As String = Registry.GetValue (DEVICE_KEY, "Device", String.Empty)
  Dim PrinterName As String = DevStr.Substring (0, (DevStr.IndexOf (",")))
  Dim DevMode() As Byte = Registry.GetValue (DEVMODE_KEY, PrinterName, Nothing)
  If DevMode Is Nothing Then
    DevMode = Registry.GetValue (DEFAULT_DEVMODE_KEY & PrinterName.Replace ("'"c, ","c), "Default DevMode", Nothing)
  End If
  If Portrait Then
    DevMode(76) = 1
  Else
    DevMode(76) = 2
  End If
  Registry.SetValue (DEVMODE_KEY, PrinterName, DevMode)
End Sub

在这个页面上，我发现了一个非常容易实现的非常紧凑的解决方案：

Dim printProcess As New Diagnostics.ProcessStartInfo()
printProcess.FileName = "YOUR_FILE_HERE.html"
printProcess.Verb = "print"
'printProcess.WindowStyle = ProcessWindowStyle.Hidden
Process.Start(printProcess)

希望它对本页面的未来访问者有用！

对于那些可能觉得这个简单的VB代码很有用的人，我打印我的html模板文档如下：

Dim PrintWebBrowser As New WebBrowser
AddHandler PrintWebBrowser.DocumentCompleted, AddressOf DocumentCompleted
PrintWebBrowser.DocumentText = "<!DOCTYPE html PUBLIC etc. etc. </html>"    
Private Sub DocumentCompleted(ByVal sender As Object, ByVal e As WebBrowserDocumentCompletedEventArgs)
    With DirectCast(sender, WebBrowser)
        If .ReadyState = WebBrowserReadyState.Complete Then
            .Print()
        End If
    End With
End Sub
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