如何在ASP中实现网络打印功能-小叶白龙博客

使用到的技术：
ASP,WSH,VBScript
文件ASPPrint.asp代码如下：

<%@ Language=VBScript %>
<%
Option Explicit

Dim strSubmit       ‘Form中用来保存提交按钮的值
Dim strPrinterPath ‘Form中保存网络打印机路径的值
Dim strUsername    ‘Form中用户名的值
Dim strPassword    ‘Form中密码的值
Dim strMessage    ‘Form打印内容的值
Dim objFS          ‘VBScript中的文件系统对象
Dim objWSHNet       ‘WSH中的网络对象
Dim objPrinter    ‘打印对象

strSubmit = Request.Form("Submit")
%>

<%
If strSubmit = "" Then
%>

注意的是：
由于我是演示起见，其中有关NT的帐号和密码都是使用了不加密的手段在
ASP中传递的
真正的运用中应该对该登录过程进行安全处理。
<FORM action="ASPPrint.asp" method=POST id=form name=form>
<TABLE WIDTH=100% ALIGN=center BORDER=0 CELLSPACING=1 CELLPADDING
=1>
   <TR>
      <TD ALIGN=right NOWRAP>网络打印机路径:</TD>
      <TD ALIGN=left NOWRAP><INPUT type="text" id=printerpath nam
e=printerpath
         value="\\< Domain >\< Printer >"></TD>
   </TR>
   <TR>
      <TD ALIGN=right NOWRAP>登录帐号:</TD>
      <TD ALIGN=left NOWRAP><INPUT type="text" id=username name=u
sername
         value="<% = strUsername %>"></TD>
   </TR>
   <TR>
      <TD ALIGN=right NOWRAP>登录口令:</TD>
      <TD ALIGN=left NOWRAP><INPUT type="password" id=password
         name=password></TD>
   </TR>
   <TR>
      <TD ALIGN=right NOWRAP>请输入你想打印的文字:</TD>
      <TD ALIGN=left NOWRAP><TEXTAREA rows=2 cols=20 id=message

         name=message></TEXTAREA></TD>
   </TR>
   <TR>
      <TD ALIGN=right NOWRAP> </TD>
      <TD ALIGN=left NOWRAP><INPUT type="submit" value="Submit"

id=submit name=submit></TD>
</TR>
</TABLE>
</FORM>

当以上信息被提交后，就可以按照下面的代码进行打印了。
<%
Else
‘ 从form中取得响应信息。
strPrinterPath = Request.Form("printerpath")
strUsername = Request.Form("username")
strPassword = Request.Form("password")
strMessage = Request.Form("message")

We will now use the VBScript FileSystemObject object and the WSH Net
work object. The Network object will
give us the methods we need to open a printer connection, and the Fi
leSystemObject will allow us to stream our
output to the printer. We create these objects in the following code
example:

Set objFS = CreateObject("Scripting.FileSystemObject")
Set objWSHNet = CreateObject("WScript.Network")
‘ 使用WSH连接网络打印机
objWSHNet.AddPrinterConnection "LPT1", strPrinterPath, False, str
Username, strPassword
‘ 使用文件系统对象将打印设备作为一个文件使用
Set objPrinter = objFS.CreateTextFile("LPT1:", True)
‘ 给打印设备送出文本
objPrinter.Write(strMessage)
‘关闭打印设备对象并进行错误陷阱处理
On Error Resume Next
objPrinter.Close
‘ 如果发生错误，关闭打印连接，并输出错误信息
If Err Then
   Response.Write ("Error # " & CStr(Err.Number) & " " & Err.Desc
ription)
   Err.Clear
Else
   ‘ 操作成功，输出确认信息
   Response.Write("<CENTER>")
   Response.Write("<TABLE WIDTH=100% ALIGN=center BORDER=0 CELLSP
ACING=1 CELLPADDING=1>")
   Response.Write("<TR><TD ALIGN=RIGHT><B>打印消息送出:</B></TD>"
)
   Response.Write("<TD ALIGN=LEFT>" & strMessage & "</TD></TR>")

   Response.Write("<TR><TD ALIGN=RIGHT><B>网络打印机路径:</B></TD
>")
   Response.Write("<TD ALIGN=LEFT>" & strPrinterPath & "</TD></TR
>")
   Response.Write("<TR><TD ALIGN=RIGHT><B>登录帐号:</B></TD>")
   Response.Write("<TD ALIGN=LEFT>" & strUsername & "</TD></TR>")

   Response.Write("</TABLE>")
   Response.Write("</CENTER>")
End If
‘ 取消打印连接
objWSHNet.RemovePrinterConnection "LPT1:"
Set objWSHNet = Nothing
Set objFS    = Nothing
Set objPrinter = Nothing
End If
%>
</BODY>
</HTML>