如何创建简单的ActiveX控件？ [英] How Can I Create a Simple ActiveX Control?

问题描述

我正在尝试创建真正的简单 ActiveX 控件。  我真的不在乎它现在做了什么。  我只想调用其中一种方法。  我得到"对象不支持属性或方法'PrintDocument'。"
 我错过了什么？  请参阅以下代码...

项目（C＃类库）：BrowserPrintDocument

注意：程序集是ComVisible，已签名并分配了GUID。  还有一个安装项目（BrowserPrintDocumentSetup）

• IBrowserPrinter.cs（界面）

使用System; 
使用System.Runtime.InteropServices; 
 
名称空间BrowserPrintDocument 
 {
 ///< summary> 
 ///此界面将方法公开给javascript 
 ///< / summary> 
 [Guid（" 68BD4E0D-D7BC-4CF6-BEB7-CAB950161E79"）] 
 [InterfaceType（ComInterfaceType.InterfaceIsIDispatch）] 
 public interface IBrowserPrinter 
 {
 / /将DispIdAttribute添加到源接口中的任何成员以指定COM DispId。 
 [DispId（0x60020001）] 
 void PrintDocument（）; 
} 
} 

• BrowserPrinter.cs（codebase）

使用System;使用System.Drawing 
; 
使用System.Drawing.Printing; 
使用System.Runtime.InteropServices; 
 
名称空间BrowserPrintDocument 
 {
 [ProgId（" BrowserPrinter"）] 
 [Guid（" 23F51170-D125-4665-9909-701B6F233AF2"）] 
 [ComVisible（true）] 
 [ClassInterface（ClassInterfaceType.None）] 
 public class BrowserPrinter：IBrowserPrinter 
 {
 [ComVisible（true）] 
 public void PrintDocument（）
 {
 var printDocument = new PrintDocument（）; 
 
 printDocument.PrintPage + =（sender，args）=> 
 {
 var image = Image.FromFile（@"C：\ Users \ Juulio.Bello \Pictures\untitled.png"）; 
 
 args.Graphics.DrawImage（image，0,0，image.Width，image.Height）; 
}; 
 
 printDocument.Print（）; 
} 
 
 /////< summary> 
 /////将类注册为控件并设置其CodeBase条目
 /////< / summary> 
 /////< param name =" key">控件的注册表项< / param> 
 // [ComRegisterFunction（）] 
 // public static void RegisterClass（s​​tring key）
 // {
 //} 
 
 /// //<总结> 
 /////被叫取消注册控件
 /////< / summary> 
 /////< param name =" key">注册表项< / param> 
 // [ComUnregisterFunction（）] 
 // public static void UnregisterClass（s​​tring key）
 // {
 //} 
} 
} 

项目（VB WebForm应用程序）：测试 BrowserPrinter

• BrowserPrinter.aspx

<％@ Page Language =" VB" AutoEventWireup = QUOT假QUOT;的CodeFile = QUOT; BrowserPrinter.aspx.vb"继承= QUOT; BrowserPrinter" ％GT; 
 
<！DOCTYPE html> 
 
< html xmlns =" http：//www.w3.org/1999/xhtml"> 
< head runat =" server"> 
< title>< / title> 
< / head> 
< body> 
< form id =" form1" RUNAT = QUOT;服务器"> 
< div> 
< object id =" BrowserPrinter"名称= QUOT; BrowserPrinter"的classid = QUOT; CLSID：23F51170-D125-4665-9909-701B6F233AF2"> 
< / div> 
< / form> 
< script type =" text / javascript"> 
函数OpenActiveX（）{
 try {
 document.BrowserPrinter.PrintDocument（）; 
} 
 catch（Err）{
 alert（Err.description）; 
} 
} 
 
 OpenActiveX（）; 
< / script> 
< / body> 
< / html> 
 

• BrowserPrinter.aspx.vb

< pre class ="prettyprint"> Partial Class BrowserPrinter
Inherits System.Web.UI.Page

End Class

什么我错过了吗？

解决方案

您的C＃代码实现了COM对象，但您的HTML代码需要ActiveX控件。一个合适的ActiveX控件需要实现其他几个接口。

我认为你不需要ActiveX控件。只需将您的HTML代码更改为：

 var BrowserPrinter = new ActiveXObject（" BrowserPrinter"）; // ProgID是参数
 BrowserPrinter.PrintDocument（）; 

并省略< div> ...< / div>

I am trying to create a really simple ActiveX control.  I don't REALLY care what it does for now.  I just want to be able to invoke one of its methods.  I get "Object doesn't support property or method 'PrintDocument'."  What am I missing?  Please see code below...

Project (C# Class Library): BrowserPrintDocument

Note: The assembly is ComVisible, signed and is assigned a GUID.  There is also a Setup project (BrowserPrintDocumentSetup)

• IBrowserPrinter.cs (interface)

using System;
using System.Runtime.InteropServices;

namespace BrowserPrintDocument
{
    /// <summary>
    /// This interface exposes methods to javascript
    /// </summary>
    [Guid("68BD4E0D-D7BC-4CF6-BEB7-CAB950161E79")]
    [InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
    public interface IBrowserPrinter
    {
        //Add a DispIdAttribute to any members in the source interface to specify the COM DispId.
        [DispId(0x60020001)]
        void PrintDocument();
    }
}

• BrowserPrinter.cs (codebase)

using System;
using System.Drawing;
using System.Drawing.Printing;
using System.Runtime.InteropServices;

namespace BrowserPrintDocument
{
    [ProgId("BrowserPrinter")]
    [Guid("23F51170-D125-4665-9909-701B6F233AF2")]
    [ComVisible(true)]
    [ClassInterface(ClassInterfaceType.None)]
    public class BrowserPrinter : IBrowserPrinter
    {
        [ComVisible(true)]
        public void PrintDocument()
        {
            var printDocument = new PrintDocument();

            printDocument.PrintPage += (sender, args) =>
            {
                var image = Image.FromFile(@"C:\Users\Julio.Bello\Pictures\untitled.png");

                args.Graphics.DrawImage(image, 0, 0, image.Width, image.Height);
            };

            printDocument.Print();
        }

        /////<summary>
        /////Register the class as a control and set its CodeBase entry
        /////</summary>
        /////<param name="key">The registry key of the control</param>
        //[ComRegisterFunction()]
        //public static void RegisterClass(string key)
        //{
        //}

        /////<summary>
        /////Called to unregister the control
        /////</summary>
        /////<param name="key">The registry key</param>
        //[ComUnregisterFunction()]
        //public static void UnregisterClass(string key)
        //{
        //}
    }
}

Project (VB WebForm Application): TestBrowserPrinter

• BrowserPrinter.aspx

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="BrowserPrinter.aspx.vb" Inherits="BrowserPrinter" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <object id="BrowserPrinter" name="BrowserPrinter" classid="clsid:23F51170-D125-4665-9909-701B6F233AF2">
        </div>
    </form>
    <script type="text/javascript">
        function OpenActiveX() {
            try {
                document.BrowserPrinter.PrintDocument();
            }
            catch (Err) {
                alert(Err.description);
            }
        }

        OpenActiveX();
    </script>
</body>
</html>

• BrowserPrinter.aspx.vb

Partial Class BrowserPrinter
    Inherits System.Web.UI.Page

End Class

What else am I missing?

解决方案

Your C# code implements a COM object but your HTML code is requiring an ActiveX control. A proper ActiveX control require the implementation of several other interfaces.

I don't think you require an ActiveX control. Simply change your HTML code to something like:

var BrowserPrinter = new ActiveXObject("BrowserPrinter"); //ProgID is the parameter
BrowserPrinter.PrintDocument();

and leave out the <div>...</div>

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