C#ActiveX控件開發學習

時間 2019-12-02

標籤 c#activex activex 控件開發學習欄目 C&C++ 简体版

原文原文鏈接

一：C#ActiveX控件開發注意事項html

1:C#開發的ActiveX控件只可在裝有Framework的系統上才能用。

2:只有IE瀏覽器支持。

3:初次安裝須要導入代碼簽名證書及其證書鏈的方式,

或者Windows其實默認內置了一些權威的CA機構證書，能夠向這些機構申請一份代碼簽名證書及私鑰文件來對ActiveX控件簽名，這樣就能夠避免該問題了。可是，向權威的CA機構申請證書是須要付費的，因此須要權衡成本和易用性後，再作出選擇。

二：開發步驟web

ActiveX控件之前也叫作OLE控件，它是微軟IE支持的一種軟件組件或對象，能夠將其插入到Web頁面中，實如今瀏覽器端執行動態程序功能，以加強瀏覽器端的動態處理能力。一般ActiveX控件都是用C++或VB語言開發，本文介紹另外一種方式，在.NET Framework平臺上，使用C#語言開發ActiveX控件。

1:必須繼承並實現IObjectSafety接口瀏覽器

[ComImport, GuidAttribute("CB5BDC81-93C1-11CF-8F20-00805F2CD064")]

[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]

public interface IObjectSafety

{

[PreserveSig]

int GetInterfaceSafetyOptions(ref Guid riid, [MarshalAs(UnmanagedType.U4)] ref int pdwSupportedOptions, [MarshalAs(UnmanagedType.U4)] ref int pdwEnabledOptions);

[PreserveSig()]

int SetInterfaceSafetyOptions(ref Guid riid, [MarshalAs(UnmanagedType.U4)] int dwOptionSetMask, [MarshalAs(UnmanagedType.U4)] int dwEnabledOptions);

}

2：一般咱們會先定義這麼一個控件基類去實現改接口ui

ActiveXControl控件基類spa

public abstract class ActiveXControl : IObjectSafetyorm

{htm

#region IObjectSafety 成員對象

private const string _IID_IDispatch = "{00020400-0000-0000-C000-000000000046}";繼承

private const string _IID_IDispatchEx = "{a6ef9860-c720-11d0-9337-00a0c90dcaa9}";接口

private const string _IID_IPersistStorage = "{0000010A-0000-0000-C000-000000000046}";

private const string _IID_IPersistStream = "{00000109-0000-0000-C000-000000000046}";

private const string _IID_IPersistPropertyBag = "{37D84F60-42CB-11CE-8135-00AA004BB851}";

private const int INTERFACESAFE_FOR_UNTRUSTED_CALLER = 0x00000001;

private const int INTERFACESAFE_FOR_UNTRUSTED_DATA = 0x00000002;

private const int S_OK = 0;

private const int E_FAIL = unchecked((int)0x80004005);

private const int E_NOINTERFACE = unchecked((int)0x80004002);

private bool _fSafeForScripting = true;

private bool _fSafeForInitializing = true;

public int GetInterfaceSafetyOptions(ref Guid riid, ref int pdwSupportedOptions, ref int pdwEnabledOptions)

{

int Rslt = E_FAIL;

string strGUID = riid.ToString("B");

pdwSupportedOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA;

switch (strGUID)

{

case _IID_IDispatch:

case _IID_IDispatchEx:

Rslt = S_OK;

pdwEnabledOptions = 0;

if (_fSafeForScripting == true)

pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER;

break;

case _IID_IPersistStorage:

case _IID_IPersistStream:

case _IID_IPersistPropertyBag:

Rslt = S_OK;

pdwEnabledOptions = 0;

if (_fSafeForInitializing == true)

pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA;

break;

default:

Rslt = E_NOINTERFACE;

break;

}

return Rslt;

}

public int SetInterfaceSafetyOptions(ref Guid riid, int dwOptionSetMask, int dwEnabledOptions)

{

int Rslt = E_FAIL;

string strGUID = riid.ToString("B");

switch (strGUID)

{

case _IID_IDispatch:

case _IID_IDispatchEx:

if (((dwEnabledOptions & dwOptionSetMask) == INTERFACESAFE_FOR_UNTRUSTED_CALLER) &&

(_fSafeForScripting == true))

Rslt = S_OK;

break;

case _IID_IPersistStorage:

case _IID_IPersistStream:

case _IID_IPersistPropertyBag:

if (((dwEnabledOptions & dwOptionSetMask) == INTERFACESAFE_FOR_UNTRUSTED_DATA) &&

(_fSafeForInitializing == true))

Rslt = S_OK;

break;

default:

Rslt = E_NOINTERFACE;

break;

}

return Rslt;

}

#endregion

}

3：實現本身的ActiveX控件功能開發

MacActiveX控件類
[Guid("65D8E97F-D3E2-462A-B389-241D7C38C518")]
public class MacActiveX : ActiveXControl
{
     public string GetMacAddress()
     {
         var mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
         var mos = mc.GetInstances();
         var sb = new StringBuilder();

         foreach (ManagementObject mo in mos)
         {
             var macAddress = mo["MacAddress"];

             if (macAddress != null)
                 sb.AppendLine(macAddress.ToString());
         }

         return sb.ToString();
     }
}