這裡的項目項目名稱為: TestActivex
創建Windows窗體控件庫
在默認的用戶控件上,放置一個button,并創建單擊事件
在用戶控件放置button并創建單擊事件
3.創建IObjectSafety接口(重點)
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);
}
#region IObjectSafety 接口成員實現（直接拷貝即可）
private const string _IID_IDispatch = "{00020400-0000-0000-C000-000000000046}";
private const string _IID_IDispatchEx = "{a6ef9860-c720-11d0-9337-00a0c90dcaa9}";
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
[Guid("4a202141-e8fc-42c8-b061-5d2c5f5cd35d")] //記住這個Guid在頁面上使用,要用這個
public partial class UserControl1 : UserControl, IObjectSafety
{
//此處省略若幹代碼和事件代碼
}
在項目屬性,應用程序->程序集信息
設置項目的程序集信息
設置程序集com可見
設置項目的程序集信息
在項目屬性,生成->為com互操作注冊
設置項目的程序集信息
7.在頁面使用ActiveX控件在這之前,需要将Activex控件打包成應用程序,如果是vs2017的話,默認沒有打包工具,在vs2017的應用商店中安裝,搜索關鍵字 Installer 即可.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>測試Activex控件</title>
</head>
<body>
<!--控件id為clsid:後跟我們在控件類使用的guid,一定要一緻,是因為要通過這個guid查找注冊表,最終定位控件動态庫-->
<object id="TestActiveX" classid="clsid:4a202141-e8fc-42c8-b061-5d2c5f5cd35d" width="400" height="100">
</object>
</body>
</html>
看測試結果:
測試Activex控件是否可用
最重要的一步在AssemblyInfo.cs文件,添加以下代碼
//一定要加的
[assembly: AllowPartiallyTrustedCallers()]
1.在控件類,添加該函數
/// <summary>
/// 公開調用,該函數要public去修飾,其他和正常函數一樣
/// </summary>
/// <param name="txt">文本參數</param>
/// <returns>返回調用結果</returns>
public string TestActiveXMethod(string txt)
{
return $"hello {txt}";
}
2.在頁面上調用公開的csharp函數
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>測試Activex控件</title>
</head>
<body>
<!--控件id為clsid:後跟我們在控件類使用的guid,一定要一緻,是因為要通過這個guid查找注冊表,最終定位控件動态庫-->
<!--這個時候,已經不需要顯示控件了-->
<object id="TestActiveX" classid="clsid:4a202141-e8fc-42c8-b061-5d2c5f5cd35d" width="0" height="0"></object>
<input type="text" id="txtUserName" />
<input type="button" id="btnCallActiveX" value="調用Activex控件中的函數" />
<script>
var btnCallActiveX = document.getElementById('btnCallActiveX');
var txtUserName = document.getElementById('txtUserName');
btnCallActiveX.onclick=function(){
//調用ActiveX控件, 控件id 後跟控件公開的函數
var callResult = TestActiveX.TestActiveXMethod(txtUserName.value);
alert(callResult);
};
</script>
</body>
</html>
調用結果:
ActiveX調用公開的函數,進行和csharp交互操作
由于是遷移的文章,Activex現在用的比較少了,在特定的行業中還是有使用的,比如醫療行業軟件,不過使用的是越來越少.
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