c#中使用winhttp.dll

[crazybabycode]

请教,如题,怎么在c#中调用winhttp.dll,并操作winhttp.winhttprequest.5.1这个组件.

[crazybabycode]

恩,httpwebrequest会,刚学c#不长,想了解这方面的知识,希望懂的朋友指导下.

[ZengHD]

不用HttpWebRequest？
自己用API写？

[bloodish]

给你一个C++的实际例子,替换了一些敏感内容,你通过PInvoke照着写,应该没问题.

void UpdateData()
{
      
        HINTERNET hSession;
	HINTERNET hConnect;
	HINTERNET hRequest;
	BOOL httpResult;
	DWORD data;
	DWORD dwSize = sizeof(DWORD);
	LPWSTR pwszURL;
	DWORD dwStatusCode = 0;
	DWORD dwTemp = 0;
	
	CString szText=TEXT("www.google.com");

	// Use WinHttpOpen to obtain a session handle.
	hSession = WinHttpOpen(  L"HTTP Send Request Program/1.0", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
		WINHTTP_NO_PROXY_NAME, 
		WINHTTP_NO_PROXY_BYPASS, 0);
	if (!hSession)
		return FALSE;

	// Use WinHttpQueryOption to retrieve Internet options.
	httpResult = WinHttpQueryOption( hSession, WINHTTP_OPTION_CONNECT_TIMEOUT, &data, &dwSize);
	if (!httpResult)
		return FALSE;
	
	
	hConnect = WinHttpConnect( hSession, L"www.google.com", INTERNET_DEFAULT_HTTP_PORT, 0);
	if (!hConnect)
		goto END;

	// Open and Send a Request Header.
	hRequest = WinHttpOpenRequest( hConnect, L"GET", 
		szText,
		NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, 0);  
	if (!hRequest)
		goto END;
	httpResult = WinHttpSendRequest( hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0);
	if (!hRequest)
		goto END;
	httpResult = WinHttpReceiveResponse(hRequest, NULL);
	if (!hRequest)
		goto END;


	// Check the status code.
	httpResult = WinHttpQueryHeaders( hRequest, 
		WINHTTP_QUERY_STATUS_CODE|
		WINHTTP_QUERY_FLAG_NUMBER, NULL, 
		&dwStatusCode, &dwSize, NULL);
	
	if (httpResult)
	{
		switch (dwStatusCode)
		{
		case 200: 
			//  The resource was successfully retrieved.
			//  You could use WinHttpReadData to read the contents of the server's response.
			
			break;
		default:
			//  The status code does not indicate success.
			//printf("\nThe server responded with a status code of %i.", dwStatusCode);
			// error
			goto END;
			break;
		}
	}
END:
	// When finished, release the hRequest handle.
	httpResult = WinHttpCloseHandle(hRequest);
	if (!httpResult)
		return FALSE;

	// When finished, release the hConnect handle.
	httpResult = WinHttpCloseHandle(hConnect);
	if (!httpResult)
		return FALSE;

	// When finished, release the hSession handle.
	httpResult = WinHttpCloseHandle(hSession);
	if (!httpResult)
		return FALSE;


	return TRUE;
}

[huminghua]

在工具栏中点击选项卡 单击右键》添加 选择项 然后把dll文件添加进去你就可以用啦！

[crazybabycode]

谢谢,搞定了