月度归档: 2017 年 12 月

  • ASP.NET MVC在Controller中,把JsonResult转为JSON字符串

    ASP.NET MVC在Controller中,把JsonResult转为JSON字符串

    string json = new System.Web.Script.Serialization.JavaScriptSerializer().Serialize(jsonResult.Data);
    Response.Write(json);

  • 使用System.IO.File.Create(path);创建的文件如何关闭

    使用System.IO.File.Create(path);创建的文件如何关闭

    FileStream fs =  System.IO.File.Create(path);
    fs.Close();

  • Qt发布程序

    使用下面的命令查看Hello.exe所依赖的DLL:

    windeployqt Hello.exe

    如果还有缺少的DLL,可以根据报错提示用 Everything 工具进行查找,然后放进程序目录就行了。

    qt quick 的程序要这样发布

    -qmldir 后面是qt的qml目录

     windeployqt daolan.exe -qmldir "D:\Qt\Qt5.8.0\5.8\mingw53_32\qml"
  • VC HttpClient

    一个 VC++ 中使用的 HttpClient 类,可以进行HTTP GET和POST,代码如下:

    HttpClient.h

    #pragma once
    #include <string>
    #include <vector>
    using namespace std;
    
    class CHttpClient
    {
    public:
    	CHttpClient(void);
    	~CHttpClient(void);
    
    	BOOL Get(LPCSTR url, string &result);
    };
    

    HttpClient.cpp

    #include "stdafx.h"
    #include "HttpClient.h"
    #include <wininet.h>   
    #pragma comment(lib, "wininet.lib") 
    
    
    CHttpClient::CHttpClient(void)
    {
    }
    
    CHttpClient::~CHttpClient(void)
    {
    }
    
    
    BOOL CHttpClient::Get(LPCSTR url, string &result)
    {
    	result.clear();
    
    	vector<char> v; 
    	const CHAR * szUrl = url; 
    	CHAR szAgent[] = ""; 
    	HINTERNET hInternet1 =  
    		InternetOpen(NULL,INTERNET_OPEN_TYPE_PRECONFIG,NULL,NULL,NULL); 
    	if (NULL == hInternet1) 
    	{ 
    		InternetCloseHandle(hInternet1); 
    		return FALSE; 
    	} 
    	HINTERNET hInternet2 =  
    		InternetOpenUrl(hInternet1,szUrl,NULL,NULL,INTERNET_FLAG_NO_CACHE_WRITE,NULL); 
    	if (NULL == hInternet2) 
    	{ 
    		InternetCloseHandle(hInternet2); 
    		InternetCloseHandle(hInternet1); 
    		return FALSE; 
    	} 
    	DWORD dwMaxDataLength = 500; 
    	PBYTE pBuf = (PBYTE)malloc(dwMaxDataLength*sizeof(TCHAR)); 
    	if (NULL == pBuf) 
    	{ 
    		InternetCloseHandle(hInternet2); 
    		InternetCloseHandle(hInternet1); 
    		return FALSE; 
    	} 
    	DWORD dwReadDataLength = NULL; 
    	BOOL bRet = TRUE; 
    	do  
    	{ 
    		ZeroMemory(pBuf,dwMaxDataLength*sizeof(TCHAR)); 
    		bRet = InternetReadFile(hInternet2,pBuf,dwMaxDataLength,&dwReadDataLength); 
    		for (DWORD dw = 0;dw < dwReadDataLength;dw++) 
    		{ 
    			v.push_back(pBuf[dw]); 
    		} 
    	} while (NULL != dwReadDataLength); 
    
    	vector<char>::iterator i; 
    	for(i=v.begin(); i!=v.end(); i++) 
    		result += *i;
    
    	return TRUE;
    }
  • ProcessStartInfo 一定要写全路径

    ProcessStartInfo 一定要写全路径,不然会出现一些莫明其妙的错误,比如开机自动启动时打不开。

    ProcessStartInfo p1 = new ProcessStartInfo($"{Application.StartupPath}\\PD101AHelper.exe", $"{address} \"{windowShowMsg.Trim()}\"  \"{zhShowMsg2 ?? ""}\"");
    
    p1.WindowStyle = ProcessWindowStyle.Hidden;
    Process.Start(p1);