作者: admin

  • Qt  quick Image从文件中加载图片

    Qt  quick Image 从文件中加载图片:

    Image{
        width: parent.width
        height: parent.height
        source: "file:./images/home.png"
    }

    注意,当前目录是批Qt Creater中设置的工作目录

  • PDO execute()和exec()的区别

    PDO execute()和exec()的区别如下:

    exec() 执行一条sql语句,返回受影响的行数,此函数不返回结果集合。

    execute()函数 用于执行已经预处理过的语句,返回结果只有成功或失败。预处理要使用prepare函数

    使用execute()如果要获取受影响的行数,可以在调用execute()后 调用: $stmt->rowCount();来获取受影响的行数

  • php.ini 打开错误信息

    php.ini 打开错误信息,修改如下配置:

    display_errors=On
    error_reporting = E_ALL | E_STRICT

    如果使用apache,则要在httpd.conf最后添加 

    php_flag display_errors on
    php_value error_reporting 2039

    最后重启apache

  • 反射实现 WPF 按钮的  PerformClick 

    反射实现 WPF 按钮的  PerformClick:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Reflection;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Controls.Primitives;
    namespace cmbc
    {
        static public class  ButtonEx
        {
            public static void PerformClick(this ButtonBase button)
            {
                var method = button.GetType().GetMethod("OnClick",
                    BindingFlags.NonPublic | BindingFlags.Instance);
                if (method != null)
                {
                    method.Invoke(button, null);
                }
                //button.Focus();
            }
        }
    }
  • Qt Quick 中最大化窗体

    Qt Quick 中最大化窗体:

    import QtQuick 2.5
    import QtQuick.Window 2.2
    
    Window {
        visible: true
       // width: 640
       // height: 480
    
             visibility: "Maximized" // 全屏使用 FullScreen
    
        title: qsTr("民生银行触摸屏程序")
    
        MainForm {
            anchors.fill: parent
            mouseArea.onClicked: {
                Qt.quit();
            }
    
        }
    }
  • WPF对某个元素进行淡入淡出

    WPF对某个元素进行淡入淡出,例如对 ImagePage 元素进行淡入淡出,代码如下:

    淡入

    daV = new DoubleAnimation(0, 1, new Duration(TimeSpan.FromSeconds(1)));
    this.ImagePage.BeginAnimation(UIElement.OpacityProperty, daV);

    淡出

    DoubleAnimation daV = new DoubleAnimation(1, 0, new Duration(TimeSpan.FromSeconds(1)));
    this.ImagePage.BeginAnimation(UIElement.OpacityProperty, daV);
  • electron中使用jquery

    electron中使用jquery:

    <!-- Insert this line above script imports  -->
    <script>if (typeof module === 'object') {window.module = module; module = undefined;}</script>
    <!-- normal script imports etc  -->
    <script src="js/jquery.min.js"></script>       
    <!-- Insert this line after script imports -->
    <script>if (window.module) module = window.module;</script>
    
    <script>   
        $(function(){
            var winHeight = document.documentElement.clientHeight;
            var winWidth = document.documentElement.clientWidth;
            $('.wrapper').css('width', winWidth);
        });
    </script>


    见 https://segmentfault.com/q/1010000004703629

  • asp.net core上传文件

    asp.net core上传文件:

    public class BannerController : Controller
    {
    
            private ApplicationDbContext _db;
            private IHostingEnvironment _environment;   
            public BannerController(ApplicationDbContext db, IHostingEnvironment environment)
            {
                _db = db;
                _environment = environment;
            }
    
    
            [HttpPost]
            [ValidateAntiForgeryToken]
            public async Task<IActionResult> Create(BannerCreateViewModel viewModel)
            {
                if (ModelState.IsValid)
                {
                    var file = viewModel.PicFile;
                    var uploads = Path.Combine(_environment.WebRootPath, "uploads/images");
                    var ext = Path.GetExtension(file.FileName);//获得文件扩展名
                    var timeStamp = DateTimeOffset.Now.ToUnixTimeSeconds();
                    var saveName = $"{timeStamp}{ext}";//实际保存文件名
                    using (var fileStream = new FileStream(Path.Combine(uploads, saveName), FileMode.Create))
                    {
                        await file.CopyToAsync(fileStream);
                    }
                    viewModel.Pic = saveName;
                    var model = Mapper.Map<BannerCreateViewModel, Banner>(viewModel);
                    _db.Banner.Add(model);
                    _db.SaveChanges();
                    return RedirectToAction(nameof(Index));
                }
                else
                {
                    return View(viewModel);
                }
            }
    }

  • asp-action 等taghelper不高亮的解决办法

    asp-action 等 taghelper 不高亮的解决办法:

    在_ViewImports.cshtml中添加

    @addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

    即可

  • PHP 解决curl_exec直接显示内容的问题

    PHP 解决curl_exec直接显示内容的问题。

    调用curl_exec会直接显示接收到的内空,而不是保存在变量中,这个问题可以通过设置:

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 

    来解决

    function getRemoteData() {
        //echo 'from remote';
        $url = 'http://www.6166.cc/game/lotteryServlet?type=showBet&isNewLottery=true&lotteryId=9' ;
        $ch = curl_init($url );
        curl_setopt($ch,CURLOPT_HTTPHEADER,array('Host:www.6166.cc','Upgrade-Insecure-Requests:1'));
        curl_setopt($ch,CURLOPT_USERAGENT,"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36");
        curl_setopt($ch,CURLOPT_COOKIESESSION,true);
        curl_setopt ($ch, CURLOPT_TIMEOUT,500 );
        curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie.txt');
        curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookie.txt');
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1); // 获取302跳转之后的内容
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  // 如果不加此句,则curl_exec会直接显示内容,而不是把内容保存到返回值中
        $ret = curl_exec($ch);
    
        curl_close($ch);   
        return $ret;
    }