检查是否从划伤的按钮上单击了按钮

Question

我有控制台应用程序，它像这样调用表单，我把它放在其他类只是为了让我的代码有条理。

我是这样从头开始制作表单代码的：

using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace Ultra_Script.MessageBoxes
{
    public class MsgBoxes
    {
        #region MsgBox k výběru základního SW (stažení z netu nebo Synology)
        public static void SynoInternet()
        {
            Application.EnableVisualStyles();
            Form SynoInternet = new Form();  

            Button Synology = new Button()
            {
                Left = 80,
                Width = 90,
                Height = 30,
                Top = 75,
                Text = "Synology"
            };

            Button Internet = new Button()
            {
                Left = 190,
                Width = 90,
                Height = 30,
                Top = 75,
                Text = "Internet"
            };

            Label SynoInternetLabel = new Label()
            {
                Left = 60,
                Width = 350,
                Height = 25,
                Top = 30,
                Text = "Chceš SW stáhnout z internetu nebo HD Synology?"
            };

            Label fasterLabel = new Label()
            {
                Left = 80,
                Width = 60,
                Height = 20,
                Top = 110,
                Text = "(Rychlejší)"
            };

            SynoInternet.Width = 380;
            SynoInternet.Height = 170;
            SynoInternet.Controls.Add(fasterLabel);
            SynoInternet.Controls.Add(SynoInternetLabel);
            SynoInternet.Controls.Add(Synology);
            SynoInternet.Controls.Add(Internet);
            SynoInternet.ShowDialog();

        }
        #endregion

    }
}

但不知道如何（在此类中）检查按钮是否被单击。

我知道我需要创建 EventHandler 但没有成功。

我试过这样：

  Synology.Click += (sender, args) =>
            {
                MessageBox.Show("You clicked Synology");
            };

我没有收到任何错误，但是当我单击 Synology 时没有任何反应。

有什么想法吗？

感谢所有回答，

约翰

Answer 1

你只需要做这个活动

       Synology.Click += (sender, args) =>
        {
            MessageBox.Show("You clicked Synology");
        }; 

showDialog() 方法之前；

showDialog 事件之后的行在 showDialog 方法返回值之前不会运行

另外，我认为您需要重新设计该类，以便能够正确处理它。

我希望这对你有用。

Answer 2

所以我还有一个问题。

我现在有这样的课：

using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace Ultra_Script.MessageBoxes
{
    public class MsgBoxes
    {
        #region MsgBox k výběru základního SW (stažení z netu nebo Synology)
        public static void SynoInternet()
        {
            Application.EnableVisualStyles();
            Form SynoInternet = new Form();  

            Button Synology = new Button()
            {
                Left = 80,
                Width = 90,
                Height = 30,
                Top = 75,
                Text = "Synology"
            };

            Button Internet = new Button()
            {
                Left = 190,
                Width = 90,
                Height = 30,
                Top = 75,
                Text = "Internet"
            };

            Label SynoInternetLabel = new Label()
            {
                Left = 60,
                Width = 350,
                Height = 25,
                Top = 30,
                Text = "Chceš SW stáhnout z internetu nebo HD Synology?"
            };

            Label fasterLabel = new Label()
            {
                Left = 80,
                Width = 60,
                Height = 20,
                Top = 110,
                Text = "(Rychlejší)"
            };

            SynoInternet.Width = 380;
            SynoInternet.Height = 170;
            SynoInternet.Controls.Add(fasterLabel);
            SynoInternet.Controls.Add(SynoInternetLabel);
            SynoInternet.Controls.Add(Synology);
            SynoInternet.Controls.Add(Internet);

            Synology.Click += (sender, args) =>
            {
                SynoInternet.Dispose();
                Installation_Functions.InstallBasicSW();
            };

            Internet.Click += (sender, args) =>
            {
                MessageBox.Show("You clicked Internet");
            };

            SynoInternet.ShowDialog();

        }
        #endregion

    }
}

InstallFunctions 类只调用这个文件下载器：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.ComponentModel;
using System.IO;
using System.Net;
using System.Threading;

namespace Ultra_Script
{
    class FileDownloader
    {

        private readonly string _url;
        private readonly string _fullPathWheretoSave;
        private bool _result = false;
        private readonly SemaphoreSlim _semaphore = new SemaphoreSlim(0);

        public FileDownloader(string url, string fullPathWheretoSave)
        {

            if (string.IsNullOrEmpty(url)) throw new ArgumentNullException("url");
            if (string.IsNullOrEmpty(fullPathWheretoSave)) throw new ArgumentNullException("fullPathWhereToSave");

            this._url = url;
            this._fullPathWheretoSave = fullPathWheretoSave;

        }

        public bool StartDownload(int timeout)
        {

            try
            {
                System.IO.Directory.CreateDirectory(Path.GetDirectoryName(_fullPathWheretoSave));

                if (File.Exists(_fullPathWheretoSave))
                {
                    File.Delete(_fullPathWheretoSave);
                }
                using (WebClient client = new WebClient())
                {
                    var ur = new Uri(_url);
                    //client.Credentials = new NetworkCredential("username", "password");
                    client.DownloadProgressChanged += WebClientDownloadProgressChanged;
                    client.DownloadFileCompleted += WebClientDownloadCompleted;
                    Console.WriteLine(@"Stahuji potrebne soubory:");
                    client.DownloadFileAsync(ur, _fullPathWheretoSave);
                    _semaphore.Wait(timeout);
                    return _result && File.Exists(_fullPathWheretoSave);
                }

            }
            catch (Exception e)
            {
                Console.WriteLine("Cant download file");
                Console.Write(e);
                return false;
            }
            finally
            {
                this._semaphore.Dispose();
            }

        }

        private void WebClientDownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            Console.Write($"/r --> {e.ProgressPercentage}%");  
        }

        private void WebClientDownloadCompleted(object sender, AsyncCompletedEventArgs args)
        {
            _result = !args.Cancelled;
            if (!_result)
            {
                Console.Write(args.Error.ToString());
            }
            Console.WriteLine(Environment.NewLine + "Download Finished!");
            _semaphore.Release();
        }

        public static bool DownloadFile(string url, string fullPathWhereToSave, int timeoutInMilliSec)
        {
            return new FileDownloader(url, fullPathWhereToSave).StartDownload(timeoutInMilliSec);
        }

    }

}

什么是关闭表单然后在控制台中运行返回功能。但它只说：“开始下载”，超时后它消失：异常抛出：Visual Studio 中 System.dll 中的“System.ComponentModel.Win32Exception”

当我逐步运行调试时，我认为它在那个 Semaphore 方法上停止了，但即使我在 filedownloader 中删除了这个方法，它也不起作用。

当我从控制台调用函数时，它正常工作的问题是只有当我通过消息框中的那个按钮调用它时。