Question

我用C＃制作了一个Windows服务，现在把它变成了Windows窗体。（不要担心我做了必要的修改以使其工作）

所以现在突然间一些功能无法正常工作。表单不会给我一个错误，但它不会做它应该做的事情。这是一些相关代码：

    private void Start_Click(object sender, EventArgs e)
    {
        this.fileSystemWatcher1 = new System.IO.FileSystemWatcher();
        ((System.ComponentModel.ISupportInitialize)(this.fileSystemWatcher1)).BeginInit();
        fileSystemWatcher1.Path = source;
        fileSystemWatcher1.Created += new FileSystemEventHandler(fileSystemWatcher1_Created);
        fileSystemWatcher1.Changed += new FileSystemEventHandler(fileSystemWatcher1_Changed);
        fileSystemWatcher1.Deleted += new FileSystemEventHandler(fileSystemWatcher1_Deleted);
        fileSystemWatcher1.Renamed += new RenamedEventHandler(fileSystemWatcher1_Renamed);

        this.fileSystemWatcher1.EnableRaisingEvents = true;
        this.fileSystemWatcher1.IncludeSubdirectories = true;
        ((System.ComponentModel.ISupportInitialize)(this.fileSystemWatcher1)).EndInit();
        logger("Service started " + DateTime.Now);
    }

    public static void logger(String entry)
    {
        String logfile = ConfigurationManager.AppSettings[@"log"];
        if (File.Exists(@logfile))
        {
            using (System.IO.StreamWriter file = new System.IO.StreamWriter(@logfile, true))
            {
                file.WriteLine(entry);
            }
        }
        else
        {
            string[] lines = { entry };
            System.IO.File.WriteAllLines(@logfile, lines);
        }
    }

//some more functions as the logger.


private void fileSystemWatcher1_Created(object sender, System.IO.FileSystemEventArgs e)
    {

            cut_copy = ConfigurationManager.AppSettings[@"cutter"];
            logger("File created> " + e.FullPath + " -Date:" + DateTime.Now);
            filepath = Path.Combine(source, e.Name);
            name = Path.GetFileNameWithoutExtension(filepath);
            extension = Path.GetExtension(e.FullPath);
            size = e.Name.Length;

            strSelectCmd = "INSERT INTO" + tablepostgresql + " (" + column1 + "," + column2 + "," + column3 + "," + column4 + ") VALUES('" + name + "','" + size + "',now(),'" + extension + "')";
            readquery = "select * from " + tablemysql + " where name='" + name + "'";
            Mysql();
            postgresql();
            Record();

            if (string.IsNullOrEmpty(filename) == false)
            {
                if (Directory.Exists(e.FullPath))
                {
                    copyfolder();
                    Directory.CreateDirectory(target);
                }
                else
                {
                    if (WaitForFileAvailable(e.FullPath, TimeSpan.FromSeconds(30)))
                    {
                        var file = Path.Combine(source, e.Name);
                        var copy_file = Path.Combine(target, e.Name);
                        var destination = Path.Combine(target, Path.ChangeExtension(source, Path.GetExtension(source)));


                            if (File.Exists(file))// Check to see if the file exists. 
                            {                     //If it does delete the file in the target and copy the one from the source to the target.
                                File.Delete(copy_file);

                            }
                            File.Copy(e.FullPath, copy_file);

                    }
                    else // The file failed to become available within 10 seconds.
                    {
                        logger("Copy has failed reason: File is being used by another program");
                    }
                }
            }
            else
            {
                query = "INSERT INTO " + tablemysql + " (name,size,last_edit,extension) VALUES('" + name + "','" + size + "',now(),'" + extension + "')";
                Mysql();
            }
            variable_reset();

    }

我的问题是，按钮中的所有功能都正常工作，例如logger("Service started " + DateTime.Now);，但fileSystemWatcher1_Created不起作用（它什么都不做）。这可能只是一个非常愚蠢的问题，但我很困惑，自从我为此工作以来已经很长时间了。

Answer 1

将SynchronizingObject的属性FileSystemWatcher设置为您的表单：

this.fileSystemWatcher1 = new System.IO.FileSystemWatcher();
this.fileSystemWatcher1.SynchronizingObject = this;

FileSystemWatcher.SynchronizingObject Property@MSDN

处理更改，创建，删除和重命名事件时一个可视的Windows窗体组件，如Button，访问通过系统线程池的组件可能不起作用，或者可能导致例外。通过将SynchronizingObject设置为a来避免这种情况 Windows窗体组件，它导致处理该方法的方法已更改，创建，删除和重命名要在其上调用的事件创建组件的线程。

附注：属性SynchronizingObject为ISynchronizeInvoke，Control也为ISynchronizeInvoke。

从服务到表格突然不起作用

1 个答案: