Form1_Load的不叫（嘗試有一個BackgroundWorker）

Question

我開發簡單的Windows窗體在C＃

我想說明一個GUI，然後在後臺啓動一些任務中的應用。我想在表單中使用文本標籤來顯示這些任務的進度。

Program.cs中是非常簡單的：

static void Main() 
    {  
     Application.EnableVisualStyles(); 
     Application.SetCompatibleTextRenderingDefault(false); 

     Form mainForm = (new Form1()); 

     Application.Run(mainForm); 
    } 

對於標籤我用結合

partial class Form1 : INotifyPropertyChanged 
{ 
    public string Title 
    { 
     get { return _title; } 
     set 
     { 
      _title = value; 
      if(PropertyChanged != null) 
      { 
       PropertyChanged(this, new PropertyChangedEventArgs("Title")); 
      } 
     } 


private void InitializeComponent() 
    { 
     this.label1 = new System.Windows.Forms.Label(); 
     this.SuspendLayout(); 
     // 
     // label1 
     // 
     this.label1.AutoSize = true; 
     this.label1.DataBindings.Add(new System.Windows.Forms.Binding("Text", this, "Title", true)); 
     this.label1.Location = new System.Drawing.Point(12, 9); 
     this.label1.Name = "label1"; 
     this.label1.Size = new System.Drawing.Size(46, 17); 
     this.label1.TabIndex = 0; 
     this.label1.Text = "label1"; 
     // 
     // Form1 
     // 
     this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F); 
     this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; 
     this.ClientSize = new System.Drawing.Size(763, 255); 
     this.Controls.Add(this.label1); 
     this.Name = "Form1"; 
     this.Text = "Form1"; 
     this.ResumeLayout(false); 
     this.PerformLayout(); 


    } 
private string _title = "xxgg"; 
    private System.Windows.Forms.Label label1; 

    public event PropertyChangedEventHandler PropertyChanged; 

然後我想運行一個後臺工作，但由於某種原因 Form1_Load方法沒有執行。

private void Form1_Load(object sender, System.EventArgs e) 
    { 
     System.Console.WriteLine("Form loaded"); 

     var bw = new BackgroundWorker(); 
     bw.DoWork += bw_DoWork; 
     bw.RunWorkerAsync(); //Start the worker 
    } 

void bw_DoWork(object sender, DoWorkEventArgs e) 
    { 
     InfoText it = new InfoText(); 
     FileMover fm = new FileMover(it); 

     foreach(string path in sourcePaths) 
     { 
      fm.MoveFrom(path); 
      this.Title = it.text; 
     } 
    } 

正如你所看到的，我想在運行後臺工作時更新標題。

我的Form1_Load沒有被調用的原因是什麼？謝謝

編輯： 我加入BackgroundWorker的代碼在Form1類是這樣的：

public partial class Form1 : Form 
{ 
    BackgroundWorker bw; 

    public Form1() 
    { 
     InitializeComponent();   

     it = new InfoText(); 

     bw = new BackgroundWorker(); 
     bw.DoWork += bw_DoWork; 
     bw.WorkerReportsProgress = true; 
     bw.ProgressChanged += Bw_ProgressChanged; 
     bw.RunWorkerCompleted += Bw_RunWorkerCompleted; 
     bw.RunWorkerAsync(); //Start the worker 
    } 

    private void Bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) 
    { 
     Console.WriteLine("done"); 

     this.Title = it.text; 
    } 

    private void Bw_ProgressChanged(object sender, ProgressChangedEventArgs e) 
    { 
     Console.WriteLine("progress changed " + e.ProgressPercentage); 

     this.Title = it.text; 
    } 

    void bw_DoWork(object sender, DoWorkEventArgs e) 
    { 
     FileMover fm = new FileMover(it); 

     foreach(string path in sourcePaths) 
     { 
      fm.MoveFrom(path); 
      bw.ReportProgress(1); 
     } 
    } 
} 

現在它正是我想要的。

Answer 1

添加

this.Load += new System.EventHandler(Form1_Load); 

裏面的InitializeComponent ...或類的構造函數。

我想通過GUI設計器添加它，它更安全，更簡單。