從動態界面中刪除控件

Question

我正在開發一個c＃練習項目，目的是培養我的技能和學習新東西。我創建了一個由幾個控件組成的動態界面..當窗體被加載時，它將啓動一個numericUpDown和一個Button。當用戶在數字上選擇一個數字並點擊按鈕時，它將根據numericUpDown上選擇的數字生成儘可能多的文本框，並在生成的文本框旁邊生成一個刪除按鈕。我無法刪除文本框，當用戶點擊刪除按鈕

這是代碼，我有：

//生成文本框和按鈕

private void AssessmentButton_Click(object sender, EventArgs e) 
{ 
    int length = (int)this.NoAssesmentBoxlv4.Value; 
    for (int i = 0; i < length; i++) 
    { 
    textboxAssesmentName.Add(new TextBox()); 
    var p = new System.Drawing.Point(110, 260 + i * 25);      
    (textboxAssesmentName[i] as TextBox).Location = p; 
    (textboxAssesmentName[i] as TextBox).Size = new System.Drawing.Size(183, 20); 
    this.Lv4Tab.Controls.Add(textboxAssesmentName[i] as TextBox); 
    buttoRemove.Add(new Button()); 
    (buttoRemove[i] as Button).Location = new System.Drawing.Point(380, 260 + i * 25); 
    (buttoRemove[i] as Button).Text = @"x"; 
    (buttoRemove[i] as Button).BackColor = Color.Red; 
    (buttoRemove[i] as Button).ForeColor = Color.White; 
    (buttoRemove[i] as Button).Size = new System.Drawing.Size(22, 23); 
    this.Lv4Tab.Controls.Add(buttoRemove[i] as Button); 

    (buttoRemove[i] as Button).Click += this.buttoRemove_click; 
    } 
} 

下面是該soruce刪除按鈕的Click（此方法不編譯）

private void buttoRemove_click(object sender, EventArgs e) 
{ 
    foreach (Object obj in textboxAssesmentName) 
    { 
    // THIS LINE DOES NOT COMPILE!!! 
    this.Controls.Remove(textboxAssesmentName.Remove); 
    } 
} 

任何想法，將不勝感激

Answer 1

試着這麼做

foreach (var control in textboxAssesmentName) 
{ 
    this.Controls.Remove(control); 
} 

現有的代碼沒有任何意義。

又見
http://msdn.microsoft.com/en-us/library/82785s1h%28v=vs.80%29.aspx

Answer 2

我建議你使用Button的Tag屬性來存儲與它相關的TextBox。把它放在你的代碼，在你的循環插入此行：

(buttoRemove[i] as Control).Tag = textboxAssesmentName[i]; 

那麼你的事件處理程序是這樣的：

private void buttoRemove_click(object sender, EventArgs e) 
{ 
    this.Controls.Remove((sender as Control).Tag as Control); 
} 

編輯：這是我會寫代碼的方式（不包括錯別字）。

private void AssessmentButton_Click(object sender, EventArgs e) 
{ 
    int length = (int)this.NoAssesmentBoxlv4.Value; 
    for (int i = 0; i < length; i++) 
    { 
     TextBox t = new TextBox(); 
     System.Drawing.Point p = new System.Drawing.Point(110, 260 + i * 25);      
     t.Location = p; 
     t.Size = new System.Drawing.Size(183, 20); 

     Button b = new Button(); 
     b.Location = new System.Drawing.Point(380, 260 + i * 25); 
     b.Text = @"x"; 
     b.BackColor = Color.Red; 
     b.ForeColor = Color.White; 
     b.Size = new System.Drawing.Size(22, 23); 
     b.Click += new System.EventHandler(this.buttoRemove_click); 

     this.Lv4Tab.Controls.Add(t); 
     this.Lv4Tab.Controls.Add(b); 
     textboxAssesmentName.Add(t); 
     buttoRemove.Add(b); 
    } 
} 

private void buttoRemove_click(object sender, EventArgs e) 
{ 
    Control b = sender as Control; 
    Control t = b.Tag as Control; 
    this.Lv4Tab.Controls.Remove(t); 
    this.Lv4Tab.Controls.Remove(b); 
    textboxAssesmentName.Remove(t); 
    buttoRemove.Remove(b); 
}