使控件動態識別另一個

Question

我有一個應用程序Windows窗體，其中我創建了動態控件，並且我需要像按鍵一樣的程序事件，但是我無法做到這一點，因爲一旦它們只存在於運行時就不會彼此認識。 （我」對不起：英語由谷歌Tradutor）

Answer 1

這個問題似乎是，你是在本地創建的動態變量：

ComboBox c1 = new Combobox(); 
TextBox t1 = new TextBox(); 

更改jacqijvv的回答有點看起來更像什麼，我相信你正在努力實現。我還要假設您有彼此相關的多個文本框/組合框對，所以你可以將它們存儲在一個Dictionary對象在事件處理程序取回這些數據：

public partial class Form1 : Form 
{ 
    public Dictionary<TextBox, ComboBox> _relatedComboBoxes; 
    public Dictionary<ComboBox, TextBox> _relatedTextBoxes; 

    public Form1() 
    { 
     InitializeComponent(); 

     _relatedComboBoxes = new Dictionary<TextBox, ComboBox>(); 
     _relatedTextBoxes = new Dictionary<ComboBox, TextBox>(); 

     TextBox textBox = new TextBox(); 
     textBox.Text = "Button1"; 
     textBox.KeyDown += textBox_KeyDown; 

     ComboBox comboBox = new ComboBox(); 
     // todo: initialize combobox.... 
     comboBox.SelectedIndexChanged += comboBox_SelectedIndexChanged; 


     // add our pair of controls to the Dictionaries so that we can later 
     // retrieve them together in the event handlers 
     _relatedComboBoxes.Add(textBox, comboBox); 
     _relatedTextBoxes.Add(comboBox, textBox); 

     // add to window 
     this.Controls.Add(comboBox); 
     this.Controls.Add(textBox); 

    } 

    void comboBox_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     ComboBox comboBox = sender as ComboBox; 
     TextBox textBox = _relatedTextBoxes[comboBox]; 
     // todo: do work 
    } 

    void textBox_KeyDown(object sender, KeyEventArgs e) 
    { 
     TextBox textBox = sender as TextBox; 
     // find the related combobox 
     ComboBox comboBox = _relatedComboBoxes[textBox]; 

     // todo: do your work 

    } 
} 

Answer 2

你可以試試下面的代碼：

public partial class Form1 : Form 
{ 
    // Create an instance of the button 
    TextBox test = new TextBox(); 

    public Form1() 
    { 
     InitializeComponent(); 
     // Set button values 
     test.Text = "Button"; 

     // Add the event handler 
     test.KeyPress += new KeyPressEventHandler(this.KeyPressEvent); 

     // Add the textbox to the form 
     this.Controls.Add(test); 
    } 


    // Keypress event 
    private void KeyPressEvent(object sender, KeyPressEventArgs e) 
    { 
     MessageBox.Show(test.Text); 
    } 
} 

這應該工作。