這兩個按鈕的共用單擊事件處理代碼如下:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Linq; using System.Text; using System.Windows.Forms; namespace UcDll { public partial class UcTest : UserControl { public UcTest() { InitializeComponent(); } //定義委托 public delegate void BtnClickHandle(object sender, EventArgs e); //定義事件 public event BtnClickHandle UserControlBtnClicked; private void btn_Click(object sender, EventArgs e) { if (UserControlBtnClicked != null) UserControlBtnClicked(sender, new EventArgs());//把按鈕自身作為參數傳遞 } } }
在事件里可以找到UserControlBtnClicked事件。
private void ucTest1_UserControlBtnClicked(object sender, EventArgs e) { Button btn = sender as Button; MessageBox.Show(btn.Tag.ToString()); }
這個操作很有用。
url:http://greatverve.cnblogs.com/archive/2012/02/15/csharp-usercontrol-event.html
c# 自定義控件如何在屬性欄添加自定義事件?可以雙擊生成+=代碼?
用戶控件的實現比較簡單,直接從System.Windows.Forms.UserControl繼承。
public class UserControl1 : System.Windows.Forms.UserControl
為了便於測試我在上面添加了一個TextBox,並注冊TextBox的TextChanged事件,
this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
事件處理函數,
private void textBox1_TextChanged(object sender, System.EventArgs e) { MessageBox.Show(this.textBox1.Text); }
這里演示如果控件中文本框的內容改變就會用MessageBox顯示當前的文本框內容。
窗體中添加上面的用戶控件,當我們改變textBox的文本時,可以看到跳出一個對話框,很簡單吧。
下面來看看對控件添加屬性。
這里定義一個私有變量。
private string customValue;
添加訪問他的屬性
public string CustomValue { get{return customValue;} set{customValue =value;} }
在窗體中使用的時候像普通控件一樣進行訪問,
userControl11.CustomValue = "用戶控件自定義數據";
通過事件可以傳遞消息到窗體上,在定義之前我們先來寫一個簡單的參數類。
public class TextChangeEventArgs : EventArgs { private string message; public TextChangeEventArgs(string message) { this.message = message; } public string Message { get{return message;} } }
定義委托為,
public delegate void TextBoxChangedHandle(object sender,TextChangeEventArgs e);
接下去在用戶控件中添加事件,
//定義事件
public event TextBoxChangedHandle UserControlValueChanged;
為了激發用戶控件的新增事件,修改了一下代碼,
private void textBox1_TextChanged(object sender, System.EventArgs e)
{
if(UserControlValueChanged != null)
UserControlValueChanged(this,new TextChangeEventArgs(this.textBox1.Text));
}
好了,為了便於在Csdn上回答問題,把完整的代碼貼了出來:
using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Data; using System.Windows.Forms; namespace ZZ.WindowsApplication1 { public class UserControl1 : System.Windows.Forms.UserControl { private System.Windows.Forms.TextBox textBox1; private string customValue; private System.ComponentModel.Container components = null; public string CustomValue { get{return customValue;} set{customValue =value;} } //定義事件 public event TextBoxChangedHandle UserControlValueChanged; public UserControl1() { InitializeComponent(); } protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region組件設計器生成的代碼 private void InitializeComponent() { this.textBox1 = new System.Windows.Forms.TextBox(); this.SuspendLayout(); this.textBox1.Location = new System.Drawing.Point(12, 36); this.textBox1.Name = "textBox1"; this.textBox1.TabIndex = 0; this.textBox1.Text = "textBox1"; this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged); this.Controls.Add(this.textBox1); this.Name = "UserControl1"; this.Size = new System.Drawing.Size(150, 92); this.ResumeLayout(false); } #endregion private void textBox1_TextChanged(object sender, System.EventArgs e) { if(UserControlValueChanged != null) UserControlValueChanged(this,new TextChangeEventArgs(this.textBox1.Text)); } } //定義委托 public delegate void TextBoxChangedHandle(object sender,TextChangeEventArgs e); public class TextChangeEventArgs : EventArgs { private string message; public TextChangeEventArgs(string message) { this.message = message; } public string Message { get{return message;} } } }
使用時要在窗體中注冊上面的事件,比較簡單都貼源代碼了,
using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace ZZ.WindowsApplication1 { public class Form1 : System.Windows.Forms.Form { private WindowsApplication1.UserControl1 userControl11; private System.ComponentModel.Container components = null; public Form1() { InitializeComponent(); userControl11.CustomValue = "用戶控件自定義數據"; userControl11.UserControlValueChanged += newTextBoxChangedHandle(userControl11_UserControlValueChanged); } protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows 窗體設計器生成的代碼 private void InitializeComponent() { this.userControl11 = new WindowsApplication1.UserControl1(); this.SuspendLayout(); this.userControl11.Location = new System.Drawing.Point(8, 8); this.userControl11.Name = "userControl11"; this.userControl11.Size = new System.Drawing.Size(150, 84); this.userControl11.TabIndex = 0; this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(292, 193); this.Controls.Add(this.userControl11); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } #endregion [STAThread] static void Main() { Application.Run(new Form1()); } private void userControl11_UserControlValueChanged(object sender, TextChangeEventArgs e) { MessageBox.Show("當前控件的值為:" + e.Message); } } }
另外需要動態加載,就把控件添加在容器的Controls集合就行了,下面是在構造函數中添加控件,
public Form1() { InitializeComponent(); UserControl1 uc = new UserControl1(); uc.CustomValue = "動態加載的用戶控件"; uc.UserControlValueChanged += new TextBoxChangedHandle(userControl11_UserControlValueChanged); this.Controls.Add(uc); }
另外從VS.net中的工具箱中拖動用戶控件到窗體上,如果是第一次需要編譯一下項目。
//如果我有一個寫好的控件,想在Form中使用如何???????
在控件中:
public delegate void OnSubBureauSelectChanged();//定義委托
public event OnSubBureauSelectChanged onSubBureauSelectChanged;//定義事件
//以下代碼放在你要用在窗體中調用的事件中,可以是控件中有的也可以自己寫的
if ( ( subBureaus.Count > 0 ) && ( onSubBureauSelectChanged != null ) )
onSubBureauSelectChanged ();
//以下寫在窗體構造中
searchPanel.onSubBureauSelectChanged += new SearchPanel.OnSubBureauSelectChanged ( OnSubBureauSelectChanged );
//以下再寫一個自己寫的事件
private void OnSubBureauSelectChanged ( )
{這樣就可以了}
