谁有空讲一下private void button1_Click(object sender, System.EventArgs e) 里的sender和e是干什么用的,msdn上讲解,我没看懂

duancj_1981 2006-01-19 05:49:43

谁有空讲一下private void button1_Click(object sender, System.EventArgs e){} 里的sender和e是干什么用的,msdn上的讲解不太好懂.
最好通俗一点.

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xvting 2006-01-19

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SENDER

ｂｕｔｔｏｎ的ｃｌｉｃｋ继承自ｃｏｎｔｒｏｌ

ｃｏｎｔｒｏｌ的ｃｌｉｃｋ代码
protected virtual void OnClick(EventArgs e)
{
if (this.CanRaiseEvents)
{
EventHandler handler1 = (EventHandler) base.Events[Control.EventClick];
if (handler1 != null)
{
handler1(this, e);
}
}
}

handler1(this, e);

这里传递给ｓｅｎｄｅｒ的是ｔｈｉｓ，所以这里的ｓｅｎｄｅｒ是这个ｂｕｔｔｏｎ自己

jackeyooo 2006-01-19

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sender 就是发出这个事件的对象阿，e代表一些参数，比如鼠标的枚举值等

xvting 2006-01-19

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sender 就是这个button1
e：存放一些传递参数　　EventArgs 顾名思义就是关于这个事件的一些参数

System.EventArgs 里的参数比较贫乏

看
private void button1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)

ｅ里面包含了，是哪个鼠标ＤＯＷＮ了，鼠标点的Ｘ，Ｙ坐标等内容

简单的C#计算器，但很实用 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace calculator { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Btn_Clear_Click(object sender, EventArgs e) { txt_Result.Text =" "; } private void button0_Click(object sender, EventArgs e) { Button btn=(Button) sender; txt_Result .Text +=btn.Text ; } private void Form1_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text += btn.Text; } private void button2_Click(object sender, EventArgs e) { Button btn=(Button) sender; txt_Result .Text +=btn.Text ; } private void button3_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text += btn.Text; } private void button4_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text += btn.Text; } private void button5_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text += btn.Text; } private void button6_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text += btn.Text; } private void button7_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text += btn.Text; } private void button8_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text += btn.Text; } private void button9_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text += btn.Text; } private void btn_Add_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text = txt_Result.Text + " " + btn.Text + " "; } private void btn_Result_Click(object sender, EventArgs e) { double d_result; string s_txt = txt_Result.Text; int space = s_txt.IndexOf(' '); string s1 = s_txt.Substring(0, space); char operation =System. Convert.ToChar(s_txt.Substring((space + 1), 1)); string s2 = s_txt.Substring(space + 3); double arg1 =System . Convert.ToDouble(s1); double arg2 =System . Convert.ToDouble(s2); switch (operation) { case '+': d_result = arg1 + arg2; break; case '-': d_result = arg1 - arg2; break; case '*': d_result = arg1 * arg2; break; case '/': if (arg2 == 0) { throw new ApplicationException(); } else { d_result = arg1 / arg2; } break; default: throw new ApplicationException(); } txt_Result.Text = d_result.ToString(); } private void btn_Sub_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text = txt_Result.Text+ " "+ btn.Text+ " "; } private void btn_cheng_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text = txt_Result.Text + " " + btn.Text+ " "; } private void btn_chu_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text = txt_Result.Text+ " "+ btn.Text + " "; } private void button10_Click(object sender, EventArgs e) { Button btn = (Button)sender; txt_Result.Text = txt_Result.Text + " " + btn.Text + " "; } private void button10_Click_1(object sender, EventArgs e) { } } }

c#实现p2p局域网聊天小软件的源码, private void button1_Click(object sender, System.EventArgs e) { button1.Enabled = false; button2.Enabled = true; th = new Thread(new ThreadStart(Listen)); th.Start(); } private void button2_Click(object sender, System.EventArgs e) { button1.Enabled = true; button2.Enabled = false; listenerRun = false; Stop(); } private void button3_Click(object sender, System.EventArgs e) { Send(); }

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace WindowsFormsApplication2 { public partial class Form1 : Form { Form2 f2; Form3 f3; Form4 f4; public Form1() { InitializeComponent(); } private void lineShape1_Click(object sender, EventArgs e) { } private void Form1_Load(object sender, EventArgs e) { } private void label1_Click(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { f2 = new Form2(); f2.Show(); this.Hide(); } private void button2_Click(object sender, EventArgs e) { f3 = new Form3(); f3.Show(); this.Hide(); } private void button3_Click(object sender, EventArgs e) { f4 = new Form4(); f4.Show(); this.Hide(); } } }

private void Sms_Receive_Button_Click(object sender, System.EventArgs e) { String ReceiveSmsStr=""; if (Sms_Receive("4", out ReceiveSmsStr) == 1) { ReceiveSms_Text.Text = ReceiveSmsStr; } else { ReceiveSms_Text.Text = "读取短信失败"; } } private void Sms_Delete_Button_Click(object sender, System.EventArgs e) { Sms_Delete (DeleteSms_Index.Text); } private void timer1_Tick(object sender, System.EventArgs e) { if (Sms_NewFlag() == 1) { NewSms_Show.Text = "收到新短信,请查收!"; } } private void Sms_Exit_Button_Click(object sender, System.EventArgs e) { Application.Exit(); }

基本的学生信息管理系统 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace 学生管理系统 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { Form2 f = new Form2(); f.Show(); } private void btnClo_Click(object sender, EventArgs e) { this.Close(); } private void button2_Click(object sender, EventArgs e) { Form3 h = new Form3(); h.Show(); } } }

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