多個按鈕使用一個事件

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace ZeroWire.Web.SFA
{
	/// <summary>
	/// Top2 的摘要說明。
	/// </summary>
	public class Top2 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button BtnIndex;
		protected System.Web.UI.WebControls.Button BtnCale;
		protected System.Web.UI.WebControls.Button BtnAcco;
		protected System.Web.UI.WebControls.Button BtnCont;
		protected System.Web.UI.WebControls.Button BtnProd;
		protected System.Web.UI.WebControls.Button BtnDocu;
		protected System.Web.UI.WebControls.Button BtnFore;
		protected System.Web.UI.WebControls.Button BtnDash;
		protected System.Web.UI.WebControls.Button BtnOpp;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此處放置用戶代碼以初始化頁面
			if(!Page.IsPostBack)
			{
				RestoreBackColor();

			}
		}

		#region Web 窗體設計器生成的代碼
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 該調用是 ASP.NET Web 窗體設計器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
		/// 此方法的內容。
		/// </summary>
		private void InitializeComponent()
		{    
			Add_Event();
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion		

		private void Add_Event()
		{
			this.BtnOpp.Click += new System.EventHandler(this.HeadBtn_Click);
			this.BtnCale.Click += new System.EventHandler(this.HeadBtn_Click);
			this.BtnAcco.Click += new System.EventHandler(this.HeadBtn_Click);
			this.BtnCont.Click += new System.EventHandler(this.HeadBtn_Click);
			this.BtnProd.Click += new System.EventHandler(this.HeadBtn_Click);
			this.BtnDocu.Click += new System.EventHandler(this.HeadBtn_Click);
			this.BtnFore.Click += new System.EventHandler(this.HeadBtn_Click);
			this.BtnDash.Click += new System.EventHandler(this.HeadBtn_Click);
			this.BtnIndex.Click += new System.EventHandler(this.HeadBtn_Click);

		}
		/// <summary>
		/// 恢復所有按鈕背景顏色
		/// </summary>
		private void RestoreBackColor()
		{
			BtnIndex.BackColor=Color.FromArgb(205,205,205);
			BtnOpp.BackColor=Color.FromArgb(205,205,205);
			BtnCale.BackColor=Color.FromArgb(205,205,205);
			BtnAcco.BackColor=Color.FromArgb(205,205,205);
			BtnCont.BackColor=Color.FromArgb(205,205,205);
			BtnProd.BackColor=Color.FromArgb(205,205,205);
			BtnDocu.BackColor=Color.FromArgb(205,205,205);
			BtnFore.BackColor=Color.FromArgb(205,205,205);
			BtnDash.BackColor=Color.FromArgb(205,205,205);

		}

		private void HeadBtn_Click(object sender, System.EventArgs e)
		{
			RestoreBackColor();
			((Button)sender).BackColor=Color.Gray;//設置當前按鈕的顏色
		}

	}
}