button 共享事件

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protected void ShowCommand(object sender, CommandEventArgs e)
    {
        switch (e.CommandName)
        {
            case "dianji1": Response.Write(e.CommandArgument.ToString()); break;
            case "dianji2": Response.Write(e.CommandArgument.ToString()); break;
        }
        if (e.CommandName == "dianji1")
        {
            Response.Write(e.CommandArgument.ToString());
        }
        if (e.CommandName == "dianji2")
        {
            Response.Write(e.CommandArgument.ToString());
        }
        if (e.CommandName == "dianji3")
        {
            Response.Write(e.CommandArgument.ToString());
        }
        if (e.CommandName == "dianji4")
        {
            Response.Write(e.CommandArgument.ToString());
        }
        }

<asp:Button ID="Button2" runat="server" Text="Button" CommandName="dianji1" CommandArgument="1" OnCommand="ShowCommand"/>
        <asp:Button ID="Button3" runat="server" Text="Button" CommandName="dianji2" CommandArgument="2" OnCommand="ShowCommand"/>
        <asp:Button ID="Button4" runat="server" Text="Button" CommandName="dianji3" CommandArgument="3" OnCommand="ShowCommand"/>
        <asp:Button ID="Button5" runat="server" Text="Button" CommandName="dianji4" CommandArgument="4" OnCommand="ShowCommand"/>
        <asp:Button ID="Button6" runat="server" Text="Button" />