出现异常:"Button”并不包含“CommandName”的定义,咋回事，怎么解决_ASP.NET

出现错误:"Button”并不包含“CommandName”的定义,怎么回事，如何解决
前台代码

HTML code

<asp:Button ID="Button1" CommandName="踢" CommandArgument="足球" runat="server" Text="Button" OnClick="Button_Click" />        <asp:Button id="Button2" CommandName="打" CommandArgument="篮球" Text="动作2" runat="server" OnClick="Button_Click" />

后台代码

C# code

protected void Button_Click(Object sender, EventArgs e)    {        string argName = ((Button)sender).CommandName;        string argArg = ((Button)sender).CommandArgument;        Label1.Text = "您选中的动作为:<font color=red>" + argName + "</font>,动作目标是：<font color=red>" + argArg + "</font>";    }

新手，各位帮忙解决下。

------解决方案--------------------------------------------------------
<asp:Button ID="Button1" CommandName="踢" CommandArgument="足球" runat="server" Text="Button" OnCommand="Button_Command" />
<asp:Button id="Button2" CommandName="打" CommandArgument="篮球" Text="动作2" runat="server" OnCommand="Button_Command" />

protected void Button_Command(object sender, CommandEventArgs e)
{
if(e.CommandName == "踢") //

}
------解决方案--------------------------------------------------------

探讨
<asp:Button ID="Button1" CommandName="踢" CommandArgument="足球" runat="server" Text="Button" OnCommand="Button_Command" />
<asp:Button id="Button2" CommandName="打" CommandArgument="篮球" Text="动作2" runat="server" OnCommand="Button_Command" />

protected void Button_Command(object sender, CommandEventArgs e)
{
if(e.CommandName == "踢") //

}