WebForm DropDownList bind year and month respectively

The graph is made of demanders,Requirements are from last year,So the small year is2021,followed by a month drop-down box,Both the default selected this year this month,Does such demand make you want to try it?？来吧,展示

<form runat="server">
	<div class="clearfix mt15">
	    <div class="fl sx-bt">时间：</div>
	    <div class="fl fw-ed">
	        <div class="fl">
	            <asp:DropDownList ID="ddlYear" runat="server" CssClass="textbox-3"></asp:DropDownList>
	        </div>
	            <asp:DropDownList ID="ddlMonth" runat="server" CssClass="textbox-3"></asp:DropDownList>
	        </div>
	    </div>
	</div>
</form>

protected void Page_Load(object sender, EventArgs e)
{
    
    if (!IsPostBack)
    {
    
        BandTime();
    }
}
private void Bind()
{
    
    BandTime();
}
private void BandTime() {
    
    ddlYear.Items.Clear();
    for (int i= System.DateTime.Now.Year; i>=2021;i--) {
    
        ListItem li = new ListItem(i.ToString()+"年", i.ToString());
        ddlYear.Items.Add(li);
    }
    ddlMonth.Items.Clear();
    for (int i = 12; i >= 1; i--)
    {
    
        ListItem li = new ListItem(i.ToString() + "月", i.ToString());
        ddlMonth.Items.Add(li);
    }
    ddlMonth.SelectedValue = System.DateTime.Now.Month.ToString();
}

got gastroenteritis,Had a two weeks and then I eat vegetarian food,Finally got better this week,Then start eating meat,The spirit is not good
结论：Eating meat really increases the burden on the stomach.Want to work more,Better to be vegetarian.