动态填充ASP.NET中的时间下降

Question

我需要用小时和分钟填充2下拉列表.我当前填充下拉列表的方法并没有正确格式化数字,因为我需要前9个数字的前导0,即01,02,03,而不是当前正在发生的1,2,3.

C#

protected override void OnInit(EventArgs e)
{
  base.OnInit(e);
  if (!IsPostBack)
     {
        // Populate and Bind Time drop downs
        ddlOh1OpenHours.DataSource = Enumerable.Range(00, 24);
        ddlOh1OpenHours.DataBind();
        ddlOh1OpenMinutes.DataSource = Enumerable.Range(00, 60);
        ddlOh1OpenMinutes.DataBind();
      }
}

ASPX

<asp:DropDownList ID="ddlOh1OpenHours" runat="server" />
<span>:</span>
<asp:DropDownList ID="ddlOh1OpenMinutes" runat="server" />

结果:

<select name="ctl00$MainContent$ddlOh1OpenHours" id="ctl00_MainContent_ddlOh1OpenHours">
    <option selected="selected" value="0">0</option>
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    <option value="5">5</option>
    <option value="6">6</option>
    <option value="7">7</option>
    <option value="8">8</option>
    <option value="9">9</option>
    <option value="10">10</option>
    <option value="11">11</option>
    <option value="12">12</option>
    <option value="13">13</option>
    <option value="14">14</option>
    <option value="15">15</option>
    <option value="16">16</option>
    <option value="17">17</option>
    <option value="18">18</option>
    <option value="19">19</option>
    <option value="20">20</option>
    <option value="21">21</option>
    <option value="22">22</option>
    <option value="23">23</option>
</select>

Answer 1

只需使用ToString正确的格式:

var hours = Enumerable.Range(00, 24).Select(i => i.ToString("D2"));
var minutes  = Enumerable.Range(00, 60).Select(i => i.ToString("D2"));

dlOh1OpenHours.DataSource = hours;
ddlOh1OpenHours.DataBind();
ddlOh1OpenMinutes.DataSource = minutes;
ddlOh1OpenMinutes.DataBind();

>演示<

标准数字格式字符串