在不更改元素id的情况下更改input元素的值(Changing value of input element without changing element id)

在不更改元素id的情况下更改input元素的值(Changing value of input element without changing element id)

我有一个带输入元素的ASPX页面。 在页面加载时，我设置该输入元素的值。 稍后我尝试使用元素id（使用javascript）获取该字段的内容，但由于id已被更改，因此失败。 有没有办法阻止C＃更改元素ID？

输入元素：

<input id="conferenceDate" runat="server" style="width:100%;" />

在Page_Load函数中设置日期：

conferenceDate.Value = DateTime.Now.ToString();

元素值之后的id已设置：

<input name="ctl00$PlaceHolderMain$conferenceDate" type="text" id="ctl00_PlaceHolderMain_conferenceDate" style="width:100%;" value="7/21/2014 11:30:55 AM" />

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更新：我尝试了以下但是仍然没有改变id的工作：

<asp:TextBox ID="conferenceDate" runat="server" ClientIDMode="Static" />

和

当我稍后尝试使用jQuery选择它们时，我必须使用更改的id：

$("ctl00_PlaceHolderMain_conferenceDate").val()

I have an ASPX page with an input element. On page load I set the value of that input element. Later on I try to get the contents of that field using the elements id(using javascript) but it fails because the id has been changed. Is there any way to stop C# from changing the elements id?

input element:

<input id="conferenceDate" runat="server" style="width:100%;" />

Setting the date in the Page_Load function:

conferenceDate.Value = DateTime.Now.ToString();

The id after the element vale has been set:

<input name="ctl00$PlaceHolderMain$conferenceDate" type="text" id="ctl00_PlaceHolderMain_conferenceDate" style="width:100%;" value="7/21/2014 11:30:55 AM" />

---

UPDATE: I have tried the following but neither work the id is still changed:

<asp:TextBox ID="conferenceDate" runat="server" ClientIDMode="Static" />

and

When I try to select them later with jQuery I have to use the altered id:

$("ctl00_PlaceHolderMain_conferenceDate").val()

最满意答案

除了将ClientIDMode设置为static ，您还可以使用ClientID属性查找id 。

<%= conferenceDate.ClientID %>

使用您的示例信息，您可以这样找到：

单引号或双引号，不要忘记哈希标记（如果它是一个类，则为点）。

$("#<%= conferenceDate.ClientID %>").val()

In addition to setting the ClientIDMode to static, you can also find the id using the ClientID property.

<%= conferenceDate.ClientID %>

Using your sample information you can find it like this:

Single or double quotes and dont forget the hash mark (or dot if its a class).

$("#<%= conferenceDate.ClientID %>").val()