ASP.NET MVC 3 HiddenFor Javascript
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ASP.NET MVC 3 HiddenFor Javascript
提问by Subby
I have two hidden input fields in my form:
我的表单中有两个隐藏的输入字段：
<input type="hidden" name="lat" id="lat" value=""/>
<input type="hidden" name="long" id="long" value="" />
I am assigning their value by doing the following:
我通过执行以下操作来分配它们的价值：
document.getElementById('lat').value = lat;
document.getElementById('long').value = lng;
Can someone please tell me how I can remove the hidden <input>fields and replace them with a @Html.HiddenFor<>and make my Javascript update the HiddenFor? I want to do this because it will obviously automatically bind the data.
有人可以告诉我如何删除隐藏<input>字段并用 a 替换它们@Html.HiddenFor<>并使我的 Javascript 更新 HiddenFor 吗？我想这样做是因为它显然会自动绑定数据。
My HiddenFor currently looks something like this:
我的 HiddenFor 目前看起来像这样：
@Html.HiddenFor(m => Model.Listing.Location.Latitude);
@Html.HiddenFor(m => Model.Listing.Location.Longitude);
I change the Javascript to do this:
我更改 Javascript 以执行此操作：
document.getElementById('Listing.Location.Latitude').value = lat;
document.getElementById('Listing.Location.Longitude').value = lng;
I get the following error in the Console:
我在控制台中收到以下错误：
Uncaught TypeError: Cannot set property 'value' of null
Can anyone see where I am going horribly wrong?
谁能看到我哪里错了？
回答by dove
The Ids of these fields will have underscores not dots, their names will have the dots. Try this:
这些字段的 ID 将带有下划线而不是点，它们的名称将带有点。试试这个：
document.getElementById('Listing_Location_Latitude').value = lat;
回答by John Hpa
Try this.
试试这个。
@Html.HiddenFor(m => m.Listing.Location.Latitude, new {id = "theIdyouWant"})
So you can get the element using Javascript:
因此，您可以使用 Javascript 获取元素：
document.getElementById("theIdyouWant")
回答by webdeveloper
Your problem is that idwill be another. Listing.Location.Latitudeis name attribute.
你的问题是那id将是另一个。Listing.Location.Latitude是名称属性。
For example:
例如：
@Html.TextBoxFor(x => x.General.Site_Name)
generated as:
生成为：
<input id="General_Site_Name" type="text" name="General.Site_Name" />
