C# asp.net mvc @Html.CheckBoxFor
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asp.net mvc @Html.CheckBoxFor
提问by Heidel
I have checkboxes in my form
我的表单中有复选框
I added at my model
我在我的模型中添加
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace CorePartners_Site2.Models
{
public class CareerForm
{
//....
public List<CheckBoxes> EmploymentType { get; set; }
}
}
public class CheckBoxes
{
public string Text { get; set; }
public bool Checked { get; set; }
}
and added at my form
并在我的表格中添加
@Html.CheckBoxFor(model => model.EmploymentType, new { id = "employmentType_1" })
@Html.CheckBoxFor(model => model.EmploymentType, new { id = "employmentType_2" })
@Html.CheckBoxFor(model => model.EmploymentType, new { id = "employmentType_3" })
but I get the mistake
但我明白了
What's wrong?
怎么了？
采纳答案by mattytommo
CheckBoxFortakes a bool, you're passing a List<CheckBoxes>to it. You'd need to do:
CheckBoxFor需要 a bool，你正在传递 aList<CheckBoxes>给它。你需要做：
@for (int i = 0; i < Model.EmploymentType.Count; i++)
{
@Html.CheckBoxFor(m => m.EmploymentType[i].Checked, new { id = "employmentType_" + i })
@Html.HiddenFor(m => m.EmploymentType[i].Text)
@Html.DisplayFor(m => m.EmploymentType[i].Text)
}
Notice I've added a HiddenForfor the Textproperty too, otherwise you'd lose that when you posted the form, so you wouldn't know which items you'd checked.
请注意，我也HiddenFor为该Text属性添加了一个，否则您在发布表单时会丢失它，因此您将不知道您检查了哪些项目。
Edit, as shown in your comments, your EmploymentTypelist is nullwhen the view is served. You'll need to populate that too, by doing this in your action method:
编辑，如您的评论所示，您的EmploymentType列表是null在提供视图时。您还需要通过在您的操作方法中执行此操作来填充它：
public ActionResult YourActionMethod()
{
CareerForm model = new CareerForm();
model.EmploymentType = new List<CheckBox>
{
new CheckBox { Text = "Fulltime" },
new CheckBox { Text = "Partly" },
new CheckBox { Text = "Contract" }
};
return View(model);
}
回答by mattytommo
Use this code:
使用此代码：
@for (int i = 0; i < Model.EmploymentType.Count; i++)
{
@Html.HiddenFor(m => m.EmploymentType[i].Text)
@Html.CheckBoxFor(m => m.EmploymentType[i].Checked, new { id = "YourId" })
}
回答by Oliver
Html.CheckBoxForexpects a Func<TModel, bool>as the first parameter. Therefore your lambda must return a bool, you are currently returning an instance of List<Checkboxes>:
Html.CheckBoxFor期望 aFunc<TModel, bool>作为第一个参数。因此，您的 lambda 必须返回 a bool，您当前正在返回 的实例List<Checkboxes>：
model => model.EmploymentType
You need to iterate over the List<Checkboxes>to output each checkbox:
您需要遍历List<Checkboxes>以输出每个复选框：
@for (int i = 0; i < Model.EmploymentType.Count; i++)
{
@Html.HiddenFor(m => m.EmploymentType[i].Text)
@Html.CheckBoxFor(m => m.EmploymentType[i].Checked,
new { id = string.Format("employmentType_{0}", i) })
}
回答by Kamil B?dkowski
If only one checkbox should be checked in the same time use RadioButtonFor instead:
如果只应同时选中一个复选框，请改用 RadioButtonFor：
@Html.RadioButtonFor(model => model.Type,1, new { @checked = "checked" }) fultime
@Html.RadioButtonFor(model => model.Type,2) party
@Html.RadioButtonFor(model => model.Type,3) next option...
If one more one could be checked in the same time use excellent extension: CheckBoxListFor:
如果可以同时检查多一个，请使用优秀的扩展：CheckBoxListFor：
Hope,it will help
希望，它会有所帮助
