我想在asp.net core mvc中创建一个实体。该实体代表一项运动锻炼,它有一个运动集的子集合:
public class Workout
{
public DateTime Date { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public virtual ICollection<Set> Sets { get; set; }
}
public class Set
{
public int Id { get; set; }
public int ExerciseId { get; set; }
public int WorkoutId { get; set; }
public decimal Weight { get; set; }
public int Reps { get; set; }
public virtual Exercise Exercise { get; set; }
public virtual Workout Workout { get; set; }
}
表格如下所示:
“添加集”按钮使用 JavaScript 将一组“集”相关字段添加到表单中,因此可以有任意数量的“集”相关字段。
这是我包含表单的 View 的现有代码:
@model Weightlifting.Models.Workout
@{
ViewData["Title"] = "Add Workout";
}
<h2>Add Workout</h2>
<form asp-action="Create">
<div class="form-horizontal">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<label asp-for="Date" class="col-md-2 control-label"></label>
<div class="col-md-10">
<input asp-for="Date" class="form-control" />
<span asp-validation-for="Date" class="text-danger" />
</div>
</div>
<div class="form-group">
<label asp-for="Name" class="col-md-2 control-label"></label>
<div class="col-md-10">
<input asp-for="Name" class="form-control" />
<span asp-validation-for="Name" class="text-danger" />
</div>
</div>
<div class="form-group">
<label asp-for="Description" class="col-md-2 control-label"></label>
<div class="col-md-10">
<input asp-for="Description" class="form-control" />
<span asp-validation-for="Description" class="text-danger" />
</div>
</div>
<div class="form-group">
<fieldset class="form-add-set">
<label for="sets" class="col-md-2 control-label">Sets</label>
<div class="col-md-10">
<div class="add-sets">
<div class="form-inline add-set">
<div class="form-group">
<label class="control-label">Exercise</label>
<select class="form-control" asp-items="ViewBag.Exercises"></select>
</div>
<div class="form-group">
<label asp-for="Sets.First().Reps" class="control-label"></label>
<input asp-for="Sets.First().Reps" placeholder="Reps" class="form-control" />
<span asp-validation-for="Sets.First().Reps" class="text-danger" />
</div>
<div class="form-group">
<label asp-for="Sets.First().Weight" class="control-label"></label>
<input asp-for="Sets.First().Weight" class="form-control" />
<span asp-validation-for="Sets.First().Weight" class="text-danger" />
</div>
<div class="form-group">
<button class="btn btn-remove-set" data-toggle="tooltip" title="Remove Set"><span class="glyphicon glyphicon-minus"></span></button>
</div>
</div>
</div>
<button class="btn btn-add-set">Add Set</button>
</div>
</fieldset>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Save" class="btn btn-primary" />
</div>
</div>
</div>
</form>
<div>
<a asp-action="Index"><span class="glyphicon glyphicon-arrow-left"></span> Back</a>
</div>
@section Scripts {
<script type="text/javascript">
$(document).ready(function () {
var wrapper = $('.add-sets');
$(".btn-add-set").click(function(e) {
e.preventDefault();
$('.add-set:first-child').clone(true).appendTo(wrapper);
$('.add-set .btn-remove-set').show();
});
$('.btn-remove-set').click(function (e) {
e.preventDefault();
$(this).parents('.add-set').remove();
removeButton();
});
function removeButton() {
if ($('.add-set').length == 1) {
$('.add-set .btn-remove-set').hide();
}
}
});
</script>
}
这是 View 发布到的 Controller 操作:
public async Task<IActionResult> Create([Bind("Id,Date,Description,Name")] Workout workout)
{
// do stuff
}
我的问题是:如何对表单进行编码,以便将“Sets”发布到锻炼模型中的 Set 集合?
最佳答案
从操作方法中删除 [Bind("Id,Date,Description,Name")]
。
public async Task<IActionResult> Create(Workout workout)
{
// do stuff
}
然后对您的 Set
属性应用索引,如下所示。
<div class="form-inline add-set">
<div class="form-group">
<label class="control-label">Exercise</label>
<select name="Sets[0].ExerciseId" class="form-control"><option value="1">Push Up</option>
<option value="1">Set Up</option>
</select>
<div class="add-sets">
<div class="form-inline add-set">
<div class="form-group">
<label class="control-label">Exercise</label>
<select name="Sets[0].ExerciseId" class="form-control" asp-items="ViewBag.Exercises"></select>
</div>
<div class="form-group">
<label asp-for="Sets.First().Reps" class="control-label"></label>
<input asp-for="Sets.First().Reps" name="Sets[0].Reps" placeholder="Reps" class="form-control" />
<span asp-validation-for="Sets.First().Reps" class="text-danger" />
</div>
<div class="form-group">
<label asp-for="Sets.First().Weight" class="control-label"></label>
<input asp-for="Sets.First().Weight" name="Workout.Sets[0].Weight" class="form-control" />
<span asp-validation-for="Sets.First().Weight" class="text-danger" />
</div>
<div class="form-group">
<button class="btn btn-remove-set" data-toggle="tooltip" title="Remove Set"><span class="glyphicon glyphicon-minus"></span></button>
</div>
</div>
</div>
动态添加新行时,请确保索引号必须是连续的,从 0 开始并且不跳过任何迭代。
关于c# - 在 asp.net core mvc 中创建实体列表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41465103/