C# 如何将id属性传递给控制器';在ASP.NET MVC项目中的作用?
我是asp.net新手,如果有人能帮助我,我将不胜感激。。 我认为有一种形式:C# 如何将id属性传递给控制器';在ASP.NET MVC项目中的作用?,c#,asp.net,asp.net-mvc,web-applications,C#,Asp.net,Asp.net Mvc,Web Applications,我是asp.net新手,如果有人能帮助我,我将不胜感激。。 我认为有一种形式: @using (Html.BeginForm("Edit", "Projects", FormMethod.Post, new { enctype = "multipart/form-data", id = serviceId })) { @Html.ValidationSummary(true) <fieldset> <legend>Project</
@using (Html.BeginForm("Edit", "Projects", FormMethod.Post, new { enctype = "multipart/form-data", id = serviceId }))
{
@Html.ValidationSummary(true)
<fieldset>
<legend>Project</legend>
@Html.LabelFor(model => model.Title)
@Html.EditorFor(model => model.Title)
@Html.ValidationMessageFor(model => model.Title)
@Html.LabelFor(model => model.Description)
@Html.TextAreaFor(model => model.Description, new { rows = 20})
@Html.ValidationMessageFor(model => model.Description)
<input type="submit" value="Save" />
</fieldset>
}
现在提交时,我想将此serviceId
传递给我的ActionResult
,并在该视图中添加脚本:
$(function () {
$("form").submit(function () {
$.post("Projects/Edit", {Sid: $(this).attr('id'), }, function (data) {
});
});
});
在我的Projects
controller中,在Edit
ActionResult中,我得到这个id作为参数:
[HttpPost]
public ActionResult Edit(Models.Project EditedProject, int Sid)
{
Models.DBProjects dbproject = new Models.DBProjects();
PoleInvestProjectContext context = new PoleInvestProjectContext();
UserAccount curUser = context.Users.Where(u => u.UserName == User.Identity.Name).First();
EditedProject.UserId = curUser.UserId;
EditedProject.ServiceId = Sid;
dbproject.EditProject(EditedProject);
return RedirectToAction("Index", new { id = Sid });
}
这里有一个错误
:(当我尝试提交表单时:
The parameters dictionary contains a null entry for parameter 'Sid' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Edit(MyProject.Models.Project, Int32)' in 'MyProject.Controllers.ProjectsController'.
An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
如果有人能帮助我,我将非常感激!
提前感谢!使用视图模型,放弃javascript和ViewData
public class EditViewModel()
{
public string Title {get; set;}
public string Description {get; set;}
public int ServiceId {get; set;}
}
将ServiceId设置为viewModel属性,而不是ViewData
对象在控制器中
强烈地将视图键入viewModel而不是实体
反对
然后使用隐藏字段将值传递回控制器
@Html.LabelFor(model => model.Title)
@Html.EditorFor(model => model.Title)
@Html.ValidationMessageFor(model => model.Title)
@Html.LabelFor(model => model.Description)
@Html.TextAreaFor(model => model.Description, new { rows = 20})
@Html.ValidationMessageFor(model => model.Description)
@Html.HiddenFor(model => model.ServiceId)
<input type="submit" value="Save" />
你必须从JavaScript发帖吗?非常感谢!看起来很简单!所以,每次我需要传递一些Id时,我都需要使用隐藏字段?很高兴能提供帮助。还有其他方法,但这是教科书上的“mvc方式”。每当问到“如何将x从视图传递到控制器”时,答案几乎总是“使用视图模型”
@Html.LabelFor(model => model.Title)
@Html.EditorFor(model => model.Title)
@Html.ValidationMessageFor(model => model.Title)
@Html.LabelFor(model => model.Description)
@Html.TextAreaFor(model => model.Description, new { rows = 20})
@Html.ValidationMessageFor(model => model.Description)
@Html.HiddenFor(model => model.ServiceId)
<input type="submit" value="Save" />
[HttpPost]
public ActionResult Edit(EditViewModel viewModel)
{
//...