C#学习教程:在控制器post方法中,MVC 4模型中的提交表单为空分享


在控制器post方法中,MVC 4模型中的提交表单为空

所以我现在的问题是,当我提交以下表格时,我无法将我的模型放入我的控制器中。 我试图让BillingCodes(这是一个BillingCodeObjects列表)中的项循环并显示。 我已经删除了一些与这种情况无关的代码,使其更简单,更容易阅读。

这是我的观点代码……

@using (Html.BeginForm("SubmitTimesheet", "Timesheet", FormMethod.Post)) { foreach (var item in Model.BillingCodes) { 
@item.Name
@item.TotalHours

Enter Time:
@Html.DropDownListFor(model => item.EnterTimeHours, new SelectList(new[] { new { Value = "0", Text = "0" }, new { Value = "1", Text = "1" }, new { Value = "2", Text = "2" }, new { Value = "3", Text = "3" }, new { Value = "4", Text = "4" }, new { Value = "5", Text = "5" }, new { Value = "6", Text = "6" }, new { Value = "7", Text = "7" }, new { Value = "8", Text = "8" }, new { Value = "9", Text = "9" }, new { Value = "10", Text = "10" }, new { Value = "11", Text = "11" }, new { Value = "12", Text = "12" }, }, "Value", "Text")) : @Html.DropDownListFor(model => item.EnterTimeMinutes, new SelectList(new[] { new { Value = "0", Text = "00" }, new { Value = "15", Text = "15" }, new { Value = "30", Text = "30" }, new { Value = "45", Text = "45" }, }, "Value", "Text"))
Enter Memo:
@Html.TextAreaFor(model => item.Comment)

这是我的控制器的一些代码:

 public class TimesheetController : Controller { // // GET: /Timesheet/ public ActionResult Index() { string getBillingCodeUrl =""; //SOME CODE REMOVED FOR LENGTH / READABILITY foreach (var entryItem in timePeriod.TimeEntries[0].EntryCollection) { foreach (var billingItem in billingCodeList.BillingCodes) { if (entryItem.BillingCode == billingItem.Name) { //update record in billingItem with data from entryItem billingItem.Comment = entryItem.Comment; billingItem.Billable = entryItem.Billable; billingItem.TotalHours = entryItem.Hours; } } } return View(billingCodeList); } [HttpPost] public void SubmitTimesheet(BillingCodeList model) { string uri = ""; foreach (var billingCode in model.BillingCodes) { //do stuff with each of these } } } } 

最后,这是模型中的信息:

  public class BillingCodeList { public List BillingCodes; } public class BillingCodeObj { public string Name { get; set; } public decimal TotalHours { get; set; } public decimal EnterTimeHours { get; set; } public decimal EnterTimeMinutes { get; set; } public bool Billable { get; set; } public string Comment { get; set; } public BillingCodeObj(string name, decimal hours) { this.Name = name; this.TotalHours = hours; } public BillingCodeObj() { } } 

这是返回表单时调试本地的图片。

当地人的形象

你正在对视图做一个foreach,所以输入元素应该在这里发布的值如下: name="BillingCodes[0].EnterTimeHours"name="BillingCodes[0].EnterTimeMinutes"你可以在网络中检查在Chrome开发者工具(CTRL + SHIFT + C)上标记请求或仅查看来源。 如果是这种情况,您将提交多个BillingCodeObj对象。 你必须有一个接收它的控制器。

看看源代码,因为这可以极大地帮助您了解幕后发生的事情。

在您的控制器上试试这个:

 [HttpPost] public void SubmitTimesheet(IEnumerable billingCodes){ } 

您也可以(出于调试目的)这样做

 public void SubmitTimesheet(FormCollection form){} 

并检查表单在调试时如何填充。

在评论和更多代码提供后,您将视图更改为:

 @using (Html.BeginForm("SubmitTimesheet", "Timesheet", FormMethod.Post)) { @Html.EditorFor(m=>m.BillingCodes) } 

在EditorTemplates / BillingCodeObj.cshtml中创建一个新的cshtml:

 @model BillingCodeObj 
@Model.Name
@Model.TotalHours

Enter Time:
@Html.DropDownListFor(model => model.EnterTimeHours, new SelectList(new[] { new { Value = "0", Text = "0" }, new { Value = "1", Text = "1" }, new { Value = "2", Text = "2" }, new { Value = "3", Text = "3" }, new { Value = "4", Text = "4" }, new { Value = "5", Text = "5" }, new { Value = "6", Text = "6" }, new { Value = "7", Text = "7" }, new { Value = "8", Text = "8" }, new { Value = "9", Text = "9" }, new { Value = "10", Text = "10" }, new { Value = "11", Text = "11" }, new { Value = "12", Text = "12" }, }, "Value", "Text")) : @Html.DropDownListFor(model => model.EnterTimeMinutes, new SelectList(new[] { new { Value = "0", Text = "00" }, new { Value = "15", Text = "15" }, new { Value = "30", Text = "30" }, new { Value = "45", Text = "45" }, }, "Value", "Text"))
Enter Memo:
@Html.TextAreaFor(model => model.Comment)

您的View是BillingCodeList类型,但您尝试将List发送到控制器中的操作。

尝试按如下方式更改操作:

 [HttpPost] public void SubmitTimesheet(BillingCodeList model) { string uri = ""; foreach (var billingCode in model.BillingCodes) { //do stuff with each of these } } 

编辑:在将模型发送到视图之前,您似乎没有将BillingCodeList的列表元素初始化为new List() 。 或者是你?

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