Question

以下代码可以正常运行：

 @using (Html.BeginForm("LOLOL", "PATIENT", null))
    {
        @Html.ValidationSummary(true)
        <fieldset>
            <legend>PATIENT</legend>
            <div class="editor-label">
                @Html.LabelFor(model => model.Name)
            </div>
            <div class="editor-field">
                @Html.EditorFor(model => model.Name)
                @Html.ValidationMessageFor(model => model.Name)
            </div>

        </fieldset>
        <p>
            <input type="submit" value="SUBMIT" />
        </p>
    }

在LOLOLController中：

[HttpPost]
    public IActionResult LOLOL(Patient p) {
        var client = new MongoClient("mongodb://localhost:27017");
        var userId = _userManager.GetUserId(HttpContext.User);
        string db_name = "test" + userId;
        var database = client.GetDatabase(db_name);
        var collection = database.GetCollection<BsonDocument>("patients");
        var filter = Builders<BsonDocument>.Filter.Eq("Name", p.Name.ToString());
        var document = collection.Find(filter).First();
        // I'm cutting short the rest of the code, because when I do something 
 // similar later, "collection.Find(filter).First()" fires an exception, I'll     
// explain..


        return View(p);
    }

我有相当于取消HTML中的fieldset元素的东西，基本上只是在＆＃34; Html.BeginForm＆＃34;中的一个按钮，但是数据显然没有正确绑定，我知道，因为如果我只有一个按钮，没有数据输入，我点击按钮，然后我收到一个错误，说无法从数据库中找到数据。（编辑：我现在已经确认这确实是因为Patient对象没有像我预期的那样传递给控制器，看起来像是在调用html.beginform时创建了一个全新的Patient对象...我想也许旧的Patient对象正在传递，因此每次使用Html.BeginForm时都不必输入所有数据成员。

总而言之，我想填写一个文本框，单击一个按钮来加载一个新页面并显示该文本框的值，但是该值仍然基本上保持在会话状态，所以如果我调用另一个Html.BeginForm函数并进入第三个视图，第一个视图中的文本将显示在第三个视图中，即使我没有在第二个视图中键入其值。希望我能重复这个过程，基本上加载一个类的数据成员，每个数据成员有一个视图。

Answer 1

确保将上一个视图中的数据从Controller传递到新视图。传递它时，请在新视图的上一个视图中为这些属性添加@HiddenFor。这样，新视图将保留，然后将值传递给下一个POST。

@Html.HiddenFor(model => model.PropertyYouPassedAndWantToKeepAndPassAgain

编辑：这是根据要求为一个对象使用多个视图的逻辑。

型号：

public class Patient
{
    string Name { get; set; }
    string Address { get; set; }
    string City { get; set; }
}

Page1 GET：

[HttpGet]
public ActionResult Page1()
{
    Patient patient = new Patient();
    return View("~/Views/Page1.cshtml", patient);
}

Page 1查看...仅询问姓名。

@model mysite.Models.Patient

@using (Html.BeginForm("LOLOL", "PATIENT", null))
    {
        @Html.ValidationSummary(true)
        <fieldset>
            <legend>PATIENT</legend>
            <div class="editor-label">
                @Html.LabelFor(model => model.Name)
            </div>
            <div class="editor-field">
                @Html.EditorFor(model => model.Name)
                @Html.ValidationMessageFor(model => model.Name)
            </div>

        </fieldset>
        <p>
            <input type="submit" value="SUBMIT" />
        </p>
    }

Page1 POST ...找到病人并将其传递给下一个视图...

[HttpPost]
public ActionResult Page1(Patient patient)
{
    if (ModelState.IsValid)
    {
        return View("~/Views/Page2.cshtml", patient); // pass your patient to the second page view with the name
    }
    else
    {
        return View("~/Views/Page1.cshtml", patient);
    }
}

Page2 GET ...从之前的Page1 POST中获取患者并将其发送到Page2 View。

[HttpGet]
public ActionResult Page2(Patient patient)
    {
        // Receive patient from Page1 post and pass it to new view... includes the name
        return View("~/Views/Page2.cshtml", patient);
    }

Page2 View获取对象...使用HiddenFor保留您刚刚从GET发送的名称。

@model mysite.Models.Patient

@using (Html.BeginForm("LOLOL", "PATIENT", null))
{
    @Html.HiddenFor(model => model.Name) @* This will keep the name on your next post *@
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>PATIENT</legend>
        <div class="editor-label">
            @Html.LabelFor(model => model.Address)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Address)
            @Html.ValidationMessageFor(model => model.Address)
        </div>

    </fieldset>
    <p>
        <input type="submit" value="SUBMIT" />
    </p>
}

由于HiddenFor持有姓名，因此会在您的下一篇文章中传递。它存在，但隐藏在表单本身之外。

[HttpPost]
public ActionResult Page2(Patient patient)
{
    // Because of the HiddenFor, the Name will be passed because it was kept in the view... but hidden from the form itself.
    // It's basically storing it for you to pass again
    if (ModelState.IsValid)
    {
        // Pass object with Name and Address to next controller
        return View("~/Views/Page3.cshtml", patient);
    }
    else
    {
        return View("~/Views/Page2.cshtml", patient);
    }
}

Page2 POST

[HttpPost]
public ActionResult Page2(Patient patient)
{
    // Because of the HiddenFor, the Name will be passed because it was kept in the view... but hidden from the form itself.
    // It's basically storing it for you to pass again
    if (ModelState.IsValid)
    {
        // Pass object with Name and Address to next controller
        return View("~/Views/Page3.cshtml", patient);
    }
    else
    {
        return View("~/Views/Page2.cshtml", patient);
    }
}

Page3 GET

[HttpGet]
public ActionResult Page3(Patient patient)
{
    // Pass patient again... to your next view
    return View("~/Views/Page3.cshtml", patient);
}

Page3查看...

@using (Html.BeginForm("LOLOL", "PATIENT", null))
{
    @Html.HiddenFor(model => model.Name) @* Keep name again for your next post *@
    @Html.HiddenFor(model => model.Address) @* Now we are keeping the address as well *@
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>PATIENT</legend>
        <div class="editor-label">
            @Html.LabelFor(model => model.City)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.City)
            @Html.ValidationMessageFor(model => model.City)
        </div>

    </fieldset>
    <p>
        <input type="submit" value="SUBMIT" />
    </p>
}

依此类推......直到你的模型完成并希望用它做一些事情。

在.NET MVC中将数据从视图传递到控制器 - ＆＃34; @ model＆＃34;没有突出显示

1 个答案: