Question

我有一个Model属性，控制器设置为1，但在我看来，我将其视为0和1，具体取决于我如何访问它。

查看片段（这些行也是绝对连续的！）

@Html.DisplayFor(model => model.resumeStage)    
@Html.HiddenFor(model => model.resumeStage)
@Html.EditorFor(model => model.resumeStage)

呈现HTML（为了便于阅读，我移动了标记前面的value=）

1
<input value="0" data-val="true" data-val-number="The field resumeStage must be a number." data-val-required="The resumeStage field is required." id="resumeStage" name="resumeStage" type="hidden" />
<input value="0" class="text-box single-line" id="resumeStage" name="resumeStage" type="number" />

值不应该始终为1吗？当我在文本框中显示它时，我似乎失去了该属性的状态！视图控制器受模型类的强约束，模型类定义为

public class CreateUserModel
{
    [Required]
    public int resumeStage { get; set; } // <== problem

    public LocalProfile newLocalUser { get; set; }
    public ExtProfile newExtUser { get; set; }

    public CreateUserModel()
    {
        resumeStage = 0;
        newLocalUser = new LocalProfile();
        newExtUser = new ExtProfile();
        preFillWithTestData();
    }

    private void preFillWithTestData()
    {
        // prefill the newLocalUser
        // and newExtUser classes with dummy data
    }
}

接收表格POST的控制器方法（我从0 =＆gt; 1翻转int）是：

[HttpPost]
public ActionResult UserRegistration(CreateUserModel newUser)
{
    try
    {
        //stage 0, setup local account
        if (newUser.resumeStage <= 0)
        {
            // do stuff
            newUser.resumeStage = 1;
        }

        // stage 1, setup external account
        if (newUser.resumeStage <= 1)
        {
            // test an exception
            Exception ex = new Exception("TEST: External service provider offline");
            throw ex;
            newUser.resumeStage = 2;
        }

        return RedirectToAction("Index");
    }
    catch (Exception ex)
    {
        return View(newUser); // newUser.resumeStage is 1 here but 
                              // view will disagree
    }
}

创建和呈现表单的控制器方法是：

public ActionResult UserRegistration()
{
    // Constructor prefills with test data, nothing more to do
    CreateUserModel newUser = new CreateUserModel();

    return View(newUser);
}

问题：有谁知道为什么我似乎无法在HTML呈现的文本框中将resumeStage显示为1？

Answer 1

您应该添加ModelState.Remove("resumeStage");或添加对ModelState.Clear();

的来电

catch (Exception ex)
{
    ModelState.Remove("resumeStage");
    return View(newUser); // newUser.resumeStage is 1 here but 
                          // view will disagree
}

MVC4 View model int属性是1，但HTML呈现为0？

1 个答案: