Question

我目前有一个用于创建和编辑模型的视图。对于编辑操作，页面上的字段将自动填充模型中的数据，并可以进行编辑然后保存。我喜欢我的控制器中的一个类似的操作，用一些＆＃34; View＆＃34;的数据填充字段。页。我读到我可以将htmlAttribute @readonly="readonly"添加到我的文本框中，但是只有在从此操作调用视图时，我才能将此属性附加到文本框（或更简单）？我不确定这里的代码是什么，更多是一个概念性的问题，但这里有一些代码以防万一：

我想要用于所有三个功能（创建，编辑和查看）的视图称为＆＃34; Create.cshtml＆＃34;并且充满了：

@Html.LabelFor(model => model.Project.SubmissionNumber)
@Html.EditorFor(model => model.Project.SubmissionNumber)
@Html.ValidationMessageFor(model => model.Project.SubmissionNumber, "", new { @class = "text-danger" })

以及一些下拉菜单：

@Html.LabelFor(model => model.Project.Status)
@Html.DropDownListFor(model => model.Project.Status,
                      Model.Statuses,
                      "--")
@Html.ValidationMessageFor(model => model.Project.Status, "", new { @class = "text-danger" })

我不会包含整个视图，因为它非常重复。像这样想象一堆文本框和下拉菜单。

我的创建动作：

public ActionResult Create()
{
    var model = new ProjectClearanceApp.Models.ProjectViewModel();
    var statuses = GetAllStatuses();
    var divisions = GetAllDivisions();
    var branches = GetAllBranches();
    var project_types = GetAllProjectTypes();
    var states = GetAllStates();

    model.Statuses = GetSelectListItems(statuses);
    model.Divisions = GetSelectListItems(divisions);
    model.Branches = GetSelectListItems(branches);
    model.ProjectTypes = GetSelectListItems(project_types);
    model.States = GetSelectListItems(states);

    return View(model);
}

// POST: Projects/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for 
// more details see https://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "ProjectName,ProjectDescription,DateReceived,EffectiveDate,ExpirationDate,GeneralContractor,ProjectTerm,ProjectType,SubmissionNumber,PolicyNumber,Status,Underwriter,Division,BrokerCity,TAName,Branch,FirstNamedInsuredAddress,FirstNamedInsured,ProjectAddress")] Project project)
{
    if (ModelState.IsValid)
    {
        if (project.ProjectID <= 0)
        {
            db.Projects.Add(project);
        }
        else
        {
            db.Entry(project).State = EntityState.Modified;
        }
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    var model = new ProjectViewModel();
    model.Project = db.Projects.Find(project.ProjectID);

    var states = GetAllStates();
    var branches = GetAllBranches();
    var divisions = GetAllDivisions();
    var project_types = GetAllProjectTypes();
    var statuses = GetAllStatuses();

    model.States = GetSelectListItems(states);
    model.Branches = GetSelectListItems(branches);
    model.Divisions = GetSelectListItems(divisions);
    model.ProjectTypes = GetSelectListItems(project_types);
    model.Statuses = GetSelectListItems(statuses);

    return View(model);
}

所有这些GetAll_____s()和GetSelectListItems(_____)都会填充填充下拉菜单的枚举。

我的编辑动作（令人震惊的相似）：

public ActionResult Edit(int? id)
{
    if (id == null)
    {
        return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
    }

    var model = new ProjectViewModel();
    model.Project = db.Projects.Find(id);

    if (model.Project == null)
    {
        return HttpNotFound();
    }

    var states = GetAllStates();
    var branches = GetAllBranches();
    var divisions = GetAllDivisions();
    var project_types = GetAllProjectTypes();
    var statuses = GetAllStatuses();

    model.States = GetSelectListItems(states);
    model.Branches = GetSelectListItems(branches);
    model.Divisions = GetSelectListItems(divisions);
    model.ProjectTypes = GetSelectListItems(project_types);
    model.Statuses = GetSelectListItems(statuses);

    return View("Create", model);
}

// POST: Projects/Edit/5
// To protect from overposting attacks, please enable the specific properties you want to bind to, for 
// more details see https://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit([Bind(Include = "ProjectID,ProjectName,ProjectDescription,DateReceived,EffectiveDate,ExpirationDate,GeneralContractor,ProjectTerm,ProjectType,SubmissionNumber,PolicyNumber,Status,Underwriter,Division,BrokerCity,TAName,Branch,FirstNamedInsuredAddress,FirstNamedInsured,ProjectAddress")] Project project)
{
    if (ModelState.IsValid)
    {
        if (project.ProjectID <= 0)
        {
            db.Projects.Add(project);
        } else
        {
            db.Entry(project).State = EntityState.Modified;
        }
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    var model = new ProjectViewModel();
    model.Project = db.Projects.Find(project.ProjectID);

    var states = GetAllStates();
    var branches = GetAllBranches();
    var divisions = GetAllDivisions();
    var project_types = GetAllProjectTypes();
    var statuses = GetAllStatuses();

    model.States = GetSelectListItems(states);
    model.Branches = GetSelectListItems(branches);
    model.Divisions = GetSelectListItems(divisions);
    model.ProjectTypes = GetSelectListItems(project_types);
    model.Statuses = GetSelectListItems(statuses);

    return View("Create", model);
}

我假设＆＃34; View＆＃34;我想要只读的动作应该类似于＆＃34; GET＆＃34;编辑/创建操作，但我不知道需要添加什么才能使这些文本框成为只读。

Answer 1

我为实现我真正想要的而做的是我在我的ViewModel中添加了bool ReadOnly并将所有文本框和下拉列表包装在if / else语句中，如下所示：

@if (Model.ReadOnly)
{
    @Html.EditorFor(model => model.Project.SubmissionNumber, new { htmlAttributes = new { @readonly = "readonly" } })
}
else
{
    @Html.EditorFor(model => model.Project.SubmissionNumber)
}

和此：

@if (Model.ReadOnly)
{
    @Html.DropDownListFor(model => model.Project.Status,
                          Model.Statuses,
                          "--",
                          new { @disabled = "disabled" })
}
else
{
    @Html.DropDownListFor(model => model.Project.Status,
                          Model.Statuses,
                          "--")
}

现在我可以为所有三种方法重用完全相同的视图，而无需复制粘贴代码。

如何在从一个控制器调用时使文本框成为只读，而在从另一个控制器调用时不是只读的？

1 个答案: