Adrian's questions

如果string是引用类型，比如 and class，那么为什么 ystr1和有str2不同的值呢？理论上，两个变量都应该引用堆上的同一个内存区域，country1以及country2

static void Main(string[] args)
{
    Country country1 = new Country();
    country1.x = 1;
    country1.y = 2;

    Console.WriteLine("Country1 {0}, {1}", country1.x, country1.y);

    Country country2 = new Country();
    country2 = country1;
    country1.x = 3;

    Console.WriteLine("Country1 {0}, {1}", country1.x, country1.y);
    Console.WriteLine("Country2 {0}, {1}", country2.x, country2.y);
    ///////////////////
    string str1;
    str1 = "123";

    Console.WriteLine("Str1 {0}", str1);

    string str2;
    str2 = str1;
    str1 = "1234";

    Console.WriteLine("Str1 {0}", str1);
    Console.WriteLine("Str2 {0}", str2);
}

我在 , 上有一个Visual Studio项目。默认情况下，在项目中创建了一个本地数据库。服务器资源管理器说数据源是. 仅适用于或者如果你愿意，你可以连接到另一个 subd？请解释这一切是如何运作的，它不会让我休息。c#web-приложение asp.netMicrosoft SQL ServerVisual StudioMicrosoft SQL Server

您需要将一个值传递给脚本，但它不适onload用于div.

<div onload="myfunc(this)" data-passed-perc="@passed_perc"></div>

如何使DropDownListForin 中的值显示在中SelectedStatusId？现在显示一行中的第一个，无论值如何SelectedStatusId

在控制器中

List<SelectListItem> Statuses = new List<SelectListItem>();
Statuses.Add(new SelectListItem() { Text = "Passed", Value = "PSS" });
Statuses.Add(new SelectListItem() { Text = "Failed", Value = "FL" });
Statuses.Add(new SelectListItem() { Text = "Blocked", Value = "BLCK" });
Statuses.Add(new SelectListItem() { Text = "Not run", Value = "NR" });

ViewBag.Statuses = new SelectList(Statuses, "Value", "Text");

在视野中

@Html.DropDownListFor(
x => x.SelectedStatusId,
(SelectList)ViewBag.Statuses,
new { @class = "form-control" }
)

我有两张桌子

public class TestManagementToolsContext : DbContext
{
    public DbSet<Test_Case> Test_Cases { get; set; }
    public DbSet<Test_Suite> Test_Suites { get; set; }
}

如何在模型中使用 in Test_Suite Test_Cases？

当我向 中添加一个列表List<Test_Case>时Test_Suite，当这个带有案例的列表发生变化时，案例也会发生变化Test_Cases

    public ActionResult Create()
    {

        var query = db.Test_Cases
            .Include(c => c.StepAndExpResults)
            .AsNoTracking()
            .ToList()
            .Select(c => new Test_Case
        {
            Identifier = c.Identifier,
            Title = c.Title,
            Preconditions = c.Preconditions,
            Date = c.Date,
            Comments = c.Comments,
            Summary = c.Summary,
            StepAndExpResults = c.StepAndExpResults
        }).ToList();

        Test_Suite suite = new Test_Suite();

        suite.all_test_cases = query;

        return View(suite);
    }

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "Id,Name,Description,test_cases_ch,all_test_cases,Date")] Test_Suite test_Suite)
    {
        if (ModelState.IsValid)
        {
            int count = 0;
            for (int i = 0; i < test_Suite.all_test_cases.Count; i++)
            {
                if (test_Suite.all_test_cases[i].check == true)
                {
                    //test_Suite.all_test_cases[i].check = false;

                    if (test_Suite.test_cases_ch == null)
                    {
                        test_Suite.test_cases_ch = new List<Test_Case>();
                    }
                    Test_Case test_case = new Test_Case();
                    test_Suite.test_cases_ch.Add(test_case);
                    test_Suite.test_cases_ch[count] = test_Suite.all_test_cases[i];
                    count++;
                }
            }
            test_Suite.Date = DateTime.Now;
            test_Suite.all_test_cases = null;
            db.Test_Suites.Add(test_Suite);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return View(test_Suite);
    }

我有两个模型。测试用例和一组测试用例，Test_Case并且，Test_Suite相应地，以及，Test_Suite包括一个列表Test_Case

当我得到这样的测试用例时：

Test_Suite suite = new Test_Suite();
suite.all_test_cases = db.Test_Cases.ToList();

那么所有的操作suite.all_test_cases都会影响db.Test_Cases

如何让Test_Suite所有的测试用例都进入模型，让它们不相连？我明白这是问题所在

视图中有一段代码：

<td style="word-wrap:break-word; white-space:pre-line">
    @Html.DisplayFor(model => Model.Checks[i].Value)
</td>

这个案例是这样呈现的：

问题：如何去除文本前的空行？都已经筋疲力尽了。

PS 随着white-space:pre-wrap更多的空白字符出现，它看起来像这样：

在“创建”页面上，我使用局部视图来动态添加文本框。这是实现：

创建.cshtml

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()

    <table>
        <tr>
            <th colspan="3">Checks</th>
        </tr>
        <tbody id="tableCheck">
            @Html.Partial("_checklist")
        </tbody>
    </table>

    <input type="button" value="Add check" id="addCheck" />
}

脚本

$(function () {
    $("#addCheck").click(function () {
        $.ajax({
            type: "POST",
            url: '/Checklists/GenerateChecks',
            data: $(this).closest("form").serialize(),
            success: function (html) {
                $('#tableCheck').html(html);
            },
            error: function (msg) {
                console.log(msg);
            }
        });
    });
});

好吧，部分视图本身 _checklist.cshtml，列表中的每个项目都有删除按钮。在按钮上，我试图在 DeleteCheck 方法中将事物的 ID 和模型本身传递给控制器​​。

@model TestManagementTools.Models.Checklist

@if (Model != null) {
    for (int i = 0; i < Model.Checks.Count; i++)
    {
        <tr>
            <td>
                @(i + 1)
            </td>
            <td>
                @Html.TextAreaFor(model => model.Checks[i].Value, new { @class = "form-control" })
            </td>
            <td>
                //пробуем передать
                <a href="@Url.Action("DeleteCheck", "Checklists", new { checklist = Model, id = Model.Checks[i].Id })" role="button">Delete</a>
            </td>
        </tr>
    }   
}

实际上，这里是ChecklistsController.cshtml控制器中的方法。

//добавление проверки по кнопке
[HttpPost]
public ActionResult GenerateChecks(Checklist checklist)
{
    if (Request.IsAjaxRequest())
    {
        Check check = new Check();

        if (checklist.Checks == null)
        {
            checklist.Checks = new List<Check>();
        }

        checklist.Checks.Add(check);

        return PartialView("_checklist", checklist);
    }
    return PartialView("_checklist", checklist);
}

//удаление проверки, но сюда приходит модель равная null
public ActionResult DeleteCheck(int id, Checklist checklist)
{
    checklist.Checks.RemoveAt(id);
    return PartialView("_checklist", checklist);
}

所以问题是如何将事物和模型 ID 从我的局部视图传递到控制器？现在，如上所述，变为空

我创建了一个清单，添加到数据库中：

我从数据库中读取 - 列表是空的，其他一切都已到位：

模型

public class Checklist
{
    public int Id { get; set; }

    public List<Check> Checks { get; set; }
}

public class Check
{
    public int Id { get; set; }

    public string Value { get; set; }
} 

控制器

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "Id,Checks")] Checklist checklist)
{
    if (ModelState.IsValid)
    {
        db.Checklists.Add(checklist);
        db.SaveChanges();
        return RedirectToAction("Index");
    }
    return View(checklist);
}


public ActionResult Details(int? id)
{
    if (id == null)
    {
        return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
    }
    Checklist checklist = db.Checklists.Find(id);
    if (checklist == null)
    {
        return HttpNotFound();
    }
    return View(checklist);
}

模型

public class Checklist
{
    public int Id { get; set; }

    public Check Check { get; set; }

    public List<Check> Checks { get; set; }
}

public class Check
{
    public int Id { get; set; }

    public string Value { get; set; }
} 

ChecklistsController.cs控制器方法

[HttpPost]
public ActionResult GenerateChecks(Checklist checklist)
{
    if (Request.IsAjaxRequest())
    {
        Check check = new Check();
        check.Value = checklist.Check.Value;

        if (checklist.Checks == null)
        {
            checklist.Checks = new List<Check>();
        }

        checklist.Checks.Add(check);

        return PartialView("_checklist", checklist);
    }
    return PartialView("_checklist", checklist);
}

创建.cshtml 视图

<script src="@Url.Content("~/Scripts/add_check.js")" type="text/javascript"></script>

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()

    <h4>New Checklist</h4>

    <table class="table table-bordered" id="tableCheck">
        <tr><th>Checks</th></tr>
        <tbody></tbody>
    </table>

    <input type="button" value="Add" class="btn btn-default" id="addCheck" />

    <input type="submit" value="Create" class="btn btn-primary" />
}

添加检查.js

$(function () {
    $("#addCheck").click(function () {
        $.ajax({
            type: "POST",
            url: 'Checklists/GenerateChecks',
            data: form.serialize()
        })
        .success(function (html) {
            var tableBody = document.getElementById('tableCheck').getElementsByTagName('tbody')[0];
            tableBody.text(html);
        })
        .error(function (msg) {
            console.log(msg);
        });
    });
});

_checklist.cshtml的部分视图

@model TestManagementTools.Models.Checklist

@for (int i = 0; i < Model.Checks.Count; i++)
{
    <tr>
        <td>
            @Html.TextBoxFor(model => model.Checks[i].Value, new { @class = "form-control" })
        </td>
    </tr>
}