ASP.NET MVC建立XML檔案並實現元素增刪改

2022-07-31 18:00:38

如果建立如下的XML：

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<Students>
  <Student Id="1">
    <Name>darren</Name>
  </Student>
</Students>

建立XML檔案

在HomeController中，在根目錄下建立new.xml檔案：

        public ActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public ActionResult AddXml()
        {
            string path = Server.MapPath("~/new.xml");
            XDocument doc = new XDocument(
                    new XDeclaration("1.0","utf-8","yes"),
                    new XElement("Students",new XElement("Student",
                            new XAttribute("Id","1"),
                            new XElement("Name","darren")
                        ))
                );
            doc.Save(path);
            return Json(new {msg = true}, JsonRequestBehavior.AllowGet);
        }

在Index.cshtml中通過非同步請求：

@model IEnumerable<MvcApplication1.Models.Student>

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Index</h2>

<input type="button" value="建立XML" id="create"/>

@section scripts
{
    <script type="text/javascript">
        $(function() {
            $('#create').on('click', function() {
                $.ajax({
                    url: '@Url.Action("AddXml", "Home")',
                    dataType: 'json',
                    data: {},
                    type: 'POST',
                    success: function(data) {
                        if (data.msg) {
                            alert('建立成功');
                        }
                    }
                });
            });
        });
    </script>
}

顯示XML檔案元素

修改HomeController中的Index方法為：

        public ActionResult Index()
        {
            string path = Server.MapPath("~/new.xml");
            List<Student> result = new List<Student>();

            var nodes = ReadXML(path).Descendants("Student");

            foreach (var node in nodes)
            {
                Student student = new Student();
                student.Id = Convert.ToInt32(node.Attribute("Id").Value);
                foreach (var ele in node.Elements())
                {
                    student.Name = ele.Value;
                }
                result.Add(student);
            }

            return View(result);
        }

        private XDocument ReadXML(string path)
        {
            XDocument xDoc = new XDocument();
            xDoc = XDocument.Load(path);
            return xDoc;
        }

修改Home/Index.cshtml為：

@model IEnumerable<MvcApplication1.Models.Student>

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Index</h2>

<input type="button" value="建立XML" id="create"/>

<table>
    <tr>
        <th>編號</th>
        <th>姓名</th>
    </tr>
    @foreach (var item in Model)
    {
        <tr>
            <td>@item.Id</td>
            <td>@item.Name</td>
            <td>@Html.ActionLink("修改","Update","Home",new {id= item.Id},null)</td>
            <td>@Html.ActionLink("刪除","Delete","Home", new {id = item.Id},null)</td>
        </tr>
    }
</table>

<br/>
@Html.ActionLink("建立","Create","Home")

@section scripts
{
    <script type="text/javascript">
        $(function() {
            $('#create').on('click', function() {
                $.ajax({
                    url: '@Url.Action("AddXml", "Home")',
                    dataType: 'json',
                    data: {},
                    type: 'POST',
                    success: function(data) {
                        if (data.msg) {
                            alert('建立成功');
                        }
                    }
                });
            });
        });
    </script>
}

新增元素到XML檔案中

HomeController中：

        public ActionResult Create()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Create(Student student)
        {
            string path = Server.MapPath("~/new.xml");
            XDocument xd = XDocument.Load(path);

            XElement newStudent = new XElement("Student",
                new XAttribute("Id", student.Id),
                new XElement("Name",student.Name));

            xd.Root.Add(newStudent);
            xd.Save(path);
            return RedirectToAction("Index");
        }

Home/Create.csthml中：

@model MvcApplication1.Models.Student

@{
    ViewBag.Title = "Create";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Create</h2>

@using (Html.BeginForm("Create", "Home", FormMethod.Post, new {id = "addForm"}))
{
    @Html.LabelFor(m => m.Id)
    @Html.EditorFor(m => m.Id)

    <br/>
    @Html.LabelFor(m => m.Name)
    @Html.EditorFor(m => m.Name)

    <br/>
    <input type="submit" value="建立"/>
}

修改XML檔案中的元素

HomeController中：

        public ActionResult Update(string id)
        {
            string path = Server.MapPath("~/new.xml");
            XElement xe = XElement.Load(path);
            var studentXe = xe.Elements("Student").Where(e => e.Attribute("Id").Value == id).FirstOrDefault();

            Student student = new Student();
            student.Id = Convert.ToInt32(studentXe.Attribute("Id").Value);
            student.Name = studentXe.Element("Name").Value;
            return View(student);
        }

        [HttpPost]
        public ActionResult Update(Student student)
        {
            string path = Server.MapPath("~/new.xml");
            var studentId = student.Id.ToString();
            XDocument xd = XDocument.Load(path);
            XElement node =
                xd.Root.Elements("Student").Where(e => e.Attribute("Id").Value == studentId).FirstOrDefault();
            node.SetElementValue("Name", student.Name);
            xd.Save(path);
            return RedirectToAction("Index");
        }

Home/Update.csthml中：

@model MvcApplication1.Models.Student

@{
    ViewBag.Title = "Update";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Update</h2>

@using (Html.BeginForm("Update", "Home", FormMethod.Post, new {id = "editForm"}))
{
    @Html.HiddenFor(m => m.Id)
    
    @Html.LabelFor(m => m.Name)
    @Html.EditorFor(m => m.Name)

    <br/>
    <input type="submit" value="修改"/>
}

刪除XML檔案中的元素

HomeController中：

        public ActionResult Delete(string id)
        {
            string path = Server.MapPath("~/new.xml");
            XElement xe = XElement.Load(path);
            var studentXe = xe.Elements("Student").Where(e => e.Attribute("Id").Value == id).FirstOrDefault();

            Student student = new Student();
            student.Id = Convert.ToInt32(studentXe.Attribute("Id").Value);
            student.Name = studentXe.Element("Name").Value;
            return View(student);
        }

        [HttpPost]
        public ActionResult Delete(Student student)
        {
            string path = Server.MapPath("~/new.xml");
            var studentId = student.Id.ToString();
            XDocument xd = XDocument.Load(path);
            xd.Root.Elements("Student").Where(e => e.Attribute("Id").Value == studentId).Remove();
            xd.Save(path);
            return RedirectToAction("Index");
        }

Home/Delete.cshtml中：

@model MvcApplication1.Models.Student

@{
    ViewBag.Title = "Delete";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Delete</h2>

@Model.Id
<br/>
@Model.Name
<br/>

@using (Html.BeginForm("Delete", "Home", FormMethod.Post, new {id = "delForm"}))
{
    @Html.HiddenFor(m => m.Id)
    <input type="submit" value="刪除"/>
}

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ASP.NET MVC建立XML檔案並實現元素增刪改

建立XML檔案

顯示XML檔案元素

新增元素到XML檔案中

修改XML檔案中的元素

刪除XML檔案中的元素

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