MVC 3 基本操作增加修改
在MVC中实现基本的增删改和传统的asp .net 程序有很大的不同，刚开始使用MVC还是有些不太适应，但是它的页面简洁也相当的不同，同时对服务器的访问性能上也有很大的提高。基于此，下面对我学习过程记录如下：
首先，使用VS创建一个以Internet为模板的项目,如下所示：
在“_Layout.cshtml”文件中引入相关脚本文件，此文件的路径如下：
修改成如下内容：
1: <head>
2: <title>@ViewBag.Title</title>
3: <link href="@Url.Content("~/Content/themes/base/jquery.ui.all.css")" rel="Stylesheet" type="text/css" />
4: <link href="@Url.Content("~/Content/Site.css")" rel="stylesheet" type="text/css" />
5: <script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")" type="text/javascript"></script>
1:
2: <script src="@Url.Content("~/Scripts/jquery-ui-1.8.11.min.js")" type="text/javascript">
1: </script>
1: </script>
2: <script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript">
1: </script>
</script>
6: </head>
在Models文件夹下，新建类文件“Note.cs”，内容如下：
1: public class Note
2: {
3: public int Id { get; set; }
4: public string Title { get; set; }
5: public string Body { get; set; }
6: }
再创建类文件“NoteManager.cs”,内容如下：
1: public class NoteManager
2: {
3: public Collection<Note> Notes
4: {
5: get
6: {
7: if (HttpRuntime.Cache["Notes"] == null)
8: loadInitialData(); return (Collection<Note>)HttpRuntime.Cache["Notes"];
9: }
10: }
11: private void loadInitialData()
12: {
13: var notes = new Collection<Note>
14: {
15: new Note
16: {
17: Id = 1,
18: Title = "Set DVR for Sunday",
19: Body = "Don't forget to record Game of Thrones!"
20: },
21: new Note
22: {Id = 2, Title = "Read MVC article", Body = "Check out the new iwantmymvc.com post"},
23: new Note
24: {
25: Id = 3,
26: Title = "Pick up kid",
27: Body = "Daughter out of school at 1:30pm on Thursday. Don't forget!"
28: },
29: new Note {Id = 4, Title = "Paint", Body = "Finish the 2nd coat in the bathroom"}
30: };
31: HttpRuntime.Cache["Notes"] = notes;
32: } public Collection<Note> GetAll() { return Notes; }
33: public Note GetById(int id)
34: {
35: return Notes.Where(i => i.Id == id).FirstOrDefault();
36: }
37: public int Save(Note item)
38: {
39: if (item.Id <= 0)
40: return SaveAsNew(item);
41: var existingNote = Notes.Where(i => i.Id == item.Id).FirstOrDefault();
42: if(existingNote == null)
43: {
44: return -1;
45: }
46:
47: existingNote.Title = item.Title;
48: existingNote.Body = item.Body;
49: return existingNote.Id;
50: }
51: private int SaveAsNew(Note item)
52: {
53: item.Id = Notes.Count + 1; Notes.Add(item); return item.Id;
54: }
55: }
修改“HomeController”为如下内容：
1: public class HomeController : Controller
2: {
3: public ActionResult Index()
4: {
5: return View();
6: }
7: [OutputCache(Duration = 0)]
8: public ActionResult List()
9: {
10: var manager = new NoteManager();
11: var model = manager.GetAll();
12: return PartialView(model);
13: }
14: [OutputCache(Duration = 0)]
15: public ActionResult Create()
16: {
17: var model = new Note();
18: return PartialView("NoteForm", model);
19: }
20:
21: [OutputCache(Duration = 0)]
22: public ActionResult Edit(int id)
23: {
24: var manager = new NoteManager();
25: var model = manager.GetById(id);
26: return PartialView("NoteForm", model);
27: }
28: [HttpPost]
29: public JsonResult Save(Note note)
30: {
31: var manager = new NoteManager();
32: var noteId = manager.Save(note);
33: return Json(new { Success = noteId > 0 });
34: }
35: }
对项目编译一下，再新建一个“NoteForm”View，如下图所示：
注意：上图中选择部分视图和使用强类型的View
修改后的内容如下所示：
1: @model MvcSample.Models.Note
2: <script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
1:
2: <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript">
1: </script>
2:
3: @using (Html.BeginForm("Save", "Home", FormMethod.Post, new { id = "NoteForm" }))
4: {
5:
6:
7: <div>
8: @Html.ValidationSummary(true, "输入的内容有错，请纠正所有错误，再提交.")
9: @Html.HiddenFor(m => m.Id)
10: <div class="editor-label">
11: @Html.LabelFor(m => m.Title, "标题")
12: </div>
13: <div class="editor-field">
14: @Html.TextBoxFor(m => m.Title, new { data_val = "true", data_val_required = "标题不能为空。" })
15: @Html.ValidationMessageFor(m => m.Title)
16: </div>
17:
18: <div class="editor-label">
19: @Html.LabelFor(m => m.Body, "内容")
20: </div>
21: <div class="editor-field">
22: @Html.TextBoxFor(m => m.Body, new { data_val = "true", data_val_required = "内容不能为空。" })
23: @Html.ValidationMessageFor(m => m.Body)
24: </div>
25:
26: </div>
27: }
28:
29: <script type="text/javascript" language="javascript">
30: $("#NoteForm").submit(function () {
31: $("#NoteForm").validate();
32: return false;
33: });
</script>
再新建“List.cshtml”视图，也是部分视图，如下图所示： 
修改后的内容如下：
1: @model IEnumerable<MvcSample.Models.Note>
2: <ul class="NotesList">
3: @foreach (var note in Model)
4: {
5: <li> @note.Title <br /> @note.Body <br />
6: <span class="EditLink" noteid="@note.Id">Edit</span>
7: </li>
8: }
9: </ul>
在“Scripts”目录下新建脚本文件“Common.js”，并加入如下内容：
1: function DialogObject(dialogId, formId, addUrl, editUrl, saveUrl, ajaxPostFunction, loadSuccessCallBack) {
2: dialogId = "#" + dialogId;
3: formId = "#" + formId;
4: Success = 0;
5: AlertError = 2;
6: this.saveUrl = saveUrl;
7: this.addUrl = addUrl;
8: this.editUrl = editUrl;
9: this.ajaxPostFunction = ajaxPostFunction;
10: this.width = 440;
11: this.height = 330;
12:
13:
14: this.dialogLoad = function () {
15: $(dialogId).dialog({
16: autoOpen: false, //对话框的是否自动打开
17: width: this.width, //宽高
18: height: this.height,
19: modal: true, //模态对话框
20: buttons: {//自定义对话框的按钮信息
21: "保存": this._saveFunction,
22: "返回": this._closedialog()
23: }
24: });
25: };
26:
27: this.loadEdit = function (id) {
28:
29: $(dialogId).html("")
30: .dialog("option", "title", "编辑")
31: .load(editUrl + "/" + id, this._openDialog());
32:
33: };
34: this.loadAdd = function () {
35: $(dialogId).html("")
36: .dialog("option", "title", "新增")
37: .load(addUrl, this._openDialog());
38: };
39: this._openDialog = function () {
40: return new Function("$('" + dialogId + "').dialog('open');");
41: };
42:
43: this._closedialog = function () {
44: return new Function("$('" + dialogId + "').dialog('close');");
45: };
46:
47: this.postFunction = function (formData, successCallback) {
48: $.post(saveUrl,
49: formData,
50: function (data, textStatus) {
51: switch (textStatus) {
52: case
53: "timeout":
54: break;
55: case "error":
56: break;
57: case "notmodified":
58: break;
59: case "success":
60: successCallback($(dialogId), $(formId), data);
61: break;
62: case "parsererror":
63: break;
64: default:
65: break;
66: }
67:
68: });
69:
70: };
71: defaultAjaxPostFunction = this.postFunction;
72:
73: this._saveFunction = function () {
74: var b = $(formId);
75: b.submit();
76: if (b.validate().numberOfInvalids() > 0) {
77: return;
78: }
79: if (ajaxPostFunction != null)
80: ajaxPostFunction();
81: else
82: defaultAjaxPostFunction($(formId).serialize(), function (dlgObject, formObject, data) {
83: if (data.Success == true) {
84: dlgObject.dialog("close");
85: if (loadSuccessCallBack != null) {
86: loadSuccessCallBack();
87: }
88: }
89: // else if (data.Success == AlertError) {
90: // alert(data.data);
91: // }
92: // else {
93: // formObject.html(data.data);
94: // }
95: });
96: };
97:
98:
99: }
修改默认的Index.cshtml文件内容如下所示：
1: @{
2: ViewBag.Title = "Home Page";
3: }
4: <h2>
5: Notes</h2>
6: <div id="NoteListBlock">
7: </div>
8: <span class="AddLink">Add New Note</span>
9: <div id="NoteDialog" title="" class="Hidden">
10: </div>
11: <script src="@Url.Content("~/Scripts/Common.js?verion=1")" type="text/javascript"></script>
1:
2: <script type="text/javascript">
3: var noteDialog = new DialogObject("NoteDialog", "NoteForm", "/Home/Create", "/Home/Edit", "/Home/Save", null, LoadList);
4: $(function() {
5: noteDialog.dialogLoad();
6: $(".EditLink").live("click", function () {
7: var id = $(this).attr("noteid");
8: noteDialog.loadEdit(id);
9: });
10: $(".AddLink").click(function () {
11: noteDialog.loadAdd();
12: });
13:
14: LoadList();
15: });
16:
17: function LoadList() {
18: LoadMvcPage("/Home/List");
19: }
20:
21: function AddRecord() {
22: noteDialog.loadAdd();
23: return false;
24: }
25:
26: function LoadMvcPage(url) {
27: $("#NoteListBlock").load(url);
28: }
</script>
在Contents/site.css下加入如下内容：
1: .EditLink
2: {
3: color: Blue;
4: cursor: pointer;
5: }
6: .EditLink:hover
7: {
8: text-decoration: underline;
9: }
10: .AddLink
11: {
12: color: Blue;
13: cursor: pointer;
14: }
15: .AddLink:hover
16: {
17: text-decoration: underline;
18: }
19: #NoteForm label
20: {
21: display: block;
22: margin-bottom: 6px;
23: }
24: #NoteForm label > span
25: {
26: font-weight: bold;
27: }
28: #NoteForm input[type=text]
29: {
30: width: 350px;
31: }
32: #NoteForm textarea
33: {
34: width: 350px;
35: height: 80px;
36: }
37:
38: .Hidden
39: {
40: display: none;
41: }
现在来运行程序，效果如下：
新增：
编辑：
下一篇，将进行分页查询的实现
备注：如果弹出对话框显示不正常，请检查Content下的样式文件是否存在。
