CMS:文章管理之视图(4)

现在来完成分类的编辑操作。原来是想用模型加载数据的,但现在想想,用表单加载会方便些。

切换到文章管理的控制器,添加onCategoryEdit方法,利用表单来加载数据,代码如下:

onCategoryEdit:function () {

    var me = this,

        tree =me.view.down("treepanel"),

        rs =tree.getSelectionModel().getSelection();

    if (rs.length > 0) {

        rs = rs[0];

        if (rs.data.id > 10000) {

            var win =SimpleCMS.view.Content.CategoryEdit;

            win.form.getForm().url ="/Category/Edit";

            win.setTitle("编辑文章类别");

            win.form.load({

                url:"Category/Details",

                params: { id: rs.data.id },

                success: function (form,action) {

                    this.show();

                },

                failure:SimpleCMS.FormSubmitFailure,

                scope: win

            });           

        } else {

            Ext.Msg.alert("信息", "类别“" + rs.data.text + "”不允许编辑。");

        }

    }

},

 

分类id大于10000的才是可以编辑的分类,因而这里要加个判断。设置好分类编辑窗口的的提交地址和标题后,就调用load方法为表单加载数据了。如果成功,就显示窗口。这里要注意作用域的设置,在这里把作用域设置为win了,这样,在success方法内,this指针就指向窗口了。

 

现在切换到Category控制器,完成Details方法。根据书12.5.2节的示例可以知道,在data内返回一个JSON对象就可以了,对象中的关键字就是表单中字段的名字,这相当简单,代码如下:

[AjaxAuthorize(Roles= "普通用户,系统管理员")]

publicJObject Details()

{

    int id=0;

    int.TryParse(Request["id"],outid);

    try

    {

        var q = dc.T_Category.SingleOrDefault(m=> m.CategoryId == id);

        if (q == null)

        {

            returnMyFunction.WriteJObjectResult(false, 0, "分类已被删除或不存在。", null);

        }

        else

        {

 

            return new JObject(

                newJProperty("success",true),

                new JProperty("data",

                    new JObject(

                        newJProperty("CategoryId",q.CategoryId),

                        newJProperty("Content",q.Content),

                        newJProperty("Image",q.Image),

                        newJProperty("Title",q.Title),

                        newJProperty("SortOrder",q.SortOrder),

                        newJProperty("ParentId",q.ParentId==null ? -1 : q.ParentId)

                    )

                )

            );

        }

    }

    catch (Exception e)

    {

        returnMyFunction.WriteJObjectResult(false, 0, e.Message, null);

    }

}

 

这里要注意的是ParentId,为null时,要设置为-1,这样才能对应上是根节点。

现在还不能测试,因为编辑按钮现在还是禁用状态,因而,要监听分类树的selectionchange事件,当有选择了节点且节点id大于10000时启用编辑和删除按钮。切换到文章管理的控制器,先在me.control语句上添加绑定selectionchange的语句,代码如下:

me.view.down("treepanel").on("selectionchange",me.onTreeSelect, me);

 

然后编写onTreeSelect方法,这里要注意setDisabled的赋值,要把id的值考虑进去,代码如下:

onTreeSelect:function (model, sels) {

    var me = this,

        id = 0;

    if (sels.length > 0) {

        id = sels[0].data.id;

    }

   me.getCategoryEdit().setDisabled(sels.length == 0 || id <= 10000);

    me.getCategoryDelete().setDisabled(sels.length== 0 || id <= 10000);

}

 

这里,如果存在选择,则把id值取出来,然后在setDisabled方法内,如果选择记录的长度等于0,说明要禁用按钮,又或者id值小于10000,也要禁用按钮。

 

好了,现在可以单击编辑按钮对分类进行编辑了。

余下的就是完成编辑操作的后台代码了,这个与Add方法区别不大,具体代码如下:

[HttpPost]

[AjaxAuthorize(Roles= "普通用户,系统管理员")]

publicJObject Edit(CategoryModel model)

{

    bool success = false;

    JObject errors = new JObject();

    if (ModelState.IsValid)

    {

        try

        {

            var q =dc.T_Category.SingleOrDefault(m => m.CategoryId == model.CategoryId);

            if (q == null)

            {

                returnMyFunction.WriteJObjectResult(false, 0, "要修改的记录已被删除或不存在。", null);

            }

            else

            {

                string old_fullpath =q.FullPath;

                q.Content = model.Content;

                q.Title = model.Title;

                q.SortOrder = model.SortOrder;

                if (model.ParentId>10000&  dc.T_Category.Select(m =>m.CategoryId).Contains(model.ParentId))

                {

                    q.ParentId =model.ParentId;

                }

                else

                {

                    q.ParentId = null;

                }

                dc.SaveChanges();

                success = true;

                returnMyFunction.WriteJObjectResult(true, 0, "", new JArray(

                    new JObject(

                        newJProperty("id", q.CategoryId),

                        newJProperty("text", q.Title),

                        newJProperty("parentId", q.ParentId),

                        newJProperty("fullpath", q.ParentId == null ? "" :q.Parent.FullPath)

                    )

                ));

            }

        }

        catch (Exception e)

        {

            returnMyFunction.WriteJObjectResult(false, 0, e.Message, null);

        }

    }

    else

    {

       MyFunction.ModelStateToJObject(ModelState, errors);

    }

    returnMyFunction.WriteJObjectResult(success, errors);

}

 

这里要注意的是,如果父id不大于10000,或在分类数据库中不包含该id,就要把父id设置为null。

注意:在数据库T_Category表的trg_CategoryUpdate触发器中有个错误,需要把开头的“SET NOCOUNT ON;”屏蔽掉才能正常更新fullpath和HierarchyLevel。

至此,编辑功能就完成了。下面继续完成删除功能,这与删除文件目录的代码没太大区别。切换到文章管理的控制器,完成onCategoryDelete方法,代码如下:

onCategoryDelete:function () {

    var me = this,

        tree =me.view.down("treepanel"),

        rs =tree.getSelectionModel().getSelection();

    if (rs.length > 0) {

        rs = rs[0];

        if (rs.data.id <= 10000) {

            Ext.Msg.alert("删除类别", "类别“" + rs.data.text + "”不允许删除!");

            return;

        }

        var content = "确定删除类别“" + rs.data.text + "”?<br/><p style='color:red'>注意:该类别下子类将被全部删除,而该类别及其子类的文章会被移动到未分类中。</p>";

        Ext.Msg.confirm("删除类别", content, function (btn) {

            if (btn == "yes") {

                var rs =this.getSelectionModel().getSelection();

                if (rs.length > 0) {

                    rs = rs[0];

                    rs.remove();

                    this.store.sync({

                        success: function (e,opt) {

                            var me = this;

                           me.store.commitChanges();

                            me.view.select(0);

                           me.view.focus(false);

                        },

                        failure: function(e,opt) {

                            var me = this;

                           me.store.rejectChanges()

                           Ext.Msg.alert("发生错误",e.exceptions[0].error);

                        },

                        scope: tree

                    });

                }

            }

        }, tree)

    }

},

 

现在,切换到Category控制器,完成Delete方法。在方法内,先要通过fullpath,一次过把所有子类搜索出来,设置其state值为1。然后把它们包含的文章找出来,设置这些文章的CategoryId值为10000。最后把提交的数据完整返回就行了。具体代码如下:

[AjaxAuthorize(Roles= "普通用户,系统管理员")]

publicJObject Delete()

{

    bool success = false;

    string msg = "";

    JArray ja = null;

    try

    {

        string data = Request["data"]?? "";

        if (string.IsNullOrEmpty(data))

        {

            msg = "错误的提交数据。";

        }

        else

        {

            ja = JArray.Parse(data);

            if (ja.Count > 0)

            {

                JObject jo = (JObject)ja[0];

                var q =dc.T_Category.SingleOrDefault(m => m.CategoryId == (int)jo["id"]);

                if (q != null)

                {

                    q.State = 1;

                    var sub = dc.T_Category.Where(m =>m.FullPath.StartsWith(q.FullPath));

                    foreach (var c in sub)

                    {

                        c.State = 1;

                    }

                    var content =dc.T_Content.Where(m => sub.Select(n =>n.CategoryId).Contains(m.CategoryId));

                    foreach (var c in content)

                    {

                        c.CategoryId = 10000;

                    }

                    dc.SaveChanges();

                    success = true;

                }

                else

                {

                    msg = "该类别已被删除或不存在。";

                }

            }

            else

            {

                msg = "错误的提交数据。";

            }

        }

    }

    catch (Exception e)

    {

        msg = e.Message;

    }

    returnHelper.MyFunction.WriteJObjectResult(success, 0, msg, ja);

}

 

除了处理数据部分,整个处理流程基本是一样的,都是先从data中取得数据,转换,然后从数据库获得数据处理。

余下的小问题是让树显示时选择一个默认节点,而这个要用到《解决Ext JS 4.1版本Tree在刷新时选择第一行的问题》中的解决办法,具体代码如下:

me.view.down("treepanel").getView().on("refresh",function () {

    var tree =this.view.down("treepanel");

    var node = tree.getRootNode().firstChild;

    if (node) {

        tree.getView().select(node);

    }

}, me);

 

至此,文章分类的操作就完成了。下文继续完成文章管理的操作。

源代码:http://vdisk.weibo.com/s/iflJg

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