Coolite一个简单例子-GridPanel列表增删改预览

本篇教程:Coolite Toolkit中文站首发。

我从http://www.cnblogs.com/magical/archive/2009/10/27/1590701.html转载。

 

 

这个例子只是Coolite一个很简单的应用,我相信新手学习还是用的到的.也给大家带个头,写篇新手教程.

GridPanel就不作介绍了,asp.net开发人员应该比较熟悉了.官方的GridView绑定数据是通过SqlDataSource,ObjectDataSource等绑定的.

这里,GridPanel需要Store来绑定数据.首先在页面添加一个Store,如下:

<ext:Store ID="Store1" runat="server" OnRefreshData="RefreshData"> <Reader> <ext:JsonReader ReaderID="Id"> <Fields> <ext:RecordField Name="Id" /> <ext:RecordField Name="Title" /> <ext:RecordField Name="Content" /> <ext:RecordField Name="NewsTime" /> <ext:RecordField Name="Category" /> </Fields> </ext:JsonReader> </Reader> </ext:Store>

 

这里,我使用了JsonReader,还有ArrayReader,XmlReader.JsonReader绑定的数据格式是JSON类型的,这里在后台我绑定的是DataTable,关键部分Fields下面,Name指定的名字,必须和你后台要绑定的数据里字段名称一致.ReaderID我理解是相当于指定了一个主键吧.这里只是演示,看关键部分:

protected void Bind() { string sql = "SELECT NewsInfo.Id, NewsInfo.Title, NewsInfo.Content,NewsInfo.NewsTime, " + "CategoryInfo.Category FROM NewsInfo, CategoryInfo WHERE NewsInfo.Category = CategoryInfo.Id order by NewsInfo.Id"; DataTable dt = DbHelper.GetDataTable(sql); this.Store1.DataSource = dt; this.Store1.DataBind(); }

 

不用去管,我的SQL语句怎么写的,返回DataTable就行了.和GridView一样,DataSource指定数据,然后DataBind(); OK,数据绑定完毕.一般情况下在Page_Load里调用.下面准备GridPanel吧.

<ext:GridPanel ID="GridPanel1" runat="server" Title="新闻列表" Width="840" AutoHeight="true" Frame="false" StoreID="Store1" Icon="Information"> <TopBar> <ext:Toolbar ID="Toolbar1" runat="server"> <Items> <ext:Button ID="Add" runat="server" Text="添加新闻" Icon="TableAdd"> <Listeners> <Click Handler="News.BindNewsCate();#{Window1}.show();" /> </Listeners> </ext:Button> <ext:TextField ID="txtNewKey" runat="server" AllowBlank="false" EmptyText="请输入搜索关键字!"> </ext:TextField> <ext:Button ID="btnSearch" runat="server" Text="查 找" Icon="Find"> <AjaxEvents> <Click OnEvent="SearchNews"> <EventMask ShowMask="true" Msg="正在搜索..." /> </Click> </AjaxEvents> </ext:Button> </Items> </ext:Toolbar> </TopBar> <ColumnModel runat="server" ID="ct102"> <Columns> <ext:Column ColumnID="id" DataIndex="Id" Width="60" Header="序号" Hidden="false"> <PrepareCommand Handler="" Args="grid,command,record,row,col,value" FormatHandler="False"> </PrepareCommand> </ext:Column> <ext:Column ColumnID="title" DataIndex="Title" Width="150" Header="新闻标题"> <PrepareCommand Handler="" Args="grid,command,record,row,col,value" FormatHandler="False"> </PrepareCommand> </ext:Column> <ext:Column ColumnID="content" DataIndex="Content" Width="280" Header="新闻内容"> <PrepareCommand Handler="" Args="grid,command,record,row,col,value" FormatHandler="False"> </PrepareCommand> </ext:Column> <ext:Column ColumnID="category" DataIndex="Category" Width="100" Header="新闻分类"> <PrepareCommand Handler="" Args="grid,command,record,row,col,value" FormatHandler="False"> </PrepareCommand> </ext:Column> <ext:Column ColumnID="newsTime" DataIndex="NewsTime" Width="100" Header="发布时间"> <PrepareCommand Handler="" Args="grid,command,record,row,col,value" FormatHandler="False"> </PrepareCommand> </ext:Column> <ext:ImageCommandColumn Width="100" Header="操作" ColumnID="Comman" Resizable="true"> <Commands> <ext:ImageCommand CommandName="Delete" Icon="TableDelete" Text="删除"> <ToolTip Text="Delete" /> </ext:ImageCommand> <ext:ImageCommand CommandName="Edit" Icon="TableEdit" Text="编辑"> <ToolTip Text="Edit" /> </ext:ImageCommand> </Commands> <PrepareGroupCommand Handler="" Args="grid,command,groupId,group" FormatHandler="False"> </PrepareGroupCommand> <PrepareCommand Fn="prepareCommand" /> </ext:ImageCommandColumn> <ext:Column ColumnID="details" DataIndex="Id" Width="50" Header="预览" Sortable="false" MenuDisabled="true"> <PrepareCommand Handler="" Args="grid,command,record,row,col,value" FormatHandler="False"> </PrepareCommand> <Renderer Fn="details" /> </ext:Column> </Columns> </ColumnModel> <SelectionModel> <ext:RowSelectionModel runat="server" ID="rowselect"> </ext:RowSelectionModel> </SelectionModel> <LoadMask ShowMask="true" Msg="正在加载..." /> <BottomBar> <ext:PagingToolbar runat="server" PageSize="15" StoreID="Store1" ID="paging"> </ext:PagingToolbar> </BottomBar> <Listeners> <Command Fn="gridCommand" /> </Listeners> <%--<AjaxEvents> <Command OnEvent="OnCommand_Click"> <ExtraParams> <ext:Parameter Name="type" Value="command" Mode="Raw"> </ext:Parameter> <ext:Parameter Name="id" Value="record.data.Id" Mode="Raw"> </ext:Parameter> </ExtraParams> </Command> </AjaxEvents> 这里注释掉的部分就是,可以后台判断编辑删除的,Parameter是传向后台的参数--%> </ext:GridPanel> 

 

GridPanel的StoreID指定了数据从哪个Store来, Columns下面的<ext:Column里的DataIndex必须和指定的Store里的Name一致.

编辑与删除,我使用了ImageCommandColumn ,指定CommandName,执行Command时需要判断的.预览使用<Renderer Fn="details" />,自定义的.这里Fn指定的是JavaScript方法

function details(Id) { var temp = '<a href="Details.aspx?Id={0}" mce_href="Details.aspx?Id={0}" target="_blank" style="color:blue" mce_style="color:blue">查看</a>'; return String.format(temp, Id); } 

 

Id即每行数据的主键列,Readerer应该是在GridPanel初始化时执行的.SelectionModel指定列表选择模式,PagingToolbar分页工具栏.下面 指定了对ImageCommandColumne的Commands的单击事件监听.同样,指定了Js方法,也可以后台判断,不过我主张在前台判断 

var gridCommand = function(command, record, rowIndex) { if (command == "Edit") { var id = record.data.Id; //通过id从后台获取content内容,并添加到fck里. News.GetContentById(id, { success: function(result) { var Editor = FCKeditorAPI.GetInstance('FCKeditor2'); Editor.SetHTML(result); } }); var title = record.data.Title; //新闻标题 var category = record.data.Category; //新闻分类 //设置编辑窗的值 News.EditSetNews(id, title, category, { success: function(result) { News.BindNewsCate(); Window2.show(); } }); } if (command == "Delete") { Ext.Msg.confirm('提示', '是否确定删除该条新闻?', function(btn) { if (btn == 'yes') { News.DeleteNews(record.data.Id); } }); } }; 

 

这里的参数列表按照这个的顺序就可以了,Args="grid,command,record,row,col,value" ,具体参数多少,视你的需求.command就是上面指定的CommandName,

这里就可以判断下了,是编辑还是删除操作.可以看到js里有一个News调用了一个后台AjaxMethod方法,News就相当于Coolite.AjaxMethods,如下:

<ext:ScriptManager ID="ScriptManager1" runat="server" AjaxMethodNamespace="News"> </ext:ScriptManager> 

 

AjaxMethodNamespace 指定了News.GetContentById 给后台传递了Id,我希望能返回新闻的正文,因为我需要给编辑窗口赋值,编辑窗口我使用的是Fckeditor,

也是ASP.NET控件.var Editor = FCKeditorAPI.GetInstance('FCKeditor2'); 调用Fck的API,Editor.SetHTML(result); 将返回值赋给Fck对象.这里为什么要这样赋值,尝试这样做的朋友,应该清楚,通过Coolite的Ajax机制传值,在后台无法获取非Coolite控件的值.感谢zork的指导,呵呵.根据Id取出内容的代码就不贴了,后台标记为[AjaxMethod()]的方法,返回String.这里比较折腾人,其它字段,又需要到后台设置一下,News.EditSetNews.呵呵.希望有更好的解决办法.News.BindNewsCate();

这是我希望在点击编辑的时候,Winodw2 show出来之前,重新绑定下新闻分类,因为用户很可能这里在另一个页面添加了新分类.这里我提前在页面放了一个window:

<ext:Window ID="Window2" runat="server" AutoHeight="true" Width="800" Maximizable="true" Modal="true" Title="编辑新闻" Icon="TableEdit" AutoShow="false"> <Body> <ext:FormPanel ID="FormPanel2" runat="server" BodyStyle="padding:5px;" ButtonAlign="Right" Frame="true" AutoHeight="true" AutoWidth="true" Icon="NewspaperAdd"> <Body> <ext:FormLayout ID="FormLayout2" runat="server"> <ext:Anchor Horizontal="100%"> <ext:TextField ID="TextField2" runat="server" FieldLabel="新闻标题" AllowBlank="false" BlankText="请输入新闻标题!"> </ext:TextField> </ext:Anchor> <ext:Anchor Horizontal="100%"> <ext:ComboBox ID="ComboBox2" runat="server" StoreID="Store2" DisplayField="Category" AllowBlank="false" ValueField="Id" EmptyText="选择一项..." FieldLabel="新闻分类"> </ext:ComboBox> </ext:Anchor> <ext:Anchor Horizontal="%100"> <ext:Panel runat="server" ID="_editArea2" AutoWidth="true" Height="500"> <Body> <fckeditorv2:fckeditor id="FCKeditor2" runat="server"> </fckeditorv2:fckeditor> </Body> </ext:Panel> </ext:Anchor> <ext:Anchor Horizontal="%100"> <ext:Hidden ID="Hidden1" runat="server"> </ext:Hidden> </ext:Anchor> </ext:FormLayout> </Body> <Buttons> <ext:Button ID="Button3" runat="server" Icon="Disk" Text="保存"> <Listeners> <Click Fn="SaveNews" /> </Listeners> </ext:Button> <ext:Button ID="Button4" runat="server" Icon="Cancel" Text="取消"> <Listeners> <Click Handler="Window2.hide();" /> </Listeners> </ext:Button> </Buttons> </ext:FormPanel> </Body> </ext:Window> 

 

AutoShow=”false”,页面加载不显示,<Click Fn="SaveNews" /> ,保存还是得获取编辑窗的值,还是使用js方法:

//保存编辑新闻 var SaveNews = function() { var Editor = FCKeditorAPI.GetInstance('FCKeditor2'); var content = Editor.GetXHTML(true); //编辑器里的内容 News.EditSaveNews(content); } 

 

将编辑窗的值再传到后台,这里content是编辑窗的HTML源码,传到后台Coolite已经编码了,所以在后台保存到数据库之前,得解码一下,不然下次取出来,还是得解码.还有一个Hidden是为了保存编辑信息的ID,用于更新.

string newsContent = HttpUtility.HtmlDecode(content); 

 

编辑功能到此为止.删除操作就相对简单些了,给个提示,YES就执行删除,同样调用后台删除方法.

[AjaxMethod()] public void DeleteNews(int Id) { string sql = "delete from NewsInfo where Id = " + Id + ""; int result = DbHelper.ExecuteSql(sql); if (result > 0) { //删除成功 Ext.Msg.Show(new MessageBox.Config { Title = "消息", Message = "已成功删除指定新闻条目!", Icon = MessageBox.Icon.INFO, Buttons = MessageBox.Button.OK }); this.Bind(); //重新给Store指定数据 } else { //删除失败 Ext.Msg.Show(new MessageBox.Config { Title = "消息", Message = "删除新闻失败,请重新操作!", Icon = MessageBox.Icon.ERROR, Buttons = MessageBox.Button.OK }); } } 

 

删除成功后,提示一下,然后重新Bind().预览查看,需要结合页面,这里就不谈了.也只是指定了一个预览路径.再来看下添加,我在Toolbar添加了一个Button,然后弹出预先准备的Window1:

<ext:Window ID="Window1" runat="server" AutoHeight="true" Width="800" Maximizable="true" Modal="true" Title="添加新闻" Icon="TableAdd" AnimateTarget="Add"> <Body> <ext:FormPanel ID="FormPanel1" runat="server" BodyStyle="padding:5px;" ButtonAlign="Right" Frame="true" AutoHeight="true" AutoWidth="true" Icon="NewspaperAdd"> <Body> <ext:FormLayout ID="FormLayout1" runat="server"> <ext:Anchor Horizontal="100%"> <ext:TextField ID="TextField1" runat="server" FieldLabel="新闻标题" AllowBlank="false" BlankText="请输入新闻标题!" EmptyText="这里输入新闻标题."> </ext:TextField> </ext:Anchor> <ext:Anchor Horizontal="100%"> <ext:ComboBox ID="ComboBox1" runat="server" StoreID="Store2" DisplayField="Category" AllowBlank="false" ValueField="Id" EmptyText="选择一项..." FieldLabel="新闻分类"> </ext:ComboBox> </ext:Anchor> <ext:Anchor Horizontal="%100"> <ext:Panel runat="server" ID="_editArea" AutoWidth="true" Height="500"> <Body> <fckeditorv2:fckeditor id="FCKeditor1" runat="server" value=""> </fckeditorv2:fckeditor> </Body> </ext:Panel> </ext:Anchor> </ext:FormLayout> </Body> <Buttons> <ext:Button ID="Button1" runat="server" Icon="Disk" Text="发布"> <Listeners> <Click Fn="addnews" /> </Listeners> </ext:Button> <ext:Button ID="Button2" runat="server" Icon="Cancel" Text="取消"> <Listeners> <Click Handler="Window1.hide();" /> </Listeners> </ext:Button> </Buttons> </ext:FormPanel> </Body> </ext:Window> 

 

<Click Fn=”addnews”/>和编辑原理一样,获取编辑器里的内容,调用后台添加方法.添加之后也注意Bind()一下.还有一个功能就是搜索了,输入关键字,我这里是一个简单搜索,在Title和Content里搜索. protected void SearchNews(object sender, AjaxEventArgs e) { string newkey = this.txtNewKey.Text; if (newkey.Equals("")) { Ext.Msg.Show(new MessageBox.Config { Title = "提示", Message = "请输入您要搜索的关键字!", Buttons = MessageBox.Button.OK, Icon = MessageBox.Icon.INFO }); } else { string sql = "SELECT NewsInfo.Id, NewsInfo.Title, NewsInfo.Content,NewsInfo.NewsTime, " + "CategoryInfo.Category FROM NewsInfo, CategoryInfo WHERE NewsInfo.Category = CategoryInfo.Id " + "and (NewsInfo.Title like '%" + newkey + "%' or NewsInfo.Content like '%" + newkey + "%') order by NewsInfo.Id"; DataTable dt = DbHelper.GetDataTable(sql, CommandType.Text, new OleDbParameter[] { }); if (dt.Rows.Count > 0) { this.Store1.DataSource = ChangeDataTable(dt); this.Store1.DataBind(); } else { Ext.Msg.Show(new MessageBox.Config { Title = "搜索结果", Message = "没有找到 <font color='red'>" + newkey + "</font> 的相关内容!", Buttons = MessageBox.Button.OK, Icon = MessageBox.Icon.INFO }); } } }   

 

全部功能及流程就是这些,肯定会有一些没有讲到或讲的不周到的地方,大家尽管提出来,共同学习,提高!

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