DWR util.js 学习笔记 整理

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DWR util.js 学习笔记 整理发表:admin 阅读:96次 关键字: 字体:[大 中 小]

 

util.js包含一些有用的函数function,用于在客户端页面调用,它可以和dwr分开,独立营用于你的系统中。 主要功能如下:

 1、$() 获得页面参数值

 2、addOptions and removeAllOptions 初始化下拉框

 3、addRows and removeAllRows 填充表格

 4、getText 取得text属性值

 5、getValue 取得form表单值

 6、getValues 取得form多个值

 7、onReturn

 8、selectRange

 9、setValue

10、setValues

11、toDescriptiveString

 12、useLoadingMessage

13、Submission box

                                                                                                                                                                                                                                                                       

1、$()函数 IE5.0 不支持 $ = document.getElementById 取得form表单值 var name = $("name");                                                                                                                                                                                                                                                                        

2、用于填充 select 下拉框 option a、如果你想在更新select 时,想保存原来的数据,即在原来的select中添加新的option:

 var sel = DWRUtil.getValue(id);

DWRUtil.removeAllOptions(id);

DWRUtil.addOptions(id,...);

DWRUtil.setValue(id,sel);

demo:比如你想添加一个option:“--请选择--”

 DWRUtil.addOptions(id,["--请选择--"]); DWRUtil.addOptions()有5中方式:

@ Simple Array Example: 简单数组 例如: Array array = new Array[ 'Africa', 'America', 'Asia', 'Australasia', 'Europe' ];

 DWRUtil.addOptions("demo1",array);

 @ Simple Object Array Example 简单数组,元素为beans 这种情况下,你需要指定要显示 beans 的 property 以及 对应的 bean 值 例如:

public class Person { private String name; private Integer id; pirvate String address; public void set(){……} public String get(){……} }

DWRUtil.addOptions("demo2",array,'id','name'); 其中id指向及bean的id属性,在optiong中对应value,name指向bean的name属性,对应下拉框中显示的哪个值. @ Advanced Object Array Example 基本同上 DWRUtil.addOptions( "demo3", [{ name:'Africa', id:'AF' }, { name:'America', id:'AM' }, { name:'Asia', id:'AS' }, { name:'Australasia', id:'AU' }, { name:'Europe', id:'EU' } ],'id','name');

@ Map Example 用制定的map来填充 options: 如果 server 返回 Map,呢么这样处理即可:

 DWRUtil.addOptions( "demo3",map); 其中 value 对应 map keys,text 对应 map values; @ and list editing DWRUtil.addOptions() 函数不但可以填出select,开可以填出和这样的heml元素                                                                                                                                                                                                                                                                        

3、addRows and removeAllRows 填充表格

DWR 提供2个函数来操作 table; ----------------------------

DWRUtil.addRows(); 添加行 ----------------------------

DWRUtil.removeAllRows(id);

删除指定id的table ---------------------------- 下面着重看一下 addRows() 函数:

 DWRUtil.addRows(id, array, cellfuncs, [options]); 其中id 对应 table 的 id(更适合tbodye,推荐使用 tbodye) array 是server端服务器的返回值,比如list,map等等 cellfuncs 及用返回值来天春表格 [options] 用来设置表格样式,它有2个内部函数来设置单元格样式(rowCreator、cellCreator)。 比如: server端返回list,而list中存放的是下面这个 bean: public class Person { private String name; private Integer id; pirvate String address; public void set(){……} public String get(){……} } 下面用 DWRUtil.addRows();                                                                                                              胡国清           fzfx88@hotmail.com                                                                                                                           function userList(data){   var delButton = "";   var editButton = ""; var cellfuncs = [ function(data){return data.id;}, function(data){return data.userName;}, function(data){return data.userTrueName;}, function(data){return data.birthday;}, function(data){ var idd = data.id; var delButton = document.createElement(""); delButton.setAttribute("id","delete"); delButton.setAttribute("value","delete"); return delButton; }, function(data){ var idd = data.id; var editButton = document.createElement(""); editButton.setAttribute("name","edit"); editButton.setAttribute("value","edit"); return editButton; } ]; DWRUtil.removeAllRows('tabId'); DWRUtil.addRows('tabId', data,cellfuncs,{ rowCreator:function(options) { var row = document.createElement("tr"); var index = options.rowIndex   50; row.setAttribute("id",options.rowData.id); row.style.collapse = "separate"; row.style.color = "rgb(" + index + ",0,0)"; return row; }, cellCreator:function(options) { var td = document.createElement("td"); var index = 255 - (options.rowIndex   50);   td.style.backgroundColor = "rgb(" + index + ",255,255)"; td.style.backgroundColor = "menu"; td.style.fontWeight = "bold"; td.style.align = "center"; return td; } }); document.getElementById("bt").style.display = "none"; } 待续…………………………………………                                                                                                                                                                                                                                                                           

 

4、getText 取得text属性值 DWRUtil.getText(id): 用来获得 option 中的文本 比如:  苹果 香蕉 鸭梨 调用 DWRUtil.getText("select"); 将返回 "香蕉" 字段; DWRUtil.getText(id);仅仅是用来获得 select 文本值,其他不适用。                                                                                                                                                                                                                                                                          

 5、DWRUtil.getValue(id): 用来获得 form 表单值 有如下几种情况: Text area (id="textarea"): DWRUtil.getValue("textarea")将返回 Text area的值; Selection list (id="select"): DWRUtil.getValue("select") 将返回 Selection list 的值; Text input (id="text"): DWRUtil.getValue("text") 将返回 Text input 的值; Password input (id="password"): DWRUtil.getValue("text") 将返回 Password input 的值; Form button (id="formbutton"): DWRUtil.getValue("formbutton") 将返回 Form button 的值; Fancy button (id="button"): DWRUtil.getValue("formbutton") 将返回 Fancy button 的值;                                                                                                                                                                                                                                                                           

6、getValues 取得form多个值 批量获得页面表单的值,组合成数组的形式,返回 name value; 例如: form():     苹果 香蕉 鸭梨  那么: DWRUtil.getValues({textarea:null,select:null,text:null,password:null,button:null}) 将返回 ^^^^^^^^^^^^^^^^{textarea:1111,select:4444,text:2222,password:3333,button:5555}                                                                                                                                                                                                                                                                           

7、DWRUtil.onReturn 防止当在文本框中输入后,直接按回车就提交表单。                                                                                                                                                                                                                                                                             

8、DWRUtil.selectRange(ele, start, end); 在一个input box里选一个范围 DWRUtil.selectRange("sel-test", $("start").value, $("end").value); 比如: DWRUtil.selectRange("sel-test", 2, 15); 结果 文本框中的值"2345678901234"将被选中'                                                                                                                                                                                                                                                                           

9、DWRUtil.setValue(id,value); 为指定的id元素,设置一个新值;                                                                                         

10、DWRUtil.setValues({ name: "fzfx88", password: "1234567890" } ); 同上,批量更新表单值.                                                                                         

11、DWRUtil.toDescriptiveString() 带debug信息的toString,第一个为将要debug的对象,第二个参数为处理等级。等级如下: 0: Single line of debug 单行调试 1: Multi-line debug that does not dig into child objects 不分析子元素的多行调试 2: Multi-line debug that digs into the 2nd layer of child objects 最多分析到第二层子元素的多行调试  DWRUtil。toDescriptiveString("text",0);                                                                                         

12、DWRUtil.useLoadingMessage(); 当发出ajax请求后,页面显示的提示等待信息; function searchUser(){ var loadinfo = "loading....." try{ regUser.queryAllUser(userList); DWRUtil.useLoadingMessage(loadinfo); }catch(e){ } }