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JQuery UI Theming/API

jqGrid 问题笔记

marz posted @ Aug 11, 2010 07:17:30 AM in js-libraries with tags jqgrid problem note tricks cheats , 7343 readers

 

所谓问题可能不是jqgrid本身问题，而是浏览器或应用的特殊需要而产生的问题。

 

01.单元格内的文本自动换行 ：

 

加入样式：

 

.ui-jqgrid tr.jqgrow td {

    white-space: normal !important;

    height:auto;

    vertical-align:text-top;

    padding-top:2px;

}

 

具体说明可参阅： http://blog.qumsieh.ca/2009/12/03/jqgrid-textword-wrapping/

 

 

02.保持显示垂直滚动条

 

在IE中记录比较少的时候，默认情况下不显示垂直滚动条，会出现标题行与数据行位置对不齐的情况，通过保持显示垂直滚动条可以解决这个问题。

 

    $( pGridId ).closest(".ui-jqgrid-bdiv").css({ 'overflow-y' : 'scroll' });

 

需要保持水平滚动条，则：

    $( pGridId ).closest(".ui-jqgrid-bdiv").css({ 'overflow-x' : 'scroll' });

 

 

 

 

03.控制列的水平宽度

 

当表字段比较多时，如果按照colModel指定的宽度，整个jqGrid宽度会太宽，我们通常希望控制一下grid的宽度，并同时保持各列的指定宽度。

可以指定jgrid的参数 shrinkToFit:false 。shrinkToFit属性用来说明当初始化列宽度时候的计算类型，如果为ture，则按比例初始化列宽度。如果为false，则列宽度使用colModel指定的宽度。

同时需要控制jqgrid的宽度。通过autowidth:true属性可以达到目地。

 

04. 高度随记录数自动变化.

 

使用 height: 'auto' 参数 .

 

不理想的是，在IE6中，当字段比较多并出现水平滚动条时，感觉会比较难受。参考保持垂直滚动条的办法，保持一个水平滚动条，高度是对了。( 使用的Firefox3.6没发现这个问题, 所以说IE比较烂并不是空穴来风 )

 

 

Js代码

  1. if($.browser.msie) {      
  1.     // 保持垂直滚动条   
  1.     // $( pGridId ).closest(".ui-jqgrid-bdiv").css({ 'overflow-y' : 'scroll' });    
  2.     // 保持水平滚动条  
  3.     $( pGridId ).closest(".ui-jqgrid-bdiv").css({ 'overflow-x' : 'scroll' });    
  4. }  

  

 

 

 

 

05. jqgrid 和 validation 插件一起使用的问题

 

在提交表单的时候，会报错：'settings' is null or not an object.  'setting'为空或不是对象. 

 

http://www.trirand.com/blog/?page_id=393/help/jqgrid-validation-plugin-issue/ 有这样的问题报告，

 

目前还是有这样的问题。

 

 

06. 动态修改 jqgrid 提交的参数 

 

具体的说明可以参考 http://www.trirand.com/jqgridwiki/doku.php?id=wiki:post_data_module  

 

这里举个例子：当你需要根据用户的输入过滤 jqgrid 的显示数据，可以这样实现，

 

Js代码

  1. userName = $( '#userName' ).val( );   // input 的值  
  1.   
  1. userCode =  $( '#userCode' ).val( );   // input 的值  
  2.   
  1. jQuery('#grid_user').appendPostData( { userName :userName , userCode :userCode }   
  1.   
  2. 这样，刷新 grid 数据时，提交到服务器的数据将包含这 userName 和 userCode两项。  

  

 

07. Editing form 提交时，动态添加数据项 

 

在以 Form Editing 方式添加或修改数据，如何在提交时动态的添加或修改一些项目呢？

 

一个典型的例子是添加文章记录时，在提交的数据中添加当前时间这个项目。

 

参考 http://www.trirand.com/jqgridwiki/doku.php?id=wiki:form_editing 可以知道：

 

在表单提交前，将触发事件 beforeSubmit ， 所以我们可以在这个事件里做些事情。

 

Js代码

  1. // 提交前  
  1. fn_beforeSubmit = function( postdata, formid ) {   
  1.     // 添加或修改 postdata 项目值             
  1.     postdata[ 'uploadDate' ] = new Date().format("yyyy/MM/dd") ;    
  1.     postdata[ 'uploadTime' ] = new Date().format("hh:mm:ss") ;    
  1.                                           
  1.     return[true,''];   // 提交  
  1.                           
  1. };  
  1.   
  1. // 添加记录 options   
  2. Options_add = {  
  3.         width:500,  
  4.         height:290,  
  5.         reloadAfterSubmit:true,  
  1.         jqModal:true,   
  1.         beforeSubmit:       fn_beforeSubmit,  
  1.         ......  
  2. }  
  3.   
  1. // 配置 jqgrid nav  
  2. jQuery( pGridId ).jqGrid('navGrid',pPageId, {edit:true,add:true,del:true,search:false,refresh:true,view:true,addtext:'添加',edittext:'修改',deltext:'删除' }, //options   
  1.         {height:290,reloadAfterSubmit:false, jqModal:true, closeOnEscape:true, bottominfo:"标记有*的字段不能为空"}, // edit options   
  1.         Options_add, // add options   
  1.         {reloadAfterSubmit:false,jqModal:true, closeOnEscape:true }, // del options   
  1.         {closeOnEscape:true}, // search options   
  1.         {height:250,jqModal:false,closeOnEscape:true} // view options   
  1.     );   

  

 

 

08.  Editing form 中上传文件 

 

待续 ......

 

 

 

09.  不显示中间的分页器或右边的记录信息 

 

通过 FireBug可以发现 jqgrid  pager中各部分的命名规则： pager id + _left/_center/_right。

 

pPageId = '#pager_grid' ;

$( pPageId + "_center" ).remove( );    // 删除中间分页器

 

 

另外，也可以通过控制 css 实现。

 

参考：

 jqgrid  Tips, Tricks and Hacks -  To use the nav bar for buttons but hide the pager, using CSS

10 JQGrid Tips learned from my experience - tip5,tip6

 

 

10.  取得记录行序号 

 

jqGrid提供的方法一般只能取得记录的 id 号。使用 $('#jqgrid1').jqGrid('getDataIDs') 方法可以获得各行的id数组，此数组相应元素的索引号就是记录行序号了(从0开始)。

 

可以参考:

http://www.trirand.com/blog/?page_id=393/help/to-get-the-rowid-of-the-nth-row-of-the-grid/

 

Found the answer using $('#gridmain').jqGrid('getDataIDs');

It will return an array of ids for the visible grid.

So to get the nth rowid, i use:

var rids = $('#gridmain').jqGrid('getDataIDs');

var nth_row_id = rids[n-1]; //bec the row array starts from zero.

Hope it will help others, if interested.

 

 

 

 

 

其他参考：

 

10 JQGrid Tips learned from my experience

http://veechand.wordpress.com/2009/07/13/10-jqgrid-tips-learned-from-my-experience/

 

 

jqGrid and JQuery UI tabs showing grids expanded only on primary tab (div)

 

 

http://stackoverflow.com/questions/2117687/jqgrid-and-jquery-ui-tabs-showing-grids-expanded-only-on-primary-tab-div

 

 

源文档 <http://forestkqq.javaeye.com/blog/602944>

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