ExtJS 2.0 GridPanel Basic Table Concise Tutorial_extjs

The table functions in ExtJS are very powerful, including sorting, caching, dragging, hiding a certain column, automatically displaying row numbers, column summarization, cell editing and other practical functions.
The table is defined by the class Ext.grid.GridPanel, inherited from Panel, and its xtype is grid. In ExtJS, the table Grid must contain column definition information and specify the table's data storage Store. The column information of the table is defined by the class Ext.grid.ColumnModel, and the data storage of the table is defined by Ext.data.Store. The data storage is divided into JsonStore, SimpleStroe, GroupingStore, etc. according to the parsed data.
Let’s first look at the simplest code using tables:

Copy the code The code is as follows:

Ext.onReady(function(){
var data=[ [1, 'EasyJWeb', 'EasyJF','www.baidu.com'],
[2, 'jfox', 'huihoo ','www.jb51.net'],
[3, 'jdon', 'jdon','s.jb51.net'],
[4, 'springside', 'springside','tools .jb51.net'] ];
var store=new Ext.data.SimpleStore({data:data,fields:["id","name","organization","homepage"]});
var grid = new Ext.grid.GridPanel({
renderTo:"hello",
title:"China Java Open Source Products and Team",
height:150,
width:600,
columns:[{header:"Project Name",dataIndex:"name"},
{header:"Development Team",dataIndex:"organization"},
{header:"Website",dataIndex: "homepage"}],
store:store,
autoExpandColumn:2
});
});

Execute the above code to get a simple The table is as shown below:

In the above code, the first line "var data=..." is used to define the data to be displayed in the table, which is a [][] two-dimensional array ; The second line "var store=..." is used to create a data store. This is the configuration attribute GridPanel needs to use. The data store Store is responsible for storing various data (such as two-dimensional arrays, JSon object arrays, xml text), etc. Convert it to the ExtJS data record set Record. We will introduce the data storage Store specifically in the next chapter. The third line "var grid = new Ext.grid.GridPanel(...)" is responsible for creating a table. The columns contained in the table are described by the columns configuration attribute. Columns is an array. Each row of data elements describes a column of information in the table. Column information includes the column header display text (header), the record set field corresponding to the column (dataIndex), whether the column is sortable (sorable), the column's rendering function (renderer), width (width), formatting information (format), etc. In the above example, only header and dataIndex are used.
Let’s take a brief look at the sorting and hidden column features of the table, and simply modify the above code. The content is as follows:

Copy code The code is as follows:

Ext.onReady(function(){
var data=[ [1, 'EasyJWeb', 'EasyJF','www.baidu.com '],
[2, 'jfox', 'huihoo','www.jb51.net'],
[3, 'jdon', 'jdon','s.jb51.net'],
[4, 'springside', 'springside','tools.jb51.net'] ];
var store=new Ext.data.SimpleStore({data:data,fields:["id","name ","organization","homepage"]});
var colM=new Ext.grid.ColumnModel([{header:"Project Name",dataIndex:"name",sortable:true},
{ header:"Development Team",dataIndex:"organization",sortable:true},
{header:"Website",dataIndex:"homepage"}]);
var grid = new Ext.grid.GridPanel( {
renderTo:"hello",
title:"China Java Open Source Products and Team",
height:200,
width:600,
cm:colM,
store: store,
autoExpandColumn:2
});
});

Directly use new Ext.grid.ColumnModel to create the column definition information of the table, in "Project Name" "In the "and "Development Team" column, we added the attribute "sortable" to "true", indicating that the column can be sorted. By executing the above code, we can get a table that supports pressing "Project Name" or "Development Team", as shown in Figure xxx Show.

(Sort by project name)

(The small button behind the sortable list header can pop up the operation menu)

(Can be specified Which columns are hidden)
In addition, the data rendering method of each column can also be defined by yourself. For example, in the table above, we hope that users click on the URL in the table to directly open the websites of these open source teams, that is, the URL column needs to be Add a super link. The following code implements this function:

Copy the code The code is as follows:

function showUrl(value)
{
return "" value "";
}
Ext.onReady(function(){
var data=[ [1, 'EasyJWeb', 'EasyJF','www.baidu.com'],
[2, 'jfox', 'huihoo','www.jb51.net'],
[3, 'jdon', 'jdon','s.jb51.net'],
[4, 'springside', 'springside','tools.jb51.net'] ];
var store=new Ext.data.SimpleStore( {data:data,fields:["id","name","organization","homepage"]});
var colM=new Ext.grid.ColumnModel([{header:"Project Name",dataIndex :"name",sortable:true},
{header:"development team",dataIndex:"organization",sortable:true},
{header:"website",dataIndex:"homepage",renderer: showUrl}]);
var grid = new Ext.grid.GridPanel({
renderTo:"hello",
title:"China Java Open Source Products and Team",
height:200,
width:600,
cm:colM,
store:store,
autoExpandColumn:2
});
});
[html]

The above code is not much different from the previous example, except that there is an additional renderer attribute when defining the "URL" column, namely {header: "URL", dataIndex: "homepage", renderer: showUrl}. showUrl is a custom function whose content is to return an html fragment containing the tag based on the value parameter passed in. Running the above code displays the result as shown below:


The custom column rendering function can display all kinds of information you need in the cell, but the browser can handle it html can be used.
In addition to secondary arrays, can the table display data in other formats? The answer is yes, let’s assume that our table data data is defined in the following form:

[code]
var data=[{id:1,
name:'EasyJWeb',
organization:'EasyJF',
homepage:'www.baidu.com'},
{id:2,
name:'jfox',
organization:'huihoo',
homepage:'www.jb51.net'},
{id:3,
name:'jdon',
organization:'jdon',
homepage:'s.jb51.net' },
{id:4,
name:'springside',
organization: 'springside',
homepage:'tools.jb51.net'}
];

In other words, the data becomes a one-dimensional array. Each element in the array is an object. These objects include attributes such as name, organization, homepage, and id. To make the table display the above data, it is actually very simple. You only need to change the store to use Ext.data.JsonStore. The code is as follows:

Copy code The code is as follows:

var store=new Ext.data.JsonStore({data:data,fields:["id","name","organization" ,"homepage"]});
var colM=new Ext.grid.ColumnModel([{header:"Project Name",dataIndex:"name",sortable:true},
{header:"Development Team ",dataIndex:"organization",sortable:true},
{header:"Website",dataIndex:"homepage",renderer:showUrl}]);
var grid = new Ext.grid.GridPanel({
renderTo:"hello",
title:"China Java Open Source Products and Team",
height:200,
width:600,
cm:colM,
store:store ,
autoExpandColumn:2
});

The above code gives the same result as the previous one. Of course, the table can also display data in xml format. If the above data is stored in the hello.xml file, the content is as follows:

Copy code The code is as follows:

1 EasyJWeb EasyJF www.baidu.com 2 < ;name>jfox huihoo www.jb51.net 3 jdon jdon s.jb51.net 4 springside tools.jb51.net

In order to display this xml data using the ExtJS table Grid, we only need to adjust the content of the store part to the following content:

Copy code The code is as follows:

var store=new Ext.data.Store({
url:"hello.xml",
reader:new Ext.data.XmlReader({
record:" row"},
["id","name","organization","homepage"])
});

No need to change other parts, complete The code is as follows:

Copy code The code is as follows:

function showUrl(value)
{
return "" value "";
}
Ext.onReady (function(){
var store=new Ext.data.Store({
url:"hello.xml",
reader:new Ext.data.XmlReader({
record:"row "},
["id","name","organization","homepage"])
});
var colM=new Ext.grid.ColumnModel([{header:"Project name ",dataIndex:"name",sortable:true},
{header:"development team",dataIndex:"organization",sortable:true},
{header:"website",dataIndex:"homepage" ,renderer:showUrl}]);
var grid = new Ext.grid.GridPanel({
renderTo:"hello",
title:"China Java Open Source Products and Team",
height: 200,
width:600,
cm:colM,
store:store,
autoExpandColumn:2
});
store.load();
});

store.laod() is used to load data. The table generated by executing the above code is exactly the same as the previous one.