ExtJS GridPanel的ColumnModel 动态加载详解编程语言

var colM = "company,id,flyline"; 
var colMArr = colM.split(","); 
var colLength = colMArr.length; 
var colMArray = new Array(); 
for(var i=0; i<colLength; i++) { 
    colMArray[i] = {header:colMArr[i],width: 75,dataIndex:fieldArray[i]} 
     //此处的fieldArray[i]是fields的数据 
} 
//然后colMarray数组即是我们要动态构造的那个ColumnModel的参数，此处的动态的意 
//思是colM可以从request中获取,然后用来动态创建header即表头信息，同 
//理dataIndex也是一样的 
var column = new Ext.grid.ColumnModel(colMArray); 
//然后GridPanel中的制定cm属性值为column即可

var storeCpye = new Ext.data.GroupingStore({ 
proxy : new Ext.data.HttpProxy({ 
url : 'cxgl_cpye.app?dateTime=' + new Date().getTime() + '&subTranCode=list' 
}), 
reader : new Ext.data.JsonReader({ 
root : 'hstamcx', 
totalProperty : "results", 
fields : ["khbh","bankacc","fundacc","dxjgdm","cpdm","tazh"] 
}),  
sortInfo : { 
field : 'cpdm', 
direction : 'DESC' 
}, 
groupField : 'cpdm' 
}); 
var colMArray = new Array(); 
colMArray = [{header : "产品代码",    dataIndex : "cpdm",    width : 100}, 
{header : "代销机构代码",    dataIndex : "dxjgdm",    width : 100}, 
{header : "客户编号",    dataIndex : "khbh",    width : 100}, 
{header : "理财账号",    dataIndex : "bankacc",    width : 100},  
{header : "客户资金账号",    dataIndex : "fundacc",    width : 100} 
var colQd = new Ext.grid.ColumnModel(colMArray); 
// GRID定义 
var gridCpye = new Ext.grid.GridPanel({ 
id : 'cpye_grid', 
title:'[产品余额]查询', 
height : 800, 
stripeRows : true, 
bodyStyle : 'width:100%', 
disableSelection : true, 
cm : colQd, 
viewConfig : { 
forceFit : false 
}, 
store : storeCpye, 
iconCls : 'details', 
animCollapse : true, 
trackMouseOver : false, 
loadMask : { 
msg : '正在加载[产品余额]信息，请稍侯……' 
}, 
//selModel : smQd, 
selModel : new Ext.grid.RowSelectionModel({singleSelect:true}), 
tbar : ['-',new Ext.form.Label({ 
text : '产品代码:' 
}),new Ext.form.TextField({ 
id : 'cpdm', 
name : 'cpdm', 
width : 130 
}),'-',new Ext.form.Label({ 
text : '代销机构代码:' 
}), new Ext.form.TextField({ 
id : 'dxjgdm', 
name : 'dxjgdm', 
width : 130 
}), '-', { 
pressed : true, 
text : '  查    询    ', 
iconCls : 'yes', 
handler : selinfo 
},'-',new Ext.Toolbar.Fill(),'-',new Ext.form.Label({ 
text : ' 查询方式:  ' 
}),new Ext.form.Radio({ 
id:"cpdm_radio",   
name : "select_method",   
inputValue : "cpdm desc,dxjgdm desc", 
checked : true,     
boxLabel : " 产 品  "  
}),   
new Ext.form.Radio({ 
id:"dxjgdm_radio",   
name : "select_method",   
inputValue : "dxjgdm desc,cpdm desc", 
boxLabel : "代销机构  " 
}),'-' 
], 
bbar : new Ext.PagingToolbar({ 
pageSize : 20, 
store : storeCpye, 
displayInfo : true, 
emptyMsg : '没有记录' 
}) 
}); 
function selinfo(){ 
var cpdm_sel = Ext.get("cpdm").getValue(); 
var dxjgdm_sel = Ext.get("dxjgdm").getValue(); 
var select_method_sel = Ext.get("cpdm_radio").getValue(); 
if(document.getElementById("dxjgdm_radio").checked){ 
select_method_sel = Ext.get("dxjgdm_radio").getValue(); 
colMArray[0] = {header : "代销机构代码",    dataIndex : "dxjgdm",    width : 100}; 
colMArray[1] = {header : "产品代码",    dataIndex : "cpdm",    width : 100}; 
}else{ 
colMArray[0] = {header : "产品代码",    dataIndex : "cpdm",    width : 100}; 
colMArray[1] = {header : "代销机构代码",    dataIndex : "dxjgdm",    width : 100}; 
} 
var params = {}; 
params.cpdm_sel = cpdm_sel; 
params.dxjgdm_sel = dxjgdm_sel; 
params.select_method_sel = select_method_sel; 
//params.whereStr = " and feetype in ('1','2')"; 
storeCpye.baseParams = params; 
colQd = new Ext.grid.ColumnModel(colMArray); 
//gridCpye.reconfigure(storeCpye,colQd), 
    storeCpye.load({ 
callback : function(r, options, success) { 
if (success == true){ 
gridCpye.reconfigure(storeCpye,colQd); 
}else if (success == false) { 
Ext.Msg.alert("错误", storeCpye.reader.jsonData.msg); 
} 
} 
}); 
}