关于gridview中用checkbox全选的几种实现的区别

 这几天为了改变客户端grid的全选效率问题，详细研究了ext中grid的全选和gridview中通过脚本实现的全选效率，总结一下，供大家参考，有错误的地方，希望大侠指正，小弟献丑了。

1、ext的grid 

   Ext.grid.CheckboxColumn = function(config){
        config.id = config.id || 'ck';
        config.columnId = config.id || 'ck';
        return Ext.applyIf(config||{},{
            init:function(grid){
                grid.on('cellclick', this.onCellClick, this);
                grid.on('headerclick',this.onHeaderClick,this);
                }
            ,dataIndex:''
            ,header:'<div class="x-grid3-check-col"></div>'
            ,enableHeaderControl:true
            ,masterValue:false
            ,width:40
            ,align:'center'
            ,fixed:true
            ,headerUnchecked:'<div class="x-grid3-check-col"></div>'
            ,headerChecked:'<div class="x-grid3-check-col x-grid3-check-col-on"></div>'
            ,onHeaderClick:function(grid,columnIndex,event){
                var cIndex = grid.getColumnModel().getIndexById(this.columnId);
                var column = grid.getColumnModel().getColumnById(this.columnId);
                if(cIndex == columnIndex && this.enableHeaderControl!==false){
                    var newValue = (typeof column.masterValue == "undefined")?this.masterValue:!column.masterValue;
                    column.masterValue = newValue;
                    var newHeader = newValue==true?this.headerChecked:this.headerUnchecked;
                    if(column.header != newHeader){
                        column.header = newValue==true?this.headerChecked:this.headerUnchecked;
                        grid.getColumnModel().fireEvent("headerchange",cIndex,newHeader);
                    }
                    grid.getView().updateHeaders();
                    if(this.dataIndex != ''){
                        var ct = grid.getStore().getCount();
                        for(var i=0;i<ct;i++){
                            this.toggleCheck(grid,i,columnIndex,newValue);
                        }
                    }
                }
            }
            ,onCellClick:function(grid,rowIndex,columnIndex,event){
                var cIndex = grid.getColumnModel().getIndexById(this.columnId);
                if(cIndex == columnIndex) this.toggleCheck(grid,rowIndex,columnIndex);
            }
            ,toggleCheck:function(grid,rowIndex,columnIndex,newValue){
                    var td = grid.getView().getCell(rowIndex,columnIndex);
                    var record = grid.getStore().getAt(rowIndex);
                    var startValue = record.data[this.dataIndex];
                    if(this.dataIndex != ''){
                        var newValue = newValue||!Ext.fly(td).hasClass('x-grid3-check-col-on');
                        var e = {
                            grid: grid,
                            record: record,
                            field: this.dataIndex,
                            value: newValue,
                            originalValue: startValue,
                            row: rowIndex,
                            column: columnIndex,
                            cancel: false
                        };
                        if(    (grid.fireEvent("beforeedit",e)!==false && !e.cancel)&&
                            (grid.fireEvent("validateedit",e)!==false && !e.cancel)){
                                record.set(this.dataIndex,newValue);
                                delete e.cancel;
                                grid.fireEvent("afteredit",e);
                        };
                        //计算选择列
                        //SetTransportWAndB()
                        //SetTransportInfo(grid);
                    }        
            }
            ,renderer:function(value,meta,record){
                meta.css = 'x-grid3-check-col-td x-grid3-check-col';
                if(value==true || value=='true' || value=='on' || value==1 || value=='1'|| value=="True"|| value=="true") meta.css += ' x-grid3-check-col-on';
                return '<div class="x-grid3-check-col-inner"> </div>';
            }
        });
    }

这是ext的grid单写checkbox框的实现，后面说明几种情况的效率

2、gridview的两种实现

    a、

function CA1(){
var frm=document.Form1;
for (var i=0;i<frm.elements.length;i++)
{
var e=frm.elements[i];
if ((e.name!='Checkbox2') && (e.type=='checkbox'))
{
e.checked=frm.Checkbox2.checked;
if (frm.Checkbox2.checked)
{
hL(e);
}//endif
else
{
dL(e);
}//endelse

}//endif
}//endfor
}

b、

function selectAll(oCheckbox)
    {
        for(i=1;i<document.all.GridViewGoodsInfo.rows.length;i++)
        {
            //document.all.GridView1.rows(i).cell(0).children(0).checked=oCheckbox.checked;
            GridViewGoodsInfo.rows[i].cells[0].getElementsByTagName("INPUT")[0].checked = oCheckbox.checked;        }
    }

加上ext的grid自带选择框的四种方案中，ext自带方式效率最低，显示500多条记录全选需要时间最长，需要2分钟多钟，才能完成，修改为第一种方案后，1000条数据用时12秒多，在gridview的两种方法里，a的用时最少1000条5秒钟完成，b的稍慢些，6－7秒完成，以上是测试结果，环境不同，效果也不同，这仅是我个人测试的结果，供大家参考