asp.net gridview中用checkbox全选的几种实现的区别


            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