Javascript extjs的舍入问题
我需要将文本字段四舍五入到2位小数。下面是我设置的带有警报消息的代码。我担心的是,当我添加第三个或更多数字时,问题就会出现。 例如,100+10.11=110.11,(result=)然后110.11+10.11=120.22,但是,当我添加第三个数字120.22+10.11时,它等于130.3299999998,我希望它等于130.33 在添加的第三个数字中,最疯狂的是“result”字段等于130.3299999998Javascript extjs的舍入问题,javascript,rounding,Javascript,Rounding,我需要将文本字段四舍五入到2位小数。下面是我设置的带有警报消息的代码。我担心的是,当我添加第三个或更多数字时,问题就会出现。 例如,100+10.11=110.11,(result=)然后110.11+10.11=120.22,但是,当我添加第三个数字120.22+10.11时,它等于130.3299999998,我希望它等于130.33 在添加的第三个数字中,最疯狂的是“result”字段等于130.3299999998 tbar: [{ text: 'Add',
tbar: [{
text: 'Add',
tooltip:'Add the line item',
handler : function(){
var r = new iLineItemRec({
i_line_item_name: '',
i_line_item_amt: ''
});
iLineItemGrid.stopEditing();
iLineItemStore.insert(0, r);
iLineItemGrid.startEditing(0, 0);
Ext.getCmp('mike').setDisabled(false);
},
//Should this be scope:this or scope:iLineItemGrid?
scope:this
},
{
text: 'Delete',
tooltip:'Remove the selected line item',
handler: function(){
iLineItemGrid.stopEditing();
var r = iLineItemGrid.getSelectionModel().getSelectedCell();
iLineItemStore.removeAt(r[0]);
},
//Should this be scope:this or scope:iLineItemGrid?
scope:this
},
{
xtype: 'tbfill'
},
{
id: 'mike',
text: 'Submit',
tooltip:'Submit the line item',
//new
//disabled: true,
handler: function(){
iLineItemGrid.stopEditing();
// Will this code save changes to the database?
//iLineItemGrid.getStore().commitChanges();
iLineItemStore.commitChanges();
var iAmountTotalForLineItems = 0;
var iAmountInDueField = Ext.getCmp('iAmountDue').value;
var tempTotal = 0;
var result = 0;
iLineItemStore.each(function(addAmount){
iAmountTotalForLineItems += addAmount.get('i_line_item_amt');
});
alert('1 iAmountInDueField: ' + iAmountInDueField +' iLineItemTotalHold: '+iLineItemTotalHold + ' iAmountTotalForLineItems: '+ iAmountTotalForLineItems);
if (iLineItemTotalHold > iAmountTotalForLineItems ){
alert ('if');
tempTotal = iLineItemTotalHold - iAmountTotalForLineItems;
result = iAmountInDueField - tempTotal;
alert('two: '+result+' = '+iAmountInDueField+' - '+tempTotal );
}
else if (iLineItemTotalHold < iAmountTotalForLineItems ){
alert ('if2');
tempTotal = iAmountTotalForLineItems - iLineItemTotalHold;
result = iAmountInDueField + tempTotal;
alert('3: '+result+' = '+iAmountInDueField+' + '+tempTotal );
}
iLineItemTotalHold = iAmountTotalForLineItems;
Ext.getCmp('iAmountDue').setValue(result);
this.setDisabled(true);
}
//scope:this
}
]
tbar:[{
文本:“添加”,
工具提示:“添加行项目”,
处理程序:函数(){
var r=新的iLineItemRec({
i\u行\u项\u名称:“”,
i\行\项目\金额:“”
});
iLineItemGrid.stopEditing();
iLineItemStore.insert(0,r);
iLineItemGrid.startEditing(0,0);
Ext.getCmp('mike').setDisabled(false);
},
//这应该是scope:this还是scope:iLineItemGrid?
范围:本
},
{
文本:“删除”,
工具提示:“删除所选行项目”,
处理程序:函数(){
iLineItemGrid.stopEditing();
var r=iLineItemGrid.getSelectionModel().getSelectedCell();
iLineItemStore.removeAt(r[0]);
},
//这应该是scope:this还是scope:iLineItemGrid?
范围:本
},
{
xtype:'tbfill'
},
{
id:'迈克',
文本:“提交”,
工具提示:“提交行项目”,
//新的
//残疾人:对,,
处理程序:函数(){
iLineItemGrid.stopEditing();
//此代码是否将更改保存到数据库?
//iLineItemGrid.getStore().commitChanges();
iLineItemStore.commitChanges();
var iAmountTotalForLineItems=0;
var iamountIndudeField=Ext.getCmp('iAmountDue')。值;
总风险=0;
var结果=0;
iLineItemStore.each(函数(addAmount){
iAmountTotalForLineItems+=addAmount.get('i_line_item_amt');
});
警报('1 IAMountIndudeField:'+IAMountIndudeField+'iLineItemTotalHold:'+iLineItemTotalHold+'iAmountTotalForLineItems:'+iAmountTotalForLineItems);
如果(iLineItemTotalHold>iMountTotalForLineItems){
警报(“如果”);
TENTOTAL=iLineItemTotalHold-行项目的IAMOUNTTOTALL;
结果=IAMOUNT INDUNEFIELD-TENTOTAL;
警报('two:'+result+'='+iAmountInDueField+'-'+TENTOTAL);
}
else if(iLineItemTotalHold
var-iLineItemTotalHold=0 您可能会发现
toFixed()
方法很有用
从该页:
var n = 12345.6789;
n.toFixed(); // Returns "12346": note rounding, no fractional part
n.toFixed(1); // Returns "12345.7": note rounding
n.toFixed(6); // Returns "12345.678900": note added zeros
另请参见。您可能会发现
toFixed()
方法很有用
从该页:
var n = 12345.6789;
n.toFixed(); // Returns "12346": note rounding, no fractional part
n.toFixed(1); // Returns "12345.7": note rounding
n.toFixed(6); // Returns "12345.678900": note added zeros
另见