javascript 在 jqGrid 中捕获下拉列表的更改/单击事件
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Capture change/click event of drop down in jqGrid
提问by Nick.McDermaid
The click event on my drop down does not fire. I do not see an alert and when I add a breakpoint in Firebug, it does not reach the breakpoint. It does reach the click and double click events if I breakpoint those.
我的下拉菜单上的点击事件不会触发。我没有看到警报，当我在 Firebug 中添加断点时，它没有到达断点。如果我断点它们，它确实会到达单击和双击事件。
Specifically, when I:
具体来说，当我：
- Double click to edit a line
- Pick the Customer Drop Down and pick something else
- Move to another line
- 双击编辑一行
- 选择客户下拉菜单并选择其他内容
- 移至另一行
then the line
然后线
alert("I changed");
Does not run.
不运行。
I wonder if it's because when I move to another line, the value gets reverted (even though I have commented out the 'restoreRow' method)
我想知道是不是因为当我移动到另一行时，该值会恢复（即使我已经注释掉了 'restoreRow' 方法）
Am I using the right event to capture when my drop down value changes (without having to change focus)
当我的下拉值更改时，我是否使用正确的事件来捕获（无需更改焦点）
Thanks for your assistance.
感谢你的协助。
$(document).ready(
function () {
// This is executed as soon as the DOM is loaded and before the page contents are loaded
var lastsel;
// $ is short for JQuery which is in turn a super overloaded function that does lots of things.
// # means select an element by its ID name, i.e. below we have <table id="ts"
$("#ts").jqGrid({
//=============
// Grid Setup
url: 'Timesheet/GridData/',
datatype: 'json',
mtype: 'GET',
pager: $('#pager'),
rowNum: 30,
rowList: [10, 20, 30, 40, 80],
viewrecords: true,
imgpath: '/Content/themes/base/images',
caption: 'Timesheet',
height: 450,
// Column definition
colNames: ['hCustomer_ID', 'hProject_ID', 'hTask_ID', 'Date', 'Customer', 'Project', 'Task', 'Description', 'Hours', '$'],
colModel: [
{ name: 'hCustomer_ID', index: 'hCustomer_ID', editable: false, hidden: true },
{ name: 'hProject_ID', index: 'hProject_ID', editable: false, hidden: true },
{ name: 'hTask_ID', index: 'hTask_ID', editable: false, hidden: true },
{ name: 'tsdate', index: 'tsdate', width: 80, editable: true, datefmt: 'yyyy-mm-dd' },
{ name: 'Customer', index: 'Customer', width: 250, align: 'left', editable: true, edittype: "select",
editoptions: { dataUrl: 'Timesheet/CustomerList' },
dataEvents: [
{
type: 'click',
fn: function (e) {
alert("I changed");
}
}]
},
{ name: 'Project', index: 'Project', width: 250, align: 'left', editable: true, edittype: "select", editoptions: { dataUrl: 'Timesheet/ProjectList'} },
{ name: 'Task', index: 'Task', width: 250, align: 'left', editable: true, edittype: "select", editoptions: { dataUrl: 'Timesheet/TaskList'} },
{ name: 'Desc', index: 'Desc', width: 300, align: 'left', editable: true },
{ name: 'Hours', index: 'Hours', width: 50, align: 'left', editable: true },
{ name: 'Charge', index: 'Charge', edittype: 'checkbox', width: 18, align: 'center', editoptions: { value: "0:1" }, formatter: "checkbox", formatoptions: { disabled: false }, editable: true }
],
//=============
// Grid Events
// when selecting, undo anything else
onSelectRow: function (rowid, iRow, iCol, e) {
if (rowid && rowid !== lastsel) {
// $(this).jqGrid('restoreRow', lastsel);
lastsel = rowid;
}
},
// double click to edit
ondblClickRow: function (rowid, iRow, iCol, e) {
// browser independent stuff
if (!e) e = window.event;
var element = e.target || e.srcElement
// When editing, change the drop down datasources to filter on the current parent
$(this).jqGrid('setColProp', 'Project', { editoptions: { dataUrl: 'Timesheet/ProjectList?Customer_ID=' + $(this).jqGrid('getCell', rowid, 'hCustomer_ID')} });
$(this).jqGrid('setColProp', 'Task', { editoptions: { dataUrl: 'Timesheet/TaskList?CustomerProject_ID=' + $(this).jqGrid('getCell', rowid, 'hProject_ID')} });
// Go into edit mode (automatically moves focus to first field)
// Use setTimout to apply the focus and datepicker after the first field gets the focus
$(this).jqGrid(
'editRow',
rowid,
{
keys: true,
oneditfunc: function (rowId) {
setTimeout(function () {
$("input, select", element).focus();
$("#" + rowId + "_tsdate").datepicker({ dateFormat: 'yy-mm-dd' });
}, 50);
}
}
);
}, // end ondblClickRow event handler
postData:
{
startDate: function () { return $('#startDate').val(); }
}
}); // END jQuery("#ts").jqGrid
$("#ts").jqGrid('navGrid', '#pager', { view: false, edit: false, add: false, del: false, search: false });
$("#ts").jqGrid('inlineNav', "#pager");
}); // END jQuery(document).ready(function () {
REVISED WORKING CODE:
修订后的工作代码：
$(document).ready(
function () {
// This is executed as soon as the DOM is loaded and before the page contents are loaded
var lastsel;
// $ is short for JQuery which is in turn a super overloaded function that does lots of things.
// # means select an element by its ID name, i.e. below we have <table id="ts"
$("#ts").jqGrid({
//=============
// Grid Setup
url: 'Timesheet/GridData/',
datatype: 'json',
mtype: 'GET',
pager: $('#pager'),
rowNum: 30,
rowList: [10, 20, 30, 40, 80],
viewrecords: true,
caption: 'Timesheet',
height: 450,
// Column definition
colNames: ['hCustomer_ID', 'hProject_ID', 'hTask_ID', 'Date', 'Customer', 'Project', 'Task', 'Description', 'Hours', '$'],
colModel: [
{ name: 'hCustomer_ID', index: 'hCustomer_ID', editable: false, hidden: true },
{ name: 'hProject_ID', index: 'hProject_ID', editable: false, hidden: true },
{ name: 'hTask_ID', index: 'hTask_ID', editable: false, hidden: true },
{ name: 'tsdate', index: 'tsdate', width: 80, editable: true, datefmt: 'yyyy-mm-dd' },
{ name: 'Customer', index: 'Customer', width: 250, align: 'left', editable: true, edittype: "select",
editoptions: {
dataUrl: 'Timesheet/CustomerList',
dataEvents: [
{
type: 'change',
fn: function (e) {
alert("I changed");
}
}]
}
},
{ name: 'Project', index: 'Project', width: 250, align: 'left', editable: true, edittype: "select", editoptions: { dataUrl: 'Timesheet/ProjectList'} },
{ name: 'Task', index: 'Task', width: 250, align: 'left', editable: true, edittype: "select", editoptions: { dataUrl: 'Timesheet/TaskList'} },
{ name: 'Desc', index: 'Desc', width: 300, align: 'left', editable: true },
{ name: 'Hours', index: 'Hours', width: 50, align: 'left', editable: true },
{ name: 'Charge', index: 'Charge', edittype: 'checkbox', width: 18, align: 'center', editoptions: { value: "0:1" }, formatter: "checkbox", formatoptions: { disabled: false }, editable: true }
],
//=============
// Grid Events
// when selecting, undo anything else
onSelectRow: function (rowid, iRow, iCol, e) {
if (rowid && rowid !== lastsel) {
// $(this).jqGrid('restoreRow', lastsel);
lastsel = rowid;
}
},
// double click to edit
ondblClickRow: function (rowid, iRow, iCol, e) {
// browser independent stuff
if (!e) e = window.event;
var element = e.target || e.srcElement
// When editing, change the drop down datasources to filter on the current parent
$(this).jqGrid('setColProp', 'Project', { editoptions: { dataUrl: 'Timesheet/ProjectList?Customer_ID=' + $(this).jqGrid('getCell', rowid, 'hCustomer_ID')} });
$(this).jqGrid('setColProp', 'Task', { editoptions: { dataUrl: 'Timesheet/TaskList?CustomerProject_ID=' + $(this).jqGrid('getCell', rowid, 'hProject_ID')} });
// Go into edit mode (automatically moves focus to first field)
// Use setTimout to apply the focus and datepicker after the first field gets the focus
$(this).jqGrid(
'editRow',
rowid,
{
keys: true,
oneditfunc: function (rowId) {
setTimeout(function () {
$("input, select", element).focus();
$("#" + rowId + "_tsdate").datepicker({ dateFormat: 'yy-mm-dd' });
}, 50);
}
}
);
}, // end ondblClickRow event handler
postData:
{
startDate: function () { return $('#startDate').val(); }
}
}); // END jQuery("#ts").jqGrid
$("#ts").jqGrid('navGrid', '#pager', { view: false, edit: false, add: false, del: false, search: false });
$("#ts").jqGrid('inlineNav', "#pager");
}); // END jQuery(document).ready(function () {
采纳答案by Oleg
Additionally it's unclear why you use bothinlineNavand manual call of editRowinside of ondblClickRow? If you would select row and then click on the button from the navigator the dataUrlwill not be adjusted.
此外，目前还不清楚您为什么同时使用inlineNav和editRow内部的手动调用ondblClickRow？如果您选择行，然后单击导航器中的按钮，dataUrl则不会进行调整。
The reason of the main problem which you describe is wrong usage of dataEvents. In the documentation of editoptionsyou will find the dataEventsis the property of editoptionslike dataUrlfor example. Currently you placed dataEventson the wrong place in colModel.
您描述的主要问题的原因是dataEvents. 例如，在editoptions的文档中，您会发现dataEvents是editoptionslike的属性dataUrl。目前你放在dataEvents了错误的地方colModel。
I would recommend you additionally to read the answerwhich describe how you can use dataUrlwhich parameters depend on the current selected row. Additionally I would recommend you to verify that you set Cache-Controlin the response of dataUrl(see the answer). Alternatively you can use anothe option described here.
我建议您另外阅读描述如何使用哪些参数取决于当前所选行的答案dataUrl。此外，我建议您验证您是否Cache-Control在响应中设置dataUrl（请参阅答案）。或者，您可以使用此处描述的另一个选项。
