通过 KnockoutJS 实现动态创建、读取、更新、删除
与其他专家的问题延续的一部分（动态列和行与 knockoutjs）
<script type="text/javascript">
var columnDefs = [{
"$id": "1",
"ColumnName": "Id",
"system_type_id": 56,
"primaryCol": 1
}, {
"$id": "2",
"ColumnName": "Inv_Id",
"system_type_id": 231,
"primaryCol": 0
}, {
"$id": "3",
"ColumnName": "ACX_No",
"system_type_id": 175,
"primaryCol": 0
}, {
"$id": "4",
"ColumnName": "ACX_Name",
"system_type_id": 175,
"primaryCol": 0
}, {
"$id": "5",
"ColumnName": "S_No",
"system_type_id": 175,
"primaryCol": 0
}, {
"$id": "27",
"ColumnName": "Acc_Class",
"system_type_id": 231,
"primaryCol": 0
}, {
"$id": "28",
"ColumnName": "Direction",
"system_type_id": 231,
"primaryCol": 0
}];
var rowDefs = [{
"$id": "1",
"Id": 1,
"Inv_Id": "PV0001-1",
"ACX_No": "6",
"ACX_Name": "ABC",
"S_No": "5",
"Acc_Class": "Local",
"Direction": "Two-Way"
}, {
"$id": "2",
"Id": 2,
"Inv_Id": "PV0002-1",
"ACX_No": "3",
"ACX_Name": "CKD",
"S_No": "6",
"Acc_Class": "Local",
"Direction": "Two-Way"
}];
function HeaderViewModel(data, parent) {
var self = this,
nbsp = String.fromCharCode(160);
// observables
ko.mapping.fromJS(data, {}, self);
//self.isVisible = ko.observable(true);
// computeds
self.isVisible = ko.computed(function () {
//console.log('data.ColumnName.indexOf(\'SYS\'):', data.ColumnName.indexOf('SYS'));
return data.ColumnName.indexOf('SYS') >= 0 ? false : true;
});
self.HeaderName = ko.computed(function () {
return data.ColumnName.replace('_', nbsp);
});
self.SystemField = ko.computed(function () {
return data.ColumnName.indexOf('SYS');
});
self.Visible = ko.computed(function () {
//console.log('data.ColumnName.indexOf(\'SYS\'):', data.ColumnName.indexOf('SYS'));
return data.ColumnName.indexOf('SYS') >= 0 ? false : true;
});
}
// ---------------------------------------------------------------------------
function RowViewModel(data, parent) {
var self = this,
nbsp = String.fromCharCode(160);
// observables
ko.mapping.fromJS(data, {}, self);
// computeds
self.HrefDetailsPage = ko.computed(function () {
return parent.invtype + '/' + data.Id;
});
self.selectedItem = ko.observable();
self.setSelectedItem = function () {
console.dir(this);
self.selectedItem(this);
};
self.getDetails = function (details) {
self.selectedItem(details);
//console.dir(self.selectedItem);
return details; // self.selectedItem();
}
}
// ---------------------------------------------------------------------------
function ViewModel() {
var self = this;
// raw values
self.invtype = "@ViewBag.invtype"; //"Pavement";
// observables
self.columns = ko.observableArray();
self.rows = ko.observableArray();
// computeds
self.visibleColumns = ko.computed(function () {
return ko.utils.arrayFilter(self.columns(), function (column) {
return column.isVisible;
});
});
// methods
self.load = function () {
$.when(
// use two plain $.get() calls to your API resources here
// the $.post() is required only for the mock-up in jsFiddle
$.post("/echo/json/", {
json: JSON.stringify(columnDefs)
}),
$.post("/echo/json/", {
json: JSON.stringify(rowDefs)
}))
.then(function (columnResponse, rowResponse) {
var columnDefs = columnResponse[0],
rowDefs = rowResponse[0],
columnMapping = {
key: function (data) {
return ko.utils.unwrapObservable(data.ColumnName);
},
create: function (options) {
return new HeaderViewModel(options.data, self);
}
},
rowMapping = {
key: function (data) {
return ko.utils.unwrapObservable(data.Id);
},
create: function (options) {
return new RowViewModel(options.data, self);
}
};
ko.mapping.fromJS(columnDefs, columnMapping, self.columns);
ko.mapping.fromJS(rowDefs, rowMapping, self.rows);
});
return self;
};
}
// ---------------------------------------------------------------------------
ko.applyBindings(new ViewModel().load());
</script>
//HTML - 用户界面
<div class="details" data-bind="visible:rows.selectedItem">
<div data-bind="with: rows.selectedItem">
details data.......
<pre data-bind="text: JSON.stringify(ko.toJSON($data))"></pre>
<input data-bind="value:Id" />
<!-- TODO dynamicly output label and data from the viewmodel -->
<b>ID:</b> <span data-bind="text: Id"></span>
<b>ACX Name:</b> <span data-bind="text:ACX_Name"></span>
<b>Inv ID:</b> <span data-bind="text:ACX_Name"></span>
</div>
</div>
<div data-bind="visible: rows.selectedItem == null">
No selection was made
</div>
<div id="listPlaceholder">
<table>
<thead>
<tr>
<th>Link</th>
<!-- ko foreach: $root.visibleColumns -->
<th data-bind="text: HeaderName, visible: Visible"></th>
<!-- /ko -->
</tr>
</thead>
<tbody data-bind="foreach: $root.rows">
<tr data-bind="click: $data.setSelectedItem">
<td><a href="" data-bind="attr: {href: HrefDetailsPage}">Details</a></td>
<!-- ko foreach: $root.visibleColumns -->
<td data-bind="text: $parent[ColumnName()], visible: Visible"></td>
<!-- /ko -->
</tr>
</tbody>
</table>
</div>
使用上面的代码，我在 self.setSelectedItem = function () { console.dir(this); self.selectedItem(this); };
我想在该部分详细输出这些数据