我是新的bie on knockout js.i创建一个crud操作一个页面应用程序，在其中你点击添加字段一个表单出现你添加数据并点击添加按钮它添加数据，如果你点击保存按钮它以json格式显示数据，但当我点击我的保存按钮时，我只想保存当时形式的数据而不是整个数据。我能够在点击删除时执行此功能但不知道如何执行点击保存这里是整个结构
<html>
<head>
<script type="text/javascript" src="jquery.min.js"></script>
<script type="text/javascript" src="knockout-3.1.0.js"></script>
</head>
<body>
<table style="width:100%;" data-bind="visible:showFields">
<tbody>
<tr>
<th style="width:100px;">Branch </th>
<th style="width:100px;">Enter Value</th>
</tr>
</tbody>
<tr>
<td>Branch ID (int):</td>
<td>
<input data-bind="value: BranchId" />
</td> <!--,valueUpdate:'keypress'-->
</tr>
<tr>
<td>Name :</td>
<td>
<input data-bind="value: Name" /></td>
</tr>
<tr>
<td>Description :</td>
<td>
<input data-bind="value: Description" /></td>
</tr>
<tr>
<td>Template :</td>
<td>
<select data-bind="options: Templates, value:
Template, optionsCaption: 'Select Template...'"></select></td>
</tr>
<tr>
<td>MetaKeyword :</td>
<td>
<input data-bind="value: MetaKeyword" /></td>
</tr>
<tr>
<td>MetaDescription :</td>
<td>
<input data-bind="value: MetaDescription" /></td>
</tr>
<tr>
<td>MetaTitle :</td>
<td>
<input data-bind="value: MetaTitle" /></td>
</tr>
<tr>
<td>EnableSearch :</td>
<td>
<select data-bind="options: EnableSearchs, value:
EnableSearch, optionsCaption: 'Select Search...'"></select>
</td>
</tr>
<tr>
<td colspan="3">
<button type="button" data-bind="click:
AddBranch">Add Branch</button>
<button type="button" data-bind="click:
SaveBranch">Save Branch</button>
</td>
</tr>
</table>
</div>
<div style="width:70%;float:left;display:inline-block;" data-bind="visible:show">
<h2>List of Branches</h2>
<table style="width:100%;" data-bind="visible: Branches().length > 0" border="0">
<tr>
<th>Branch Id</th>
<th>First Name</th>
<th>Last Name</th>
<th>Template</th>
<th>MetaKeyword</th>
<th>MetaDescription</th>
<th>MetaTitle</th>
<th>EnableSearch</th>
</tr>
<tbody data-bind="foreach: Branches">
<tr>
<td><span data-bind="text: BranchId" /></td>
<td>
<span data-bind="text: Name" /></td>
<td>
<span data-bind="text: Description" /></td>
<td>
<select data-bind="options: $root.Templates,
value: Template"></select></td>
<td>
<span data-bind="text: MetaKeyword" /></td>
<td>
<span data-bind="text: MetaDescription" /></td>
<td>
<span data-bind="text: MetaTitle" />
</td>
<td>
<select data-bind="options: $root.EnableSearchs,
value: EnableSearch"></select>
</td>
<td><a href="#" data-bind="click: $root.
DeleteBranch">Delete</a></td>
<td><a href="#" data-bind="click:$root.edit">edit</a></td>
</tr>
</tbody>
</table>
<a href="#" data-bind="click:AddField">AddFields</a>
</div>
</body>
<script>
function Branch(data) {
this.BranchId = ko.observable(data.BranchId);
this.Name = ko.observable(data.Name);
this.Description = ko.observable(data.Description);
this.Template = ko.observable(data.Template);
this.MetaKeyword = ko.observable(data.MetaKeyword);
this.MetaDescription = ko.observable(data.MetaDescription);
this.MetaTitle = ko.observable(data.MetaTitle);
this.EnableSearch = ko.observable(data.EnableSearch);
}
function BranchViewModel() {
var self = this;
self.EnableSearchs = ko.observableArray(['Yes', 'No']);
self.Templates = ko.observableArray(['Template1', 'Template2']);
self.Branches = ko.observableArray([]);
self.BranchId = ko.observable();
self.Name = ko.observable();
self.Description = ko.observable();
self.MetaKeyword = ko.observable();
self.MetaDescription = ko.observable();
self.MetaTitle = ko.observable();
self.EnableSearch = ko.observable();
self.Template = ko.observable();
self.editBranch = ko.observable();
self.show = ko.observable(true);
self.showFields = ko.observable(false);
self.flag = ko.observable(false);
self.AddBranch = function () {
if (self.flag()) {
self.editBranch().BranchId(self.BranchId())
self.editBranch().Name(self.Name())
self.editBranch().Description(self.Description())
self.editBranch().EnableSearch(self.EnableSearch())
self.editBranch().MetaKeyword(self.MetaKeyword())
self.editBranch().MetaDescription(self.MetaDescription())
self.editBranch().MetaTitle(self.MetaTitle())
self.editBranch().Template(self.Template())
self.flag(false);
self.show(true);
self.showFields(false);
self.BranchId(""),
self.Name(""),
self.Description(""),
self.EnableSearch(""),
self.MetaKeyword(""),
self.MetaDescription(""),
self.MetaTitle(""),
self.Template("")
}
else{
self.Branches.push(new Branch({
BranchId: self.BranchId(),
Name: self.Name(),
Description: self.Description(),
EnableSearch: self.EnableSearch(),
MetaKeyword: self.MetaKeyword(),
MetaDescription: self.MetaDescription(),
MetaTitle: self.MetaTitle(),
Template: self.Template()
}));
self.BranchId(""),
self.Name(""),
self.Description(""),
self.EnableSearch(""),
self.MetaKeyword(""),
self.MetaDescription(""),
self.MetaTitle(""),
self.Template("")
self.show(true);
self.showFields(false);
}
};
self.AddField = function(){
self.show(false);
self.showFields(true);
}
self.DeleteBranch = function (branch) {
alert(ko.toJSON({ data: branch }));
};
self.edit = function (branch) {
self.editBranch(branch);
self.show(false);
self.showFields(true);
self.BranchId(branch.BranchId());
self.Name(branch.Name());
self.Description(branch.Description());
self.EnableSearch(branch.EnableSearch());
self.MetaKeyword(branch.MetaKeyword());
self.MetaDescription(branch.MetaDescription());
self.MetaTitle(branch.MetaTitle());
self.Template(branch.Template());
self.flag(true);
}
self.SaveBranch = function (branch) {
alert(ko.toJSON( self.Branches));
};
}
$(document).ready(function () {
ko.applyBindings(new BranchViewModel());
});
</script>
</html>
其次我想在我的页面加载时在我的页面上显示一些json数据。这是我的json数据。
[{"BranchId":"1","Name":"us","Description":"united states","Template":"Template1","MetaKeyword":"us","MetaDescription":"us","MetaTitle":"us","EnableSearch":"Yes"},{"BranchId":"2","Name":"europe","Description":"europe","Template":"Template1","MetaKeyword":"euro","MetaDescription":"euro","MetaTitle":"euro","EnableSearch":"Yes"},{"BranchId":"3","Name":"aus","Description":"aus","Template":"Template1","MetaKeyword":"aus","MetaDescription":"aus","MetaTitle":"aus","EnableSearch":"Yes"}]
答案 0 :(得分：2)
这里是你怎么做的..你需要将每个对象从json转换为Branch。你可以使用computed来实现。
为JSON数据集创建新的var
var dummyData = [{"BranchId":"1","Name":"us","Description":"united states","Template":"Template1","MetaKeyword":"us","MetaDescription":"us","MetaTitle":"us","EnableSearch":"Yes"},{"BranchId":"2","Name":"europe","Description":"europe","Template":"Template1","MetaKeyword":"euro","MetaDescription":"euro","MetaTitle":"euro","EnableSearch":"Yes"},{"BranchId":"3","Name":"aus","Description":"aus","Template":"Template1","MetaKeyword":"aus","MetaDescription":"aus","MetaTitle":"aus","EnableSearch":"Yes"}];
self.PopulateBranches = ko.computed(function(){
ko.utils.arrayForEach(dummyData, function(item){
self.Branches.push(new Branch(item));
});
});
此处为您更新了JSFiddle：http://jsfiddle.net/x2ubuy44/