如何使用 ko.mapping - Knockout 更新 Javascript 对象中的属性

How to update a property in an Javascript Object with ko.mapping - Knockout?

本文关键字：对象 Javascript 属性 更新 Knockout 何使用 ko mapping      更新时间：2023-09-26

假设我们有以下对象：

var gridViewModelJs = 
    {"GridViewModel":{"Rows":[{"RowNumber":"1","Id":"6","Name":"FullNameOfUser","NumberOfUsers":"12","RegistrationDate":"10/15/2013"}],"FoundItems":"4","CurrentPage":1,"TotalPages":1,"ItemsPerPage":50,"PagingLinks":""}, 
    "EntityModel":{"Id":0,"PermissionIds":null,"Name":null,"NumberOfUsers":0,"PersianRegistrationDate":null,"RegistrationDate":"0001-01-01T00:00:00","Authorizations":null,"Users":null,"Contents":null}};
var KoEntityViewModel = ko.mapping.fromJS(gridViewModelJs);
ko.applyBindings(KoEntityViewModel);

上面的代码有效，为了更新KoEntityViewModel.，我使用以下代码：

// receivedData is data that returns from jQuery Ajax
// I'm dead sure `receivedData` is correct
var doneFunc = function (receivedData) {
    ko.mapping.fromJS(receivedData, KoEntityViewModel.EntityModel);
    showDetailsBlock();
};

但是KoEntityViewModel.EntityModel没有任何更新.请指导我如何更新上述示例中的KoEntityViewModel.EntityModel

在

应用绑定后更新映射时，请使用三个参数：

ko.mapping.fromJS(receivedData, {}, KoEntityViewModel);
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