Question

<div data-bind="foreach : list1">
    <div data-bind="foreach : Land">
        <div data-bind="text : Description">
        </div>
    </div>
</div>

var ViewModel = function() {
var self = this;
var _json =[
    {
        "Land": {
            "Description": "BBA-Reman",
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        },
        "Zoning": {
            "Description": "VA Zoning",
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        },
        "Insurence": {
            "CompanyName": "Geico",
            "Address": null,
            "Phone": null,
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        }

    },
    {
        "Land": {
            "Description": "Star Mind",
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        },
        "Zoning": {
            "Description": "VA Zoning",
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        },
        "Insurence": {
            "CompanyName": "Geico",
            "Address": null,
            "Phone": null,
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        }
    }
]
self.list1 = ko.observableArray(_json);

}

ko.applyBindings(new ViewModel());

为什么我的嵌套foreach不起作用？

我用这种方式绑定的那一刻然后它正在工作

<div data-bind="foreach : list1">
    <div data-bind="with: Land">
        <div data-bind="text : Description">
        </div>
    </div>
</div>

这是我的jsfiddle http://jsfiddle.net/tridip/kxumu4rs/2/

Answer 1

您的JSON数据的存储方式不会支持嵌套的foreach迭代。 Land是Object，不是数组。

如果要迭代Land，则需要是一个数组。例如：

http://jsfiddle.net/kxumu4rs/4/

<div data-bind="foreach : list1">
    <div data-bind="foreach: Land">
        <div data-bind="text : Description">
        </div>
    </div>
</div>

var ViewModel = function() {
var self = this;
var _json =[
    {
        "Land": [
            {
                "Description": "BBA-Reman",
                "ID": 1,
                "CreateDate": null,
                "CreatedBy": null,
                "UpdateDate": null,
                "UpdatedBy": null
            },
            {
                "Description": "BBA-Reman 2",
                "ID": 2,
                "CreateDate": null,
                "CreatedBy": null,
                "UpdateDate": null,
                "UpdatedBy": null
            }
        ],
        "Zoning": {
            "Description": "VA Zoning",
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        },
        "Insurence": {
            "CompanyName": "Geico",
            "Address": null,
            "Phone": null,
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        }

    },
    {
        "Land": [
            {
                "Description": "Star Mind",
                "ID": 1,
                "CreateDate": null,
                "CreatedBy": null,
                "UpdateDate": null,
                "UpdatedBy": null
            },
            {
                "Description": "Star Mind 2",
                "ID": 2,
                "CreateDate": null,
                "CreatedBy": null,
                "UpdateDate": null,
                "UpdatedBy": null
            }
        ],
        "Zoning": {
            "Description": "VA Zoning",
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        },
        "Insurence": {
            "CompanyName": "Geico",
            "Address": null,
            "Phone": null,
            "ID": 1,
            "CreateDate": null,
            "CreatedBy": null,
            "UpdateDate": null,
            "UpdatedBy": null
        }
    }
]
self.list1 = ko.observableArray(_json);

}

ko.applyBindings(new ViewModel());

BBA-Reman
BBA-Reman 2
Star Mind
Star Mind 2

如果您的Land数据不是真正的数据数组，您应该保持原样并使用已发布的with：

<div data-bind="foreach : list1">
    <div data-bind="with: Land">
        <div data-bind="text : Description">
        </div>
    </div>
</div>

嵌套的foreach用法在knockout js中不起作用

1 个答案: