Question

感到沉沦。我是KnockoutJS的新手我不想做学生的桌子。可以在表格中添加或删除新学生这是功能

function Friend(a, b){
}

将观察学生的详细信息。 applyBinding的另一个功能

function functionViewModel()

如果它将被删除，那么代码工作正常，但使用此功能代码将不起作用

this.deleteRow=function(){
fn.friends.remove(this);
};

如何将“fn”变量从函数“functionViewModel”调用到函数“Friend” 建议我，如果有任何更好的主意。

<table border="1">
    <thead>
        <th>Full Name</th>
        <th>Address</th>
        <th>Graduate ?</th>
        <th>Subject</th>
        <th>Remove User</th>
    </thead>
    <tbody   data-bind="foreach:friends">
        <tr>
        <td data-bind="text:fullName"></td>
        <td data-bind="text:address"></td>
        <td><input type ="checkbox" data-bind="checked:graduate"></input></td>
        <td><input type ="text" data-bind="value:subjects, visible:graduate"></input></td>
        <td><input type= "button" data-bind="click:deleteRow" value="X"></input></td>
        </tr>
    </tbody>
</table>
<button data-bind="click:addUser">Add User</button>
<script src="D:\KnockoutJS\knockout-3.2.0.js"></script>
<script>

    function Friend(a, b){  
        this.fullName=a;
        this.address=b;
        this.graduate=ko.observable(false);
        this.subjects=ko.observable('');

        //Remove Row from Table
        this.deleteRow=function(){
        fn.friends.remove(this);
        };
    }

    function functionViewModel(){
        var fn={friends:ko.observableArray([new Friend("Sofia Smith", "London"), new Friend("Liam Taylor","New York")])};
        fn.addUser=function(){fn.friends.push(new Friend("Thomas Miller", "California"));};
        return fn;
        };
    ko.applyBindings(functionViewModel());
</script>

Answer 1

我认为你必须做以下任何一件事。

将removeuser函数移动到主视图模型并根据索引删除。如果你想这样做那么

http://jsfiddle.net/chLa93du/2/

在Html（查看）

<table border="1">
    <thead>
        <th>Full Name</th>
        <th>Address</th>
        <th>Graduate ?</th>
        <th>Subject</th>
        <th>Remove User</th>
    </thead>
    <tbody   data-bind="foreach:friends">
        <tr>
        <td data-bind="text:fullName"></td>
        <td data-bind="text:address"></td>
        <td><input type ="checkbox" data-bind="checked:graduate"></input></td>
        <td><input type ="text" data-bind="value:subjects, visible:graduate"></input></td>
        <td><input type= "button" data-bind="click:$parent.removeUser" value="X"></input></td>
        </tr>
    </tbody>
</table>
<button data-bind="click:addUser">Add User</button>

你的剧本：

    function Friend(a, b){  
        this.fullName=a;
        this.address=b;
        this.graduate=ko.observable(false);
        this.subjects=ko.observable('');
    }

    function functionViewModel(){
        var fn={friends:ko.observableArray([new Friend("Sofia Smith", "London"), new Friend("Liam Taylor","New York")])};
        fn.addUser=function(){fn.friends.push(new Friend("Thomas Miller", "California"));};
        fn.removeUser = function(item){
              fn.friends.remove(item);
        };
        return fn;
        };
    ko.applyBindings(functionViewModel());

您可以将主视图模型存储在全局变量中，然后进行访问。 http://jsfiddle.net/chLa93du/

 var viewModel;

function Friend(a, b){  
this.fullName=a;
this.address=b;
this.graduate=ko.observable(false);
this.subjects=ko.observable('');
this.deleteRow=function(){
    viewModel.friends.remove(this);
};
}

function functionViewModel(){
var fn={friends:ko.observableArray([new Friend("Sofia Smith", "London"), new Friend("Liam Taylor","New York")])};
fn.addUser=function(){fn.friends.push(new Friend("Thomas Miller", "California"));};
return fn;
};
viewModel = new functionViewModel();ko.applyBindings(viewModel);

在knockoutJS中使用按钮删除表格行

1 个答案: