小编Ken*_*son的帖子

我无法让我的长列表选择器正常工作.当列表高于屏幕时,长列表选择器保持静态,我无法滚动查看所有项目.

有什么想法吗？

<phone:PivotItem Header="{Binding Path=LocalizedResources.ApplicationsHeader, Source={StaticResource LocalizedStrings}}" x:Name="applicationsPivotItem">
    <Grid x:Name="applications" Grid.Row="1">
        <phone:LongListSelector x:Name="MainLongListSelector" ItemsSource="{Binding Items}" SelectionChanged="MainLongListSelector_SelectionChanged">
            <phone:LongListSelector.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding LineOne}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
                        <TextBlock Text="{Binding LineTwo}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>
                    </StackPanel>
                </DataTemplate>
            </phone:LongListSelector.ItemTemplate>
        </phone:LongListSelector>
    </Grid>
</phone:PivotItem>

我有以下对象:

var object = {
    "property1": "value1",
    "property2": "value2",
    "subobject": {
        "property1": "value1",
        "property2": "value2",
        "subobject": {
            "property1": "value1",
            "property2": "value2",
            "subobject": {...
            }
        }
    }
}

我试图设置一个嵌套的子对象属性,但嵌套级别是动态的.

如何在不执行以下操作的情况下动态设置其中一个嵌套属性:object.subobject.subobject = { ... }？

编辑: 所以更具体一点,我试图设置一个嵌套的子对象,但我不会每次都知道哪一个.

我一直在墙上撞了好几个小时......看了很多页面,我觉得我的脚本是正确的,但是我的收藏品并没有触发add事件加上:true传入获取方法.我可以绑定到重置事件,但add事件不会触发..

模型:

test.Models.AppBlock = Backbone.Model.extend({
    defaults: {
        AppID:          null,
        AppName:        null,
        AppDescription: null
    },
    idAttribute: "AppID"
});

采集:

test.Collections.AppBlock = Backbone.Collection.extend({
    model:       test.Models.AppBlock,
    url:         ApiPath + "apps/byuser",

    Loading: false,

    initialize: function () {

    },

    getAppBlocks: function () {
        if (!this.Loading) {
            this.Loading = true;
            this.fetch({
                data: JSON.stringify({
                          Token: test.Session.Token
                      }),
                add:         true,  // OMG WTF ?!?!
                type:        'POST',
                dataType:    'json',
                contentType: 'application/json',
                cache:       false,
                success:     this.getAppBlocksSuccess,
                error:       this.getAppBlocksError
            });
        }
    },

    parse: function (response) {
        return response.Data;
    },

    getAppBlocksSuccess: function …

我试图找出一个原因,为什么这个循环是如此缓慢,但我还没有得到一个很好的答案.以下循环需要一分钟才能执行:

        string answer = "";
        string headers = "";
        string datarows = "";
        bool firstRun = true;
        foreach (Dictionary<string, string> row in JSON)
        {
            datarows += "<tr>";
            foreach (KeyValuePair<String, String> cell in row)
            {
                if (firstRun) { headers += "<th>" + cell.Key + "</th>"; }
                datarows += "<td>" + cell.Value + "</td>";
            }
            datarows += "</tr>";
            firstRun = false;
        }
        answer += "<table><tr>" + headers + "</tr>" + datarows + "</table>";
        return answer;

JSON变量是一个List,包含大约1150个词典.每个字典包含9个键值对.有什么想法吗？