小编use*_*794的帖子

我正在调试一个使用大量内存的javascript/html5网络应用程序.偶尔我会在控制台窗口中收到一条错误消息

"uncaught exception: out of memory".  

有没有办法让我在应用程序内优雅地处理这个错误？

最终我需要重新编写部分内容以防止这种情况发生.

现在我有谷歌地图代码,将在地图上设置一个标记.我想要的是将单个标记移动到用户点击的任何坐标.我只想在地图上使用1个标记,因此我需要将单个标记移动到点击的任何位置.任何帮助表示赞赏.谢谢!

    var initialLocation;
    var siberia = new google.maps.LatLng(60, 105);
    var newyork = new google.maps.LatLng(40.69847032728747, -73.9514422416687);
    var browserSupportFlag =  new Boolean();



    function initialize() {
        var myOptions = {
            zoom: 6,
            mapTypeId: google.maps.MapTypeId.HYBRID
        };
        var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

        myListener = google.maps.event.addListener(map, 'click', function(event) {
            placeMarker(event.latLng);
            google.maps.event.removeListener(myListener);
        });
        google.maps.event.addListener(map, 'drag', function(event) {
            placeMarker(event.latLng);
            google.maps.event.removeListener(myListener);
        });

        // Try W3C Geolocation (Preferred)
        if(navigator.geolocation) {
            browserSupportFlag = true;
            navigator.geolocation.getCurrentPosition(function(position) {
                initialLocation = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
                map.setCenter(initialLocation);
            }, function() {
                handleNoGeolocation(browserSupportFlag);
            });
            // Try Google Gears …

我编写了一个当前在Click事件上运行的jQuery函数.我需要更改它,以便在更改下拉框(Select- Option)值时运行它.这是我的代码:

<form id="form1" name="form1" method="post" action="">
  <label>
    <select name="otherCatches" id="otherCatches">
      <option value="*">All</option>
    </select>
  </label>
</form>

$("#otherCatches").click(function() {
    $.ajax({
        url: "otherCatchesMap.php>",
        success: function(msg) {
            $("#results").html(msg);
        }
    });
});

我正在尝试为我添加"名称"属性CheckBoxFor,但无法让它工作.

@Html.CheckBoxFor(
model => model.ProvidePracticalSuggestions, 
new { @name = "help_practicalSuggestions" 
                })

知道我在这里做错了什么吗？

呈现的HTML:

<div>
      <input data-val="true" data-val-required="The Provide practical suggestions for implementing change, e.g. step-by-step best practices field is required." id="ProvidePracticalSuggestions" name="ProvidePracticalSuggestions" type="checkbox" value="true" /><input name="ProvidePracticalSuggestions" type="hidden" value="false" />
       <span class="field-validation-valid" data-valmsg-for="ProvidePracticalSuggestions" data-valmsg-replace="true"></span>
       <label for="ProvidePracticalSuggestions">Provide practical suggestions for implementing change, e.g. step-by-step best practices</label>
</div>

我有一个字符串数组,我需要在Url.Action的查询字符串中传递.

Url.Action("Index", "Resource", new { FormatIds = Model.FormatIDs})

现在,链接在我的浏览器中显示为System.String []而不是查询字符串.是否有可能让MVC通过模型绑定自动执行此操作？

我需要它与我的控制器动作绑定,如:

public ActionResult Index(string[] formatIDs)

我有一个IEnumerable属性

public IEnumerable<string> ChangesOthersResult { get; set; }

我需要从ChangesOthersResult收集所有值并从视图发回到控制器.我如何遍历Ienumerable并创建将绑定回控制器中的ViewModel的隐藏字段？

foreach(var item in Model.ChangesOthersResult)
   {
       @Html.HiddenFor(x => x.ChangesOthersResult);
   }

给我Raw SQL语句作为文本.

我试图在调用play()方法的某个时间使用setPosition设置SoundCloud中样本的位置.我需要在样本开始播放之前设置它.现在这段代码不起作用:

SC.whenStreamingReady(function() {
            var sound = SC.stream("/tracks/141543551");
            sound.play();
            sound.setPosition(300);
        });

但是,当我在播放样本时调用setPosition时,它可以正常工作.

SC.whenStreamingReady(function() {
                setTimeout(function () {

                sound.pause();

                var positionCallback = function (eventPosition) {
                    this.clearOnPosition(0, positionCallback);
                    this.resume();
                };
                sound.onPosition(0, positionCallback);
                sound.setPosition(30000);


                sound.play();

 }, 5000);

    });

如何在播放样本之前使用setPosition()？

我正在尝试使用CSVhelper插件来读取上传的CSV文件.这是我的modelBinder类:

public class SurveyEmailListModelsModelBinder : DefaultModelBinder
{
    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        var csv = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
        var file = ((csv.RawValue as HttpPostedFileBase[]) ?? Enumerable.Empty<HttpPostedFileBase>()).FirstOrDefault();

        if (file == null || file.ContentLength < 1)
        {
            bindingContext.ModelState.AddModelError(
                "",
                "Please select a valid CSV file"
            );
            return null;
        }

        using (var reader = new StreamReader(file.InputStream))
        using (var csvReader = new CsvReader(reader))
        {
            return csvReader.GetRecords<SurveyEmailListModels>().ToArray();
        }
    }
}

这些是我想要映射到的对象:

public class SurveyEmailListModels
{
    [Key]
    [CsvField(Ignore = true)]
    public int SurveyEmailListId { get; …

在角度1我能够做类似的事情:

<script type="text/ng-template" id="commentView.html">
    <div>
        <div style="float: left; position: absolute;" ng-style="comment.displayPercent">
    </div>
</script>

<script type="text/ng-template" id="commentReplies.html">
    <div>
        <div class="commentChildBoxStyle" ng-hide="comment.hideComment">
            <div style="min-width: 250px;">

                <div ng-repeat="comment in comment.replies" ng-include="'commentReplies.html'"></div>
            </div>

        </div>
    </div>
</script>

我意识到我可以在Angular2中递归调用一个组件及其模板,但有没有办法只递归构建HTML？逻辑似乎更适合父组件而不是一系列子组件.

每次我尝试在我的dastabase中插入一个语句时,我得到一个"不正确的十进制值:'第一行''bounty3'的'NULL'错误.如何将空值插入十进制数据类型？我应该将默认值设为0.00吗？

Incorrect decimal value: '' for column 'bounty3' at row 1 Whole query: INSERT INTO songs (userid, wavURL, mp3URL, genre, songTitle, BPM, insWanted, bounty, insWanted2, bounty2, insWanted3, bounty3, insWanted4, bounty4, insWanted5, bounty5, insWanted6, bounty6, insWanted7, bounty7, insWanted8, bounty8, insWanted9, bounty9, insWanted10, bounty10) VALUES ('12534545', '/audio/wav/jqmrgpfcMichael/135259578210secreason.wav', '/audio/mp3/jqmrgpfcMichael/135259578210secreason.mp3', 'Rock/Funk', 'titlee', '120', 'bass', '20.00', 'guitar', '20.00', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '')

我也用NULL值尝试了这个语句.这是错误:

Incorrect decimal value: 'NULL' for column 'bounty3' at row 1 …