html - 必应地图无法显示

Question

我想在我的项目（MVC3 和 Razor 引擎）上上传 Bing 地图。我有创建和编辑视图来处理晚餐以及显示 bing 地图。问题是只有编辑视图可以显示地图，而创建视图不能。但是这两个视图都呈现相同的局部视图，称为“DinnerForm”。我想知道为什么会导致这个问题。

创建视图

@model NerdDinner.Models.DinnerFormViewModel

@{
    ViewBag.Title = "Create";
}

<h2>Host a dinner</h2>

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

@{Html.RenderPartial("DinnerForm");}

编辑视图

@model NerdDinner.Models.DinnerFormViewModel


    ViewBag.Title = @Html.Encode(Model.Dinner.Title);

<h2>Edit</h2>

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

@{Html.RenderPartial("DinnerForm");}

DinnerForm 视图

@model NerdDinner.Models.DinnerFormViewModel

@using (Html.BeginForm()) {
    @Html.ValidationSummary(true)
    <fieldset>
        <div class="editor-label">
            @Html.LabelFor(model => model.Dinner.Title)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Dinner.Title)
            @Html.ValidationMessageFor(model => model.Dinner.Title)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Dinner.Latitude)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Dinner.Latitude)
            @Html.ValidationMessageFor(model => model.Dinner.Latitude)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Dinner.Longitude)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Dinner.Longitude)
            @Html.ValidationMessageFor(model => model.Dinner.Longitude)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Dinner.EventDate)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Dinner.EventDate)
            @Html.ValidationMessageFor(model => model.Dinner.EventDate)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Dinner.ContactPhone)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Dinner.ContactPhone)
            @Html.ValidationMessageFor(model => model.Dinner.ContactPhone)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Dinner.Address)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Dinner.Address)
            @Html.ValidationMessageFor(model => model.Dinner.Address)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Dinner.Country)
        </div>
        <div class="editor-field">
            @Html.DropDownList("Country", @Model.Countries)
            @Html.ValidationMessageFor(model => model.Countries)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Dinner.HostedBy)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Dinner.HostedBy)
            @Html.ValidationMessageFor(model => model.Dinner.HostedBy)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Dinner.Description)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Dinner.Description)
            @Html.ValidationMessageFor(model => model.Dinner.Description)
        </div>

        <p>
            <input type="submit" value="Save" />
        </p>    
        <div id="mapDiv">    
            @{Html.RenderPartial("Map", Model.Dinner);}
        </div>

    </fieldset>

    <script type="text/javascript">

        $(document).ready(function () {
            $("#Address").blur(function (evt) {
                $("#Latitude").val("");
                $("#Longitude").val("");

                var address = jQuery.trim($("#Address").val());
                if (address.length < 1)
                    return;

                FindAddressOnMap(address);
            });
        });
        </script>
}

地图视图很好，因为它出现在编辑页面上。

我有一个名为 NerdDinner 的 js 文件来访问地图功能。FindAddressOnMap() 函数在那里定义。

function NerdDinner() { }

NerdDinner.MapDivId = 'theMap';
NerdDinner._map = null;
NerdDinner._points = [];
NerdDinner._shapes = [];

NerdDinner.LoadMap = function (latitude, longitude, onMapLoaded) {
    NerdDinner._map = new VEMap(NerdDinner.MapDivId);

    var options = new VEMapOptions();

    options.EnableBirdseye = false

    // Makes the control bar less obtrusize.
    this._map.SetDashboardSize(VEDashboardSize.Small);

    if (onMapLoaded != null)
        NerdDinner._map.onLoadMap = onMapLoaded;

    if (latitude != null && longitude != null) {
        var center = new VELatLong(latitude, longitude);
    }

    NerdDinner._map.LoadMap(center, null, null, null, null, null, null, options);
}

NerdDinner.ClearMap = function () {
    NerdDinner._map.Clear();
    NerdDinner._points = [];
    NerdDinner._shapes = [];
}

NerdDinner.LoadPin = function (LL, name, description) {
    var shape = new VEShape(VEShapeType.Pushpin, LL);

    //Make a nice Pushpin shape with a title and description
    shape.SetTitle("<span class=\"pinTitle\"> " + escape(name) + "</span>");

    if (description !== undefined) {
        shape.SetDescription("<p class=\"pinDetails\">" + escape(description) + "</p>");
    }

    NerdDinner._map.AddShape(shape);
    NerdDinner._points.push(LL);
    NerdDinner._shapes.push(shape);
}

NerdDinner.FindAddressOnMap = function (where) {
    var numberOfResults = 1;
    var setBestMapView = true;
    var showResults = true;
    var defaultDisambiguation = true;

    NerdDinner._map.Find("", where, null, null, null,
                         numberOfResults, showResults, true, defaultDisambiguation,
                         setBestMapView, NerdDinner._callbackForLocation);
}

NerdDinner._callbackForLocation = function (layer, resultsArray, places, hasMore, VEErrorMessage) {
    NerdDinner.ClearMap();

    if (places == null) {
        NerdDinner._map.ShowMessage(VEErrorMessage);
        return;
    }

    //Make a pushpin for each place we find
    $.each(places, function (i, item) {
        var description = "";
        if (item.Description !== undefined) {
            description = item.Description;
        }
        var LL = new VELatLong(item.LatLong.Latitude,
                        item.LatLong.Longitude);

        NerdDinner.LoadPin(LL, item.Name, description);
    });

    //Make sure all pushpins are visible
    if (NerdDinner._points.length > 1) {
        NerdDinner._map.SetMapView(NerdDinner._points);
    }

    //If we've found exactly one place, that's our address.
    //lat/long precision was getting lost here with toLocaleString, changed to toString
    if (NerdDinner._points.length === 1) {
        $("#Latitude").val(NerdDinner._points[0].Latitude.toString());
        $("#Longitude").val(NerdDinner._points[0].Longitude.toString());
    }
}

NerdDinner.FindDinnersGivenLocation = function (where) {
    NerdDinner._map.Find("", where, null, null, null, null, null, false,
                         null, null, NerdDinner._callbackUpdateMapDinners);
}


NerdDinner.FindMostPopularDinners = function (limit) {
    $.post("/Search/GetMostPopularDinners", { "limit": limit }, NerdDinner._renderDinners, "json");
}

NerdDinner._callbackUpdateMapDinners = function (layer, resultsArray, places, hasMore, VEErrorMessage) {
    var center = NerdDinner._map.GetCenter();

    $.post("/Search/SearchByLocation",
           { latitude: center.Latitude, longitude: center.Longitude },
           NerdDinner._renderDinners,
           "json");
}


NerdDinner._renderDinners = function (dinners) {
    $("#dinnerList").empty();

    NerdDinner.ClearMap();

    $.each(dinners, function (i, dinner) {

        var LL = new VELatLong(dinner.Latitude, dinner.Longitude, 0, null);

        // Add Pin to Map
        NerdDinner.LoadPin(LL, _getDinnerLinkHTML(dinner), _getDinnerDescriptionHTML(dinner));

        //Add a dinner to the <ul> dinnerList on the right
        $('#dinnerList').append($('<li/>')
                        .attr("class", "dinnerItem")
                        .append(_getDinnerLinkHTML(dinner))
                        .append($('<br/>'))
                        .append(_getDinnerDate(dinner, "mmm d"))
                        .append(" with " + _getRSVPMessage(dinner.RSVPCount)));
    });

    // Adjust zoom to display all the pins we just added.
    if (NerdDinner._points.length > 1) {
        NerdDinner._map.SetMapView(NerdDinner._points);
    }

    // Display the event's pin-bubble on hover.
    $(".dinnerItem").each(function (i, dinner) {
        $(dinner).hover(
            function () { NerdDinner._map.ShowInfoBox(NerdDinner._shapes[i]); },
            function () { NerdDinner._map.HideInfoBox(NerdDinner._shapes[i]); }
        );
    });

    function _getDinnerDate(dinner, formatStr) {
        return '<strong>' + _dateDeserialize(dinner.EventDate).format(formatStr) + '</strong>';
    }

    function _getDinnerLinkHTML(dinner) {
        return '<a href="' + dinner.Url + '">' + dinner.Title + '</a>';
    }

    function _getDinnerDescriptionHTML(dinner) {
        return '<p>' + _getDinnerDate(dinner, "mmmm d, yyyy") + '</p><p>' + dinner.Description + '</p>' + _getRSVPMessage(dinner.RSVPCount);
    }

    function _dateDeserialize(dateStr) {
        return eval('new' + dateStr.replace(/\//g, ' '));
    }


    function _getRSVPMessage(RSVPCount) {
        var rsvpMessage = "" + RSVPCount + " RSVP";

        if (RSVPCount > 1)
            rsvpMessage += "s";

        return rsvpMessage;
    }
}

NerdDinner.dragShape = null;
NerdDinner.dragPixel = null;

NerdDinner.EnableMapMouseClickCallback = function () {
    NerdDinner._map.AttachEvent("onmousedown", NerdDinner.onMouseDown);
    NerdDinner._map.AttachEvent("onmouseup", NerdDinner.onMouseUp);
    NerdDinner._map.AttachEvent("onmousemove", NerdDinner.onMouseMove);
}

NerdDinner.onMouseDown = function (e) {
    if (e.elementID != null) {
        NerdDinner.dragShape = NerdDinner._map.GetShapeByID(e.elementID);
        return true;
    }
}

NerdDinner.onMouseUp = function (e) {
    if (NerdDinner.dragShape != null) {
        var x = e.mapX;
        var y = e.mapY;
        NerdDinner.dragPixel = new VEPixel(x, y);
        var LatLong = NerdDinner._map.PixelToLatLong(NerdDinner.dragPixel);
        $("#Latitude").val(LatLong.Latitude.toString());
        $("#Longitude").val(LatLong.Longitude.toString());
        NerdDinner.dragShape = null;

        NerdDinner._map.FindLocations(LatLong, NerdDinner.getLocationResults);
    }
}

NerdDinner.onMouseMove = function (e) {
    if (NerdDinner.dragShape != null) {
        var x = e.mapX;
        var y = e.mapY;
        NerdDinner.dragPixel = new VEPixel(x, y);
        var LatLong = NerdDinner._map.PixelToLatLong(NerdDinner.dragPixel);
        NerdDinner.dragShape.SetPoints(LatLong);
        return true;
    }
}

NerdDinner.getLocationResults = function (locations) {
    if (locations) {
        var currentAddress = $("#Dinner_Address").val();
        if (locations[0].Name != currentAddress) {
            var answer = confirm("Bing Maps returned the address '" + locations[0].Name + "' for the pin location. Click 'OK' to use this address for the event, or 'Cancel' to use the current address of '" + currentAddress + "'");
            if (answer) {
                $("#Dinner_Address").val(locations[0].Name);
            }
        }
    }
}