javascript – 如何在没有错误的情况下在bingmaps中推送2044个zipcodes表达式太长或太复杂而无法编译？

2023年4月10日 140次阅读

我试图在bingmaps中制作所有荷兰(4044)拉链码的多边形.每个邮政编码都有10到1000个坐标.我尝试了以下代码,它适用于大约200个zipcode：

var polygoncolor = new Microsoft.Maps.Color(100, 255, 0, 0);
var  pc1011 = new Array (
new Microsoft.Maps.Location(52.372203,4.913825),
new Microsoft.Maps.Location(52.375787,4.912745),
new Microsoft.Maps.Location(52.37605,4.911752));         
var polygon1011 = new Microsoft.Maps.Polygon(pc1011  , {
            fillColor: polygoncolor,
            strokeColor: polygoncolor
        });
map.entities.push(polygon1011);

我也尝试过这个,这是我喜欢看到的：

var myMappings = [
{  pc: "1011", coor: new Array(
     new Microsoft.Maps.Location(52.365669,4.901578),
     new Microsoft.Maps.Location(52.372203,4.913825),
     new Microsoft.Maps.Location(52.378387,4.905391)
)},
  {     
    pc: "1012", coor: new Array(
    new Microsoft.Maps.Location(52.381136,4.89783),
    new Microsoft.Maps.Location(52.372203,4.913825),
    new Microsoft.Maps.Location(52.382393,4.900011)
)}];

for (var i = 0; i < myMappings.length; i += 1) {
     var polygoncolor = new Microsoft.Maps.Color(100, 0, 0, 100);
     var polygon = new Microsoft.Maps.Polygon(myMappings[i].coor, {
       fillColor: polygoncolor,
       strokeColor: polygoncolor
     });
     map.entities.push(polygon);

}

两者都使用有限的zipcodes.但是当我试图用~200坐标推出更多~300个邮政编码/多边形时,它会返回下面的错误.我正在使用带有bingmaps的visual studio .net.有谁知道如何解决这个错误？或者可能是另一个显示所有荷兰拉链码的解决方案？
‘/’应用程序中的服务器错误.

Compilation Error Description: An error occurred during the compilation of a resource
required to service this request. Please review the following specific
error details and modify your source code appropriately.

Compiler Error Message: CS1647: An expression is too long or complex
to compile

Source Error:

[No relevant source lines]

Source File: Line: 0

Show Detailed Compiler Output:

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“C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET
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Microsoft (R) Visual C# Compiler version 4.0.30319.18408

for Microsoft (R) .NET Framework 4.5 Copyright (C) Microsoft
Corporation. All rights reserved.

fatal error CS1647: An expression is too long or complex to compile

最佳答案 之前没见过那个错误.看起来像ASP.NET中的东西.在任何情况下,尝试渲染4044邮政编码多边形,每个200坐标都不起作用.这只是JavaScript要处理的太多数据.这将创建大量的DOM对象,并且每次地图移动时也会重新投射大量数据.它对于用户来说也是一个相当大的下载(猜测大小超过9MB).

也就是说,可以使用正确的架构在Bing地图上显示数百万个多边形.诀窍是将您的数据转换为图块(图像堆).这样浏览器一次只需处理几张图像.这显着减少了用户必须下载的数据量.这是我制作的一个演示,它渲染了175,000个多边形,每个多边形有200个坐标：http://onsbingmapsdemo.cloudapp.net/在此示例中,将图钉拖到多边形上以检索有关它的一些信息.我可以选择只使用鼠标点击,但我想在这个应用程序中尝试不同的东西.

有几种方法可以生成这些切片图层.这里有一个开源MVC应用程序：http://ajaxmapdataconnector.codeplex.com/

我还有一份尚未发布的白皮书,介绍了如何执行此操作.如果您通过Hotmail.com向ricky_brundritt发送电子邮件,我会向您发送一份论文和代码示例.

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