如何简化地图上的图钉？

huangapple
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英文:

How can i simplify pins in maps

问题

所以我已经在我的VS Xamarin项目上实现了Google Maps。
我知道有一种方法可以简化我的代码，但我不知道如何更进一步。
我的地图上有很多标记，每次我创建一个标记，我都会创建一个完整的标记，所以我想简化这个过程，如果可能的话，从Excel文件中提取信息。

我的代码：

  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Linq;
  5. using System.Text;
  6. using System.Threading.Tasks;
  7. using Xamarin.Forms;
  8. using Xamarin.Forms.Maps;
  10. namespace ------
  11. {
  12.     
  13.     [DesignTimeVisible(false)]
  14.     public partial class MainPage : ContentPage
  15.     {
  16.         public MainPage()
  17.         {
  18.             InitializeComponent();
  19.             Position position = new Position(36.9628066, -122.0194722);
  20.             MapSpan mapSpan = new MapSpan(position, 0.01, 0.01);
  21.             Map map = new Map(mapSpan)
  22.             {
  23.                MapType = MapType.Hybrid
  24.             
  25.             };
  26.             Content = map;
  27.             Pin pin = new Pin
  28.             {
  29.                 Label = "Santa HEY MAN",
  30.                 Address = "The city with a boardwalk",
  31.                 Type = PinType.Place,
  32.                 Position = new Position(36.9628066, -122.0194722)
  33.             };
  34.             map.Pins.Add(pin);
  36.             Pin pin2 = new Pin
  37.             {
  38.                 Label = "USA",
  39.                 Address = "2020",
  40.                 Type = PinType.Place,
  41.                 Position = new Position(36.9628066, -122.0194722)
  42.             };
  43.             map.Pins.Add(pin2);
  46.         }
  48.     }
  49. }

在这里，我只展示了2个标记，但实际上，我有30个标记。
我该如何简化这个过程？
非常感谢！ 如何简化地图上的图钉？

英文:

So I have implemented Google Maps on my VS Xamarin project.
I know there is a way to simplify my code but I don't know how more could I do it.
I have a bunch of markers on my map and each time I create one I create at whole so I want to simplify this process and if possible extract the information from an excel file.

My code:

  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Linq;
  5. using System.Text;
  6. using System.Threading.Tasks;
  7. using Xamarin.Forms;
  8. using Xamarin.Forms.Maps;
  10. namespace ------
  11. {
  12.     
  13.     [DesignTimeVisible(false)]
  14.     public partial class MainPage : ContentPage
  15.     {
  16.         public MainPage()
  17.         {
  18.             InitializeComponent();
  19.             Position position = new Position(36.9628066, -122.0194722);
  20.             MapSpan mapSpan = new MapSpan(position, 0.01, 0.01);
  21.             Map map = new Map(mapSpan)
  22.             {
  23.                MapType = MapType.Hybrid
  24.             
  25.             };
  26.             Content = map;
  27.             Pin pin = new Pin
  28.             {
  29.                 Label = "Santa HEY MAN",
  30.                 Address = "The city with a boardwalk",
  31.                 Type = PinType.Place,
  32.                 Position = new Position(36.9628066, -122.0194722)
  33.             };
  34.             map.Pins.Add(pin);
  36.             Pin pin2 = new Pin
  37.             {
  38.                 Label = "USA",
  39.                 Address = "2020",
  40.                 Type = PinType.Place,
  41.                 Position = new Position(36.9628066, -122.0194722)
  42.             };
  43.             map.Pins.Add(pin2);
  46.         }
  48.     }
  49. }

Here I only show 2 pins but in reality, I have 30 pins.
How could I make this simpler?
Thanks a lot!
如何简化地图上的图钉？

答案1

得分: 0

以下是翻译好的部分：

首先，创建一个包含您的数据并将其包含在项目中的 JSON 文件。

  1. [ 
  2.   { "Label": "USA", "Address": "2020", "Lat": "36.9628066", "Long": "-122.0194722" },
  3.   ... 
  4.   { "Label": "Santa HEY MAN", "Address": "The city with a boardwalk", "Lat": "36.9628066", "Long": "-122.0194722" }
  5. ]

然后，在您的代码中：

  1. // 读取文件
  2. var json = File.ReadAllText(path);
  4. // 使用 NewtonSoft 进行反序列化
  5. var places = DeserializeObject<List<Place>>(json);
  7. // 然后创建标记点
  8. foreach (var place in places)
  9. {
  10.    var pin = new Pin
  11.         {
  12.             Label = place.Label,
  13.             Address = place.Address,
  14.             Type = PinType.Place,
  15.             Position = new Position(place.Lat, place.Long)
  16.         };
  17.    map.Pins.Add(pin);
  18. }

请注意，上述代码是伪代码示例，不是 JSON 或 C# 的正确语法。

英文:

note this is all pseudocode, not syntactically correct json/C#

first, create a json file with your data and include it in your project

  1. [ 
  2.   { Label = &quot;USA&quot; Address = &quot;2020&quot;, Lat = &quot;36.9628066&quot; Long = &quot;-122.0194722&quot; },
  3.   ... 
  4.   { Label = &quot;&quot;Santa HEY MAN&quot;, Address = &quot;The city with a boardwalk&quot;, Lat = &quot;36.9628066&quot; Long = &quot;-122.0194722} }
  5. ]

then, in your code

  1. // read the file
  2. var json = File.ReadAllText(path);
  4. // deserialize using NewtonSoft
  5. var places = DeserializeObject&lt;List&lt;Place&gt;&gt;(json);
  7. // then create pins
  8. foreach (var place in places)
  9. {
  10.    var pin = new Pin
  11.         {
  12.             Label = place.Label,
  13.             Address = place.Address,
  14.             Type = PinType.Place,
  15.             Position = new Position(place.Lat, place.Long)
  16.         };
  17.    map.Pins.Add(pin);
  18. }

huangapple
  • 本文由 发表于 2020年8月7日 19:15:37
  • 转载请务必保留本文链接：https://go.coder-hub.com/63300677.html
  • android
  • c#
  • java
  • xamarin
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