C # call Baidu Map Web Services API-----This method can be used on JS Cross-domain request

The Baidu Map Web Services API provides developers with an HTTP interface, in which the developer initiates a retrieval request via HTTP, retrieving the retrieved data in JSON or XML format. Based on this, users can develop the map application of JavaScript, C #, C + +, Java and so on.

API website Description Link:

Http://developer.baidu.com/map/webservice.htm

Available Interface enumeration:

Get related address hint place suggestion
http://api.map.baidu.com/place/v2/suggestion?query= Metasequoia &region= Chengdu &output=json&ak= 42b8ececa9cd6fe72ae4cddd77c0da5d



Get coordinates geocoding

http://api.map.baidu.com/geocoder?address= Jinjiang District No. 299 Ling ' an road, &output=json&key=42b8ececa9cd6fe72ae4cddd77c0da5d



http://api.map.baidu.com/place/v2/search?ak=42b8ececa9cd6fe72ae4cddd77c0da5d&output=json&query= Blu-ray Coco Sands &page_size=10&page_num=0&scope=1&region= Chengdu


{
"Status": 0,
"Message": "OK",
"Total": 2,
"Results": [
{
"Name": "Blu-ray Coco Sands",
"Location": {
"Lat": 30.687544,
"LNG": 103.996691
},
"Address": "West three ring outside the Jinsha West Source Avenue (It Avenue)",
"UID": "223992992C5EE7E0841541DF"
},
{
"Name": "Blu-ray Coco Sands Phase 2",
"Location": {
"Lat": 30.681123,
"LNG": 103.991123
},
"Address": "Qingyang District Sands it Boulevard",
"UID": "b7bb5abb1cd4982213293580"
}
]
}


Facilities navigation
http://api.map.baidu.com/place/v2/search?ak=42b8ececa9cd6fe72ae4cddd77c0da5d&output=json&query= Library &page_size=20&page_num=0&scope=2&region= Chengdu

The results of obtaining the coordinate interface directly in the browser request are as follows:

The C # call gets the coordinate interface code as follows:

Create a new console program

Using System;
Using System.Collections.Generic;
Using System.Linq;
Using System.Text;
Using System.Net;

Namespace Test
{
    class program
    {
        Private const String Baidu_app_key = " 42B8ECECA9CD6FE72AE4CDDD77C0DA5D ";
        Private Const String A = "188th Metasequoia Street";
      
     
        static void Main (string[] args)
        {
            WebClient client = new WebClient ();
          String json = client. Downloadstring ("http://api.map.baidu.com/geocoder?address=" + A + "&output=json&key=" + baidu_app_key);
            Client. Encoding = Utf8encoding.utf8;
            Console.WriteLine (JSON);
            Console.readkey ();}}

Run Result: