C# 高德地图WebApi对接示例

1、登录或注册高德地图开放平台然后申请应用key（需要认证个人或企业开发者）

高德开放平台 | 高德地图API (amap.com)https://developer.amap.com/?ref=http%3A%2F%2Fdeveloper.amap.com%2Fdev%2Fkey

2、创建新应用，为新应用添加key，完成第一项后即可看到key管理

3、具体的开发文档、接口入参出参以及结果示例等详见高德地图开放平台官网

地理/逆地理编码-API文档-开发指南-Web服务 API | 高德地图API (amap.com)https://developer.amap.com/api/webservice/guide/api/georegeo

4、直接书写具体示例（以区域查询为例）

开发语言：C#

开发工具：visual studio 2019

开发项目类型：控制台程序

/// <summary>
/// 行政区域查询 - 高德地图
/// </summary>
/// <param name="args">请求入参</param>
/// <returns>行政区域返回值</returns>
private static string GetRegionByURL(string parameters)
{
	string strResult = "";
	string url = string.Format("https://restapi.amap.com/v3/config/district?{0}", parameters);
	try
	{
		HttpWebRequest req = WebRequest.Create(url) as HttpWebRequest;
		req.ContentType = "multipart/form-data";
		req.Accept = "*/*";
		//req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)";
		req.UserAgent = "";
		req.Timeout = 30000; // 30秒连接不成功就中断
		req.Method = "GET";
		req.KeepAlive = true;
		HttpWebResponse response = req.GetResponse() as HttpWebResponse;
		using (StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
		{
			strResult = sr.ReadToEnd();
		}
	}
	catch (Exception ex)
	{
		strResult = "";
		Console.WriteLine("异常信息提示：" + ex.Message);
		Console.ReadLine();
	}
	return strResult;
}

主函数调用

const string key = "xxxxxxxxxx"; // 个人高德申请的应用key
static void Main(string[] args)
{
	Console.WriteLine("请输入要查询的省份名称，如山东");
	string keywords = Console.ReadLine();
	string queryRegionResult = GetRegionByURL($"key={key}&subdistrict=2&extensions=base&keywords=" + keywords);
	Console.WriteLine($"查询{keywords}的结果为：" + queryRegionResult);
	Console.ReadLine();
}

运行结果如下：