大众点评api接口 asp.net实例

using System;

using System.Collections;

using System.IO;

using System.Net;

using System.Security.Cryptography;

using System.Text;

using System.Web;

namespace dianping_.net_samples

{

class Program

{

static void Main(string[] args)

{

//请替换AppKey以及Secret

string appKey = "612597898";

string secret = "c1891e179c394bb4bb09cbfaf00d242b";

string value = "";

string queryString = "";

//准备参数

Hashtable ht = new Hashtable();

ht.Add("format", "json");

ht.Add("city", "北京");

ht.Add("region", "海淀区");

ht.Add("category", "火锅");

ht.Add("has_coupon", "1");

ht.Add("sort", "2");

ht.Add("limit", "1");

//参数按照参数名排序

ArrayList akeys = new ArrayList(ht.Keys);

akeys.Sort();

//拼接字符串

foreach (string skey in akeys)

{

value += skey + ht[skey].ToString();

queryString += "&" + skey + "=" + Utf8Encode(ht[skey].ToString());

}

StringBuilder sb = new StringBuilder();

sb.Append(appKey);

sb.Append(value);

sb.Append(secret);

value = sb.ToString();

string url = "http://api.dianping.com/v1/business/find_businesses?appkey=" + appKey + "&sign=" + SHA1(value) + queryString;

int status = 0;

Console.WriteLine(url);

Console.WriteLine(RequestUrl(url, out status));

Console.ReadLine();

}

/// <summary>

/// URL请求

/// </summary>

/// <param name="url">URL地址</param>

/// <param name="status">URL请求响应状态码</param>

/// <returns>请求结果</returns>

public static string RequestUrl(string url, out int status)

{

string result = null;

status = 0;

HttpWebResponse response = null;

try

{

HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);

response = (HttpWebResponse)request.GetResponse();

Encoding responseEncoding = Encoding.GetEncoding(response.CharacterSet);

using (StreamReader sr = new StreamReader(response.GetResponseStream(), responseEncoding))

{

result = sr.ReadToEnd();

}

status = (int)response.StatusCode;

}

catch (WebException wexc1)

{

// any statusCode other than 200 gets caught here

if (wexc1.Status == WebExceptionStatus.ProtocolError)

{

// can also get the decription:

// ((HttpWebResponse)wexc1.Response).StatusDescription;

status = (int)((HttpWebResponse)wexc1.Response).StatusCode;

}

}

finally

{

if (response != null)

response.Close();

}

return result;

}

/// <summary>

/// URL请求参数UTF8编码

/// </summary>

/// <param name="value">源字符串</param>

/// <returns>编码后的字符串</returns>

private static string Utf8Encode(string value)

{

return HttpUtility.UrlEncode(value, System.Text.Encoding.UTF8);

}

/// <summary>

/// SHA1加密字符串

/// </summary>

/// <param name="source">源字符串</param>

/// <returns>加密后的字符串</returns>

public static string SHA1(string source)

{

byte[] value = Encoding.UTF8.GetBytes(source);

SHA1 sha = new SHA1CryptoServiceProvider();

byte[] result = sha.ComputeHash(value);

string delimitedHexHash = BitConverter.ToString(result);

string hexHash = delimitedHexHash.Replace("-", "");

return hexHash;

}

}

}