上一篇中有Json序列化相关问题得到了解决。
那么结果集为Json串时,如何将Json串转成C#对象呢?
现举例说明:
-现有如下字符串数据
string k = "{"rings":[" +"[[34995.513100000098,4304381.4231000002],[34988.120099999942,4304371.5420999993]," + "[34995.513100000098,4304381.4231000002],[34988.120099999942,4304371.5420999993]," + "[34995.513100000098,4304381.4231000002],[34988.120099999942,4304371.5420999993]]]," + ""spatialReference":";
-想将上面的数据转换成List<point>
public class point { public decimal x { get; set; } public decimal y { get; set; } }
步骤1:
-截取字符串
public string strCutOut(string str) { string str1 = str.Substring(str.IndexOf(":[[") + 3, str.IndexOf("]],") - 11); string str2 = str1.Replace("],[", "]$["); string str3 = str2.Replace("[", "{'x':"); string str4 = str3.Replace("]", "}"); string str5 = str4.Replace(",", ",'y':"); string str6 = str5.Replace("$", ","); string str7 = str6.Replace("'", """); return str7; }
-得到如下字符串
"{"x":34995.513100000098,"y":4304381.4231000002},
{"x":34988.120099999942,"y":4304371.5420999993},
{"x":34995.513100000098,"y":4304381.4231000002},
{"x":34988.120099999942,"y":4304371.5420999993},
{"x":34995.513100000098,"y":4304381.4231000002},
{"x":34988.120099999942,"y":4304371.5420999993}"
步骤2:
-引用System.Runtime.Serialization.Json;
-反序列化字符串
public List<point> convertObject(string json) { MemoryStream stream2 = new MemoryStream(); DataContractJsonSerializer ser2 = new DataContractJsonSerializer(typeof(List<point>)); StreamWriter wr = new StreamWriter(stream2); wr.Write(json); wr.Flush(); stream2.Position = 0; Object obj = ser2.ReadObject(stream2); List<point> list = (List<point>)obj; return list; }
步骤3:
-调用字符串截取及反序列化字符串
public void readJson(){ string k = "{"rings":[" +"[[34995.513100000098,4304381.4231000002],[34988.120099999942,4304371.5420999993]," + "[34995.513100000098,4304381.4231000002],[34988.120099999942,4304371.5420999993]," + "[34995.513100000098,4304381.4231000002],[34988.120099999942,4304371.5420999993]]]," + ""spatialReference":"; string str = strCutOut(k); string json = "[" + str + "]"; List<point> ls = convertObject(json); }
*得到的结果集ls为: