Json序列化和反序列化方法@H_502_1@

/// <summary>
/// Json序列化,用于发送到客户端
/// </summary>
public static string ToJsJson(this object item)
{@H_502_1@

DataContractJsonSerializer serializer = new DataContractJsonSerializer(item.GetType());@H_502_1@

using (MemoryStream ms = new MemoryStream())
{@H_502_1@

serializer.WriteObject(ms,item);@H_502_1@

StringBuilder sb = new StringBuilder();@H_502_1@

sb.Append(Encoding.UTF8.GetString(ms.ToArray()));@H_502_1@

return sb.ToString();@H_502_1@

}@H_502_1@

}@H_502_1@

/// <summary>
/// Json反序列化,用于接收客户端Json后生成对应的对象
/// </summary>
public static T FromJsonTo<T>(this string jsonString)
{@H_502_1@

DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));@H_502_1@

MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));@H_502_1@

T jsonObject = (T)ser.ReadObject(ms);@H_502_1@

ms.Close();@H_502_1@

return jsonObject;@H_502_1@

} @H_502_1@

实体类@H_502_1@

[DataContract]
public class TestObj
{
[DataMember]
public string make { get; set; }
[DataMember]
public string model { get; set; }
[DataMember]
public int year { get; set; }
[DataMember]
public string color { get; set; }
}--------------------------------------------javascript获取Json---------------------------------@H_502_1@

javascript调用测试代码@H_502_1@

$('#getJson').click(function() {
$.ajax({
url: "getJsonHandler.ashx",
type: 'GET',
data: {},
dataType: 'json',
timeout: 1000,
error: function(XMLHttpRequest,textStatus,errorThrown) { alert(textStatus) },
success: function(result) {@H_502_1@

alert(result.make);
alert(result.model);
alert(result.year);
alert(result.color);
}@H_502_1@

});
});C#后台生成代码@H_502_1@

public class getJsonHandler: IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
TestObj obj = new TestObj();@H_502_1@

obj.make = "Make is Value";
obj.model = "Model is Value";
obj.year = 999;
obj.color = "Color is Value";@H_502_1@

context.Response.Write(obj.ToJsJson());
}
public bool IsReusable
{
get
{
return false;
}
}
}@H_502_1@

//返回值为 {"color":"Color is Value","make":"Make is Value","model":"Model is Value","year":999} @H_502_1@

---------------------------------C#由Json生成对象---------------------------------------@H_502_1@

javascript调用测试代码 @H_502_1@

$('#postJson').click(function() {@H_502_1@

var m_obj = { make: "Dodge",model: "Coronet R/T",year: 1968,color: "yellow" };
var jsonStr = JSON.stringify(m_obj); //用Json2.js生成Json字符串@H_502_1@

$.ajax({
url: "postJsonHandler.ashx",
type: 'POST',
data: { postjson: jsonStr },
success: function(result) {@H_502_1@

alert(result.success);
}@H_502_1@

});
});C#后台生成代码@H_502_1@

public class postJsonHandler: IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
string jsonStr = context.Request["postjson"];@H_502_1@

TestObj obj = jsonStr.FromJsonTo<TestObj>();@H_502_1@

if (string.IsNullOrEmpty(obj.make) || string.IsNullOrEmpty(obj.model) || string.IsNullOrEmpty(obj.color) @H_502_1@

|| obj.year < 0)
{
context.Response.Write("{success:false}");
}
else
{
context.Response.Write("{success:true}");
}@H_502_1@

public bool IsReusable
{
get
{
return false;
}
}
} @H_502_1@

使用Json时需要注意,服务器端拼凑生成Json字符串时,一定要注意把字符串用/"/"包裹,不然客户端接收时肯定会报错,根据Json字符串生成对象,是根据对应的名称赋值,多于或少于都不会报错.@H_502_1@