Serialize an object with DataContractJsonSerializer - c#-4.0

Question

I have a class which contains some items. I want to serialize an instance of this class to json using the DataContractJsonSerializer :
[DataContract]
public class Policy
{
private string expiration { get; set; }
private List<List<string>> conditions { get; set; }
public Policy(){}
public Policy(string expiration, List<List<string>> conditions){
this.expiration = expiration;
this.conditions = conditions;
}
[DataMember]
public string DateExpiration
{
get{ return expiration;}
set{expiration = value;}
}
[DataMember]
public List<List<string>> Conditions
{
get{return conditions;}
set{conditions = value;}
}
}
When serialized to json it should be like this :
{
"expiration": "2011-04-20T11:54:21.032Z",
"conditions": [
["eq", "acl", "private"],
["eq", "bucket": "myas3bucket"],
["eq", "$key", "myfilename.jpg"],
["content-length-range", 0, 20971520],
["eq", "$redirect", "myredirecturl"],
]
}
I tried like this but nothing :
string expiration = "2012-12-01T12:00:00.000Z";
List<List<string>> conditions = new List<List<string>>()
{
new List<string>(){ "[ eq", "acl", "private ]" },
new List<string>(){ "[ eq", "bucket", "myas3bucket]" },
new List<string>(){ "[ eq", "$key", "myfilename.jpg ]" },
new List<string>(){ "[ content-length-range", "0", "20971520]" },
new List<string>(){ "[ eq", "$redirect", "myredirecturl]" }
};
Policy myPolicy = new Policy(expiration,conditions);
string policy = JSONHelper.Serialize<Policy>(myPolicy);
thanks

Answer 1

First off... your class needs a little help:
[DataContract]
public class Policy
{
public Policy(){}
public Policy(string expiration, List<List<string>> conditions){
this.DateExpiration = expiration;
this.Conditions = conditions;
}
[DataMember]
public string DateExpiration { get; set; }
[DataMember]
public List<List<string>> Conditions { get; set; }
}
Try removing the brackets in your lists:
string expiration = "2012-12-01T12:00:00.000Z";
List<List<string>> conditions = new List<List<string>>()
{
new List<string>(){ "eq", "acl", "private" },
new List<string>(){ "eq", "bucket", "myas3bucket" },
new List<string>(){ "eq", "$key", "myfilename.jpg" },
new List<string>(){ "content-length-range", "0", "20971520" },
new List<string>(){ "eq", "$redirect", "myredirecturl" }
};
Policy myPolicy = new Policy(expiration,conditions);
string policy = JSONHelper.Serialize<Policy>(myPolicy);