.Net C# (CSharp) API

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Here is a .Net C# API impelemntation using the Json.NET library from James Newton King:


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace SendGrid
{
public class SmtpApiHeader
{
private JObject data = new JObject();

public void AddTo(string to)
{
if (data["to"] == null)
data.Add(new JProperty("to", new JArray()));

(data["to"] as JArray).Add(new JValue(to));
}

public void AddTo(string[] tos)
{
foreach (string to in tos)
AddTo(to);
}

public void AddSubVal(string var, string val)
{
if (data["sub"] == null)
data.Add(new JProperty("sub", new JObject()));

if (data["sub"][var] == null)
(data["sub"] as JObject).Add(new JProperty(var, new JArray()));

(data["sub"][var] as JArray).Add(new JValue(val));
}

public void AddSubVal(string var, string[] vals)
{
foreach (string val in vals)
AddSubVal(var, val);
}

//Not sure what this is for yet, use JObject for now.
public void SetUniqueArgs(JObject val)
{
if (data["unique_args"] == null)
data.Add(new JProperty("unique_args", val));
else
data["unique_args"] = val;
}

public void SetCategory(string cat)
{
if (data["category"] == null)
data.Add(new JProperty("category", cat));
else
(data["category"] as JValue).Value = cat;
}

public void AddFilterSetting(string filter, string setting, object value)
{
if (data["filters"] == null)
data.Add(new JProperty("filters", new JObject()));

if (data["filters"][filter] == null)
(data["filters"] as JObject).Add(new JProperty(filter, new JObject(new JProperty("settings", new JObject()))));

if (data["filters"][filter]["settings"][setting] == null)
(data["filters"][filter]["settings"] as JObject).Add(new JProperty(setting, value));
else
(data["filters"][filter]["settings"][setting] as JValue).Value = value;
}

public string ToJson()
{
using (StringWriter sw = new StringWriter())
{
JsonTextWriter jw =
new JsonTextWriter(sw)
{
QuoteName = true,
Formatting = Formatting.Indented //use formatting so lines are not too long in the SMTP header
};
data.WriteTo(jw);
return sw.ToString();
}
}

public override string ToString()
{
string json = ToJson();
return "X-SMTPAPI: " + json;
}
}
}


Here is sample usage:

SmtpApiHeader header = new SmtpApiHeader();

string[] tos = { "destination1@example.com", "destination2@example.com" };
string[] names = { "Name 1", "Name 2" };
string[] times = { "4 PM", "5 PM" };

header.AddTo(tos);
header.AddSubVal("-name-", names);
header.AddSubVal("-time-", times);
header.SetCategory("initial");
header.AddFilterSetting("footer", "enable", 1);
header.AddFilterSetting("footer", "text/plain", "Thank you for your business");

Response.Write(header.ToString());
Response.End();


More info about Json.NET can be found here:
http://james.newtonking.com/projects/json-net.aspx