MVC json save file - json

Question

I got a view with some textbox and a submit button
when i push submit i want the data of the textboxes in a json file(no database)
Now it works only for save 1data command when i psuh a second time on submit with other data
then hen rewrite my json file how can i save all of it ?
Controller
public class HomeController : Controller
{
public ActionResult Index()
{
// jsonkalender.Add(new kalender() { Password = "" });
//kalender kl = new kalender();
//kl.Password = obj.Password;
//kl.MyEnum = TestEnum.taak;
//obj.Password = kl.Password;
//Load(null);
return View();
}
private const string JsonFileName1 = #"C:\\Users\Alexander\Desktop\times1.json";
private List<kalender> _times;
[HttpPost]
public ActionResult Index(kalender obj)
{
// Load(obj);
// _times.Add(new kalender() { Datum = DateTime.Now.ToString() });
kalender kl = new kalender();
Json(new { datum = obj.Datum,wachtwoord = obj.Password });
// _times.Add(obj);
try
{
}
catch (Exception) { }
obj.SelectedEnumId++;
// kl.Password = obj.Password;
var json = JsonConvert.SerializeObject(obj, Formatting.Indented);
using (var writer = new StreamWriter(JsonFileName1))
{
writer.Write(json);
}
return View();
}
private void Load(kalender obj)
{
if (System.IO.File.Exists(JsonFileName1))
{
using (var reader = new StreamReader(JsonFileName1))
{
var json = reader.ReadToEnd();
obj = JsonConvert.DeserializeObject<kalender>(json);
}
}
if (obj == null)
obj = new kalender();
}
}
}
Model
public class kalender
{
//public string Datum { get; set; }
// [Required]
// [DataType(DataType.Date)]
// public Nullable<System.DateTime> Datum { get; set; }
public string Datum { get; set; }
[Required]
public string Password { get; set; }
[Required]
public string Type { get; set; }
[Required]
[Key]
public int SelectedEnumId { get; set; }
[Required]
public TestEnum MyEnum { get; set; }
}
}
View
#model PE1.Models.kalender
#{
ViewBag.Title = "Index";
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/jqueryui/1.11.1/themes/smoothness/jquery-ui.css" />
<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.11.1/jquery-ui.min.js"></script>
}
#{
AjaxOptions options = new AjaxOptions();
options.HttpMethod = "POST";
options.Confirm = "Zeker?";
options.OnBegin = "OnBegin";
options.OnComplete = "OnComplete";
options.OnFailure = "OnFailure";
options.OnSuccess = "OnSuccess";
options.LoadingElementId = "divProgress";
options.LoadingElementDuration = 1000;
options.UpdateTargetId = "divResponse";
options.InsertionMode = InsertionMode.InsertAfter;
}
<script type="text/javascript">
$(function () { // will trigger when the document is ready
$('.datepicker').datepicker(); //Initialise any date pickers
});
</script>
<div>
<h1>Online Kalender</h1>
<div id="kader">
<p>THuis</p>
#using (Html.BeginForm("Index", "Home", options))
{
#Html.ValidationSummary(true)
<fieldset>
<legend>Kaldender</legend>
#*#Html.DropDownListFor(model => model.Password, listItems)*#<br />
#Html.LabelFor(model => model.Password)<br />
#Html.EditorFor(model => model.Password)
#Html.ValidationMessageFor(model => model.Password)<br />
#Html.EnumDropDownListFor(model => model.MyEnum)
<div class="form-group input-group-sm">
#Html.LabelFor(model => model.Datum)
#Html.TextBoxFor(model => model.Datum, new { #class = "form-control datepicker", placeholder = "Enter Drop-off date here..." })
#Html.ValidationMessageFor(model => model.Datum)
</div>
<input type="submit" value="Submit"/>
<input type="reset" value="Reset"/>
</fieldset>
#Ajax.ActionLink("Klik hier om een Ajax ActionLink uit te voeren", "ProcessLink", options)
}
enum
public enum TestEnum : int
{
taak,
vergadering
}
my output is wrong how can i change it ?
{
"Datum": "10/28/2014",
"Password": "hrth",
"Type": null,
"SelectedEnumId": 0,
"MyEnum": 0,
"rand1": 0
}{
"Datum": "10/28/2014",
"Password": "hrth",
"Type": null,
"SelectedEnumId": 0,
"MyEnum": 0,
"rand1": 0
}
this is my json file but i need this
[
{
"Datum": "10/28/2014",
"Password": "hrth",
"Type": null,
"SelectedEnumId": 0,
"MyEnum": 0,
"rand1": 0
},{
"Datum": "10/28/2014",
"Password": "hrth",
"Type": null,
"SelectedEnumId": 0,
"MyEnum": 0,
"rand1": 0
}
]

Answer 1

Use the Overload for the SteamWriter object that appends to a file instead of overwriting a file.
http://msdn.microsoft.com/en-us/library/36b035cb(v=vs.110).aspx
using (var writer = new StreamWriter(JsonFileName1, true))
{
writer.Write(json);
}
Notice the addition of the bool true in the StreamWriter constructor