isolated storage in windows phone developement - windows-phone-7

Question

Im using VS to develop a windows phone app. Im doing it wp8 but it doesnt matter because it the code works for 7 too. Anyway, I have a text box and a button. When the text from the text box is entered, and the button is clicked it adds that to isolated storage.
On my other page, I have a textblock. Which should display what I wrote in the text box. It does work, but first let me sho you my code.
if (appsettings.Contains("name"))
{
appsettings.Remove("name");
appsettings.Add("name", TitleTextBox.Text); //rename if already exists
}
and then the second page that collects the info is below.
if (appsettings.Contains("name"))
{
string content = appsettings["name"].ToString(); //converts to string
titleTextBlock.Text = content; //shows title in text block
}
The problem is, the "name" works. However, if I call it ANYTHING else it does not. I want to add a different name because i want to be able to input two lots. For example two text box's and then when you press the button and go to the other page, it has two textblocks displaying each string in each one. I can't seem to do this because only "name" works. Ive changed it to other names and it doesnt work. Does anyone know why?

Answer 1

IsolatedStorageSettings works as a Dictionary. If you want to acces a specific key it should exist in the Dictionary.
If you try to change the value that already exists you can do like this:
if (appSettings.Contains("key")) appSettings["key"] = "new value";
else appSettings.Add("key", "new value");
Don't also forget to save your appSettings:
appSettings.Save();
And also according to your code - in ISS you can put not only string - it can be any object, if you want to get it, you should make a cast or use as:
string content = (string)appsettings["name"]; //converts to string
string content = appsettings["name"] as string;
EDIT - after comments, rebuild once more
If you want to have a to-do-list and you know that every task has its specific title, description and time then I would advise to create a special class for this, for example:
public class myTodo
{
public string TaskTitle { get; set; }
public string TaskDescription { get; set; }
public TimeSpan ElapsedTime { get; set; }
}
I used TimeSpan because I think it's easier to manage Time with it. Then if you want to Save/Load your myTodo you can do like this:
// create an example of your task
myTodo newTask = new myTodo() { TaskTitle = "Clean", TaskDescription = "Clean room", ElapsedTime = new TimeSpan(2, 0, 0) };
// add it to ISS and save
if (appSettings.Contains("firatTask")) appSettings["firatTask"] = newTask;
else appSettings.Add("firatTask", newTask);
appSettings.Save();
// try to load
myTodo read = appSettings["firatTask"] as myTodo;
You can access your item like this:
read.Title = TitleTextBox.Text; // and so on
Consider also making a List<myToDo> and be aware that ISS shoul also handle this:
List<myTodo> listJob = new List<myTodo>();
listJob.Add(firstTask); // firstTask is myToDo
listJob.Add(secondTask); // secondTask is myToDo
if (appSettings.Contains("listTask")) appSettings["listTask"] = listJob;
else appSettings.Add("listTask", listJob);
appSettings.Save();
List<myTodo> readList = appSettings["listTask"] as List<myTodo>;