using SQLite in windows phone 8.1 c# - sqlite

Question

there is my problem;
I need to use sqlite in my wp8.1 app, i have install the nugets, extensions etc.
I have to save a JSON string into my db.
I know that i have to create a class that i will use to create the table of my sqlite.
Next to that, i know that i have to do a create fct for the table, a insert fct to put my Json string into my table, and a read to get it back and to use that.
I have find tutorial etc and each time i am trying something, it does not work.
I am not a pro in c# and in windows phone 8.1, i am not pro in database. I am in front of a big wall since 3days.
Does anyone can help me plz?
Thank you verry much.

Answer 1

I have create a Json class for my table;
Here is the code:
namespace PhoneApp5.Model
{
public class Json
{
[PrimaryKey]
public string Key { get; set; } //Key for my table
public string String { get; set; } //value String Json for my table
}
}
And then i create some fontion to use the table:
private async void CreateTable() // create my table
{
SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
await conn.CreateTableAsync<Json>();
}
public async void InsertJson(Json json) // insert my Json into my table
{
SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
await conn.InsertAsync(json);
}
public async Task<Json> GetJson(string Key) // read my Json string from table
{
SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
var query = conn.Table<Json>().Where(x => x.Key == Key);
var result = await query.ToListAsync();
return result; // result here is not working because of convertion of System.Connection.Generic.List<PhoneApp5.Model.Json> into PhoneApp5.Model.Json
}
public async void UpdatePost(Json json) // fct update
{
SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
await conn.UpdateAsync(json);
}
public async void DeletePost(Json json) // fct delete
{
SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
await conn.DeleteAsync(json);
}
Then, i don't know what to do.
Thx you for helping