![]() ![]() If you want to find out more about the attributes available in SQLite, check my other post.īy Mark Gentry on Windows Server 2019 - Change product key does nothing, 03:30 AMīy Cathy on In-Place Upgrade for a Windows Server domain controller, 18:28 PMīy Mr. If you wan't a full example of all the functions, go here: It'll give you some nice examples to follow. On a side note, if you don't set a primary key, you won't be able to delete from the table, since it requires the primary key value to find the correct record. Then finally, to delete them, use this: public int DeleteEventItem(Int32 intDBId) Return objDatabase.Table().FirstOrDefault(x => x.DBId = intDBId) return The next AUTOINCREMENT value fortableName If an INSERT. To insert items into that table, use this handy method: public Int32 InsertEventItem(EventItem objEventItem)Īnd to get them, use this: public EventItem GetEventItemByDBId (Int32 intDBId) Here is what I use to get the next AUTOINCREMENT value for a specific table: / Query sqlitesequence table and search for the AUTOINCREMENT value for tableName param tableName The table name with which the AUTOINCREMENT value is associated.
Since I've also got another id given to me from a web service, chances are I'll be running queries to find items by that id too, so I've added the Indexed parameter to the Id variable. I've added a parameter to the DBId variable telling SQLite to use DBId as my primary key and that it should also automatically increment the value. I'll need to tell SQLite that this is what I intend, so I make the model look like this: public class EventItem You'll notice I've got a DBId and an Id variable, say I want to use the DBId as the primary key for the database table and Id as the Id given to me by a web service I'm using to get these Event items. So say you have a model for an object you want to store in the local database, you'll need to create said database and add a table for the items defined by your model, here's my model: public class EventItemĪnd here's the code to create the table in the database. I won't go into installing SQLite into your project in this post, but I just wanted to provide another place on the web that points you in the right direction for the simple yet sometimes hard to find things when creating an app with Xamarin and setting up your database in Xamarin Forms also requires you to do some native work in the separate projects for each device, but when it comes down to it, you'll be using an SQLiteConnection object, in this post, i'll refer to that object as 'the database'. You'll kick yourself when you find out how. It's just hard sometimes to get your head around the initial setup, as is the case when setting a primary key. It's easy to set a primary key with the synchronous API because you'll be typing the SQL yourself, however the asynchronous API is much easier to use for people with less SQL knowledge and requires much less code. ![]() SQLite has two API's available, the synchronous and the asynchronous API's. ![]()
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