SQLite Database search in Xamarin Forms - sqlite

Question

I have a search bar with list. The list will display all the suggestions from the database. The problem my search query is not working. I am getting zero count. I am not sure if my query has a correct syntax.
private void NameSearch_SearchButtonPressed(object sender, EventArgs e)
{
var keyword = NameSearch.Text;
var db = DependencyService.Get<ISQLiteDB>();
var conn = db.GetConnection();
var getCaf = conn.QueryAsync<ContactsTable>("SELECT FileAS FROM tblContacts WHERE FileAs LIKE '%?%'", keyword);
var resultCount = getCaf.Result.Count;
if (resultCount > 0)
{
var result = getCaf.Result;
lstName.ItemsSource = result;
}
}

Answer 1

In your Query, it contains "FileAS" and "FileAs" case sensitivity issue. Make sure they both are same and exactly like the column name.
Change your Query to:
conn.QueryAsync<ContactsTable>($"SELECT FileAS FROM tblContacts WHERE FileAS LIKE '%{ keyword }%'").ToList();
OR
To reduce spelling mistakes you can try following Lambda Expression as Query:
conn.Table<ContactsTable>().Where(x => x.FileAS.Contains(keyword)).ToList();
So, Your Final Code should look like:
private void NameSearch_SearchButtonPressed(object sender, EventArgs e)
{
var keyword = NameSearch.Text;
var db = DependencyService.Get<ISQLiteDB>();
var conn = db.GetConnection();
var getCaf = conn.Table<ContactsTable>().Where(x => x.FileAS.Contains(keyword)).ToList();
var resultCount = getCaf.Count();
if (resultCount > 0)
{
lstName.ItemsSource = getCaf;
}
}
Hope this will solve your issue.