Impossible to bind parameter in join clause - sql

Question

I'm doing a cross platform app using Xamarin. I want to bind a ListView with a query.
My query looks like this :
public async Task<List<Meeting>> GetAllMeetings()
{
return await _database.QueryAsync<Meeting>("Select Client.Prenom,Meeting.Id_Client, Meeting.DateRDV, Meeting.HourRDV,Meeting.TypePose,Meeting.IsStudent from 'Meeting' JOIN 'Client' on Meeting.Id_Client = Client.Id");
}
In my ListView I'm able to bind every parameter, except Client.Prenom. I've tried only writing Prenom but nothing shows.
Here's how I bind :
listViewAllMeetings.ItemsSource = await App.Database.GetAllMeetings();
List<Meeting> list = listViewAllMeetings.ItemsSource as List<Meeting>;
And in the xaml file I do like this to bind Prenom:
<Label Text="{Binding Prenom}"
HorizontalOptions="Start"
TextColor="#000000" />
But nothing shows. Any idea ? If I bind the Id_Client it shows the correct Id...
For the record , here's my Meeting table :
public class Meeting {
[PrimaryKey, AutoIncrement]
public int Id { get; set; }
public int Id_Client { get; set; }
public String DateRDV { get; set; }
public String HourRDV { get; set; }
public String TypePose { get; set; }
public bool IsStudent { get; set; }
public bool SheCame { get; set; }
}
my xaml file :
<ListView x:Name="listViewAllMeetings" SeparatorVisibility="Default" SeparatorColor="Silver" HasUnevenRows="True">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout
Orientation="Vertical">
<StackLayout Orientation="Vertical">
<StackLayout Orientation="Horizontal">
<Label Text="{Binding DateRDV}"
HorizontalOptions="Start"
TextColor="#FD6C9E" />
<Label Text="à"
HorizontalOptions="Start"
TextColor="#FD6C9E" />
<Label Text="{Binding HourRDV}"
HorizontalOptions="Start"
TextColor="#FD6C9E" />
</StackLayout>
<StackLayout Orientation="Horizontal">
<Label Text="{Binding Id_Client}"
HorizontalOptions="Start"
TextColor="#FD6C9E" />
<Label Text="Est étudiante ?"
HorizontalOptions="End"
TextColor="#FD6C9E" />
<Label Text="{Binding IsStudent}"
HorizontalOptions="End"
TextColor="#FD6C9E" />
</StackLayout>
</StackLayout>
<StackLayout Orientation="Horizontal">
<Label Text="{Binding TypePose}"
HorizontalOptions="Start"
TextColor="#FD6C9E" />
</StackLayout>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>

Answer 1

this line will take the results of your Query and map it into a Meeting object
return await _database.QueryAsync<Meeting>("Select Client.Prenom,Meeting.Id_Client, Meeting.DateRDV, Meeting.HourRDV,Meeting.TypePose,Meeting.IsStudent from 'Meeting' JOIN 'Client' on Meeting.Id_Client = Client.Id");
your Meeting class does not have any property that Client.Prenom can be mapped onto

Answer 2

Try putting ItemSource on your List,
Just edit this line in your xaml page, keep rest things as same
<ListView x:Name="listViewAllMeetings" ItemsSource="{Binding Path=Meetings}" SeparatorVisibility="Default" SeparatorColor="Silver" HasUnevenRows="True">
Just add this to your parent list ItemsSource="{Binding Path=Meeting}". I guess it will work for you.
Bind the Meeting with the query in your ViewModel.
EDIT ---------
//initialize these variables in your xaml.cs file
ObservableCollection<Meeting> _meetings { get; set; }
ObservableCollection<Meeting> Meetings { get { return _meetings} set { _meetings = value; NotifyPropertyChanged() } }
//Add this in your constructor of xaml.cs file
Meetings = App.Database.GetAllMeetings(); //Add
Correct your query as suggested by Jason
Add the Prenom refrence in Meeting.
public class Meeting {
[PrimaryKey, AutoIncrement]
public int Id { get; set; }
public int Prenom{ get; set; } //ADD here
.....
}
Let me know if it works or not.