Reputation: 1118
I'm new to WPF and just trying to get my head around binding, I can get the datagrid to bind, but I have to do it a certain way. Here is my class that if I grab the data in the constructor as shown, it works. I have the datacontext bound to the Attorney class, and the item source to the AttyList property. I have the INotifyChanged working also.
public class Data : CommonBase
{
public Data()
{
getAtty();
}
private List<Attorneys> _AttyList;
public List<Attorneys> AttyList
{
get { return _AttyList; }
set
{
if(value != this._AttyList)
{
_AttyList = value;
NotifyPropertyChanged("AttyList");
}
}
}
public void getAtty()
{
AttyList = new List<Attorneys>();
using (var context = new Context())
{
AttyList = context.Attorney.ToList();
}
}
}
But, lets say I dont want to call getAtty() in the constructor, but in the code behind of the Xaml file, like so,
private void Window_Loaded(object sender, RoutedEventArgs e)
{
var odata = new Data();
odata.getAtty();
}
For whatever reason, the datagrid doesn't populate? I know I can do it in the constructor of the first code post, but if I want to call it individually rather than when I have a new instance i can't. What am i doing wrong?
Edit: Here is most of my XAML:
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:testWPF"
xmlns:Models="clr-namespace:testWPF.Models" x:Class="testWPF.MainWindow"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525" WindowState="Maximized" Loaded="Window_Loaded">
<Grid>
<Grid.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FF3E0213" Offset="0.116"/>
<GradientStop Color="White" Offset="1"/>
<GradientStop Color="#FF970202" Offset="0.983"/>
</LinearGradientBrush>
</Grid.Background>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="35*"/>
<ColumnDefinition Width="12*"/>
</Grid.ColumnDefinitions>
<DataGrid x:Name="dgvAllAttorneys" HorizontalAlignment="Left" Margin="84,26,0,0" MouseDoubleClick="dgvAllAttorneys_MouseDoubleClick" VerticalAlignment="Top" Height="154" Width="208" ItemsSource="{Binding AttyList}" AutoGenerateColumns="False" SelectionMode="Single" IsReadOnly="True" Grid.ColumnSpan="1">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding FirstName}" ClipboardContentBinding="{x:Null}" Header="FirstName"/>
<DataGridTextColumn Binding="{Binding FullName}" ClipboardContentBinding="{x:Null}" Header="LastName" Width="*"/>
</DataGrid.Columns>
<DataGrid.DataContext>
<Models:Data/>
</DataGrid.DataContext>
</DataGrid>
</Grid>
Upvotes: 2
Views: 284
Reputation: 1118
Use an ObservableCollection<Attorneys>
instead of a List so the DataGrid is notified of the changes.
public class Data : CommonBase
{
public Data()
{
getAtty();
}
private ObservableCollection<Attorneys> _AttyList;
public ObservableCollection<Attorneys> AttyList
{
get { return _AttyList; }
set
{
if(value != this._AttyList)
{
_AttyList = value;
NotifyPropertyChanged("AttyList");
}
}
}
public void getAtty()
{
AttyList = new ObservableCollection<Attorneys>();
using (var context = new Context())
{
AttyList = context.Attorney.ToList();
}
}
}
In your XAML where you set your DataContext, give that instance a name.
<DataGrid.DataContext>
<Models:Data x:Name="dataContext" />
<DataGrid.DataContext>
Then in the Window's Loaded event handler, reference that instance to call getAtty()
private void Window_Loaded(object sender, RoutedEventArgs e)
{
dataContext.getAtty();
}
Upvotes: 2