CellTemplate custom object binding

[Goncharuk-Nikita]

Hi!

I want to bind the JobObject object to the CellTemplate:

public class JobObject
    {
        public int JobId { get; set; }
        public bool IsMine { get; set; }
        public DateTime Start { get; set; }
        public List<MonteurObject> Monteurs { get; set; }
        public bool IsProtocolSent { get; set; }
        public string Color { get; set; }

        public override string ToString()
        {
            return $"{JobId}. Start: {Start.ToShortDateString()}, Color: {Color}";
        }
    }

But when I bind a list, nothing is displayed

<ContentView.Resources>
		<ResourceDictionary>

			<DataTemplate x:Key="JobCellTemplate">
				<ViewCell>
					<Label
						HorizontalOptions="Center"
						Text="{Binding JobMon.JobId}"
						VerticalOptions="Center" />
				</ViewCell>
			</DataTemplate>

			<Style TargetType="dg:DataGridColumn">
				<Setter Property="CellTemplate" Value="{StaticResource JobCellTemplate}" />
			</Style>


		</ResourceDictionary>
	</ContentView.Resources>

<!--  Data  -->
		<dg:DataGrid
			BindingContext="{x:Reference This}"
			BorderColor="Gray"
			HeaderHeight="50"
			IsSortable="False"
			ItemsSource="{Binding WeekItems.JobRows}"
			RowHeight="70"
			SelectionEnabled="True">

			<dg:DataGrid.Columns>
				<dg:DataGridColumn Title="{Binding WeekItems.DaysOfMonth[0], StringFormat=' {0}&#10;Mon'}" PropertyName="JobMon" />
				<dg:DataGridColumn Title="{Binding WeekItems.DaysOfMonth[1], StringFormat=' {0}&#10;Tue'}" PropertyName="JobTue" />
				<dg:DataGridColumn Title="{Binding WeekItems.DaysOfMonth[2], StringFormat=' {0}&#10;Wed'}" PropertyName="JobWed" />
				<dg:DataGridColumn Title="{Binding WeekItems.DaysOfMonth[3], StringFormat=' {0}&#10;Thu'}" PropertyName="JobThu" />
				<dg:DataGridColumn Title="{Binding WeekItems.DaysOfMonth[4], StringFormat=' {0}&#10;Fri'}" PropertyName="JobFri" />
				<dg:DataGridColumn Title="{Binding WeekItems.DaysOfMonth[5], StringFormat=' {0}&#10;Sat'}" PropertyName="JobSat" />
				<dg:DataGridColumn Title="{Binding WeekItems.DaysOfMonth[6], StringFormat=' {0}&#10;Sun'}" PropertyName="JobSun" />
			</dg:DataGrid.

[akgulebubekir]

Hi,

Could you please give more details.

• Can you also share Xaml.cs code so I can see the typeof WeekItems.JobRows

[Goncharuk-Nikita]

@akgulebubekir

ScheduleWeekView.xaml.cs:

#region BindableProperties
public partial class ScheduleWeekView : ContentView
	{
	    public static readonly BindableProperty WeekItemsProperty = BindableProperty.Create(
			"WeekItems",
	        typeof(WeekInfo),
	        typeof(ScheduleWeekView));

		public static readonly BindableProperty ItemTappedCommandProperty = BindableProperty.Create(
			"ItemTappedCommand",
			typeof(ICommand),
			typeof(ScheduleWeekView));

		#endregion


		#region Public Fields

		public ICommand ItemTappedCommand
		{
			get => (ICommand)GetValue(ItemTappedCommandProperty);
			set => SetValue(ItemTappedCommandProperty, value);
		}

		public WeekInfo WeekItems
		{
		    get => (WeekInfo) GetValue(WeekItemsProperty);
			set => SetValue(WeekItemsProperty, value);
	    }
}
		#endregion

AllJobsPage.xaml:

<base:ContentBasePage
	x:Class="MDOSchedule.UI.Pages.AllJobs.AllJobsWeekPage"
	xmlns="http://xamarin.com/schemas/2014/forms"
	xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
	xmlns:base="clr-namespace:MDOSchedule.UI.Pages.Base;assembly=MDOSchedule"
	xmlns:extensions="clr-namespace:MDOSchedule.Extensions;assembly=MDOSchedule"
	xmlns:week="clr-namespace:MDOSchedule.UI.Views.Week;assembly=MDOSchedule"
	Title="{extensions:Translate AllJobsWeekPageTitle}">

	<ContentPage.ToolbarItems>
		<ToolbarItem
			Command="{Binding RefreshItemsCommand}"
			Icon="ic_refresh.png"
			Order="Primary" />
	</ContentPage.ToolbarItems>

	<ContentPage.Content>
		<week:ScheduleWeekView ItemTappedCommand="{Binding JobTappedCommand}" WeekItems="{Binding WeekJobs}" />
	</ContentPage.Content>
</base:ContentBasePage>

AllJobsViewModel.cs

public class AllJobsWeekViewModel : BaseViewModel
   {
		#region Public Fields

		public WeekInfo WeekJobs
		{
			get => Get<WeekInfo>();
			set => Set(value);
		}

		#endregion


		#region Commands

		public ICommand JobTappedCommand => new Command<JobObject>(NavigateToJobDetail);

       public ICommand RefreshItemsCommand => MakeCommand(RefreshItems);


       private void NavigateToJobDetail(JobObject jo)
       {

       }

       private void RefreshItems()
       {

       }

       #endregion


       #region Override Methods

       public override async Task OnPageAppearing()
       {

			var rowData = GetTestData();
	        var days = new List<string> {"14", "15", "16", "17", "18", "19", "20"};

			WeekJobs = new WeekInfo(rowData, days);

	        await Task.FromResult(0);	       
       }

       #endregion

       #region Test

       public List<JobRow> GetTestData()
       {
	        var rows = new List<JobRow>();

			for (int i = 0; i < 16; i++)
			{
				var row = new JobRow(
					i < 12 ? new JobObject() {Color = "#f99472", JobId = 42} : null,
					new JobObject() {Color = "#b6ff7c", JobId = 62 },
					i < 5 ? new JobObject() {Color = "#b6ff7c", JobId = 42 } : null,
					new JobObject() {Color = "#f99472", JobId = 52 },
					i < 14 ? new JobObject() {Color = "#f99472", JobId = 12 }: null,
					new JobObject() {Color = "#b6ff7c", JobId = 42 },
					i < 5 ? new JobObject() { Color = "#b6ff7c", JobId = 42 } : null);
				rows.Add(row);
			}

	        return rows;
       }

       #endregion
   }

Models

WeekInfo.cs:

public class WeekInfo
    {
		public List<JobRow> JobRows { get; set; }

		public List<string> DaysOfMonth { get; set; }

	    public WeekInfo(List<JobRow> jobRows, List<string> daysOfMonth)
	    {
		    JobRows = jobRows;
		    DaysOfMonth = daysOfMonth;
	    }
    }

JobRow.cs

public class JobRow
    {
		public JobObject JobMon { get; set; }
		public JobObject JobTue { get; set; }
		public JobObject JobWed { get; set; }
		public JobObject JobThu { get; set; }
		public JobObject JobFri { get; set; }
		public JobObject JobSat { get; set; }
		public JobObject JobSun { get; set; }

	    public JobRow() { }

	    public JobRow(params JobObject[] jobs)
	    {
		    JobMon = jobs[0];
		    JobTue = jobs[1];
		    JobWed = jobs[2];
		    JobThu = jobs[3];
		    JobFri = jobs[4];
		    JobSat = jobs[5];
		    JobSun = jobs[6];
	    }
    }

JobObject.cs:

public class JobObject
    {
        public int JobId { get; set; }
        public bool IsMine { get; set; }
        public DateTime Start { get; set; }
        public List<MonteurObject> Monteurs { get; set; }
        public bool IsProtocolSent { get; set; }
        public string Color { get; set; }

        public override string ToString()
        {
            return $"{JobId}. Start: {Start.ToShortDateString()}, Color: {Color}";
        }
    }

I checked and all the data comes in the DataGrid

[riaanvdl]

im having the same issue, im creating a custom datatemplate for my cell, but if I set the PropertyName on the column then nothing is showing up in the cell. Its not binding inside the datatemplate. Did you manage to get this working in the end?

[akgulebubekir]

Once you set the PropertyName for the column, it set that property as binding context. You don't need to specify again. It should be working once you replace Text="{Binding JobMon.JobId}" with Text="{Binding JobId}" as below

<DataTemplate x:Key="JobCellTemplate">
	<ViewCell>
		<Label
			HorizontalOptions="Center"
			Text="{Binding JobId}"
			VerticalOptions="Center" />
	</ViewCell>
</DataTemplate>

[dasdingo]

When using datatemplate I need to deactivate "IsSortable" on the grid because I will get exception with "Please set the PropertyName property of Column", when I try to sort by tapping on the header column. I don't know how to make the Datagrid use sortable having DataTemplates for the columns. I think my issue is similar.