DisplayMemberPath not working with Arrays

Thomas Loidolt

Asked On November 20, 2018 10:29 AM UTC

Hi,

I want to add a list of classes at the DataSource and the class has a string[] property with name "Entries".

For example in the SfDataGrid I add as MappingName = "Entries[0]" and the Cell references to any_object.Entries[0].

I hoped that it works simliar to DisplayMemberPath but I got not the same successful result.

Does anybody has a hint?

My code:

...

_comboBox = new SfComboBox();

_comboBox.IsEditableMode = false;

_comboBox.MaximumDropDownHeight = 200;

_comboBox.HeightRequest = 40;

Entries = new ObservableCollection<SelectionViewEntry>();

_comboBox.DataSource = this.Entries;

_comboBox.DisplayMemberPath = "Entries[0]";

...

public class SelectionViewEntry

{

public string[] Entries { get; set; }

}

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Paul Anderson S [Syncfusion]

Replied On November 21, 2018 12:07 PM UTC

Hi Thomas Loidolt,

Greetings from Syncfusion.

We checked the given code snippet and when using String [] type for the data source it returns only the array object. We have also tested the same String [] type data with the ListView control and it also returned only the array object. We have prepared a sample on how to use a collection of a custom class and display the desired property using DisplayMemberPath. Please find the sample from the below link.

Sample link: http://www.syncfusion.com/downloads/support/directtrac/general/ze/Combo_Sample229325923

For more information about using “DisplayMemberPath” property is given below:

https://help.syncfusion.com/xamarin/sfcombobox/populating-data#populating-business-objects

Please check our sample and let us know if you have any concerns.

Regards,

Paul Anderson

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Thomas Loidolt

Replied On November 21, 2018 03:40 PM UTC

Hi,

your solution is not working for my requirements but I found another way to solve it:

public class SelectionViewEntry

{

public int ColumnIndex { get; set; }

public string Entry { get => Entries[ColumnIndex]; set => Entries[ColumnIndex] = value; }

public string[] Entries { get; set; }

}

And this is a working example of SfDataGrid and MappingName:

_dataGrid.Columns.Add(new GridTextColumn() { MappingName = "Features[" + i.ToString() + "]", HeaderText = item.Value.Value, TextAlignment = item.Value.HorizontalAlignment, FontAttribute = FontAttributes.Bold });

BR,Thomas

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Paul Anderson S [Syncfusion]

Replied On November 22, 2018 04:23 AM UTC

Hi Thomas,

Thanks for the update. We are glad that you have achieved your requirement. Please get in touch if you required further assistance.

Regards,

Paul Anderson

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Thread ID:	Created:	Updated:	Platform:	Replies:
141043	Nov 20,2018 10:29 AM UTC	Nov 22,2018 04:23 AM UTC	Xamarin.Forms	3

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