DataBingding not working with custom SfButton

[SZL]

Hello,

I created my own control based on SfButton -> MyNumericButton.

When I click on this button at runtime its value changing to 7.7 (example), but the datasource is not updated when I setup a data binding. The data binding has no effect (I use INotifyPropertyChanged too).

I attach a sample project:

1. When you click on button, its Text should change to 7.7. This is ok.
2. This operation should update the datasource too with data binding, but nothing happen.
3. When I click on Check button, the MessageBox should show 7.7 too, but it is empty text.

Can you help me please why my databinding has not effect?

My binding code:

   myNumericButton1.DataBindings.Clear();

  myNumericButton1.DataBindings.Add("TextValue", MyModel2, nameof(MyModel2.SablonSzerkesztesIdoGepiButton), true, DataSourceUpdateMode.OnPropertyChanged);

I attach my sample to show this behavior.

Thank you very much for help!

BR, SZL

Attachment: Sample_f7adbea9.zip

[SZL]

Hello,

I find the soultion based on this post:

https://www.syncfusion.com/forums/177874/databinding-not-working-with-this-control

Do you have information about the fix in the future?

Thank you!

BR, SZL

[Gokul Thanudhas]

Hi SZL,

The reported issue is not from our control side. We have faced a similar issue from our side and reported to Microsoft team regarding this. Please find the details in the below link.

Binding is not working properly when using custom delegate and Generic EventHandler for respective properties · Issue #7820 · dotnet/winforms (github.com)

We have modified the sample based on your requirement, in which we have changed the CustomDelegate to Eventhandler Delegate. Please refer to the attached sample for your reference.

Regards,

Gokul T

Attachment: Sample_1fbef34f.zip

[SZL]

Hi,

Thank you very much!

I can work with these workarounds now.

BR, SZL

[Harinath Navaneethakrishnan]

We are glad that the provided response meets your requirement. Please let us know if you need further assistance. As always, we are happy to help you out.

[SZL]

Hello,

I try use this workaroung with combobox control, but unfortunatelly in this case its not working. My combobox code:

   public partial class MyComboBox : SfComboBox

    {

        public bool IsAnythingSelected { get { return this.SelectedItem != null && this.SelectedItem != DBNull.Value; } }

        public MyComboBox()

        {

            this.SelectedValueChanged += MyComboBox_SelectedIndexChanged; ;

            InitializeComponent();

        }

        private void MyComboBox_SelectedIndexChanged(object? sender, EventArgs e)

        {

            if (!SelectedItemBindableDuringSet)

            {

                selectedItemBindable = SelectedItem;

            }

        }

        #region Fix binding bug

        private object selectedItemBindable;

        private bool SelectedItemBindableDuringSet = false;

        public object SelectedItemBindable

        {

            get { return selectedItemBindable; }

            set

            {

                selectedItemBindable = value;

                if (this.SelectedItem != value)

                {

                    SelectedItemBindableDuringSet = true;

                    this.SelectedItem = value;

                    SelectedItemBindableDuringSet = false;

                }

            }

        }

        #endregion

    }

Can you help me please, why not working with combobox?

Thank you!

BR, SZL

[Gokul Thanudhas]

The property binding with SelectedItemBindable is updated only after losing focus, but not when selected items is changed. Could you please confirm whether it is the reported issue?