B4J Question [SOLVED] B4XComboBox / How do I remove an item?

[christianjeannot]

Hello community,

I am using this code to remove an item from a B4XComboBox and showing the first item.

        Items.RemoveAt(ToDeleteIndex)
        cbProfile.SelectedIndex = 0

I still see the text from the removed index. Do I have to initialize again or how can I remove also the text from that index?

I have searched the guides, the examples I found and the forum but found no answer to this.

Best regards

--Christian

 

[Eme Fibonacci]

XUI Views 2.45

It´s work fine for me.

    B4XComboBox1.cmbBox.Items.RemoveAt(1)
    B4XComboBox1.cmbBox.SelectedIndex=0

 

[christianjeannot]

@Eme Fibonacci
Thank you for your testing.
From your code I guess it is necessary to address the B4XComboBox completely.
I do not make this in my code completely. I will test this in a small app.

How did you fill the B4XComboBox?

 

[Eme Fibonacci]

@Eme Fibonacci
Thank you for your testing.
From your code I guess it is necessary to address the B4XComboBox completely.
I do not make this in my code completely. I will test this in a small app.

How did you fill the B4XComboBox?

For i = 1 To 10
       Items.Add($"Item #${i}"$)
 Next
 B4XComboBox1.SetItems(Items)

[B4X] XUI Views - Cross platform views and dialogs

XUI Views is a b4x library (https://www.b4x.com/android/forum/threads/100383/#content). The same b4xlib library is compatible with B4A, B4i and B4J It is a collection of custom views and dialogs. Everything is written in B4X. The source code is included inside the b4xlib file, which is a zip...

www.b4x.com

 

[christianjeannot]

@Eme Fibonacci
Thank you. I will test it (expected on Saturday).

 

[christianjeannot]

I tested it.

I do not get Items.RemoveAt in the context from the B4XComboBox. The IDE tells me that there is no "item".
I have uploaded a small test project. Maybe you can check it.
I use XUIViews 2.44.

 

[klaus]

The Items list is not directly linked to the B4XComboBox.
This code works in B4A and B4J, not tested in B4i.

    Items.RemoveAt(ToDeleteIndex)
    cbHelper.SetItems(Items)
'   cbHelper.SelectedIndex=0 ' not needed

You need to set the Items list again to the B4XComboBox.

This code works in B4J:

    cbHelper.cmbBox.Items.RemoveAt(ToDeleteIndex)
    cbHelper.SelectedIndex=0

This code works in B4A:

    cbHelper.cmbBox.RemoveAt(ToDeleteIndex)
    cbHelper.SelectedIndex=0

 

[christianjeannot]

@klaus

many thanks for your information.

I did miss / not understand cmBox.

Meanwhile I tried this code without cmBox:

Private Sub btnDelete_Click
        ToDeleteIndex = cbHelper.SelectedIndex
        'Log($"Selected Item Index: ${ToDeleteIndex}"$)
        Items.RemoveAt(ToDeleteIndex)
        cbHelper.SetItems(Items)
        cbHelper.SelectedIndex=0
End Sub

It worked in B4J. Is this ok?

I will test yours and mine in B4i as I need it there.

 

[klaus]

I am sure that only
cbHelper.SetItems(Items)
works in all three platforms.
cmbBox is in:
- B4A a Spinner
- B4J a ComboBox
- does not exist
In B4i it is a Button with an ActionSheet.

 

[christianjeannot]

Ok.
I will see in my tests what is working best.
If necessary I can use the compiler directives #If B4A, #If B4i, #IfB4J.

Many thanks @klaus and @Eme Fibonacci for your help.