How to show related combo boxes c# forms

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Good day

I have two Comboboxes one is for Item and the Other is for Type.Now in Item i have 3 things Air, Road ,Sea in type i have

JetG5,Dreamliner,AirBus,Mercedes,Madza,Toyota,submarine ship and boat e.t.c

Now ,How when i choose Air i want JetG6,Dream liner only to appear and when I choose road Air ,Road ,Sea to appear

how do i do this?

Posted 10-Jun-14 13:44pm

Govera Nissi Tawanda

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[no name] 10-Jun-14 20:26pm

Well the normal way would be to query a database and select the items out of the database corresponding to the Type by whatever criteria you have setup. Your current criteria makes no sense to me. If you read what you wrote, it probably would not make sense to you either. Research "cascading comboboxes".

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2014-06-10T15:10:00

I assume that all the ComboBoxes are loaded initially.

Now handle the ComboBox.SelectedIndexChanged Event[^]. Inside the event, see what is the selected value. Decide what needs to be removed from the other ComboBox.

Now, to remove the item from other ComboBox, do like below...

C#

// To remove "Tokyo" item:
comboBox1.Items.Remove("Tokyo");

Refer - How to: Add and Remove Items from a Windows Forms ComboBox, ListBox, or CheckedListBox Control[^]

Peter Leow · Answer 2 · 2014-06-10T18:18:00

Solution 2

Check this out: c-sharp-combobox-options-dependent-on-another-combobox[^]

Posted 10-Jun-14 18:18pm

Peter Leow