Multiple combobox with same items. When one selected other must be unable to select same item.

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I have Five comboBoxes with same members, when one combobox selects an item, other comboboxes must be unable to select same member.
anyone have solution for this.? help me.

What I have tried:

dont have any idea about this.

Posted 10-Jul-17 3:13am

Parekh Vaibhav

Updated 11-Jul-17 15:39pm

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Joezer BH 10-Jul-17 9:31am

What do you need?
If you have not tried anyting it meens, first, learn to program in C#...

Andy Lanng 10-Jul-17 9:38am

5* comment!

Richard Deeming 10-Jul-17 11:55am

The answer to your question will vary greatly depending on which UI framework you're using.

Is this Windows Forms? WPF? ASP.NET? ASP.NET MVC? ASP.NET Core? Something else?

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RickZeeland · Answer 1 · 2017-07-10T09:28:00

Solution 1

In Winforms you can use a DataGridView instead of a ComboBox and make the row readonly, see example here: C# DataGridView Read Only Columns and Rows[^]
Here is a way to do it with a standard ComboBox: c# - Disabling particular Items in a Combobox - Stack Overflow[^]

Posted 10-Jul-17 9:28am

RickZeeland

Updated 10-Jul-17 9:36am

v2

Atlapure Ambrish · Answer 2 · 2017-07-10T19:46:00

As you have mentioned ComboBox, I assume you are working on a windows application. Here's the solution.

Create different binding methods to bind data to comboboxes. Then on SelectedIndexChanged event of each combobox you need to remove item(s) you don't want from other comboboxes. To do this you can use RemoveAt() method if you are dealing with List or any similar kind of objects. After removing the items rebind the combobox to bind updated list.

Joshua Sahagun · Answer 3 · 2017-07-11T15:39:00

Assuming that they have the same indexes (because definitely, they do), you can try the following:

1. Create a List or Array that will hold all the selected index every time you select item in the ComboBox and use it to check if the item is already selected from another ComboBox.

Or if you don't want to use List or Array,

2. Use those ComboBoxes itself to check the selected items.

You can just display a Message (ex: MessageBox) or just remove the already selected item/s from other ComboBoxes so that it cannot be selected again.

Multiple combobox with same items. When one selected other must be unable to select same item.

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