How to obligate choose values in combobox by number order C#

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Hi all!
I have a combobox with array (24,01,02,03,04,05). I want to user Obligatory choose the first value in the combobox (as this example is 24) then could continue choose next number.
I thought i must use Check selected value with SelectedItemchange in Combobox.

But i don't clear how to code.
So, please help me how to do this task!

Thanks you!

What I have tried:

How to obligate choose values in combobox by number order C#

Posted 28-Nov-17 17:45pm

C Sharp coder 2018

Updated 28-Nov-17 18:36pm

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Patrice T · Answer 1 · 2017-11-28T18:25:00

Quote:
I have a combobox with array (24,01,02,03,04,05). I want to user Obligatory choose the first value in the combobox (as this example is 24) then could continue choose next number.

The principle of combobox is to give user a choice in array.
Why do you want to use a combobox if there is no choice?
Just split the value you want, no user input.

C Sharp coder 2018 · Answer 2 · 2017-11-28T18:36:00

Solution 2

yes, that right! But user sometime forget choose the first values make me missing Primary key from another table.

I want they will choose values as sequency array.

Posted 28-Nov-17 18:36pm