refresh combo box in c#

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hi i have 3 comboboxes that each of them selects special data. when i press on combobox1, it has 2 object! one is selected. according to this selection, i can select special data on combobox2 that is different with others! when i select on other value of combobox1, the values of combobox2 is deleted on combobox2.
i wrote:

C#

if (comboBox44.SelectedIndex == 0)
            {
                S_DRV_Byte26 = (byte)(S_DRV_Byte26 | 0x00);
                comboBox43.Items.RemoveAt(2); comboBox43.Items.RemoveAt(2);
            }
            else
            {
                S_DRV_Byte26 = (byte)(S_DRV_Byte26 & 0xff);comboBox43.Refresh();
            }

how can i refresh comboboxes to select from first?

Posted 10-Nov-13 19:54pm

mohsenvasefi

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Orcun Iyigun 11-Nov-13 2:35am

Just to make sure? Can you please tell us if it is a WinForms, Web, WCF..etc?

mohsenvasefi 11-Nov-13 2:45am

it's a winForm. in combobox44, when i select value 0, two data on combobox43 is removed! when select other value of combobox44, i need to comeback all of data

agent_kruger 11-Nov-13 5:57am

i cannot figure out your question correctly .
But if you want to force the combobox to display data
write :- combobox1.Refresh()

mohsenvasefi 11-Nov-13 6:30am

what about hide value on combobox instead of remove?

agent_kruger 11-Nov-13 6:49am

how to hide values in combobox

mohsenvasefi 11-Nov-13 7:09am

this is my problem! i don't know how can i do this!

agent_kruger 11-Nov-13 7:10am

you cannot but you can set different datasource to combobox

mohsenvasefi 11-Nov-13 7:36am

and how? could you explain more for me?

2 solutions

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**Orcun Iyigun** · Answer 1 · 2013-11-11T05:33:00

Solution 3

Here is a link which explains how cascading combobox in c# works:
Cascading ComboBox In Winforms[^]

Good luck,,
OI

Posted 11-Nov-13 5:33am

Orcun Iyigun

Updated 12-Nov-13 3:34am

v2

agent_kruger · Answer 2 · 2013-11-11T02:15:00

Solution 2

yes you can by calling the second set of code at selectionCommitedchange of combobox

Posted 11-Nov-13 2:15am

agent_kruger

Comments

mohsenvasefi 11-Nov-13 8:28am

no, it doesn't work well!

agent_kruger 11-Nov-13 8:30am

how can you post the code

Orcun Iyigun 11-Nov-13 11:32am

Use the "Improve solution" button or reply to his comment by using reply button!

agent_kruger 12-Nov-13 5:36am

that's what i just did

Orcun Iyigun 12-Nov-13 9:36am

No you didn't. Obviously you clicked to Add a solution. thats why you have 2 answers. If you clicked Improve button you would have a "v2" like on my answer. Just to show you I added extra comma after good luck to show it is done.

agent_kruger 12-Nov-13 9:38am

ok sorry

refresh combo box in c#

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refresh combo box in c#

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