How can I display in a combobox the year of the date column that is not repeated?

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i have a combobox that gets the year of the column "Date", but the combo box displays all the year that is in the list,i just want to display the 2 different year

example

Date Column

11/16/2016
12/16/2016
1/12/2017
1/13/2017

the combobox displays like this

2016
2016
2017
2017

all i want to display the 2016 and 2017

how can i do that??
Thank you in advance for the response:)

What I have tried:

i have tried this code but it returns the above example
For i = 0 To index - 1
drDate(i) = dset.Tables("dr").Rows(i).Item(0)
drNo(i) = dset.Tables("dr").Rows(i).Item(1).ToString.Trim
credit(i) = CDbl(dset.Tables("dr").Rows(i).Item(2))
strDRdate(i) = drDate(i).ToString("MM/dd/yyyy")
If (strDRdate(i) = drDate(count).ToString("yyyy")) Then
cboYear.Items.Add(drDate(i).ToString("yyyy"))
End If
Next

Posted 19-Jul-17 15:49pm

Member 12374765

Updated 19-Jul-17 17:20pm

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Karthik_Mahalingam · Accepted Answer · 2017-07-19T17:17:00

Solution 1

check if the item is already preset in the combo box Items, Please verify the syntax

if(<>cboYear.Items.Contains(drDate(i).ToString("yyyy")) then
               cboYear.Items.Add(drDate(i).ToString("yyyy"))

Posted 19-Jul-17 17:17pm

Karthik_Mahalingam

Atlapure Ambrish · Accepted Answer · 2017-07-19T17:20:00

Instead of handling it in code behind before binding to combo box, the better approach is to use a separate query to get distinct years from the database and then bind to combo box.

Otherwise you can try below line query on your datatable to get distinct years.

Note: I have not verified this, just let me know in case it does not work.
var years = (from d in datatable where d.HasValue select Convert.ToDateTime(d.Value).Year).Distinct();