Compare array to database and change matching elements - vb.net

Question

I am working on a hospital database and I am loading hospital beds to combobox. What I want to do is, if bed is already taken, I want to add (Occupied) after id of bed.
There is a room and bed list table. Room 101 has Three beds. 1001, 1002 and 1003. I have loaded Bed_No to an array. bed_ids_array()
There is a Patient-Bed Occupied table. As you can see 1002 and 1003 are occupied by patients. I read this data through while loop dr(1)
I am adding data to combobox in vb.net and it should look like this:
But it looks like this:
(when rechecking with different values same data comes when data is being read from access database)
The code I have used is this:
'Check if beds in array have patients
Call connect()
con.Open()
cmd = New OleDbCommand("Select * from Bed_to_Patient_Relation", con)
dr = cmd.ExecuteReader
While dr.Read
'Add all occupied stuff to combobox first
For i = 0 To room_bed_count - 1
'take first bed id and check all database
If bed_ids_array(i) = dr(1) Then
Cmbbx_Beds.Items.Add(bed_ids_array(i) & "Occupied")
Else
Cmbbx_Beds.Items.Add(bed_ids_array(i))
End If
Next
End While
What I want to do is to add "Occupied" to text if match is found, else, just enter normally

Answer 1

I suggest making a few changes. Ditch the combobox for a datagridview. You can still select the row you want, but have better visibility of the data. Join your two tables in the query to identify which beds are available or occupied. Include the bed and room id in the patient to bed relationship table, or better yet, assign a unique id for each bed. An occupied table may allow for a more effective join.
The issue I think you have with existing code is that you're adding the list twice, or not clearing it after each reload of the box. I find it much more efficient to populate a grid based on data from a query, such as the join mentioned above.
probably not the answer you were looking for.