read from SQL to Button - vb.net

Question

please help on this issue, i want to read ID from SQL to different button but still i cant able to do it. please help.
this is the code i tried.
this code read same ID in both button instead of different id in different button. see the screenshot for your reference.
Dim dt As New DataTable
Dim da As New SqlDataAdapter("select Locker_ID from Locker", colnnn)
da.Fill(dt)
For Each row As DataRow In dt.Rows
Button2.Text = row.Item("Locker_ID")
Button1.Text = row.Item("Locker_ID")
Next

Answer 1

You do not only have to loop the rows but also the buttons. If you have 2 locker rows, your loop executes the loop body twice. I.e., the first locker id is assigned to both buttons and then the second locker id is assigned to the same buttons again, overwriting the first value.
Dim dt As New DataTable
Dim da As New SqlDataAdapter("select Locker_ID from Locker", colnnn)
da.Fill(dt)
Dim i As Integer = 1
For Each row As DataRow In dt.Rows
Controls("Button" & i).Text = row.Item("Locker_ID")
i = i + 1
Next
This will assign the first Locker_ID to Button1, the second one to Button2, etc.
The Controls collection allows you to access the controls by name by using a string as index.
Note that you can change the name of the buttons. If you name the buttons where you want to have the locker id as btnLocker1, btnLocker2, btnLocker3 etc. then Controls("btnLocker" & i).Text = row.Item("Locker_ID") will automatically select the right buttons.
It is advisable to give your controls speaking names. Also, do this before creating event handlers. E.g., nobody knows what Sub Button17_Click is supposed to do; however, if you name the button btnPrint, the winforms designer will automatically create a Sub named btnPrint_Click when you double click the button.
See also: For Each Loops