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troubleshooting Question

throw error msgs when two appointments are at the same time

Avatar of siddhuoops
siddhuoops asked on
Visual Basic.NET
1 Comment1 Solution262 ViewsLast Modified:
Hello experts,

                     I need to create an application in VB .Net where the user will enter the reason to their appointment in a textbox and the time from a combo box. Upon entering the info and selecting a time, they enter these information through a button click event. I have two listbox where the first one stores the reason for the appointment and the second one stores the time. Now, I don't want them to enter two appointments at the same time. If they do so, I want to throw an error message saying "The appointment at this time already exists. Any help??

This is what I tried so far:

Under button1_Click event
{
     lstAppointment.Items.Add(txtAppointment.Text)
     lsttime.Items.Add(cboTimeInput.SelectedValue)
}

But i don't know know how would I check to throw an error message if they have two appointments at the same time.
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Avatar of Babycorn-Starfish
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