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I have a .aspx page(vb) that allows someone to book an appointment. &nbsp;It also has a rebooking option. <br />
<br />
This works fine but I want to now make sure that an appointment cannot be rebooked at a date past the next scheduled appointment.<br />
<br />
EG<br />
<br />
2 Appointments<br />
<br />
12 March<br />
20 April <br />
<br />
When I rebook the 12 March appointment I don't want to allow the new appointment to be after the next appointment on 20th April<br />
<br />
Suggestions on the best way to do this?
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I have a .aspx page(vb) that allows someone to book an appointment.  It also has a rebooking option. 

This works fine but I want to now make sure that an appointment cannot be rebooked at a date past the next scheduled appointment.

EG

2 Appointments

12 March
20 April 

When I rebook the 12 March appointment I don't want to allow the new appointment to be after the next appointment on 20th April

Suggestions on the best way to do this?

Appointment Rebooking Asp.Net

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ASP.NET

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.NET Programming

Visual Basic .NET (VB.NET) is an object-oriented programming language implemented on the .NET framework, but also supported on other platforms such as Mono and Silverlight. Microsoft launched VB.NET as the successor to the Visual Basic language. Though it is similar in syntax to  Visual Basic pre-2002, it is not the same technology,