Simple yet important 4 questions about Visual Basic Studio 2012? - visual-studio-2010

Question

Guys I'm a student who knows simple stuff about Visual Basic Studio 2012 and who's working on creating an application for a course project. :)
I'm using ASP.Net Empty Website under Visual C#
If that makes sense. xD
Anyways, I have 4 important yet simple questions:
Q1: how do I apply Password Custom Vlaidation? For example 8 characters min in both the password and the password confirm text feild?
Q2: How do I apply "required" validation to a group of radio buttons, check boxes and a drop down list?
Q3: In a form, how do I get a list of radio buttons appear as options for once a customer picks a hair style category, however if she picks a make up categorty from the same drop down list, a whole different options appear? I hope it's clear lol
Q4: Is there a "range" tool in Visual Basic 2012 and how do I use it?
I appreciate every answer and so much thanks in advance. :D

Answer 1

For ASP.NET
Ans1:
Use RegularExpressionValidator instead of CustomValidator
Ans2:
Use RequiredFieldValidator with all the controls. And in the last use single ValidationSummary Control to display message. Here is link for you Understanding ASP.NET Validation Techniques
Ans3:
Use RadioButtonList control for options.
On SelectedIndexChange event of DropdownList control populate the RadioButtonList with relevant options.
Ans4:
Link in Ans2 will give you the RangeValidator control example.

Answer 2

I assume you are working in Winform.
And Since I am a C# developer I am posting my code in C#. you can use Telerik Code Converter to convert it to VB.NET
Ans1:
char[] charArray = s.ToCharArray();
int passwordCharacters = charArray.Length;
if (passwordCharacters < 8)
{
//Your code
}
Ans2:
Use ErrorProvider Control
Ans3:
There is no data bound RadioButtonList control in Winform. You will have to do it manually.
Ans4:
I don't think so there is any ASP.NET like Range Validator Control in VB.NET