gilkesy
asked on
More "classy" questions
My functions and classes are increasing in complexity and I'm not sure how to tackle certain problems.
I have a form with 1 drop down list (called "Group Type") and 4 text boxes where people can enter the number of travellers for each age group.
Now I need to validate these text boxes in certain ways. For example I need to check that if a certain group type is chosen (for example "Couple") then there has be at least 2 adults specified in the text boxes.
I have created a function to validate all this:
Public Shared Function ValidTravellers(ByVal intAdult As Integer, ByVal intDependent As Integer, ByVal strGroupType As String, ByRef messageOut As String) As Boolean
Dim IsValid As Boolean = True
Dim intAll As Integer = (intAdult + intDependent)
If intAll = 0 Then
messageOut = "Please state how many people of each age group are travelling"
IsValid = False
Else
If strGroupType = "1" Then ' Group Type is Individual
If intAll > 1 Then
messageOut = "You have chosen cover for a single person but have requested cover for more than 1 person"
IsValid = False
End If
ElseIf strGroupType = "2" Then ' Group Type is Couple
If intAdult <> 2 Then
messageOut = "You have chosen couple cover but have not requested cover for 2 adults. The definition of couple is ""insured and partner living at the same address""."
IsValid = False
ElseIf intDependent <> 0 Then
messageOut = "You have chosen couple cover but have requested cover for children. If you require cover for children then please select the Family policy."
IsValid = False
End If
ElseIf strGroupType = "3" Then ' Group Type is Family
If intAdult <> 2 Then
messageOut = "You have chosen family cover but have not requested cover for 2 adults. The definition of family is 2 adults and 4 dependant children."
IsValid = False
ElseIf intDependent > 4 Then
messageOut = "You have chosen family cover but have requested cover for more than 4 children. The definition of family is 2 adults and 4 dependant children."
IsValid = False
ElseIf intDependent = 0 Then
messageOut = "You have chosen family cover but have requested cover for 0 children. The definition of family is 2 adults and 4 dependant children."
IsValid = False
End If
ElseIf strGroupType = "4" Then ' Group Type is Single Parent Family
If intAdult <> 1 Then
messageOut = "You have chosen single parent family cover but have not requested cover 1 adult. The definition of single parent family is 1 adult and up to 4 dependant children"
IsValid = False
ElseIf intDependent > 4 Then
messageOut = "You have chosen single parent family cover but have requested cover for more than 4 children. The definition of family is 2 adults and 4 dependant children"
IsValid = False
ElseIf intDependent = 0 Then
messageOut = "You have chosen single parent family cover but have requested cover for 0 children. The definition of family is 2 adults and up to 4 dependant children"
IsValid = False
End If
End If
End If
Return IsValid
End Function
I have to pass to this function the quantities of adults ("intAdult") and dependents ("intDependent").
To get these quantities I have to add together the contents of the textboxes, so I use the following 2 functions to do this:
Public Shared Function CountAdult(ByVal intUnder65 As Integer, ByVal intUnder70 As Integer, ByVal intUnder75 As Integer, ByVal intUnder81 As Integer, ByVal intUnder90 As Integer) As Integer
Return (intUnder65 + intUnder70 + intUnder75 + intUnder81 + intUnder90)
End Function
Public Shared Function CountDependent(ByVal intUnder18 As Integer, ByVal intUnder3 As Integer, ByVal intStudent As Integer) As Integer
Return (intUnder18 + intUnder3 + intStudent)
End Function
These 2 functions just add together the numbers specified in the text boxes.
However, if a text box is left empty then the code falls apart becuase the function needs a number for each variable.
So perhaps I need another function that checks whether the text box has a value and if it doesn't then assign it the quantity of 0. i.e.
If txtUnder65.Text = "" Then intUnder65 = 0
But then I'm kind of piling function on top of function and things are becoming increasing (and perhaps needlessly) complex.
I hope someone can understand this and point me towards the path of simplicity and enlightenment.
Regards
Stephen
I have a form with 1 drop down list (called "Group Type") and 4 text boxes where people can enter the number of travellers for each age group.
Now I need to validate these text boxes in certain ways. For example I need to check that if a certain group type is chosen (for example "Couple") then there has be at least 2 adults specified in the text boxes.
I have created a function to validate all this:
Public Shared Function ValidTravellers(ByVal intAdult As Integer, ByVal intDependent As Integer, ByVal strGroupType As String, ByRef messageOut As String) As Boolean
Dim IsValid As Boolean = True
Dim intAll As Integer = (intAdult + intDependent)
If intAll = 0 Then
messageOut = "Please state how many people of each age group are travelling"
IsValid = False
Else
If strGroupType = "1" Then ' Group Type is Individual
If intAll > 1 Then
messageOut = "You have chosen cover for a single person but have requested cover for more than 1 person"
IsValid = False
End If
ElseIf strGroupType = "2" Then ' Group Type is Couple
If intAdult <> 2 Then
messageOut = "You have chosen couple cover but have not requested cover for 2 adults. The definition of couple is ""insured and partner living at the same address""."
IsValid = False
ElseIf intDependent <> 0 Then
messageOut = "You have chosen couple cover but have requested cover for children. If you require cover for children then please select the Family policy."
IsValid = False
End If
ElseIf strGroupType = "3" Then ' Group Type is Family
If intAdult <> 2 Then
messageOut = "You have chosen family cover but have not requested cover for 2 adults. The definition of family is 2 adults and 4 dependant children."
IsValid = False
ElseIf intDependent > 4 Then
messageOut = "You have chosen family cover but have requested cover for more than 4 children. The definition of family is 2 adults and 4 dependant children."
IsValid = False
ElseIf intDependent = 0 Then
messageOut = "You have chosen family cover but have requested cover for 0 children. The definition of family is 2 adults and 4 dependant children."
IsValid = False
End If
ElseIf strGroupType = "4" Then ' Group Type is Single Parent Family
If intAdult <> 1 Then
messageOut = "You have chosen single parent family cover but have not requested cover 1 adult. The definition of single parent family is 1 adult and up to 4 dependant children"
IsValid = False
ElseIf intDependent > 4 Then
messageOut = "You have chosen single parent family cover but have requested cover for more than 4 children. The definition of family is 2 adults and 4 dependant children"
IsValid = False
ElseIf intDependent = 0 Then
messageOut = "You have chosen single parent family cover but have requested cover for 0 children. The definition of family is 2 adults and up to 4 dependant children"
IsValid = False
End If
End If
End If
Return IsValid
End Function
I have to pass to this function the quantities of adults ("intAdult") and dependents ("intDependent").
To get these quantities I have to add together the contents of the textboxes, so I use the following 2 functions to do this:
Public Shared Function CountAdult(ByVal intUnder65 As Integer, ByVal intUnder70 As Integer, ByVal intUnder75 As Integer, ByVal intUnder81 As Integer, ByVal intUnder90 As Integer) As Integer
Return (intUnder65 + intUnder70 + intUnder75 + intUnder81 + intUnder90)
End Function
Public Shared Function CountDependent(ByVal intUnder18 As Integer, ByVal intUnder3 As Integer, ByVal intStudent As Integer) As Integer
Return (intUnder18 + intUnder3 + intStudent)
End Function
These 2 functions just add together the numbers specified in the text boxes.
However, if a text box is left empty then the code falls apart becuase the function needs a number for each variable.
So perhaps I need another function that checks whether the text box has a value and if it doesn't then assign it the quantity of 0. i.e.
If txtUnder65.Text = "" Then intUnder65 = 0
But then I'm kind of piling function on top of function and things are becoming increasing (and perhaps needlessly) complex.
I hope someone can understand this and point me towards the path of simplicity and enlightenment.
Regards
Stephen
ASKER
Thanks for your mail.
Am I right in think that I can't use the class "MessageBox" as it is not available to asp.net.
Am I right in think that I can't use the class "MessageBox" as it is not available to asp.net.
MessageBox is not available in ASP.NET
Plus, you should not have UI elements like MessageBox in your code especially if it is for ASP.NET. There are better ways at logging things.
you are right...can't use messageBoxes in asp.net. i think that lables or so make a decent substitute given the limitations of asp.net.
but as far as your original problem....have you thought about creating a class library and incorporating it into your asp.net app? I think that way way...it provides a cleaner seperation of your presentation and business logic.
For example, in your class library, you create 4 different classes. the first class called Couple.
public class Couples
{
bool isValid = false;
//constructor
public Couples
{
}
//properties that take the input of your textboxes
public int PickYourPropertyName
{
get
{
}
set
{
if (value == 0)
isValid = false;
}
}
public bool IsValid()
{
if isValid == true
return true;
else
return false;
}
do the same for single, family etc.
and then in your client code (asp.net) you create an instance based on the ddl.
pseudo code:
if ddl.selectedIndex = 0 //couple was selected
//create an instance of your couple class
yourNameSpace.Couple myCouple = new yourNameSpace.Couple()
myCouple.FirstValue = 1;
myCouple.SecondValue = 2;
If myCouple.IsValid == true
//do your thing
code is defn. not complete...but I hope you get the idea of encapsulating all your business logic into your individual classes. should the complexity increase...it will only increase for only that given category (couple, famlity, singele ect)
but as far as your original problem....have you thought about creating a class library and incorporating it into your asp.net app? I think that way way...it provides a cleaner seperation of your presentation and business logic.
For example, in your class library, you create 4 different classes. the first class called Couple.
public class Couples
{
bool isValid = false;
//constructor
public Couples
{
}
//properties that take the input of your textboxes
public int PickYourPropertyName
{
get
{
}
set
{
if (value == 0)
isValid = false;
}
}
public bool IsValid()
{
if isValid == true
return true;
else
return false;
}
do the same for single, family etc.
and then in your client code (asp.net) you create an instance based on the ddl.
pseudo code:
if ddl.selectedIndex = 0 //couple was selected
//create an instance of your couple class
yourNameSpace.Couple myCouple = new yourNameSpace.Couple()
myCouple.FirstValue = 1;
myCouple.SecondValue = 2;
If myCouple.IsValid == true
//do your thing
code is defn. not complete...but I hope you get the idea of encapsulating all your business logic into your individual classes. should the complexity increase...it will only increase for only that given category (couple, famlity, singele ect)
yes, that's correct.
sorry for the confusion, i just wrote the code in a windows app as an example of how the code works.
but you can use the try ... catch for your purposes.
you could do something like
Public Shared Function CountDependent() As Integer
Dim n As Integer = 0
Try
n = Integer.Parse(txtUnder18.T
Catch ex As Exception
'badly formatted number - ignore it
End Try
Try
n += Integer.Parse(txtUnder3.Te
Catch ex As Exception
'badly formatted number - ignore it
End Try
Try
n += Integer.Parse(txtStudent.T
Catch ex As Exception
'badly formatted number - ignore it
End Try
Return n
End Function
i would say that is no real benefit of passing the parsed integers to a separate method to add them together, as you will make no savings by doing so.
if you write it as i have here (assuming that this method has access to the text boxes) then you only have to do 1 bit of processing in the calling function to get the result,
i.e.
'get the total number of dependants
Dim nDeps as Integer = CountDependent ()
rather than
'parse the text boxes
Dim nUnder18 as Integer = 0
Dim nUnder3 as Integer = 0
Dim nStudent as Integer = 0
...
'parsing code removed for brevity
...
Dim nDeps as Integer = CountDependent (nUnder18, nUnder3, nStudent)
m3
sorry for the confusion, i just wrote the code in a windows app as an example of how the code works.
but you can use the try ... catch for your purposes.
you could do something like
Public Shared Function CountDependent() As Integer
Dim n As Integer = 0
Try
n = Integer.Parse(txtUnder18.T
Catch ex As Exception
'badly formatted number - ignore it
End Try
Try
n += Integer.Parse(txtUnder3.Te
Catch ex As Exception
'badly formatted number - ignore it
End Try
Try
n += Integer.Parse(txtStudent.T
Catch ex As Exception
'badly formatted number - ignore it
End Try
Return n
End Function
i would say that is no real benefit of passing the parsed integers to a separate method to add them together, as you will make no savings by doing so.
if you write it as i have here (assuming that this method has access to the text boxes) then you only have to do 1 bit of processing in the calling function to get the result,
i.e.
'get the total number of dependants
Dim nDeps as Integer = CountDependent ()
rather than
'parse the text boxes
Dim nUnder18 as Integer = 0
Dim nUnder3 as Integer = 0
Dim nStudent as Integer = 0
...
'parsing code removed for brevity
...
Dim nDeps as Integer = CountDependent (nUnder18, nUnder3, nStudent)
m3
ASKER
How do I let the function (residing in a class file) have access to the text boxes in the form.
ASKER CERTIFIED SOLUTION
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typo
===
Return (message.Length = 0)
===
Return (message.Length = 0)
next,
Public Shared Function CountItems(ByVal ParamArray values() As String) As Integer
Dim value As Double = 0
Dim result As Double
For Each value As String In values
If Double.TryParse(text, Globalization.NumberStyles
value += result
End If
Next
Return CInt(value)
End Function
Public Shared Function CountItems(ByVal ParamArray values() As String) As Integer
Dim value As Double = 0
Dim result As Double
For Each value As String In values
If Double.TryParse(text, Globalization.NumberStyles
value += result
End If
Next
Return CInt(value)
End Function
hmm (slight typo)
============
Public Shared Function CountItems(ByVal ParamArray values() As String) As Integer
Dim value As Double = 0
Dim result As Double
For Each value As String In values
If Double.TryParse(value, Globalization.NumberStyles
value += result
End If
Next
Return CInt(value)
End Function
and you just call it like so
Dim adult As Integer = CountItems(txtUnder65.Text
Dim dependant As Integer = CountItems(txtUnder18.Text
============
Public Shared Function CountItems(ByVal ParamArray values() As String) As Integer
Dim value As Double = 0
Dim result As Double
For Each value As String In values
If Double.TryParse(value, Globalization.NumberStyles
value += result
End If
Next
Return CInt(value)
End Function
and you just call it like so
Dim adult As Integer = CountItems(txtUnder65.Text
Dim dependant As Integer = CountItems(txtUnder18.Text
ASKER
Thanks for such a detailed reply. Its all beginning to look too complicated for me but I guess this is the only way to learn.
One thing I notice though is that you have 3 functions sharing the same name "IsValidTravellers". Shouldn't different functions have different names?
One thing I notice though is that you have 3 functions sharing the same name "IsValidTravellers". Shouldn't different functions have different names?
well i would actually be tempted to parse the text in your page and pass the resulting integers to a class to do the validation (as below)
or you could pass each of the age group strings to the class for it to do the parsing
Public Class Cover
Private m_nAdults As Integer
Private m_nDependants As Integer
Public Sub New(ByVal nAdults As Integer, ByVal nDependants As Integer)
m_nAdults = nAdults
m_nDependants = nDependants
End Sub
Public Function IsValidAsSingle(ByRef strMessage As String) As Boolean
Dim bIsValid As Boolean = True 'assume valid
If (m_nAdults + m_nDependants) > 1 Then
strMessage = "You have chosen cover for a single person but have requested cover for more than 1 person"
bIsValid = False
End If
Return bIsValid
End Function
Public Function IsValidAsCouple(ByRef strMessage As String) As Boolean
Dim bIsValid As Boolean = True 'assume valid
If m_nAdults <> 2 Then
strMessage = "You have chosen couple cover but have not requested cover for 2 adults. The definition of couple is ""insured and partner living at the same address""."
bIsValid = False
ElseIf m_nDependants <> 0 Then
strMessage = "You have chosen couple cover but have requested cover for children. If you require cover for children then please select the Family policy."
bIsValid = False
End If
Return bIsValid
End Function
Public Function IsValidAsFamily(ByRef strMessage As String) As Boolean
Dim bIsValid As Boolean = True 'assume valid
If m_nAdults <> 2 Then
strMessage = "You have chosen family cover but have not requested cover for 2 adults. The definition of family is 2 adults and 4 dependant children."
bIsValid = False
ElseIf m_nDependants > 4 Then
strMessage = "You have chosen family cover but have requested cover for more than 4 children. The definition of family is 2 adults and 4 dependant children."
bIsValid = False
ElseIf m_nDependants = 0 Then
strMessage = "You have chosen family cover but have requested cover for 0 children. The definition of family is 2 adults and 4 dependant children."
bIsValid = False
End If
Return bIsValid
End Function
Public Function IsValidAsSingleParentFamil
Dim bIsValid As Boolean = True 'assume valid
If m_nAdults <> 1 Then
strMessage = "You have chosen single parent family cover but have not requested cover 1 adult. The definition of single parent family is 1 adult and up to 4 dependant children"
bIsValid = False
ElseIf m_nDependants > 4 Then
strMessage = "You have chosen single parent family cover but have requested cover for more than 4 children. The definition of family is 2 adults and 4 dependant children"
bIsValid = False
ElseIf m_nDependants = 0 Then
strMessage = "You have chosen single parent family cover but have requested cover for 0 children. The definition of family is 2 adults and up to 4 dependant children"
bIsValid = False
End If
Return bIsValid
End Function
End Class
m3
or you could pass each of the age group strings to the class for it to do the parsing
Public Class Cover
Private m_nAdults As Integer
Private m_nDependants As Integer
Public Sub New(ByVal nAdults As Integer, ByVal nDependants As Integer)
m_nAdults = nAdults
m_nDependants = nDependants
End Sub
Public Function IsValidAsSingle(ByRef strMessage As String) As Boolean
Dim bIsValid As Boolean = True 'assume valid
If (m_nAdults + m_nDependants) > 1 Then
strMessage = "You have chosen cover for a single person but have requested cover for more than 1 person"
bIsValid = False
End If
Return bIsValid
End Function
Public Function IsValidAsCouple(ByRef strMessage As String) As Boolean
Dim bIsValid As Boolean = True 'assume valid
If m_nAdults <> 2 Then
strMessage = "You have chosen couple cover but have not requested cover for 2 adults. The definition of couple is ""insured and partner living at the same address""."
bIsValid = False
ElseIf m_nDependants <> 0 Then
strMessage = "You have chosen couple cover but have requested cover for children. If you require cover for children then please select the Family policy."
bIsValid = False
End If
Return bIsValid
End Function
Public Function IsValidAsFamily(ByRef strMessage As String) As Boolean
Dim bIsValid As Boolean = True 'assume valid
If m_nAdults <> 2 Then
strMessage = "You have chosen family cover but have not requested cover for 2 adults. The definition of family is 2 adults and 4 dependant children."
bIsValid = False
ElseIf m_nDependants > 4 Then
strMessage = "You have chosen family cover but have requested cover for more than 4 children. The definition of family is 2 adults and 4 dependant children."
bIsValid = False
ElseIf m_nDependants = 0 Then
strMessage = "You have chosen family cover but have requested cover for 0 children. The definition of family is 2 adults and 4 dependant children."
bIsValid = False
End If
Return bIsValid
End Function
Public Function IsValidAsSingleParentFamil
Dim bIsValid As Boolean = True 'assume valid
If m_nAdults <> 1 Then
strMessage = "You have chosen single parent family cover but have not requested cover 1 adult. The definition of single parent family is 1 adult and up to 4 dependant children"
bIsValid = False
ElseIf m_nDependants > 4 Then
strMessage = "You have chosen single parent family cover but have requested cover for more than 4 children. The definition of family is 2 adults and 4 dependant children"
bIsValid = False
ElseIf m_nDependants = 0 Then
strMessage = "You have chosen single parent family cover but have requested cover for 0 children. The definition of family is 2 adults and up to 4 dependant children"
bIsValid = False
End If
Return bIsValid
End Function
End Class
m3
gilkesy, read the comments to decide which one to call. We have method overloading in VB.NET
ASKER
What does "method overloading" mean?
method overloading means that you can have more than one method with the same name on the condition that the method signatures do not match. A method signature is the arguments and the type
Public Sub DoMyMethod(ByVal name As String, ByVal number As Integer)
'do stuff
End Sub
Public Sub DoMyMethod(ByVal name As String)
DoMyMethod(name,0)
End Sub
which can be condensed in VB.NET to
Public Sub DoMyMethod(ByVal name As String, Optional ByVal number As Integer = 0)
End Sub
However, where the args do not really match in any way, overloading is pretty important
as in
Public Sub DoMyMethod(ByVal value As Integer)
End Sub
Public Sub DoMyMethod(ByVal value As Guid)
End Sub
Public Sub DoMyMethod(ByVal name As String, ByVal number As Integer)
'do stuff
End Sub
Public Sub DoMyMethod(ByVal name As String)
DoMyMethod(name,0)
End Sub
which can be condensed in VB.NET to
Public Sub DoMyMethod(ByVal name As String, Optional ByVal number As Integer = 0)
End Sub
However, where the args do not really match in any way, overloading is pretty important
as in
Public Sub DoMyMethod(ByVal value As Integer)
End Sub
Public Sub DoMyMethod(ByVal value As Guid)
End Sub
ASKER
Hi b1xml2
I've been going though your suggestion and I sort of think I understand what is going on. However there is a problem with "CountItems" function:
Public Shared Function CountItems(ByVal ParamArray values() As String) As Integer
Dim value As Double = 0
Dim result As Double
For Each value As String In values
If Double.TryParse(value, Globalization.NumberStyles
value += result
End If
Next
Return CInt(value)
End Function
I'm getting an error message that says:
"Variable 'value' hides a variable in an enclosing block"
Im passing the values to the function like this:
Dim adult As Integer = ValidationProcess.CountIte
Dim dependent As Integer = ValidationProcess.CountIte
I've been going though your suggestion and I sort of think I understand what is going on. However there is a problem with "CountItems" function:
Public Shared Function CountItems(ByVal ParamArray values() As String) As Integer
Dim value As Double = 0
Dim result As Double
For Each value As String In values
If Double.TryParse(value, Globalization.NumberStyles
value += result
End If
Next
Return CInt(value)
End Function
I'm getting an error message that says:
"Variable 'value' hides a variable in an enclosing block"
Im passing the values to the function like this:
Dim adult As Integer = ValidationProcess.CountIte
Dim dependent As Integer = ValidationProcess.CountIte
that is because you have defined value twice...
Dim value As Double = 0 'first definition
...
For Each value As String In values 'second definition
try naming them differently,
e.g.
dim dValue as Double = 0 'd denotes a double
...
For Each strValue As String In values 'str denotes a string
m3
Dim value As Double = 0 'first definition
...
For Each value As String In values 'second definition
try naming them differently,
e.g.
dim dValue as Double = 0 'd denotes a double
...
For Each strValue As String In values 'str denotes a string
m3
ASKER
Is there a problem in that:
The variable "value" is being assigned the value 0 (zero)
Then in a loop were assigning each value of the array to the variable "strValue".
But...
We are then adding together the contents of the "value" variable so were always going to get 0 (zero)
The variable "value" is being assigned the value 0 (zero)
Then in a loop were assigning each value of the array to the variable "strValue".
But...
We are then adding together the contents of the "value" variable so were always going to get 0 (zero)
ASKER
Its OK, I've realised the problem. This works OK:
Function CountItems(ByVal ParamArray values() As String) As Integer
Dim value As Double = 0
Dim result As Double
For Each strValue As String In values
If Double.TryParse(strValue, Globalization.NumberStyles
value += result
End If
Next
Return CInt(value)
End Function
Function CountItems(ByVal ParamArray values() As String) As Integer
Dim value As Double = 0
Dim result As Double
For Each strValue As String In values
If Double.TryParse(strValue, Globalization.NumberStyles
value += result
End If
Next
Return CInt(value)
End Function
ASKER
Also, one last thing:
The third function "IsValidTravellers" returns this:
Return (message.Length > 0)
However, this doesnt seem to work. When I changed the above to this it work:
Dim blnIsValid As Boolean = True
If (message.Length > 0) Then
blnIsValid = False
End If
Return blnIsValid
But I would have thought that just having "Return (message.Length > 0)" would return either true or false As the function returns a boolean value.
The third function "IsValidTravellers" returns this:
Return (message.Length > 0)
However, this doesnt seem to work. When I changed the above to this it work:
Dim blnIsValid As Boolean = True
If (message.Length > 0) Then
blnIsValid = False
End If
Return blnIsValid
But I would have thought that just having "Return (message.Length > 0)" would return either true or false As the function returns a boolean value.
yep, that is what i said in comment Date: 05/19/2005 10:55AM GMT
sorry gilkesy, that was in reference to your comment Date: 05/19/2005 11:46AM GMT
m3 :)
m3 :)
ack!!!
Public Shared Function CountItems(ByVal ParamArray values() As String) As Integer
Dim number As Double = 0
Dim result As Double
For Each value As String In values
If Double.TryParse(value, Globalization.NumberStyles
number += result
End If
Next
Return CInt(number)
End Function
Public Shared Function CountItems(ByVal ParamArray values() As String) As Integer
Dim number As Double = 0
Dim result As Double
For Each value As String In values
If Double.TryParse(value, Globalization.NumberStyles
number += result
End If
Next
Return CInt(number)
End Function
Integer.Parse(txtUnder65.T
if you are allowing a user to input text, it would be worth handling properly, because we all know what users are like
e.g.
Dim n As Integer = 0
Try
n = Integer.Parse(txtUnder65.T
Catch ex As Exception
End Try
try these code samples out...
Dim str As String
Dim n As Integer
Try
str = "sss"
n = Integer.Parse(str)
MessageBox.Show("string '" & str & "' as number " & n.ToString())
Catch ex As Exception
MessageBox.Show("number '" & str & "' was entered in an incorrect format")
End Try
Try
str = ""
n = Integer.Parse(str)
MessageBox.Show("string '" & str & "' as number " & n.ToString())
Catch ex As Exception
MessageBox.Show("number '" & str & "' was entered in an incorrect format")
End Try
Try
str = "123"
n = Integer.Parse(str)
MessageBox.Show("string '" & str & "' as number " & n.ToString())
Catch ex As Exception
MessageBox.Show("number '" & str & "' was entered in an incorrect format")
End Try
good luck,
m3