• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 178
  • Last Modified:

Filtering with figures

Hi,

Here's my problem:

My App Users have to enter a minimum age and a maximum age in 2 TextBoxes (respectively : txtAge1 and txtAge2)

Dim Age1 As String = txtAge1.Text
 
Dim Age2 As String = txtAge2.Text

I have a data field in my DataTable that is named "Age".  Therefore "Age" >= Age1 And  "Age" <= Age2 which reads (My code) :

If txtAge1.Text.Trim <> "" And txtAge2.Text.Trim <> "" Then
strFilter += "Age >= '" & txtAge1.Text & "' AND "
strFilter += "Age <= '" & txtAge2.Text & "'    '"
End If

The filter works fine except for certain values e.g. min 5 and max 25. It seems that this is due to the fact that these are STRING comparisons, which means 5 in higher than 25 because 5 > 2.

Does anyboduy know how to resolve this issue?

Thanks
0
Ghanisen
Asked:
Ghanisen
  • 3
  • 2
  • 2
  • +1
1 Solution
 
flavoCommented:
Dim Age1 As integer = cType(txtAge1.Text, integer)

Dave
0
 
flavoCommented:
Its gonig to throw a casting error if the user entered for exmple a though...  you'll need to handle that.

Maybe on the leave entent on the textbox have something like


If not IsNumberic(Me.txtAge1.text) then
  msgbox "Enter a number mate!"
   me.txtAge1.text = 0
end if

Idea??

Dave
0
 
J_MakCommented:
Try converting the String into an integer first before doing the comparisons, like:

Dim int_Age1 as Integer
Dim int_Age2 as Integer

int_Age1 = CInt(Val(txtAge1.Text))
int_Age2 = CInt(Val(txtAge2.Text))

Hope that helps!
0
Get expert help—faster!

Need expert help—fast? Use the Help Bell for personalized assistance getting answers to your important questions.

 
GhanisenAuthor Commented:
Hi flavo, and J Mak,

Thanks for the suggestions. I had already tried that (converting to integer) but it did not work for one simple reason:

RowFilter is a string and at the end of the day the values converted to integer have to be converted back to string values ans are processed as such in the filtering.

This is a tough issue and I'll try this morning to use an SQL query to filter directely from the database.

Keep on searching please and thanks for your efforts.


0
 
Corey ScheichDeveloperCommented:
Since it is a string filter then you have to have the same number of characters to have a proper numeric comparison.

to handle this try this

Dim Age1len as long
Dim Age2len as long

age1len = len(txtage1.text)

age2len = len(txtage2.text)

while age1len < age2len
     txtage1.text = "0" txtage1.text
     age1len = len(txtage1.text)
wend

'then your comparison

regards,
Corey
0
 
Corey ScheichDeveloperCommented:
seems i missed an "&" in this line.

txtage1.text = "0" & txtage1.text
0
 
GhanisenAuthor Commented:
Hi Corey,

You gave me a fantastic solution far better than the one I have found:

If txtAge1.Text <> "" Then
            If txtAge1.Text.Length <> 2 Then
                MsgBox("The minimum and maximum age must both be included between 10 et 99 years!")
                txtAge1.Focus()
            Else
                Exit Sub
            End If
End If

Since my users are adults, my solution works but your's is so elegant that I'm in deep admiration.

Corry you really deserved your 500 points. Many thanks
0
 
Corey ScheichDeveloperCommented:
My pleasure.
Thank you for your kind words.

Corey
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Cloud Class® Course: Python 3 Fundamentals

This course will teach participants about installing and configuring Python, syntax, importing, statements, types, strings, booleans, files, lists, tuples, comprehensions, functions, and classes.

  • 3
  • 2
  • 2
  • +1
Tackle projects and never again get stuck behind a technical roadblock.
Join Now