Check if Textbox input is numeric

[angelica]

Hi ,

I am trying to check for a numeric input. I had this procedure in windows app and Im trying to put it in web but Im getting an error on
ctl.text in the code below

any ideas how I can correct this pleased.. Many thanks

Private Sub Submit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Submit.Click
        Dim bLoop As Boolean = True
        Do While bLoop = True
            bLoop = False
            Dim ctl As Control
            For Each ctl In Me.Controls   'checks to see if all required textboxes have been completed
                If [B]Trim([COLOR=RoyalBlue]ctl.Text[/COLOR]) [/B] = "" And TypeOf ctl Is TextBox Then
                     Msgbox("Please make entry for " & ctl.ID.ToString)
                    bLoop = True
                End If
            Next
            Select Case False    'check for numeric entry
                Case CheckNumeric(txtmobile.Text)
                    txtmobile.Text = Not (IsNumeric("Mobile"))
                    bLoop = True
                Case CheckNumeric(HomeTel.Text)
                    HomeTel.Text = Not (IsNumeric("HomeTel"))
                    bLoop = True
            End Select
        Loop

[Patch21]

I'm guessing its a build error? Its probably because the property "Text" does not belong to a generic control.

Rather than declaring ctl as a control, declare it as a textbox.

[angelica]

hi,

It's the case alright, clt.text is not a member.

Now I thought of insstead giving a message in a RequiredFieldValidator. I know you match it with the ControlToValidate. I need to know how to use them in something like this:

If Not ctl Is Nothing Then
                If ctl.Text.Length = 0 Then
                    (validator + ID).ToString.text = ("Please make entry for " & ctl.ID.ToString))
                End If

But its not the right syntax. can someone please correct me or guide for some insturctions on how it works.

Thanks

[mendhak]

Why aren't you doing this at design time, on the page itself?

[angelica]

Mendhak, I dont know how to use the blessed required field validation! and I also want to check if all my textboxes are null, how can I??

[mendhak]

Look at some tutorials.

http://www.devhood.com/tutorials/tut...tutorial_id=46

http://www.devarticles.com/c/a/ASP.N...tion-Controls/

[angelica]

Thanks for the info

[angelica]

Mendhak,

Those tutorials are very good. I have done a validation to my textboxes and they are working fine. There is two thing I need to clear but

1. How do I validate that its a valid email address ?

2. Since I have done these validations the data is not going into my database any longer. Am I missing something??

[aconybeare]

Angelica,

You can write a regular expression to validate your email addresses

or just look for the basic construsctors i.e. must contain the @ then a dot(.)
if you do a search on this forum or the web I'm sure you'll find some prewritten ones

showThread

[Lord_Rat]

The regular expression would look like:

[\w\_\.]+@[\w\_]+.(?:com|org|net)