I can't find a clear answer to this problem. What am I doing wrong
I am having problems writing this piece of code. it is supposed to be a customized function that has within it another function. It is supposed to see if content is Non Numeric. If it is non numeric, a messagebox is displayed, if it is not the message box is not activated, and the software continues to the next argument.
Here is a sample of the code:
Function TextIsNotNumeric(ByVal txtBox As TextBox) As String
If Not IsNumeric(txtBox) Then
MessageBox.Show("input is Not Numeric - Re enter")
End If
End Function
'and this part is where I call the code in the main program
Private Sub btnAddTOState_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddTOState.Click
TextIsNotNumeric(txtVotes)
End Sub
Putting a function into another function
Skipping Rock
Nikita Mironov
It helps if you tell us what error messages you are getting. Here is a quick form I wrote:
Public
Class Form1 Sub TextIsNotNumeric(ByVal txtBox As TextBox) If Not IsNumeric(txtBox.Text) ThenMessageBox.Show(
"input is Not Numeric - Re enter") End If End Sub Private Sub btnAddTOState_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddTOState.ClickTextIsNotNumeric(txtVotes)
End SubEnd
Classbbaldwinwa
You cannot create a function within a function. This is not a valid action.
You can call a function from with a function - this is a perfectly valid action.
If your method does not need to return any values then you can use a Sub
Sub Bar
msgbox("hello")
End Sub
However, If you want to return a value from you method then on you method you would use function similar to the following
Function foo() as boolean
'<You Code>
Return True
End Function
This has a boolean return type and is set to return a value of true, of course you can use different types other than boolean.
JDELUNA
My intention was to create a function inside of a function and to return a value for the True and the false. However, after I plugged this thing in as a private sub, in this particular case, it really made not difference.
So to return a value in a function would it be as simple as just putting the word "return" at the end of the function argument to get the little green line to disappear
snowrabbit
You are right In this particular case the program did not care if it came from a private sub or a function.
I can plug it into a program like a function that returns a value. Unless I were trying to add up the trues and falses, does it make any difference in this case is there any advantage to using the function feature in this case
Shajeel
When not returning a value from your function you should use a Sub instead
The little green line is telling you that the function does not return a value on all paths.....if it is your intention only to show a message box then use the sub....if you are wanting to reurn a value ie (true or false) whether or not the textbox value is numeric then you need to use a function and give it a return value
joynerCN
Now the argument works almost perfectly, except there is a little green line underneath the
End Function (This example does not have the green line underneath it. )
Otherwise the added term .text fixed most everything.
If I run into other problems I will be sure and send out another SOS. Thanks much!