Android Question How to set a label.text with > 1 variable / Concatenate into 1 string?

tseyfarth · Mar 3, 2023

Hello all,

I'm trying to set a Labels text with a First Name and a Last Name. The following line of code crashes the app.

B4X:

lbl_welcome.Text =FName + " " + LName

However if I use only the FName OR the LName then it works. But never with both or with the space in between

B4X:

lbl_welcome.Text =FName
lbl_welcome.Text =LName

lbl_welcome.Text =FName + " " + LName  <== crashes
lbl_welcome.Text =FName + LName <== crashes

Also, I tried to concatenate the two variables into a string, but that also crashes

B4X:

Dim s As String
s = FName + LName  <== crashes

So obviously I am doing something wrong when trying to concatenate these. Any help would be greatly appreciated!
Thank you!

Tim

tseyfarth · Mar 3, 2023

Whoops! Found the answer. Use the ampersand (&) instead of the plus (+)

tseyfarth · Mar 3, 2023

Whoops! Found the answer. Use the ampersand (&) instead of the plus (+)

emexes · Mar 3, 2023

Maybe also remove (trim) extraneous space when only one name:

B4X:

s = (FName & " " & LName).Trim

tseyfarth · Mar 3, 2023

Good to know Emexes. In my case, the variables had already been trimmed but this can also make it easier.

Thanks,
Tim

udg · Mar 3, 2023

Just another way (search for Smart String Literal):

B4X:

Dim s As String = $"${FName} ${LName}"$
'or
MyLabel.Text = $"${FName} ${LName}"$
'and so on

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