[2005] Hi ppl - Open dir [RESOLVED]

[Bruno Frade]

hi all...

i have a form With:
Button1
listbox1
listbox2

wath i need is wen i click my button open the thir:

("C:\Programs\ "+ listbox1.Selecteditem) ---- this work fine

but if i need

("C:\Programs\" + listbox1.selecteditem + listbox2.selecteditem )


supose i have a selected item in listbox1 -- EXP and i have other in listbox2 -- TEXT.txt, wen i click button1 i need this result:

open ("c:\Programs\EXP\TEXT.txt)

[jmcilhinney]

You simply need to concatenate with an additional "\" between the two list box items. Alternatively you could use the String.Format method, or even IO.Path.Combine twice.

[staticbob]

Something like this....

("C:\Programs\" & listbox1.selecteditem & "\" & listbox2.selecteditem)

Bob

[Bruno Frade]

tks for all, but can you explain in a few words the diference between

("C:\Programs\" + listbox1.selecteditem)

and

("C:\Programs\" & listbox1.selecteditem)

just to learn...

txk bie
Bruno Frade

[staticbob]

+ is a math operator, used for addition.
& is a text operator.

I think, but I'm sure JMC will be more concise.... very shortly....

[jmcilhinney]

"+" is the addition operator while "&" is the concatenation operator.

"str1" + "str2" = "str1str2"
"str1" & "str2" = "str1str2"
1 + 2 = 3 -> The number 3
1 & 2 = "12" -> A string
"str1" + 2 -> Unhandled Exception: Cannot convert String to Integer
"str1" & 2 = "str12"

[Bruno Frade]

ok, tkx very much

congratz to VBForums, and for all members..

[jmcilhinney]

And...

"10" + 2 = 12 -> The number 12

Basically, "+" will concatenate if both operands are strings but otherwise will try to convert to Double if the operands are different types. If the string can be converted to a Double then it is, otherwise an excpetion is thrown. "&" will convert both operands to type String by calling their ToString method no matter what the type of either operand.

[staticbob]

^^^ Told ya !

I think, but I'm sure JMC will be more concise.... very shortly....