String append problems

[Theme]

GUIButtonLocation.Text = "talk to ".Append(locationname);
give me a error
why i cant do it? 

o/

[Etcher Squared Games]

It's in the manual, but it can be a bit confusing.
First of all....

Code: ags

SetText (button)
(Formerly known as SetButtonText, which is now obsolete)

Button.SetText(string newtext)

Changes the text displayed in the specified button to NEWTEXT.
Example: 

btnController.SetText("Enable jibble");

will change button btnController to read 'Enable jibble'.
See Also: Button.GetText, Button.NormalGraphic, Label.SetText

and you'll also want to use

Code: ags

StrCat
StrCat (string str1, string str2)

Appends STR2 to the end of STR1. 
Example: 

string name;
StrCopy(name,"My name is ");
StrCat (name,"Chris"); 

will result a string name which will be "My name is Chris".

so for your problem you'd do

Code: ags

string text;
StrCat(text, "talk to ");
StrCat(text, locationname);
GUIButtonLocation.SetText(text);

[Theme]

I know, but you used string type, I want to do it with String type
I resolved the problem in another way

but the problem is that
I can do this:

String lookat;
lookat = "look at "
lookat.Append(locationname);

and can't do this:

"look at ".Append(locationname);

o/

[monkey0506]

That's because anything between quotation marks (") is defined (internally) as a const string, not a String.  You could, however, do:

Code: ags

GUIButtonLocation.Text = String.Format("%s%s", "talk to ", locationname);

Also, Worm III, this is 2.71 code, not 2.7, so it's a wee bit different.

[Theme]

thanks for the help

o/

[monkey0506]

You're welcome...but I noticed that I did something kind of silly.  You could have just put:

Code: ags

GUIButtonLocation.Text = String.Format("talk to %s", locationname);

Instead of doing the "%s%s" thing...not much of a difference...but it's a bit simpler that way.  It will still do the same thing.