Newbie ? - How do I get a sting's length? 1

[Trope]

I have a TEdit contol named userName on my form. When a button is pressed I am brought here:

void __fastcall TForm1::btnLoginClick(TObject *Sender)
{


}
//---------------------------------------------------------

I have tried the following (after many searches Google and this forum )

// Get the length of the username
string str = userName->text;
string::size_type len; \\ What is this anyways?
len = str.length();

anyways, that was the latest. I just want to see if userName > 8 charcaters. So frustrating...

Thanks,
Trope


PS. Also, I would really appreciate a quick explanation of this FASTCALL stuff if anyone would not mind.... thanks again

 

[Totte]

string str = userName->text; // The string is filled
string::size_type len; // This declares a variable with the name 'len'
len = str.length(); // The 'len' is set to the length of 'str'

You could also do:
if(userName->text.length() > 8)
{
// More than 8 char's in userName->text!
}
else
{
// Less than 9 char's in userName->text!
}

__fastcall is a declaration which defines a certain way of transfering parameters by the use of registers in stead of at memory stack.

Totte
Keep making it perfect and it will end up broken.

 

[Trope]

I am getting this error:

'text' is not a member of TEdit

Any suggestions?

Trope

 

[Trope]

I changed text to Text

ok still not working, now I am getting:

unable to convert ansistring to char *

I CANNOT believe I cant figure this out.

Trope

 

[Totte]

Somewhere you use the ANSIstring as a c-string.

To do that you must do:
userName->Text.c_str() // now it's a null-terminated standart c-string

Totte
Keep making it perfect and it will end up broken.

 

[Rached]

i don't get if you are using Edit control why you wanna go through converting AnsiString to string
any ways, this could be inside your login btnLoginClick

(userName is your Edit control name)

if(userName->Text.Length()>8)
{
//do whatever you want here
}