Visual Basic NET I Didn''''''''t Know You Could Do That phần 3 ppsx
Visual Basic .NET I Didn''''t Know You Could Do That phần 3 ppsx
... way is to wait
until the user clicks a file in the Treeview, then go back to the file system to
load the file date and time and display it. I decided this method might be a
bit difficult to implement, ... more properties that further describe each file,
such as hidden/read-only attribute information, the file extension, the
bitmap associated with this file type, and so on.
Using an Inheri...
Visual Basic .NET I Didn''''t Know You Could Do That phần 2 ppt
... until
you either found the comparison string, or got to the end of the original
string.
The instr function built into Visual Basic probably does the same thing,
albeit in some optimized fashion. ... second
string. Imagine that you had to write a Visual Basic replacement for the
instr function. You would start at the beginning of the string, compare it
to the comparison string,...
Perl I Didn''''t Know You Could Do That phần 3 ppt
... user (i. e., a matching user/password combination).
CGI TRICKS
80
application/x-shockwave-flash swf
application/x-stuffit sit
application/xml
application/zip zip
audio /32 kadpcm
audio /basic au ... au snd
audio/midi mid midi kar
audio/mpeg mpga mp2 mp3
audio/x-aiff aif aiff aifc
audio/x-pn-realaudio ram rm
audio/x-pn-realaudio-plugin rpm
audio/x-realaudio ra
audio/x-wav wav
chemical/x-pdb...
Perl I Didn''''t Know You Could Do That phần 1 pps
... form cgi internal
CGI TRICKS
68
Amazon stores your login information in a cookie, so that it knows who you
are; you may have noticed that whenever you visit the site it greets you by
name ... be quite complex. It won’t surprise you to know, though, that
a Perl module makes it all easier. That module is
CGI::Cookie
.
Cookie Components
Cookies consist of si...
Perl I Didn''''t Know You Could Do That phần 2 pps
... file you are returning. The specification is in the form of a MIME
(Multipurpose Internet Mail Extension) string. MIME is a set of standards
used on the Internet to identify file names, file ... contain the ses-
sion ID I ve used a field called
session in the sample scripts. If it exists,
use it in combination with the check_session_id function to verify the ses-
sion with the session ....
Biến và toán tử trong VISUAL BASIC.NET
...
9, 233 ,37 2, 036 ,854,775,807
Dim L as Long
L = 39 8889 034 3
Single 32 -bit (dấu
phảy động)
-3. 402823E38 đến 3. 402823E38 Dim Sg as Single
Sg = 899.99
Double 64-bit (dấu
phảy động)
-1.797 631 348623E308 đến ... Phạm vi Ví dụ
Short 16-bit -32 ,678 - 32 ,767 Dim S as Short
S = 12500
Integer 32 -bit -2,147,4 83, 648 đến 2,147,4 83, 647 Dim I as Integer
S = 4000
Long 64-bit -9, 233...
Gỡ lỗi (DEBUG) trong chương trình VISUAL BASIC.NET
...
gỡ l i.
1. Tìm kiếm và hiệu chỉnh l i
1.1. Các lo i l i
Có ba lo i l i thường xảy ra, gồm:
- L i cú pháp (Syntax Error): Còn được g i là l i biên dịch – Compiler error. L i này
do bạn gõ sai cấu ... L i logic: L i do tư duy sai dẫn đến kết quả sai v i dự kiến nó ph i như thế.
Khi gặp l i thực thi thì ta cần chú ý đến việc xử lý dữ liệu động nhập vào đúng và hợp lý.
Có rất...
Hướng dẫn lập trình Visual Basic .NET
... đầu viết thử một program Demo
B i 2
Visual Studio .NET
Visual Studio .NET
Để chạy VisualStudio .NET bạn cần ph i Set Time của Windows l i trước cu i tháng 7,2001,
eg: 1-July-2001.
Visual ... VB6 như Microsoft.Visualbasic.
Thay vì code:
Microsoft.Visualbasic.Left ( InputString,6)
ta tuyên bố:
Imports VB6= Microsoft.Visualbasic
Sau đó ta có thể code:
VB6.Left ( InputS...