itextsharp pdf to image c# : Add fillable fields to pdf control Library platform web page .net windows web browser 08-PHP-files2-part174

Exception example (cont.)
21
<?php
//create function with an exception
function checkStr($str)
{
}
//trigger exception in a "try" block
try
{
checkStr(“wrong”);
//If the exception is thrown, this text will not be shown
echo 'If you see this, the string is correct';
}
//catch exception
catch(Exception $e)
{
echo 'Message: ' .$e->getMessage();
}
?> 
PHP
Add fillable fields to pdf - C# PDF Field Edit Library: insert, delete, update pdf form field in C#.net, ASP.NET, MVC, Ajax, WPF
Online C# Tutorial to Insert, Delete and Update Fields in PDF Document
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Add fillable fields to pdf - VB.NET PDF Field Edit library: insert, delete, update pdf form field in vb.net, ASP.NET, MVC, Ajax, WPF
How to Insert, Delete and Update Fields in PDF Document with VB.NET Demo Code
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PHP larger example
!
Display a random quote of the day:
!
I don't know half of you half as well as I should like; and I like less 
than half of you half as well as you deserve. 
J. R. R. Tolkien (1892 -1973), The Fellowship of the Ring
!
I have not failed. I've just found 10,000 ways that won't work. 
Thomas A. Edison (1847 -1931), (attributed)
!
I am among those who think that science has great beauty. A 
scientist in his laboratory is not only a technician: he is alsoa child 
placed before natural phenomena which impress him like a fairy 
tale. 
Marie Curie (1867 -1934)
!
I love deadlines. I like the whooshing sound they make as they fly 
by. Douglas Adams
!
Statistics: The only science that enables different experts using the 
same figures to draw different conclusions. 
22
C# Create PDF Library SDK to convert PDF from other file formats
Create fillable PDF document with fields. creating a PDF document in C#.NET using this PDF document creating toolkit, if you need to add some text and
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C# PDF Text Box Edit Library: add, delete, update PDF text box in
Support to use C# source code to add text box to specified PDF position in C#.NET framework. Able to create a fillable and editable text box to PDF document in
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PHP cookies and sessions
23
CS380
VB.NET Create PDF from PowerPoint Library to convert pptx, ppt to
Add Password to PDF; VB.NET Form: extract value from fields; Convert multiple pages PowerPoint to fillable and editable PDF documents. Add necessary references:
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VB.NET Create PDF from Word Library to convert docx, doc to PDF in
Protect: Add Password to PDF; VB.NET Form: extract value from fields; Convert multiple pages Word to fillable and editable PDF documents. Add necessary references
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Cookies
!
Problem: HTTP is stateless
!
What is a cookie?
!
tiny bits of information that a web site could store 
on the client's machine
!
they are sent back to the web site each time a 
new page is requested by this client. 
CS380
24
VB.NET Create PDF from Excel Library to convert xlsx, xls to PDF
Add Password to PDF; VB.NET Form: extract value from fields; Create fillable and editable PDF documents from Excel in Visual Basic .NET Add necessary references:
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VB.NET Create PDF Library SDK to convert PDF from other file
Create fillable PDF document with fields in Visual Basic .NET application. Add necessary references: RasterEdge.Imaging.Basic.dll.
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Bad Cookies?
!
Urban myth: tracking, violate privacy
!
Reality: 
!
cookies are relatively harmless
!
can only store a small amount of information 
CS380
25
C# Create PDF from PowerPoint Library to convert pptx, ppt to PDF
Convert multiple pages PowerPoint to fillable and editable PDF documents. C#.NET Demo Code: Convert PowerPoint to PDF in C#.NET Add necessary references:
build pdf forms; changing font size in pdf form
C# Create PDF from Excel Library to convert xlsx, xls to PDF in C#
Create fillable and editable PDF documents from Excel in both .NET WinForms and ASP C# Demo Code: Convert Excel to PDF in Visual C# .NET Add necessary references
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Sessions
!
What is a session?
!
a combination of a server-side cookie and a 
client-side cookie, 
!
the client-side cookie contains only a reference to 
the correct data on the server. 
!
when the user visits the site:
!
their browser sends the reference code to the 
server
!
the server loads the corresponding data. 
CS380
26
C# Create PDF from Word Library to convert docx, doc to PDF in C#.
Convert multiple pages Word to fillable and editable PDF documents in both C#.NET Sample Code: Convert Word to PDF in C#.NET Project. Add necessary references:
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Cookies vs Sessions
!
Cookies can be set to a long lifespan
!
Cookies work smoothly when you have a 
cluster of web servers
!
Sessions are stored on the server, i.e. clients 
do not have access to the information you 
store about
!
Session data does not need to be transmitted 
with each page; clients just need to send an ID 
and the data is loaded from the local file. 
!
Sessions can be any size you want because 
they are held on your server, 
27
Create a cookie
28
setcookie(name, value, expire, path, domain); 
PHP
CS380
<?php
setcookie("user", “Harry Poter", time()+3600);
?>
<html>
..... 
PHP
Retrieve a Cookie Value
29
CS380
<?php
// Print a cookie
echo $_COOKIE["user"];
// A way to view all cookies
print_r($_COOKIE);
?> 
PHP
Delete a Cookie
30
CS380
<?php
// set the expiration date to one hour ago
setcookie("user", "", time()+3600);
?> 
PHP
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