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... CONNECTIONS 1 13
Figure 5-4. Displaying OLE DB connection information
777Xch05final.qxd 11/18/06 3: 34 PM Page 1 13
Introducing Commands
Once you’ve established a connection to the database, you want to start ... Server to connect to
Figure 4-12. Specify SQL Server authentication
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Introducing Connections
Before you can do anything useful...
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... WOLZA’s city back to Warszawa and
deleting customer
zzz. Click Save Data to propagate the changes to the database.
Once again, you didn’t write any code to access
Customers, not even to perform navi-
gation ... new row. To keep things very simple, just enter zzz for both the customer
and company names. Change the city for customer WOLZA from
Warszawa to
Gdansk. Now click th...
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... USING STORED PROCEDURES 33 3
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Ho
w It Works
You use the MIN and MAX functions to find the minimum and maximum values, and you
use the
AVG function to calculate ...
F
igure 12-12.
CHAPTER 12 ■ USING STORED PROCEDURES 32 7
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Try It Out: Creating a St...
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... 15-8 to class Form1.
CHAPTER 15 ■ WORKING WITH ADO.NET EVENTS 39 3
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1. Insert the code in Listing 15-5 into the click event handler for the third button.
Listing ... infor
mation to the handler
:
CHAPTER 15 ■ WORKING WITH ADO.NET EVENTS396
777Xch15final.qxd 11/18/06 2 :34 PM Page 39 6
Listing 16 -3. Initialize Images Display in DisplayImages...
Beginning C# 2005 Databases From Novice to Professional phần 1 docx
... page count
BOOKS FOR PROFESSIONALS BY PROFESSIONALS
®
Beginning C# 2005 Databases:
From Novice to Professional
Dear Reader,
Thousands of C# programmers have become database professionals through
the ... Pedersen, and Jon Reid
Beginning
C# 2005
Databases
From Novice to Professional
CYAN
MAGENTA
YELLOW
BLACK
PANTONE 1 23 CV
ISBN 1-59059-777-X
9 781590 597774
5...
Beginning C# 2005 Databases From Novice to Professional phần 2 pot
... map to a
single C# type,
decimal (see Table 3- 8).
Table 3- 8. T-SQL Money Data Types
SQL Data Type C# Type Description
money decimal Values from -922 ,33 7,2 03, 685,477.5808 through
922 ,33 7,2 03, 685,477.5807
smallmoney ... database
.
CHAPTER 2 ■ GETTING TO KNOW OUR TOOLS 33
Figure 2-24. Database Explorer with no connections
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T...
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... a
bucket, ready to be filled with water, but it needs an external pipe to let the water in.
In other words, the dataset needs a data adapter to populate it with data and to sup-
port access to the data ... 1 53
Summary
In this chapter, you used data readers to perform a variety of common tasks, from sim-
ply looping through single result sets to handling multiple result sets....
Beginning C# 2005 Databases From Novice to Professional phần 5 doc
... optimal way.
■T
ip
In general,
tr
y to exploit SQL,
ra
ther than code C# procedures, to get the data you need from the
database. Database servers are optimized to perform selections and sorts, as ... utility to create a class for a typed dataset, it’s a lot of work, is subject to error, and
is something you’ll rarely (if ever) want or need to do. There’s little advantage to...
Beginning C# 2005 Databases From Novice to Professional phần 8 doc
... Exception");
}
CHAPTER 13 ■ HANDLING EXCEPTIONS342
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begin transaction
Add a customer
insert into customers
(
customerid,
companyname
)
values(@newcustid, ... the code to see
which
catch clause handles the exception.)
CHAPTER 13 ■ HANDLING EXCEPTIONS344
Figure 13- 6. Handling a SQL Server exception
777Xch13final.qxd 11/18/06 2 :36 PM Pag...
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... data, 435 – 437
overview, 434 – 435
RAW mode, 438 – 439
foreach statement, 471, 4 73
foreign keys, 264–265.
See also constraints
FROM clause, 446, 471
FROM keyword, 44
FULL OUTER joins, SQL, 31 1
■G
GetBoolean ... primary
keys
constructors, creating commands with,
116–117
content, 433
ControlBindingsCollection, 238
controlinfo empty element, 433
controls, synchronizing with data...
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