retrieving new identity column values
Tài liệu Retrieving New Identity Column Values doc
Ngày tải lên :
21/01/2014, 07:20
... calling SCOPE _IDENTITY( ) in the previous example returns the
last identity value inserted into the Products table, which is the ProductID of the new
row.
N
ote For details on the SCOPE _IDENTITY( ) ... add a new DataRow to productsDataTable, the ProductID DataColumn of
your new DataRow will initially have the value -1. When you call the Update() method of
your SqlDataAdapter to push the new ... occur:
1. Your new DataRow is pushed to the database using the INSERT statement set in
myInsertCommand, with the ProductID column of the Products table being set to a
new identity value generated...
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Tài liệu Using the Get* Methods to Read Column Values doc
Ngày tải lên :
24/12/2013, 01:17
...
Using the Get* Methods to Read Column Values
Before I show you the other Get* methods that read column values, you need to know the
standard C# types and the values they support. You need to ... along with the underlying .NET type and the values that can
be stored in the C# type.
Table 9.3: STANDARD C# AND .NET TYPES
C#
TYPE
.NET
TYPE
VALUES
bool Boolean A Boolean true or false ... string GetString()
uniqueidentifier Guid GetGuid()
Note You can see the SQL Server types and the values supported by those types in Table
2.3 of Chapter 2, "Introduction to Databases."...
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Tài liệu Retrieving Stored Procedure Return Values Using a DataReader docx
Ngày tải lên :
24/12/2013, 05:15
... obtain a
return value.
[ Team LiB ]
[ Team LiB ]
Recipe 2.12 Retrieving Stored Procedure Return Values Using a DataReader
Problem
You are using a stored procedure to create ... retParam.Value + Environment.NewLine);
// Close the DataReader.
reader.Close( );
result.Append("After DataReader.Close( ), return value = " +
retParam.Value + Environment.NewLine);
// ... created
result.Append("After execution, return value = " + retParam.Value +
Environment.NewLine);
// Iterate over the records for the DataReader.
int rowCount = 0;
while (reader.Read(...
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Tài liệu Returning Strongly Typed Column Values doc
Ngày tải lên :
21/01/2014, 07:20
...
Returning Strongly Typed Column Values
Up to this point, you've retrieved column values from a DataReader only as generic
objects of the System.Object ... rewrite the while loop shown in the example in the previous section
to show how you
store column values as objects of the System.Object class:
while (productsSqlDataReader.Read())
{
object ... implicitly converted to a string and then
displayed.
That's fine for just displaying the column values, but what if you want to perform some
kind of calculation with a value? To do that,...
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Tài liệu Getting an Identity Column Value from SQL Server pptx
Ngày tải lên :
21/01/2014, 11:20
... AutoIncrement column should both be set to -1 to prevent conflict with the
positive identity values generated by the data source.
The values created for an AutoIncrement column will have new identity values ...
The SCOPE _IDENTITY( ) function was introduced in SQL Server
2000 to make it easier to work with identity values. While
SCOPE _IDENTITY( ) and @ @IDENTITY both return the last
identity value ... void IdentityValueForm_Load(object sender, System.EventArgs e)
{
// Create the Categories table.
dt = new DataTable(CATEGORIES_TABLE);
// Add the identity column.
DataColumn col = dt.Columns.Add(CATEGORYID_FIELD,...
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Tài liệu Retrieving Column Default Values from SQL Server pdf
Ngày tải lên :
24/12/2013, 05:15
... following the word column in the
constraint_type column.
Once the default constraints have been identified, the overloaded constraint_keys column
contains the default value for the column. The default ... DataAdapter returns schema information, it does not include the default values for
columns. You want to retrieve the default values of columns in a SQL Server table.
Solution
Use system stored procedures. ... the column.
For more information about the sp_helpconstraint system stored procedure, see Microsoft
SQL Server Books Online.
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[ Team LiB ]
Recipe 10.3 Retrieving Column...
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Brand Identity System Design
Ngày tải lên :
27/08/2012, 09:00
... phẩm quảng cáo
Brand Identity System | 43
top of mind
Brand Identity System | 49
simple
Brand Identity System | 20
PHÁT TRIỂN LOGO
JUMBO
Brand Identity System | 40
impact
Brand Identity System | ... đơn sắc trên nền màu : Logo sẽ dùng màu trắng.
Brand Identity System | 47
QUY CÁCH SẮP ĐẶT SLOGAN
Brand Identity System | 50
trang trí
4
Brand Identity System | 6
Lời nói đầu
Ngày nay tại Việt nam, ... định kích thước logo khi có slogan
sao cho phù hợp với logo chuẩn
Brand Identity System | 36
LOGO ĐƠN SẮC (1 MÀU)
Brand Identity System | 32
MÀU LOGO &
CÁC ỨNG DỤNG TRÊN NÊN MÀU (2)
• Lưu...
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NEW PHYSICAL OBJECT BASED GUI MODELING FEATURES
Ngày tải lên :
06/09/2012, 15:55
...
NEW FEATURES OF SAP2000 V8
I. N
EW
P
HYSICAL
O
BJECT
B
ASED
GUI M
ODELING
F
EATURES
New Physical Object Based Modeling Environment
New Parametric Templates ... Screen Nudging and Duplication of Objects
New Drawing Controls for Accurate Placement and Reshaping of Objects
New Comprehensive Customizable Toolbars
New General Skewed Intersecting Grid System ... Assignment Options
Several New Controls for Fast Creation of Line and Area Objects
User Controlled Object Based Internal Meshing of Frames, Shells and Solid Elements
New Options for Aligning,...
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