passing null values to parameters
Tài liệu Passing Null Values to Parameters ppt
Ngày tải lên :
14/12/2013, 18:16
... [ Team LiB ]
Recipe 2.14 Passing Null Values to Parameters
Problem
You need to pass a null value to a parameter.
Solution
Use the System.DbNull.Value static value.
The sample ... System.DBNull.Value using an equality operator.
If the stored procedure accepts optional parameters parameters for which a default
value is specified—you can set these parameters to null in C# or Nothing in ...
set by passing System.DBNull.Value for the value argument when constructing the
parameter or by setting the Value property of the Parameter object to
System.DBNull.Value.
To test for a null...
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Tài liệu Filtering for Null Values pptx
Ngày tải lên :
14/12/2013, 18:16
... default view to the grid.
dataGrid.DataSource = dt.DefaultView;
}
private void filterButton_Click(object sender, System.EventArgs e)
{
String filter = SHIPREGION_FIELD + " IS NULL& quot;; ... filtered for rows containing a null ShipRegion field. The result of
applying the filter is immediately reflected in any controls bound to the DataView object
in addition to the any operations performed ... filterButton.Text = "Remove Filter";
}
else
{
// Remove the filter.
dv.RowFilter = "";
dataGrid.CaptionText = "Orders table: no filter.";
filterButton.Text...
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Tài liệu Replacing Null Values in a Strongly Typed DataSet ppt
Ngày tải lên :
14/12/2013, 18:16
...
Use annotations in the XML schema to control the handling of null values.
The sample uses one XSD file:
CategoriesDS_AnnotatedNull.xsd
The schema used to generate the strongly typed DataSet. ... case, data is loaded into the DataSet. A row is added to the
Categories table with a Description value of null. The data in the table is written to the
text box on the form to demonstrate the effect ... ConfigurationSettings.AppSettings["Sql_ConnectString"]);
if (annotatedRadioButton.Checked)
{
// Create the typed DataSet without null annotation.
CategoriesDS_AnnotatedNull ds = new CategoriesDS_AnnotatedNull( );
// Fill the Categories...
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Tài liệu Reading Null Values doc
Ngày tải lên :
21/01/2014, 07:20
... UnitPrice column contains a null value
As mentioned, a Sql* type can store a null value. A null value is stored as Null. For
example:
SqlMoney unitPrice =
productsSqlDataReader.GetSqlMoney(unitPriceColPos); ...
unitPrice = Null
Each of the Sql* types also has a Boolean property named IsNull that is true when the
Sql* object contains a null value. For example:
Console.WriteLine("unitPrice.IsNull = ...
Console.WriteLine("unitPrice.IsNull = " + unitPrice.IsNull);
This example displays:
unitPrice.IsNull = True
True is displayed because unitPrice contains Null.
...
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Be A Leader for God’s Sake -- From values to behaviors doc
Ngày tải lên :
07/03/2014, 19:20
... he would revert to his buffalo
values and tactics and turn back into a buffalo and crash to
the ground. I described this book to my staff and committed
myself to continue to work on the transformation, ... interact with their
families and to not get the rest that they needed. I found
myself trying to get employees to leave. I would stop by on
Saturday or Sunday to get something that I had left ... employ men and hire hands to work for
you. But you must win their hearts to have them
work with you.”
Florio
To love means to commit oneself without
guarantee, to give oneself completely...
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Tài liệu Using the Get* Methods to Read Column Values doc
Ngày tải lên :
24/12/2013, 01:17
... 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 know these ... 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 ... approximately +/-1.7 *10
308
with 15 to 16 significant
figures of precision.
float Single A 32-bit floating-point number between approximately +/-1.5 *10
-
45
to approximately +/-3.4 *10
38
with...
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Tài liệu Adding Parameters to functions docx
Ngày tải lên :
24/12/2013, 07:17
... used to
allow channels to be changed only if tvPower is true. The function then sets a
variable used to store the current channel of the television to the value of the
parameter value sent to ... weightOnMoon variable's being set to a different
value as well. Take a look at these function calls to the convertToMoonWeight()
function:
convertToMoonWeight(190);
convertToMoonWeight(32); ... functionality to the numeric keypad on the remote control and
to the TV channel Up and Down buttons, allowing them to change the channel displayed
on the TV screen. The numeric buttons work by...
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Tài liệu Supplying Parameters to Commands pptx
Ngày tải lên :
21/01/2014, 07:20
...
FROM Customers
WHERE CustomerID = @CustomerID
UPDATE Customers
SET CompanyName = @CompanyName
WHERE CustomerID = @CustomerID
DELETE FROM Customers
WHERE CustomerID = @CustomerID
Let's ... statement, you need to add the actual
parameters to the SqlCommand object-and you'll do that in the next step.
Step 2: Add Parameters to the Command Object
To add parameters to your Command ... row to the Customers table was:
INSERT INTO Customers
CustomerID, CompanyName
) VALUES
'J3COM', 'Jason Price Corporation'
)
As you can see, the values for the CustomerID...
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Tài liệu Using Expression Columns to Display Aggregate Values pptx
Ngày tải lên :
21/01/2014, 11:20
... Columns to Display Aggregate Values
Problem
You want to add summary information such as averages, sums, and counts to a table
based on related child rows.
Solution
Use expression columns to perform ...
added to the Order Details table to calculate the extended price for each row. Aggregate
values for the total extended price of the order and the number of Order Detail rows are
added to the ... the line total.
orderDetailTable.Columns.Add("OrderDetailTotal", typeof(Decimal),
"(Quantity * UnitPrice) * (1-Discount)");
// Create the OrderDetails aggregate values in...
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Tài liệu Using Expression Columns to Display Calculated Values pptx
Ngày tải lên :
21/01/2014, 11:20
... sort.
if(sortNoneRadioButton.Checked)
dv.Sort = "";
else if(sortAscRadioButton.Checked)
dv.Sort = "ExtendedPrice";
else if(sortDescRadioButton.Checked)
dv.Sort = ... "DataColumn.Expression Property" topic in the MSDN
Library.
An expression column is added to a table either through one of the DataColumn
constructors that take the expression for the ... object.
dv = dt.DefaultView;
// Bind the DataView to the DataGrid.
resultDataGrid.DataSource = dv;
}
private void applyButton_Click(object sender, System.EventArgs e)
{
bool isLowerBound...
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Báo cáo "Application of power electronic components to control parameters and switching of compensation devices on power networks " doc
Ngày tải lên :
05/03/2014, 14:20
... according with sample pulses to fire thyristor valves.
- Pulse Amplifier: to amplify both sample pusles and controlling pulses to fire desired thyristor
valves.
- Isolator: to isolate the power circuit ... time to issue controlling pulses in the positive half-cycles of applied
voltage to thyritor valves.
- Generate firing pulses to fire thyristor valves. The pulses have amplitudes from 2 V to 10 ... change in
spite of using Automatic Reactive Power Regulator. To regulate voltage and cosφ in an expected
range, it is necessary to change the parameters of regulators as the loads change.
Determining...
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Báo cáo khoa học: Saccharomyces cerevisiae coq10 null mutants are responsive to antimycin A ppt
Ngày tải lên :
06/03/2014, 22:21
... reduced QH
2
to cytochrome c.
At the P-site, two electrons are transferred in a concerted manner
from QH
2
to the iron–sulfur protein and to cytochrome b
L
. My-
xothiazol (Myx) binds to the P-site ... Coq10p binding to Q
6
.
To better understand the function of Coq10p, we
tested the reducibility of Q
6
in a coq10 null mutant in
the presence of inhibitors that block Q
6
binding to the
P (o)-site ... of mitochondria at
400 lgÆmL protein
)1
, or spheroplasts at 600 lgÆmL
)1
total
cell protein. All measurements were carried out in the pres-
ence of 0.002% digitonin. In order to block cytochrome...
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Báo cáo khoa học: Gene expression silencing with ‘specific’ small interfering RNA goes beyond specificity – a study of key parameters to take into account in the onset of small interfering RNA off-target effects potx
Ngày tải lên :
07/03/2014, 05:20
... SERPINE1 ⁄ PAI-1
(serpin peptidase inhibitor 1 ⁄ plasminogen activator
inhibitor-1), TFDP1 (transcription factor Dp-1),
TNFRSF10B (tumor necrosis factor receptor super-
family, member 10b) and TYMS ... considered to be the best and easi-
est approach to loss-of-function experiments. However, several recent stud-
ies underscore the off-target and potential cytotoxic effects of siRNAs,
which can lead to ... FEBS
also able to trigger an ‘interferon (IFN) response’
through the activation of cytosolic proteins such as
dsRNA-dependent protein kinase and ⁄ or membrane
receptors such as Toll-like receptor 3 (TLR3),...
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Body composition in the elderly: Reference values and bioelectrical impedance spectroscopy to predict total body skeletal muscle mass pot
Ngày tải lên :
28/03/2014, 20:20
... to the age dependent changes in body composi-
tion, it would be useful to obtain BIS reference values for the
elderly.
BIS-measured segmental total water volume has previously
been reported to ... and -reactance values were
calculated from the Cole–Cole model parameters obtained from BIS,
using Matlab (Matlab
Ò
, R2006b, Mathworks). In order to compare
body composition to a previous birth ... 52–5856
Original Article
Body composition in the elderly: Reference values and bioelectrical impedance
spectroscopy to predict total body skeletal muscle mass
q
Marja Tengvall
a
, Lars Ellegård
a
,
*
,...
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Handling Missing Values: Application to University Data Set doc
Ngày tải lên :
28/03/2014, 23:20
... regard these extreme values as noise, and ignore them.
The problem is that one never knows if the extreme values are correct or not, and the challenge is
how to handle “weird” values in the best ... Understandable
Method to Treat Missing Values: Application to a Medical Data Set”, In ACM Comput.
Surv. 1985.
[11] Luai Al Shalabi, “A comparative study of techniques to deal with missing ...
Accuracy Versus Tolerance
20
30
40
50
0% 5% 10% 15% 20%
Tolerance
Accuracy
Average
Class
Probability
Probability + Class
Fig. 1 Accuracy versus Tolerance with 10% Missing values filled
International...
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