... [ Team LiB ]
Recipe 2.7 Counting Records in a DataReader
Problem
You want to determine how many records there are in a DataReader.
Solution
Use one of the following three techniques: ... determine the number of records in the result
set for the DataReader without iterating through all of the records. Additionally, because
the DataReader is forward-only, you...
...
include inner joins, left outer joins, and right outer joins.
Inner Join
This join displays records in which at least one record exists in each table for the joined
field. This means that ...
Technique
To find out which records (customers) don't have corresponding records (invoices) in a
related table, you have to have a better understanding of the types of joins t...
... shown in the sample code to locate data in the table
meeting user-specified criteria.
The sample code contains two event handlers:
Form.Load
Sets up the sample by creating a DataTable containing ... File: FindDataTableRowsForm.cs
// Namespaces, variables, and constants
using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
// Table name con...
... the
database.
Using a DataGrid Control to Access a Database
A DataGrid allows you to access rows in a database table. In the following sections,
you'll learn how to create an ASP.NET ... create a DataSet object. You use a DataSet object to store a local copy
of the information stored in the database. A DataSet object can represent database
structures such...
... setup of the DataAdapter object.
Adding a DataRow to a DataTable
In this section, you'll learn how to add a DataRow to a DataTable. Before you see this,
let's populate a DataSet with ... DataAdapter.
Setting the InsertCommand Property of a DataAdapter
The following example creates a SqlCommand object named myInsertCommand that
contains an INSERT statement:
SqlC...
... Economics Teaching Program
2003-2004
Marketing Places
Lecture note
Business Opportunities in a Place
Phan Chanh Duong
1 Xinh Xinh/Kim Chi
BUSINESS OPPORTUNITIES IN A PLACE
Phan Chanh ... Duong
As the saying goes: “Traveling forms a young man”, our living space widens as we know
more places. For businesses, traveling is exploring opportunities.
As one goes to a...
... schema and loads the data and schema
InferSchema Ignores any inline schema and infers the schema from the XML data
DiffGram Reads a DiffGram and adds the data to the current schema
Fragment Reads and ... existing DataSet schema and any data that does not fit in it is discarded. If no schema exists
in the DataSet, no data is loaded. Notice that an empty DataSet has no schema information....
... standard.
Horizontal Cabling
Backbone Cabling
Equipment
Distribution Area
Racks and Cabinets
Horizontal
Distribution Area
LAN, SAN, and KVM
switches
Main Distribution Area
Routers, Backbone LAN/SAN ... Telecommunications, Inc. All Rights Reserved
In high-bandwidth applications,
signal throughput is imperative
for maintaining signal integrity.
• AllADCsystemsareimpedancematchedto...
...
• Log off Windows and Log back on as Administrator, and then navigate to the
Chemistry\Laboratory folder.
• Try to create a file in the Laboratory folder.
Was the attempt to create this file ...
selecting them in the name box and clicking the Add button. Again, do so according
to the chart in Step 1, then click OK.
Note: Do not proceed to Step 7 until all Users & Groups hav...
...
iBT
At
A
Glance
fr
om
ETS
®
What
is
ever
ybody
speaking
listening
r
eading
writing
about?
Communicate
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Confidence
Listening.
Learning.
Leading.
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A
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OEFL
COMPUTER-BASED
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OEFL
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APER-BASED
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OEFL
SKILLS
TESTED
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Listening
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Speaking
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Reading
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Writing
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Structure
(Grammar)
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Reading
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Writing
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Listening
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Structure...