select distinct rows from datatable using linq vb net
Copying Rows from One DataTable to Another
Ngày tải lên :
28/10/2013, 18:15
... 5.1 Copying Rows from One DataTable to Another
Problem
You have records in a DataTable that you need to copy to another DataTable.
Solution
Use the ImportRow( ) method of the DataTable to ... of the DataTable
using the row index.
•
Use the Select( ) method of the DataTable.
•
Use the RowFilter property of a DataView for the DataTable.
The sample code creates a source DataTable ... DataRow objects from one
DataTable to another. Three techniques for selecting records to copy are demonstrated in
the following example:
•
Use the Rows property to access rows in the DataRowCollection...
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Tài liệu Using Stored Procedures to Add, Modify, and Remove Rows from the Database phần 1 pdf
Ngày tải lên :
14/12/2013, 13:15
... SqlDataAdapter();
mySqlDataAdapter.SelectCommand = mySelectCommand;
The SELECT statement is then run when you call the mySqlDataAdapter object's Fill()
method to retrieve rows from the Products table ... DataAdapter.
Using Stored Procedures to Add, Modify, and Remove Rows from the Database
You can get a DataAdapter object to call stored procedures to add, modify, and remove
rows from the database. ... object containing a SELECT
statement and sets the SelectCommand property of a SqlDataAdapter to that
SqlCommand:
SqlCommand mySelectCommand = mySqlConnection.CreateCommand();
mySelectCommand.CommandText...
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Tài liệu Using Stored Procedures to Add, Modify, and Remove Rows from the Database phần 2 doc
Ngày tải lên :
14/12/2013, 13:15
...
Calling myDataTable.NewRow()
myNewDataRow.RowState = Detached
Calling myDataTable .Rows. Add()
myNewDataRow.RowState = Added
Calling mySqlDataAdapter.Update()
numOfRows = 1
myNewDataRow.RowState ... the Add() method through the Rows property
// to add the new DataRow to the DataTable
Console.WriteLine("Calling myDataTable .Rows. Add()");
myDataTable .Rows. Add(myNewDataRow);
Console.WriteLine("myNewDataRow.RowState ... int numOfRows = mySqlDataAdapter.Update(myDataTable);
mySqlConnection.Close();
Console.WriteLine("numOfRows = " + numOfRows);
Console.WriteLine("myRemoveDataRow.RowState...
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Using LINQ to DataSet
Ngày tải lên :
03/10/2013, 00:20
... ADO .NET data into
a LINQ query.
Dwonloaded from: iDATA.ws
Chapter 18 Using LINQ to DataSet
313
Chapter 18 Quick Reference
To Do This
Include a DataTable instance in a LINQ query Call the DataTable ... and shows you
how to employ them to extract data from data sets using the power of LINQ.
Understanding the LINQ to DataSet Provider
ADO .NET s DataTable class, as a logical collection of data-laden ... and performs a projection of fields from each source table.
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Chapter 18 Using LINQ to DataSet
307
C#
// Explicit join.
var results = from cu in Customer.AsEnumerable()
...
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Using LINQ to Entities
Ngày tải lên :
03/10/2013, 00:20
... remotely run SQL
statement. While other LINQ providers can be mixed—Chapter 18, Using LINQ to DataSet,”
combined LINQ to Objects and LINQ to DataSet content LINQ to Entities imposes restric-
tions ... Queries with LINQ to Entities
As with all LINQ providers, the general structure of LINQ to Entities queries varies only a little
from the LINQ to Objects standard. In fact, looking at a LINQ to Entities ... array. The
result2 query is actually doing its work using LINQ to Objects.
Dwonloaded from: iDATA.ws
Dwonloaded from: iDATA.ws
Chapter 19 Using LINQ to Entities
323
Math and statistical functions...
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Using LINQ to SQL
Ngày tải lên :
03/10/2013, 00:20
... platform. LINQ
to DataSet and LINQ to Entities both allow you to build LINQ queries that interact with data
sourced from SQL Server, either directly (LINQ to Entities) or indirectly (LINQ to ...
chapter.
Dwonloaded from: iDATA.ws
Chapter 20 Using LINQ to SQL
333
Using LINQ to SQL, especially when building models with its visual designer, is straightforward
and often much quicker than setting up a LINQ ... function within a LINQ query.
Dwonloaded from: iDATA.ws
Chapter 20 Using LINQ to SQL
335
C#
using (SalesOrderLink context = new SalesOrderLink(connectionString))
{
var results = from cu in context.Customers
...
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Select Whether the Report Will Be Displayed, Printed, or Exported Using Visual Basic .NET
Ngày tải lên :
20/10/2013, 13:15
... either at design time using
the property sheet, or at runtime using code.
Exporting Using the Report Document
When you're exporting using the Report document, you will be using the ExportOptions ... btnExport.Click
Dim strExt As String
Try
With Me.rdHowTo10_4.ExportOptions
Select Case lstExportType.SelectedItem
The PrintOptions object, found on the ReportDocument, is very useful. ... when you're using tools such as the Viewer in a tabbed form, the tab pages
can become cluttered. If you want to limit the power of the Viewer or make it more
10.4 Select Whether the...
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Tài liệu Reading Rows from a SqlDataReader Object docx
Ngày tải lên :
21/01/2014, 07:20
... get the column values from your DataReader.
Let's take a look at some code that uses the GetOrdinal() method to obtain the positions
of the columns from the example SELECT statement:
int ... performance and flexibility.
Warning When you've finished reading the rows from your DataReader object, close it
using the Close() method. The reason for this is that a DataReader object ...
Listing 9.1: USINGCOLUMNORDINALS.CS
/*
UsingColumnOrdinals.cs illustrates how to use the GetOrdinal()
method of a DataReader object to get the numeric positions of
a column
*/
using System;...
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Tài liệu Build Your Own ASP.NET 3.5 Web Site Using C# & VB, 3rd Edition docx
Ngày tải lên :
14/02/2014, 10:20
... Click Next.
Build Your Own ASP .NET 3.5 Web Site Using C# & VB (www.sitepoint.com)
18 Build Your Own ASP .NET 3.5 Web Site Using C# & VB
If you’re using VB. NET, you’ll need to generate ... Fig-
ure 1.16.
Build Your Own ASP .NET 3.5 Web Site Using C# & VB (www.sitepoint.com)
2 Build Your Own ASP .NET 3.5 Web Site Using C# & VB
What is ASP .NET?
ASP .NET is a sophisticated and powerful ...
you’re using C# is completely different from the one it generates when you’re using
VB. NET. They’re based on the same platform and use the same data types and
features, so C# and VB. NET are...
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Tài liệu Báo cáo khoa học: "Extracting Comparative Entities and Predicates from Texts Using Comparative Type Classification" pptx
Ngày tải lên :
20/02/2014, 04:20
... performance.
Next, we did experiments using all of the
continuous lexical sequences and using all of the
POS tags sequences within a radius of n words
from each CK as features (n=1,2,3,4,5). ... of EMNLP’03.
Seon Yang and Youngjoong Ko. 2009. Extracting
Comparative Sentences from Korean Text
Documents Using Comparative Lexical Patterns and
Machine Learning Techniques. In Proceedings ... each
probability value of all CE-candidates using SVM.
For example, if a sentence has three “P”s, one “P”
with the highest probability value is selected as the
answer PR.
5 Experimental Evaluation...
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Tài liệu Báo cáo khoa học: "Knowledge Acquisition from Texts : Using an Automatic Clustering Method Based on Noun-Modifier Relationship" pptx
Ngày tải lên :
22/02/2014, 03:20
... example, the candidate terms
(NATIONAL NETWORK, REGIONAL NETWORK, DIS-
PATCHING NETWORK) give the context (NATIONAL,
REGIONAL, DISPATCHING) for the noun NETWORK.
If we suppose that the modifiers ... obtained
from the two different data sets.
4 The conceptual analysis : the
LEXICLASS software
LEXICLASS is a clustering tool written using C lan-
guage and specialised data analysis functions from ... (e.g. REGIONAL NETWORK is
extracted by
LEXTER),
and a '0' otherwise ("national
line" is not extracted by
LEXTER).
NATIONAL DISPATCHING REGIONAL
LINE 0 1 0
NETWORK 1 1...
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Beginning Object-Oriented ASP.NET 2.0 with VB.NET: From Novice to Professional pptx
Ngày tải lên :
14/03/2014, 23:20
... Performance and Maintenance first if you are using Windows XP). Once the Admin-
istrative Tools are open, select Internet Information Services. If you do not see Internet
Information Services within the ... . . . . . . . . . . . . . xvii
■CHAPTER 1 An Introduction to .NET and Visual Studio 2005 . . . . . . . . . . . 1
VB. NET and ASP .NET. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 3:15 AM Page vii
5386fm_final.qxd 8/18/05 3:15 AM Page vi
Beginning Object-Oriented
ASP .NET 2.0 with VB. NET
From Novice to
Professional
Brian R. Myers
5386fm_final.qxd 8/18/05 3:15 AM Page i
corner...
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