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by: jensen bredal |
last post by:
I have an array of datarow . Is there a performance efficient way of
deriving a datatable oject
containing only the rows in my array. ?
I want to avoid uding foreach .
Many thanks
JB
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by: Rich |
last post by:
Hello,
I need to store various values that I will need to look up later on. I have
been using hashtables and arraylists. But I can only store 2 items per row
in a hashtable - key, value, and only 1 item in an arraylist. Or, I could
create a class with various members and store that in a collection, or a
structure, ...
I was thinking, I could create a datatable and add data to the datatable.
But when I need to retrieve data from...
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by: Pete Wittig |
last post by:
Hi,
I have a DataTable and I want to get a subset of the rows within it. I use
the Select method to get my subset and the results are in a DataRow. I
want to put those Rows back into a DataTable. I've tried a few variations of
the following but no rows are every imported into the datatable:
DataRow datrow = ds.Tables.Select("PersonID = " + id);
DataTable dt = new DataTable();
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by: =?Utf-8?B?Sm9iIExvdA==?= |
last post by:
How can I reconcile changes between two data table and create a subset of
those changes. I have two data tables with same schema which gets populated
from two different xml files. I want to get hold of missing & changed rows in
first table from second table. Tables have ID as primary key.
Thanks
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by: byrd48 |
last post by:
Hi,
am attempting to create a DataTable by copying a table from a data
set, then filter the rows as follows:
DataTable dt = DataSet1.Tables.Copy;
DataRow dr = dt.Select("myexpression");
dt.Rows.Clear();
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by: ciccone1978 |
last post by:
Hi everybody,
Supposing I have a DataTable with the following columns .
I need to copy that DataTable with all its data but filtered by
columns, that is I want
to have a new DataTable with all rows and the columns .
What can I do?
Bye!
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by: Nathan Sokalski |
last post by:
I have a DataTable from which I only need a certain range of the DataRows.
What I would like to do is copy a range of rows from one DataTable to a new
DataTable like the following:
For i As Integer = start To last
table1.Rows.Add(table2.Rows(i))
Next
However, the code above gives an error saying the DataRow is already used in
another DataTable. Is there any easy way to copy a DataRow from one
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by: jehugaleahsa |
last post by:
Hello:
What is the point of using a DataTable in ASP .NET? We are unsure how
you can use them without 1) rebuilding them every postback, or 2)
taking up precious memory. We are not sure how to store a DataTable in
any other way outside of our servers. In doing so, we leave ourselves
open to large memory requirements. Furthermore, most web pages do not
really support multiple changes per transaction. In other words, when
the user submits...
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by: John Dann |
last post by:
Is there a concise/efficient way to retrieve blocks of rows from a
datatable with VB2005?
I've got a datatable (let's call it AllData), constructed
programmatically, that contains a lot of sequential scientific data,
each row being a point in a time-course potentially every minute and
with data maybe extending over many months. There's a column
(Date_Time) set as a primary key which contains a datetime stamp (as a
datetime type) for...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
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Your website is...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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