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by: DraguVaso |
last post by:
Hi,
Something I don't understand about a Typed DataSet: When a value in the
DataSet is DBNull, it throws this error: "Cannot get value because it is
DBNull".
But aren't Typed DataSets invented to make life easier, to be able to get to
tge Tables and Values with less code, in less time? But with this thing you
need to add a Try-Catch around every statement when using the value, add for
each value a default value in your DataSet (and...
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by: chambersdon |
last post by:
I have an application that needs to insert nulls into the database and
I don't seem to be able to do this.
I am currently trying to do this with a Typed DataSet but I can't seem
to Insert Nulls (or udpate columns with a null value).
I have a column in a test table called 'anInteger'.
The Typed DataSet for this element has minOccurs="0" and the type =
xs:int.
To set this field to null I call the SetanIntegerNull method of my
typed...
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by: Thomas A |
last post by:
Hi,
I fill a datgrid with data from a xml document, it works fine
But....
Now I will to filter the data to the grid so only the data shows from
the criteria that I set.
My code now is very simple to fill the grid
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by: Nick |
last post by:
Hello,
Please pardon my ignorance as I'm sure this is easy to do. I have a datagrid
where I want to let the user delete columns. I added a context menu to the
datagrid that has a delete option. If the user right clicks on a column
heading can I highlight that column and then delete it? I'm not exactly sure
how to highlight it or figure out what column has been clicked.
In my testing so far when I use the context menu I always get the...
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by: Dylan Parry |
last post by:
Hi,
At the moment I use code like the following:
string myString = this.dataReader.IsDBNull(2) ? null :
this.dataReader.GetString(2);
With a record from the DB that looks like:
..---------------------------.
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by: Giacomo |
last post by:
Hi,
I've the following problem. I must delete a column DEFAULT from a table,
but I must do it with a script, independently from the server where it'll
be executed.
Locally I've tried with:
ALTER TABLE .
DROP CONSTRAINT
GO
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by: macupryk |
last post by:
if (TEXTDT.Rows != DBNull.Value)
{System.IndexOutOfRangeException: There is no row at position 10.
at System.Data.RBTree`1.GetNodeByIndex(Int32 userIndex)
at System.Data.DataRowCollection.get_Item(Int32 index)
I have to fix this somehow so it does not bomb on this.
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by: mfunkmann |
last post by:
Hi,
I recently got an error and I don't know how to fix it:
Error 1 'System.Data.DataColumn' does not contain a definition for
'Windows' C:\c#\CsharpPRO\Form1.Designer.cs 304 77 CsharpPRO
I am note sure what to do because all propertiers work, except the
System.Data.DataColumn..
I didn't write any code by hand and used the visual studio to set the
properties..
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by: downwitch |
last post by:
I'm not sure if this is possible, and it's tough to search for via
google, so...
I have a user-defined function that checks whether a given column has
a default value set on it or not, as an example of what I'm trying to
do. (It reads the system tables sysobjects, sysconstraints, and
syscolumns, and returns a table of records, empty or not.)
I need to use this function across a number of databases. But if I
create it in a "utility"...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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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: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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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: 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: 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: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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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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