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by: John Morgan |
last post by:
In an SQL statement which concatenates several fields I get a null
value returned if any one of the fields are null.
Is this to be expected?
For example :
SELECT tblMember.memberAddress + ' ' + tblMember.memberTown + ' ' +
tblMember.memberCounty + ' ' + tblMember.memberPostCode + '<br> ' +
tblMember.memberCountry + '<br> ' + tblMember.memberInstitution AS
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by: Robb Gilmore |
last post by:
Hello,
We have a C#.NET app which is calling a Java webservice. We use the wsdl
file exportted from the java webservice to create our web-reference in Visual
Studio. We are able to create the parameter classes and call the webservice
just fine.
Our problem is, within our .Net app, we have some value objects ( like
floats, for instance ) which are meant to be null. Since there is no null
float, we use float.minvalue to indicate a...
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by: PK |
last post by:
Hi, I have an application that opens a Crystal report document and
passes in a value to a parameter in the report (pointing to an Oracle
DB). However, if I want to pass a "null" value to retrieve all records
that have no data for the specified field that the parameter is a
condition of (ie. SELECT * from <table> where <field> is null"), it
returns nothing. I think CR is building the SQL statement like "SELECT
* from <table> where <field>...
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by: Robert |
last post by:
I need to be able to send a null value into a Sql Server datetime field. The
follolwing code is a snippet of what I am using. I am parsing a flat file
from the main frame and inserting it into a Sql DB. The "departDate can be a
null value in Sql Server. I cannot figure out how to assign a null value to
a SqlDateTime variable and use that variable as part of a SqlParameter, The
error I keep getting is: SqlDateTime overflow. Must be...
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by: TC |
last post by:
What does it mean for an integer to have a null value? I am trying to use
the DataView.Find method. That method has an integer return type which
contains the "index of the row in the DataView containing the sort key value
specified; otherwise a null value if the sort key value does not exist."
By "null value", does it mean System.DBNull? (I thought only objects could
evaluate to System.DBNull.) How can I test whether an integer variable...
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by: David Shorthouse |
last post by:
Hey folks,
I am attempting to pass null as the input value from a series of
textboxes if the user does not input a value prior to submit. To try and do
this, I am using a vbscript function on this asp as follows:
CommentsAdd = IIf(Request.Form("Comments")="",NULL,Request.Form("Comments"))
I was hoping this would convert those emptystring textboxes to null.
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by: kumar.senthil |
last post by:
Hi,
I'm using XmlSerializer to create an object from the XML string. I
would like to know whether I can get a null value for an empty XML
element.
Actually the XmlSerializer assigns "" (empty string) for a string
if the corresponding element is missing in the XML.
Input XML:
<DemoClass><A>some value</A><B></B><DemoClass>
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by: monika varshney |
last post by:
I have to read a database using dataset. My database has some null values.
My code is working fine when there is a value in the database. But when there is a null value in the database, dataset throws an exception.
I have to read null value in a variable. I have tried this....
if (dr != DBNull.Value)
{
abc = Convert.ToDouble(dr);
MessageBox.Show("value is:" +...
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by: prabirchoudhury |
last post by:
CRITERIA;
+-------------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+--------------+------+-----+---------+-------+
| CritCode | int(4) | NO | PRI | 0 | |
| Description | varchar(150) | YES | | NULL | |
| CritGroup | varchar(10) | YES | | NULL | |
| Detail | varchar(30) | YES | | NULL | ...
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by: qwedster |
last post by:
Folk!
How to programattically check if null value exists in database table (using stored procedure)?
I know it's possble in the Query Analyzer (see last SQL query batch statements)?
But how can I pass null value as parameter to the database stored procedure programattically using C#?
Although I can check for empty column (the following code passes string.Empty as parameter but how to pass null value?), I cannot check for null value...
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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.
The Art of Business Website Design
Your website is...
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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: 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: 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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