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by: jim |
last post by:
This line of code returns error 13, cast from 'DBNull' to type 'String' is not valid
If IsDBNull(Clinics.Clinics.Item(A).Workphone) The
<other code
End I
Clinics.Clinics is a dataset that was loaded using a left join from two MS SQL database tables. The workphone element is null because there was no corresponding record from the right side of the join
The generated code for retrieving the value of 'Workphone' as a dataset property...
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by: Jim |
last post by:
I am having a problem with the IsDBNull function. When it checks what
type of value is contained in the parameter that is passed to it, it
does not successfully determine that it has a DBNull value. If I
access the value of what I am going to pass to the IsDBNull function
before I call the IsDBNull function then it does successfully
determine that it has a DBNull value. Below is a page that I am using
to test. Note: that the value for...
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by: Max |
last post by:
Why doesn't this work:
cbAutoBill.Checked = IIf(IsDBNull(reader("autobill")), False,
Convert.ToBoolean(reader("autobill")))
Gives error: Object cannot be cast from DBNull to other types.
But this does:
cbAutoBill.Checked = IIf(IsDBNull(reader("autobill")), False,
reader("autobill"))
"autobill" is a bit
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by: Paul D. Fox |
last post by:
I have this code snippet below where I'm loading all the labels based upon
the retrieved record from the DataReader. Unfortunatley, some of the values
are null, so I can't explicitly set the labels without checking first. Is
there a better method to write this than using a bunch of "If" statements?
Could it be a function? if so, how would I write it?
'Read the single record
While drLeadFeedback.Read()
If Not...
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by: Chris Crowe [MVP 1997 -> 2006] |
last post by:
I am having major problems using GetStoredProcCommand and using Parameters
in the same function call in the latest builds of the Enterprise Library
Data.
The error I get is :
Failed to convert parameter value from a SqlParameter to a String.
Here is some code that works and does not work.
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by: GM |
last post by:
Dear all,
Could you all give me some guide on how to convert my big5 string to
unicode using python? I already knew that I might use cjkcodecs or
python 2.4 but I still don't have idea on what exactly I should do.
Please give me some sample code if you could. Thanks a lot
Regards,
Gary
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by: Brad Isaacs |
last post by:
I am using ASP.NET 2.0 codebehind Visual Basic, Visual Studio 2005
Working with DataSet creating a Data Access Layer via VS 2005.
My error is when the code that is prewritten by VS 2005 Casts to String but
the data inside the column is a NULL.
Code prewritten by visual studio:
<System.Diagnostics.DebuggerNonUserCodeAttribute()_
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by: Rainer Queck |
last post by:
Hello NG,
I have a typed dataset, where I want to check the column of a datarow if it
is DBNull.
How can the following code cause an Exception (what is does):
if (Convert.IsDBNull(myDataRow.vrAbarbeitung))
{
....
}
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by: tshad |
last post by:
I have a value in my sql table set to tinyint (can't set to bit).
I am trying to move it into a boolean field in my program and have tried:
isTrue = (int)dbReader
and
isTrue = Convert.ToBoolean((int)dbReader)
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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: 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: 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: 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: 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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