473,699 Members | 2,813 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

### Problem with Typed Dataset ###

Hi,

I am using typed dataset for Employees Table and found a problem, can anyone tell me what's wrong

Case 1:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Null(Allowed)

When I retrieve data and fill into the typed dataset from the above table(select ID,Name from Employees), Works fine

Case 2:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Not Null,Default Value: ('')

When I retrieve data and fill into the typed dataset from the above table(select ID,Name from Employees), doesn't work

I get a constraint exception in this case bcos Type column is not selected.

But Type column has a default value(''), It should work right?

doesn't works, any Ideas?????

Thanks
Kiran
Nov 19 '05 #1
6 1715
what constraint exception? can you specify exact error message? what are relationships in your database?
if you have typed dataset that contains three columns, why are you selecting only two?

peter
Nov 19 '05 #2
Hi,

I need only two columns, that's the reason I am selecting two.

The exception I get is

System.Data.Con straintExceptio n: Failed to enable constraints. One or more
rows contain values violating non-null, unique, or foreign-key constraints.

Thanks
Kiran
"Rogas69" <rogas69@no_spa mers.o2.ie> wrote in message news:%2******** ********@TK2MSF TNGP10.phx.gbl. ..
what constraint exception? can you specify exact error message? what are relationships in your database?
if you have typed dataset that contains three columns, why are you selecting only two?

peter
Nov 19 '05 #3
Kiran,

What's interesting is that the column Default works just fine if you are
programmaticall y adding Rows to the DataTable, just not when you're using the
DataAdapter.Fil l() ... I tried to find some overload of the .Fill() method
that might get around this, but couldn't. Sounds like a bug with the
DataAdapter, but so far I haven't found a way around it.

~~Bonnie

"Kiran" wrote:
Hi,

I am using typed dataset for Employees Table and found a problem, can anyone tell me what's wrong

Case 1:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Null(Allowed)

When I retrieve data and fill into the typed dataset from the above table(select ID,Name from Employees), Works fine

Case 2:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Not Null,Default Value: ('')

When I retrieve data and fill into the typed dataset from the above table(select ID,Name from Employees), doesn't work

I get a constraint exception in this case bcos Type column is not selected.

But Type column has a default value(''), It should work right?

doesn't works, any Ideas?????

Thanks
Kiran

Nov 19 '05 #4
Thanks Bonnie

"Bonnie Berent [C# MVP]" <Bo************ **@discussions. microsoft.com> wrote
in message news:CD******** *************** ***********@mic rosoft.com...
Kiran,

What's interesting is that the column Default works just fine if you are
programmaticall y adding Rows to the DataTable, just not when you're using
the
DataAdapter.Fil l() ... I tried to find some overload of the .Fill() method
that might get around this, but couldn't. Sounds like a bug with the
DataAdapter, but so far I haven't found a way around it.

~~Bonnie

"Kiran" wrote:
Hi,

I am using typed dataset for Employees Table and found a problem, can
anyone tell me what's wrong

Case 1:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Null(Allowed)

When I retrieve data and fill into the typed dataset from the above
table(select ID,Name from Employees), Works fine

Case 2:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Not Null,Default Value: ('')

When I retrieve data and fill into the typed dataset from the above
table(select ID,Name from Employees), doesn't work

I get a constraint exception in this case bcos Type column is not
selected.

But Type column has a default value(''), It should work right?

doesn't works, any Ideas?????

Thanks
Kiran

Nov 19 '05 #5
Can you not just add a dummy column to the select statement? The default is "" so

Select Id, Name, '' as Type from Employees

I have not tried this out but if you have not I would give it a whirl.

Rich

"Kiran" <ki***@gmail.co m> wrote in message news:O0******** ******@tk2msftn gp13.phx.gbl...
Hi,

I am using typed dataset for Employees Table and found a problem, can anyone tell me what's wrong

Case 1:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Null(Allowed)

When I retrieve data and fill into the typed dataset from the above table(select ID,Name from Employees), Works fine

Case 2:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Not Null,Default Value: ('')

When I retrieve data and fill into the typed dataset from the above table(select ID,Name from Employees), doesn't work

I get a constraint exception in this case bcos Type column is not selected.

But Type column has a default value(''), It should work right?

doesn't works, any Ideas?????

Thanks
Kiran
Nov 19 '05 #6
I give it a try, thanks
"Rich" <ri**********@i nspiritec.org> wrote in message news:e5******** *****@TK2MSFTNG P09.phx.gbl...
Can you not just add a dummy column to the select statement? The default is "" so

Select Id, Name, '' as Type from Employees

I have not tried this out but if you have not I would give it a whirl.

Rich

"Kiran" <ki***@gmail.co m> wrote in message news:O0******** ******@tk2msftn gp13.phx.gbl...
Hi,

I am using typed dataset for Employees Table and found a problem, can anyone tell me what's wrong

Case 1:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Null(Allowed)

When I retrieve data and fill into the typed dataset from the above table(select ID,Name from Employees), Works fine

Case 2:

Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20 ),Not Null
Type: Varchar(5), Not Null,Default Value: ('')

When I retrieve data and fill into the typed dataset from the above table(select ID,Name from Employees), doesn't work

I get a constraint exception in this case bcos Type column is not selected.

But Type column has a default value(''), It should work right?

doesn't works, any Ideas?????

Thanks
Kiran
Nov 19 '05 #7

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

0
1692
by: Natehop | last post by:
I've been attempting to design an n-tiered framework leveraging .NET's strongly typed Dataset. My Framework will serve as the foundation to several client apps from Windows applications to web sites and web services. The architecture consists of a business rules tier, a data tier, and a common tier. The common tier contains my typed Datasets while the business rules and data tiers contain functions to populate and save the common...
2
2310
by: malcolm | last post by:
Hello, We have a robust (.NET 1.1 c# winforms) client-server application that utilizes many typed DataSets, typed DataTables and typed DataRows. Our application is a series of windows and popup windows where you can edit information and data, nothing out of the ordinary. I estimate we have something like 50 to 100 tables and/or views in our database each of which map to one strongly typed DataTable. Now we have some odd 20 to 30 typed...
1
1713
by: Nedu N | last post by:
Hi All, I am facing problem in copying content of table from a untyped dataset into to a table inside the typed dataset. I wanted to copy the data into typed dataset in order to ease the further processing using typed references. DataSet ds = getDataFromDB(); - i am getting the dataset ds from a webservice I have got MyXSD which decsribes the shcema for the table which i am getting from the webservice
0
1630
by: | last post by:
Hi, I have an app that uses a typed dataset to persist user data. The dataset has a multiple tables with multiple table relations. The problem I am running into is that the user data is dynamic and is not predictable at design time. What I mean by this is the forms that user inputs data is not static - it changes dynamically at runtime based on user input. This makes it difficult to persist the data in a dataset with multiple...
2
2249
by: BeanTownBizTalkGuru | last post by:
Trying to get some feedback. Here's the scenerio. We are processing XML data which we generated a typed dataset to represent the XML document being processed. After procesing is complete we would like to add/update/delete the data in multiple databases. Here lies the disconnect. The XML representation is seperated from the physical model(s) in the database there for the typed datasets are drastically different. What is the best...
2
4373
by: David | last post by:
I have been developing applications with Java for quite a while but I am new to .NET development. I am trying to learn the ".NET way" of creating Strongly Typed Objects from a database. The Enterprise Library seems pretty close to what I am used to in Java but I am not sure how to create strongly-typed DataSets. I see that I can use the LoadDataSet method from a Microsoft.Practices.EnterpriseLibrary.Data.Database but I am not clear on how...
2
1837
by: Nedu N | last post by:
Hi Techies, I am facing problem in copying content of table from a untyped dataset into to a table inside the typed dataset. I wanted to copy the data into typed dataset in order to ease the further processing using typed references. DataSet ds = getDataFromDB(); - i am getting the dataset ds from a webservice I have got MyXSD which decsribes the shcema for the table which i am getting
0
1065
by: Sparky | last post by:
Hi, I am trying to use a typed dataset with a web service and am having problems with type casting errors. I have a typed dataset which is in both my web service and my consuming application. When I try to pass the typed dataset back to the consuming application from the web service through a web service function call, I get a "Specified Cast
3
2756
by: Freeon | last post by:
Hi, I am looking for a way to sort a strong typed dataset. It would seem the most straightforward way is to use a dataview. The only problem is when I use the dataview I seem to loose the strong typed properties from my original dataset Anyone that can point me to an example of how to sort my dataset and maintain the use of my typed properties would be greatly appreciated Thank, Freeon
8
1985
by: Harry Strybos | last post by:
Visual Studio 2005 - SP1 - VB.Net on WinXP SP2 I add a typed dataset to my solution and get the following errors : Error 1 sub 'ReadXmlSerializable' cannot be declared 'Overrides' because it does not override a sub in a base class. C:\AAProjects.Net\TRM8\TRM8.UI\Reports\BillingReport.Designer.vb 125 29 TRM8.UI Error 2 'Protected Overrides Function GetSchemaSerializable() As
0
8687
marktang
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...
0
9174
Oralloy
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...
1
8914
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,...
0
8884
tracyyun
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...
0
7751
agi2029
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...
1
6534
isladogs
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...
0
5875
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();...
0
4629
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
3
2009
bsmnconsultancy
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...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.