473,395 Members | 1,554 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,395 software developers and data experts.

Computed Field In Typed Dataset

I have a list box that is bound to an object data source. I added a column,
say ColumnC, to my typed data set (using the designer) and for the expression
property I entered

ColumnA + ': ' + ColumnB

When I preview the data in the designer I get exactly what I want.

Now I go over to the object data source on my web page, refresh it and
refresh the schema. I can now see ColumnC as an option for the list box's
data text field. However, when I run the page nothing shows up in the list
box. However, when I view the page source, I see that the data value field
did render.

Next I put in a value (instead of the default DBNull) for the DefaultValue
property. After going through the whole exercise of refreshing and such
again, I run the page and the default value I put in is returned in the list
box.

Does anyone know what I missed? It must be something stupid.

Thanks ...
Jul 16 '07 #1
0 1255

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

Similar topics

1
by: J | last post by:
Situation - Using the table pubs.titleauthor in a strongly typed dataset, attached to a datagrid, using the datagrid I would like to set the royaltyper field = null (the database allows nulls in...
0
by: Bennett Haselton | last post by:
It seems whenever I add a new field to a database table that's queried by DataAdapters in my project, I get run-time errors because I don't go back and re-generate all the DataAdapters to read the...
3
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...
1
by: Optimus | last post by:
Hi everyone, I currently develop an application in vs.net 2005 with vb.net. I was trying to use typed dataset and I've got in trouble for converting untyped dataset into Typed DataSet. I don't...
7
by: Dabbler | last post by:
I'm using an ObjectDataSource with a stored procedure and am getting the following error when trying to update (ExecuteNonQuery): System.Data.SqlClient.SqlException: Procedure or Function...
0
by: mirco | last post by:
Hi, I have created a Typed DataSet. The DataTable is (distrimarket.DatiDT). Then a GridView is populated. The last column is computed and it is the difference between the previous two. I get this...
4
by: Ronald S. Cook | last post by:
I've always used untyped datasets. In a Microsoft course, it walks through creating typed datasets and harps on the benefits. It has you drag all these things around ..wizard, wizard, wizard......
7
by: Aamir Mahmood | last post by:
Hi All I have DataTable object. Is there a way that I can know which fields (columns) in the table are computed. Apparantly the DataTable.Columns returns all columns both computed and other....
4
by: Rachana | last post by:
Hi, I have understood Data Sets but what is meant by typed/untyped/ strongly typed datasets. Can any one explain me or suggest any site/ article, to get these concepts (and their ...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
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,...
0
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,...
0
jinu1996
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...
0
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,...

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.