DataSet.WriteXML - Replace DBNull

Question

0.00/5 (No votes)

See more:

Hello,I need to export a DataSet to XML but every column with DBNull value disappears from the final xml file!

myDataAdapter.Fill(myDataSet, "info" ); myDataSet.WriteXml(dirpc + @"\gfmfinfo.xml" );

I need to find a way of replacing every DBnull value after the Fill so that every column appeares in the xml file. Any sugestions?

Posted 23-Nov-09 5:51am

enmo

Updated 6-Feb-10 2:08am

#realJSOP

v5

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Christian Graus · Answer 1 · 2009-11-23T09:30:00

Solution 1

I guess the obvious, brute force method is out of hte question ? How about sanitising your data at the point that you request it from the database ?

Posted 23-Nov-09 9:30am

Christian Graus

Abhijit Shivathare · Answer 2 · 2010-02-06T01:40:00

Here's one thing you could do. Are you using SQL to fill this dataset? If so, then you can write the SQL statement to handle the cases directly. Use the ISNULL function. So a sample statement would be...

SELECT FieldThatWontBeNULL, ISNULL(FieldThatMightBeNULL,'Null Replacement') as FieldThatMightBeNULL FROM MyTable

Then your dataset doesn't need to worry about this. If you need to set this replacement value dynamically, you can just build it into your SQL statement if you are building as a string, or set it up as a parameter if you're going via a stored procedure.
If you still need help, let us know