Is there a way to read type float

Question

1.00/5 (2 votes)

See more:

Hi, Im reading data from the database using populate reader and the values that are type float don't want to display. i tried going through the code step by step but when it reaches type float the application stops, please help

C#

private void populate_report(Bank e, IDataReader dr)
{
   e.bank_id = dr.GetInt32(0);
   e.bankind_date = dr.GetString(1);
   e.r200 = dr.GetFloat(2);
   e.r100 = dr.GetFloat(3);
}

Posted 1-Nov-12 4:46am

andilemtshali

Add a Solution

Comments

fjdiewornncalwe 1-Nov-12 10:59am

Without knowing the exception that you are receiving, we really won't be able to help much. Could you please use the Improve Question widget and add that information to your question?

Chris Ross 2 1-Nov-12 11:02am

It would also help if you included information about the Bank class - in particular the r200 and r100 property declarations.
If you went further to include information about the database data type of the columns that become items 2 and 3 in your data reader, that would also help.

Pete O'Hanlon 1-Nov-12 11:22am

If the application is "stopping" at that point, it would suggest to me that the value isn't actually a float value in the database. What values are you getting there from the query, and what exception is being thrown?

DaveyM69 1-Nov-12 11:29am

The remarks section says:
No conversions are performed. Therefore, the data retrieved must already be a single-precision floating point number.
Call IsDBNull to check for null values before calling this method.
I would start with those...

Sergey Alexandrovich Kryukov 1-Nov-12 12:50pm

If could be anything. Actual data could be not of the type you expect; it could be text data, for example (varchar, etc.)...
--SA

1 solution

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)

menarenprvn · Answer 1 · 2012-11-04T19:58:00

Try this,

C#

private void populate_report(Bank e, IDataReader dr)
{
   e.bank_id = dr.GetInt32(0);
   e.bankind_date = dr.GetString(1);

   if(! dr.IsDBNull(dr.GetDouble(2))
   {
     e.r200 = dr.GetDouble(2);
   }

   if(! dr.IsDBNull(dr.GetDouble(3))
   {
     e.r100 = dr.GetDouble(3);
   }
}