need column names from a select - may be no rows

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi;

I have a case where I have a select and I need to get the column names the
select will return. If the select will return a row I can just run the
select. But it is possible for there to be no rows and I still need the
column names. In this case Execute will return a DbDataReader with 0 rows and
I can't use GetName().

Any ideas?

--
thanks - dave
david_at_windward_dot_net
http://www.windwardreports.com

Cubicle Wars - http://www.windwardreports.com/film.htm
 
David,

Call the DbDataReader's GetSchemaTable method to get a datatable that
describes the datareader's column metadata.

Kerry Moorman
 
Hi Dave,

Could you please past some code snippet in newsgroup? I'm not sure how did
you get the DbDataReader and which provider are you using. I have test with
SQLDataReader on my side. However, SQLDataReadder.GetName() method will
return column name, even though there is no row returned by
SQLCommand.execute() method. Would you please provide some detailed
information.
Below is my test code:

SqlConnection sc = new SqlConnection();
sc.ConnectionString = @"Data Source=sha-dng-wywang;Initial
Catalog=AdventureWorks;Integrated Security=True";
SqlCommand scd = new SqlCommand();
scd.CommandText = "select * from DataBaseLog where databaselogid=100000";
scd.Connection = sc;
sc.Open();
SqlDataReader sdr=scd.ExecuteReader();
string columnName=sdr.GetName(0);
sc.Close();
Console.WriteLine(columnName);

Have a great day.
Sincerely,
Wen Yuan
Microsoft Online Community Support
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Hi Dave,
Thanks for your reply.

It seems like you have resolved the issue. Do you meet any further issue so
far?
Please let me know if you still have anything unclear. I'm glad to assist
you.

Have a great day,
Sincererly,
Wen Yuan
Microsoft Online Community Support
 
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