Data not displayed in Preview Tab, but is displayed in Data Tab

This has happened on more than one occasion. I have defined a stored
procedure type datasource with 12 parameters. When I execute the SP in the
Data tab, the resulting rows are correctly displayed. When I use the same
parameters when previewing the report, no data is displayed. I have found
that empty string parameters need to be <blank> on the data tab, but need to
be '' on the preview tab, so I know about this little gotcha.
Has anyone else had this problem and found a solution. I have check the rdl
file to make sure that the datasource and fields are correct. I have a table
and a pie chart on the report and both are empty when I preview it.
===================== Thanks!
Keith
p.s. Get off the couch and exercise!I have answered my own question.
This might come in handy for a few people. If one of your parameters is a
string and the SP allows an empty string, then make sure to check the
Parameter definition box "Allow Blank Value". otherwise if you try to send
it a blank or '' (empty string), then SQL profiler shows the parameter as
N'''. This solved my problem and I am now getting data.
=====================Thanks!
Keith
p.s. Get off the couch and exercise!
"Keith" wrote:
> This has happened on more than one occasion. I have defined a stored
> procedure type datasource with 12 parameters. When I execute the SP in the
> Data tab, the resulting rows are correctly displayed. When I use the same
> parameters when previewing the report, no data is displayed. I have found
> that empty string parameters need to be <blank> on the data tab, but need to
> be '' on the preview tab, so I know about this little gotcha.
> Has anyone else had this problem and found a solution. I have check the rdl
> file to make sure that the datasource and fields are correct. I have a table
> and a pie chart on the report and both are empty when I preview it.
>
> =====================> Thanks!
> Keith
> p.s. Get off the couch and exercise!

Data not being displayed.

Hi,
I have just installed MS SQL in my computer and I am trying to run MSSQL and Visual studio for the first time. However I have run into aproblem that I can't solve. Basically the problem is that the data Ifetch from the database is not being displayed/bound to the ddl I haveon the page.
I have used VS to configure the sqlDataAdapter, DataSet, sqlConnection,and the sqlCommands. Basically the data is being fetched from theNorthwind sample database. From the preview option on thesqlDataAdapter I am able to preview the information from the database.So it seems to work. I have also configured the ddl settings so thatthe Categories table is the datasource. I have also set the ddl.DataTextField = "CategoryName"; ddl.DataValueField = "CategoryID";
When I compiled and run the page, no error messages are generated, butthe ddl is still completely blank and I can't understand why.
Does anybody know how I can solve this?? :s

Om Sri Sai Ram

Did you callDataBind method.

Thanks,

Ram

|||Hi,
I have just double-checked that I had called DataBind, and itturns out that I had. However, I had forgotten to fill the DataSet:
this.sqlDataAdapter1.Fill(this.dataSet11);
Now I get an error message:
Login failed for user 'DISABLED\ASPNET'|||Om Sri Sai Ram

Are u using windows authentication? If yes, check whether ASPNET account has pemission to access the table.
If you still have problems, post the code.
Thanks,
Ram