Data Processing Extensions - Parameters ?

Hi,
I am submitting a report to be run via sending the reportname and some
parameters via the RS WebService. Behind this I have a DPE. This all works
fine when there are no parameters. when I do pass params though, I have a
problem.
Trouble is that I cannot seem to lay my hands on the passed parameter values
(I presume a collection ?) when in my implementation class of the IDbCommand,
IDbCommandAnalysis interfaces
How can I obtain these params in the DPE ?
any help would be appreciated, thanks,The IDbCommandAnalysis interface serves the orthogonal purpose. It lets the
Report Designer know about the parameters that your query expects. During
runtime the Report Server calls IDataParameterCollection.Add to pass the
parameter values. This is where you will load them, e.g.:
public int Add(IDataParameter value)
{
Trace.WriteLine("DataSet Extension: Add(IDataParameter value");
if (((DsDataParameter)value).ParameterName != null)
{
return base.Add(value);
}
else
throw new ArgumentException("parameter must be named");
}
public DsDataParameter GetByName(string parameterName)
{
DsDataParameter parameter = null;
IEnumerator enumerator = this.GetEnumerator();
while (enumerator.MoveNext())
{
DsDataParameter tempParameter = (DsDataParameter) enumerator.Current;
if (tempParameter.ParameterName == parameterName)
{
parameter = tempParameter;
break;
}
}
return parameter;
}
Then, in your DataReader implementation you can get the parameters:
DsDataParameter parameter = m_parameters.GetByName(Util.DATA_SOURCE)
as DsDataParameter;
You can get a complete working DPE sample here:
http://www.gotdotnet.com/Community/UserSamples/Details.aspx?SampleGuid=B8468707-56EF-4864-AC51-D83FC3273FE5
--
Hope this helps.
----
Teo Lachev, MVP [SQL Server], MCSD, MCT
Author: "Microsoft Reporting Services in Action"
Publisher website: http://www.manning.com/lachev
Buy it from Amazon.com: http://shrinkster.com/eq
Home page and blog: http://www.prologika.com/
----
"softgui" <softgui@.discussions.microsoft.com> wrote in message
news:FE3B6E92-4E95-42E7-8E1B-2868F9670CB0@.microsoft.com...
> Hi,
> I am submitting a report to be run via sending the reportname and some
> parameters via the RS WebService. Behind this I have a DPE. This all
works
> fine when there are no parameters. when I do pass params though, I have a
> problem.
> Trouble is that I cannot seem to lay my hands on the passed parameter
values
> (I presume a collection ?) when in my implementation class of the
IDbCommand,
> IDbCommandAnalysis interfaces
> How can I obtain these params in the DPE ?
> any help would be appreciated, thanks,
>|||Many thanks Teo.
- simon
"Teo Lachev [MVP]" <teo.lachev@.nospam.prologika.com> wrote in message
news:%23OFyCBoqEHA.3712@.TK2MSFTNGP15.phx.gbl...
> The IDbCommandAnalysis interface serves the orthogonal purpose. It lets
> the
> Report Designer know about the parameters that your query expects. During
> runtime the Report Server calls IDataParameterCollection.Add to pass the
> parameter values. This is where you will load them, e.g.:
> public int Add(IDataParameter value)
> {
> Trace.WriteLine("DataSet Extension: Add(IDataParameter value");
> if (((DsDataParameter)value).ParameterName != null)
> {
> return base.Add(value);
> }
> else
> throw new ArgumentException("parameter must be named");
> }
> public DsDataParameter GetByName(string parameterName)
> {
> DsDataParameter parameter = null;
> IEnumerator enumerator = this.GetEnumerator();
> while (enumerator.MoveNext())
> {
> DsDataParameter tempParameter = (DsDataParameter) enumerator.Current;
> if (tempParameter.ParameterName == parameterName)
> {
> parameter = tempParameter;
> break;
> }
> }
> return parameter;
> }
> Then, in your DataReader implementation you can get the parameters:
> DsDataParameter parameter = m_parameters.GetByName(Util.DATA_SOURCE)
> as DsDataParameter;
> You can get a complete working DPE sample here:
> http://www.gotdotnet.com/Community/UserSamples/Details.aspx?SampleGuid=B8468707-56EF-4864-AC51-D83FC3273FE5
> --
> Hope this helps.
> ----
> Teo Lachev, MVP [SQL Server], MCSD, MCT
> Author: "Microsoft Reporting Services in Action"
> Publisher website: http://www.manning.com/lachev
> Buy it from Amazon.com: http://shrinkster.com/eq
> Home page and blog: http://www.prologika.com/
> ----
> "softgui" <softgui@.discussions.microsoft.com> wrote in message
> news:FE3B6E92-4E95-42E7-8E1B-2868F9670CB0@.microsoft.com...
>> Hi,
>> I am submitting a report to be run via sending the reportname and some
>> parameters via the RS WebService. Behind this I have a DPE. This all
> works
>> fine when there are no parameters. when I do pass params though, I have a
>> problem.
>> Trouble is that I cannot seem to lay my hands on the passed parameter
> values
>> (I presume a collection ?) when in my implementation class of the
> IDbCommand,
>> IDbCommandAnalysis interfaces
>> How can I obtain these params in the DPE ?
>> any help would be appreciated, thanks,
>>
>|||Hi Mr Softgui,
You can extend the DataParameter Extension to create your own types and then
cast them back into the (object) value property.
What do you think Teo?
Peter.
"softgui" wrote:
> Hi,
> I am submitting a report to be run via sending the reportname and some
> parameters via the RS WebService. Behind this I have a DPE. This all works
> fine when there are no parameters. when I do pass params though, I have a
> problem.
> Trouble is that I cannot seem to lay my hands on the passed parameter values
> (I presume a collection ?) when in my implementation class of the IDbCommand,
> IDbCommandAnalysis interfaces
> How can I obtain these params in the DPE ?
> any help would be appreciated, thanks,
>