Accessing Report Parameters Class through Web Service

I am using ASP .NET along to render my reports. I've extended the web
service class such that I specify the report folder, and I get all
reports and their respective parameters. I then dyncamically create
the controls (such as datepicker, textbox, etc...) based on the
Parameter Name, and Type. The drop down list is the one giving me the
hardest time though.
My problem is this: I have a Report with 3 parameters. The first 2
are dates. I can retrive all info on them just fine. The name,
prompt, and type (datetime). The third parameter (AppUserKey) however
is a dropdown list of all the users. I wrote a stored procedure that
does this called spGetAppUsers. Here is the structure of this
parameter as per the RDL file:
</ReportParameters>
...
...
<ReportParameter Name="AppUserKey">
<DataType>Integer</DataType>
<DefaultValue>
<DataSetReference>
<DataSetName>spGetAppUsers</DataSetName>
<ValueField>AppUserKey</ValueField>
</DataSetReference>
</DefaultValue>
<Prompt>AppUserKey</Prompt>
<ValidValues>
<DataSetReference>
<DataSetName>spGetAppUsers</DataSetName>
<ValueField>AppUserKey</ValueField>
<LabelField>AppUserName</LabelField>
</DataSetReference>
</ValidValues>
</ReportParameter>
</ReportParameters>
I can get the Name, and even from the ValidValues, the ValueField and
LabelField, however, I want the <DataSetName> entry.
This is so that after I dynamically create the drop down list, I'm
able to populate it via the stored procedure. Recall that the
ReportParameter class is defined here:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/RSPROG/htm/rsp_ref_soapapi_ir_5zec.asp
ReportParameter::QueryParameter is a boolean property. Doesn't
actually return the name. Just whether or not you are using a query.
ReportParameter::DefaultValues is a string but is empty, since the
report hasn't executed the stored procedure (makes sense).
I want this to be a generic solution. Hence all this trouble to get
all the "givens" from the Report, and to reconstruct it in ASP .NET.
I need that DataSetName!!! :-S
Any help is appreciated.
Thanks for your time,
RoyThere are 2 ways to do what I want:
1. Instead of trying to get the stored procedure of my query based
parameter, I should've set forRendering = True in my
GetReportParameters function. That will actually return the query
based parameter set. Then I can populate the drop down list with that.
2. Load the .RDL (report definition in XML) in memory and use XPATH to
get the name of the parameter:
Dim reportDefinition As Byte() = Nothing
Dim doc As New System.Xml.XmlDocument
Try
reportDefinition = rs.GetReportDefinition(ReportsFolder &
strReportName)
Dim stream As New MemoryStream(reportDefinition)
doc.Load(stream)
In this scenario, assuming you have forRedering=True or False, you
still need to know the name of the parameter. So you'ld probably get
then name of the parameter and then check the value of QueryParameter
to see if it's true.
Then base your XPATH query on the following XML:
"/ReportParameter/ValidValues/DataSetReference/DataSetName[@.text]"
Or something similar. I forget. The above is proabably wrong and
could be written in a million different ways.
<ReportParameter Name="AppUserKey">
<DataType>Integer</DataType>
<DefaultValue>
<DataSetReference>
<DataSetName>spGetAppUsers</DataSetName>
<ValueField>AppUserKey</ValueField>
</DataSetReference>
</DefaultValue>
<Prompt>AppUserKey</Prompt>
<ValidValues>
<DataSetReference>
<DataSetName>spGetAppUsers</DataSetName>
<ValueField>AppUserKey</ValueField>
<LabelField>AppUserName</LabelField>
</DataSetReference>
</ValidValues>
</ReportParameter>
</ReportParameters>
Roy Assaly wrote:
> I am using ASP .NET along to render my reports. I've extended the
web
> service class such that I specify the report folder, and I get all
> reports and their respective parameters. I then dyncamically create
> the controls (such as datepicker, textbox, etc...) based on the
> Parameter Name, and Type. The drop down list is the one giving me
the
> hardest time though.
> My problem is this: I have a Report with 3 parameters. The first 2
> are dates. I can retrive all info on them just fine. The name,
> prompt, and type (datetime). The third parameter (AppUserKey)
however
> is a dropdown list of all the users. I wrote a stored procedure that
> does this called spGetAppUsers. Here is the structure of this
> parameter as per the RDL file:
> </ReportParameters>
> ...
> ...
> <ReportParameter Name="AppUserKey">
> <DataType>Integer</DataType>
> <DefaultValue>
> <DataSetReference>
> <DataSetName>spGetAppUsers</DataSetName>
> <ValueField>AppUserKey</ValueField>
> </DataSetReference>
> </DefaultValue>
> <Prompt>AppUserKey</Prompt>
> <ValidValues>
> <DataSetReference>
> <DataSetName>spGetAppUsers</DataSetName>
> <ValueField>AppUserKey</ValueField>
> <LabelField>AppUserName</LabelField>
> </DataSetReference>
> </ValidValues>
> </ReportParameter>
> </ReportParameters>
> I can get the Name, and even from the ValidValues, the ValueField and
> LabelField, however, I want the <DataSetName> entry.
> This is so that after I dynamically create the drop down list, I'm
> able to populate it via the stored procedure. Recall that the
> ReportParameter class is defined here:
>
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/RSPROG/htm/rsp_ref_soapapi_ir_5zec.asp
> ReportParameter::QueryParameter is a boolean property. Doesn't
> actually return the name. Just whether or not you are using a query.
> ReportParameter::DefaultValues is a string but is empty, since the
> report hasn't executed the stored procedure (makes sense).
> I want this to be a generic solution. Hence all this trouble to get
> all the "givens" from the Report, and to reconstruct it in ASP .NET.
> I need that DataSetName!!! :-S
> Any help is appreciated.
> Thanks for your time,
> Roy