Reading Crystal parameters

Question

I am writting a Crystal application, where users could run adhoc reports and schedule them. My AdHoc options works fine, but I am having some issues with the Scheduling portion. In my project, to read the parameters, I am using CrystalReportsPartsViewer control. Once I load the report to my session object and apply all the logon information, I issue the following command to display the parameters.
crptPartsViewer.ReportSource = Session("myReport")
Once the user enters the parameters and click on OK button, I read the parameters in the event PreRender of the CrystalReportsPartsViewer control and save them in the database for the schedular to read and process.
following is a portion of the parameter reading code:
Dim myParameterFields As New ParameterFields  
myParameterFields = rptPartsViewer.ParameterFieldInfo  
Dim MyparamField As New ParameterField  
Dim i As Integer = 0  
Dim strParamName As String = "" 
Dim strParameterType As String 
Dim strValues As String = "" 
For i = 0 To myParameterFields.Count - 1  
    strParamName = myParameterFields.Item(i).Name  
    MyparamField.CurrentValues = myParameterFields.Item(i).CurrentValues  
    strParameterType = myParameterFields.Item(i).ParameterValueType  
    Dim myParameterdiscrVal As New ParameterDiscreteValue  
    Dim myParameterRangeVal As New ParameterRangeValue  
    Dim bIsRangeValue As Boolean = False 
    Dim j As Integer = 0  
    For j = 0 To MyparamField.CurrentValues.Count - 1  
        If MyparamField.CurrentValues.Item(j).IsRange = True Then 
            bIsRangeValue = True 
            myParameterRangeVal = MyparamField.CurrentValues.Item(j)  
            strValues = strValues & myParameterRangeVal.StartValue & "@^" & myParameterRangeVal.EndValue  
        Else 
            myParameterdiscrVal = MyparamField.CurrentValues.Item(j)  
            strValues = strValues & "@^" & myParameterdiscrVal.Value  
        End If 
    Next 
My issue is, this works on and off. It works 9/10 times and stops working for a little while and starts working again. I thought of using CrystalReportsViewer control, but when the user clicks ok, reportsviewer starts processing the report. So i am using the partsviewer.
I am not sure whether this is the way to do it (read parameters without processing the report), but this is the only way that I could come up with. Could any one let me know whether there a better way for reading the parameters, once they are entered? Or am I doing it correct?
Any help is greatly appreciated.

Answer 1

Can you clarify which version of crystal reports you are using.  I know in XIr2 and earlier, it took 2 postbacks before these values were accessible.  Its not something that is intended to be read though.  To be able to guarantee the value, you would need to create your own prompts.