TextBox does not update when drop down list selection changes

Question

I have drop down list the user can select a client name from. Once the client is selected and the "view report" button is clicked it the report has a textbox that displays the Client name or it is supposed too.
The report will display the first client name but any subsequent client name does not display on the first. I am pretty sure that is because I have chosen the "Dataset" where the both the "values' have "first" in front of the field.
How do I get the textbox to update to match as each client is chosen from the drop down list? I cannot use the report "parameter" I am passing to the stored procedure because the drop down list's parameter is the database name not the client
name.
Any help is appreciated.
Thanks,
Sue

Answer 1

Okay, sorry but I am just getting back to my report. I still cannot display the Client Name in a text box at the top of my report. The textbox must be dynamic because my client name can be one of many that is picked from a drop down list box.
I added a textbox and tried to use the "join" with my Parameter - clientname.
In the textbox expression I used the following:
=JOIN(First(Fields!ClientName.Value,
"GetDatabaseName"),",")
I got this error message:
[rsRuntimeErrorInExpression] The Value expression for the textrun Textbox1.Paragraphs[0].TextRuns[0] contains an error: Overload resolution failed because no Public 'Join' can be called with these arguments:
    'Public Shared Function Join(SourceArray As String(), [Delimiter As String =  ]) As String':
        Argument matching parameter 'SourceArray' cannot convert from 'String' to 'String()'.
    'Public Shared Function Join(SourceArray As System.Object(), [Delimiter As String =  ]) As String':
        Argument matching parameter 'SourceArray' cannot convert from 'String' to 'Object()'.
Preview complete -- 0 errors, 1 warnings
I also tried setting up a "filter" on the clientname using these instructions
Right-click the dataset (GetDatabaseName) to open the Dataset Properties.
Click Filters in the left pane, add a filter like below:
Expression:[DBName]
Operator: In(multiple-parameter) or =(signal-parameter)
Value:[@DBName]
I get an error message too which I am not even going to display.
I can set it up and run it as long as I don't want to change the value in the "textbox" to match the value in the drop down list. I am totally frustrated at this point. Why won't it work?
Simply put - I want the value selected in my drop down list box to match the value in my textbox at the top of my report if drop down list says "Susie" then I want "Susie" in my textbox or if drop down changes to "Bobby" then I want Bobby to show up in my
textbox when I generate my report.
Any suggestions of what else I may need to try?
Thanks for the help.
Sue
Sue