Multi-Select Error, easy question

I am trying to show/hide a table based on a multi-select parameter in VS 2005
beta 2.
In the parameter I have the following:
Data Type: String
Multi-value - checked
Label: General Info
Value: GeneralInfo
In the properties for the report I have the following under Visibility:
=IIF(Parameters!DisplayInfo.Value = "GeneralInfo", False, True)
When I execute the report and choose the only parameter value I get the
following. (once I get this to work I will add additional parameters)
Error:
Processing Error
"The Hidden expression for the table 'Table_Header' contains an error:
Overload resolution failed because no Public '=' can be called with these
arguments:
Public Shared Operator =(a As String, b As String) As Boolen':
Argument matching parameter 'a' connot convert from 'Object()' to 'String'.
Thanks!!!
--
Thank You!Once you mark a parameter as "multi-value", the .Value property will return
an object[] with all selected values. If only one value is selected, it will
be an object array of length = 1. Object arrays cannot be directly compared
with Strings.
To access individual values of a multi value parameter you can use
expressions like this:
=Parameters!MVP1.IsMultiValue
boolean flag - tells if a parameter is defined as multi value
=Parameters!MVP1.Count
returns the number of values in the array
=Parameters!MVP1.Value(0)
returns the first selected value
=Join(Parameters!MVP1.Value)
creates a space separated list of values
=Join(Parameters!MVP1.Value, ", ")
creates a comma separated list of values
=Split("a b c", " ")
to create a multi value object array from a string (this can be used
e.g. for drillthrough parameters, subreports, or query parameters)
See also MSDN:
* http://msdn.microsoft.com/library/en-us/vblr7/html/vafctjoin.asp
* http://msdn.microsoft.com/library/en-us/vbenlr98/html/vafctsplit.asp
-- Robert
This posting is provided "AS IS" with no warranties, and confers no rights.
"Shane Eckel" <ShaneEckel@.discussions.microsoft.com> wrote in message
news:5D2D2514-991E-4D75-87AE-DDC546D171A9@.microsoft.com...
>I am trying to show/hide a table based on a multi-select parameter in VS
>2005
> beta 2.
> In the parameter I have the following:
> Data Type: String
> Multi-value - checked
> Label: General Info
> Value: GeneralInfo
> In the properties for the report I have the following under Visibility:
> =IIF(Parameters!DisplayInfo.Value = "GeneralInfo", False, True)
> When I execute the report and choose the only parameter value I get the
> following. (once I get this to work I will add additional parameters)
>
> Error:
> Processing Error
> "The Hidden expression for the table 'Table_Header' contains an error:
> Overload resolution failed because no Public '=' can be called with these
> arguments:
> Public Shared Operator =(a As String, b As String) As Boolen':
> Argument matching parameter 'a' connot convert from 'Object()' to
> 'String'.
> Thanks!!!
> --
> Thank You!|||Robert, thanks my man, thanks for taking the time to respond. I'll try this
out first thing tomorrow.
Thanks!
Shane
--
Thank You!
"Robert Bruckner [MSFT]" wrote:
> Once you mark a parameter as "multi-value", the .Value property will return
> an object[] with all selected values. If only one value is selected, it will
> be an object array of length = 1. Object arrays cannot be directly compared
> with Strings.
> To access individual values of a multi value parameter you can use
> expressions like this:
> =Parameters!MVP1.IsMultiValue
> boolean flag - tells if a parameter is defined as multi value
> =Parameters!MVP1.Count
> returns the number of values in the array
> =Parameters!MVP1.Value(0)
> returns the first selected value
> =Join(Parameters!MVP1.Value)
> creates a space separated list of values
> =Join(Parameters!MVP1.Value, ", ")
> creates a comma separated list of values
> =Split("a b c", " ")
> to create a multi value object array from a string (this can be used
> e.g. for drillthrough parameters, subreports, or query parameters)
> See also MSDN:
> * http://msdn.microsoft.com/library/en-us/vblr7/html/vafctjoin.asp
> * http://msdn.microsoft.com/library/en-us/vbenlr98/html/vafctsplit.asp
> -- Robert
> This posting is provided "AS IS" with no warranties, and confers no rights.
>
> "Shane Eckel" <ShaneEckel@.discussions.microsoft.com> wrote in message
> news:5D2D2514-991E-4D75-87AE-DDC546D171A9@.microsoft.com...
> >I am trying to show/hide a table based on a multi-select parameter in VS
> >2005
> > beta 2.
> >
> > In the parameter I have the following:
> > Data Type: String
> > Multi-value - checked
> > Label: General Info
> > Value: GeneralInfo
> >
> > In the properties for the report I have the following under Visibility:
> > =IIF(Parameters!DisplayInfo.Value = "GeneralInfo", False, True)
> >
> > When I execute the report and choose the only parameter value I get the
> > following. (once I get this to work I will add additional parameters)
> >
> >
> > Error:
> > Processing Error
> > "The Hidden expression for the table 'Table_Header' contains an error:
> > Overload resolution failed because no Public '=' can be called with these
> > arguments:
> > Public Shared Operator =(a As String, b As String) As Boolen':
> > Argument matching parameter 'a' connot convert from 'Object()' to
> > 'String'.
> >
> > Thanks!!!
> >
> > --
> > Thank You!
>
>|||Robert, thanks for your reply. Very valuable information for this report and
for my future reports.
You wrote, "Object arrays cannot be directly compared with strings." Do you
know how I could do this 'indirectly'?
Let's say the user selects 'GeneralInfo' and 'Contact Info' in the
multi-select. Do you know of a way to evaluate their selection so I can take
action on it? (such as visability)
Thanks again for your help.
Shane
--
Thank You!
"Robert Bruckner [MSFT]" wrote:
> Once you mark a parameter as "multi-value", the .Value property will return
> an object[] with all selected values. If only one value is selected, it will
> be an object array of length = 1. Object arrays cannot be directly compared
> with Strings.
> To access individual values of a multi value parameter you can use
> expressions like this:
> =Parameters!MVP1.IsMultiValue
> boolean flag - tells if a parameter is defined as multi value
> =Parameters!MVP1.Count
> returns the number of values in the array
> =Parameters!MVP1.Value(0)
> returns the first selected value
> =Join(Parameters!MVP1.Value)
> creates a space separated list of values
> =Join(Parameters!MVP1.Value, ", ")
> creates a comma separated list of values
> =Split("a b c", " ")
> to create a multi value object array from a string (this can be used
> e.g. for drillthrough parameters, subreports, or query parameters)
> See also MSDN:
> * http://msdn.microsoft.com/library/en-us/vblr7/html/vafctjoin.asp
> * http://msdn.microsoft.com/library/en-us/vbenlr98/html/vafctsplit.asp
> -- Robert
> This posting is provided "AS IS" with no warranties, and confers no rights.
>
> "Shane Eckel" <ShaneEckel@.discussions.microsoft.com> wrote in message
> news:5D2D2514-991E-4D75-87AE-DDC546D171A9@.microsoft.com...
> >I am trying to show/hide a table based on a multi-select parameter in VS
> >2005
> > beta 2.
> >
> > In the parameter I have the following:
> > Data Type: String
> > Multi-value - checked
> > Label: General Info
> > Value: GeneralInfo
> >
> > In the properties for the report I have the following under Visibility:
> > =IIF(Parameters!DisplayInfo.Value = "GeneralInfo", False, True)
> >
> > When I execute the report and choose the only parameter value I get the
> > following. (once I get this to work I will add additional parameters)
> >
> >
> > Error:
> > Processing Error
> > "The Hidden expression for the table 'Table_Header' contains an error:
> > Overload resolution failed because no Public '=' can be called with these
> > arguments:
> > Public Shared Operator =(a As String, b As String) As Boolen':
> > Argument matching parameter 'a' connot convert from 'Object()' to
> > 'String'.
> >
> > Thanks!!!
> >
> > --
> > Thank You!
>
>|||Hi Robert, don't worry about replying again. I think I figured it out. I
need to split it after I join it, right?
--
Thank You!
"Robert Bruckner [MSFT]" wrote:
> Once you mark a parameter as "multi-value", the .Value property will return
> an object[] with all selected values. If only one value is selected, it will
> be an object array of length = 1. Object arrays cannot be directly compared
> with Strings.
> To access individual values of a multi value parameter you can use
> expressions like this:
> =Parameters!MVP1.IsMultiValue
> boolean flag - tells if a parameter is defined as multi value
> =Parameters!MVP1.Count
> returns the number of values in the array
> =Parameters!MVP1.Value(0)
> returns the first selected value
> =Join(Parameters!MVP1.Value)
> creates a space separated list of values
> =Join(Parameters!MVP1.Value, ", ")
> creates a comma separated list of values
> =Split("a b c", " ")
> to create a multi value object array from a string (this can be used
> e.g. for drillthrough parameters, subreports, or query parameters)
> See also MSDN:
> * http://msdn.microsoft.com/library/en-us/vblr7/html/vafctjoin.asp
> * http://msdn.microsoft.com/library/en-us/vbenlr98/html/vafctsplit.asp
> -- Robert
> This posting is provided "AS IS" with no warranties, and confers no rights.
>
> "Shane Eckel" <ShaneEckel@.discussions.microsoft.com> wrote in message
> news:5D2D2514-991E-4D75-87AE-DDC546D171A9@.microsoft.com...
> >I am trying to show/hide a table based on a multi-select parameter in VS
> >2005
> > beta 2.
> >
> > In the parameter I have the following:
> > Data Type: String
> > Multi-value - checked
> > Label: General Info
> > Value: GeneralInfo
> >
> > In the properties for the report I have the following under Visibility:
> > =IIF(Parameters!DisplayInfo.Value = "GeneralInfo", False, True)
> >
> > When I execute the report and choose the only parameter value I get the
> > following. (once I get this to work I will add additional parameters)
> >
> >
> > Error:
> > Processing Error
> > "The Hidden expression for the table 'Table_Header' contains an error:
> > Overload resolution failed because no Public '=' can be called with these
> > arguments:
> > Public Shared Operator =(a As String, b As String) As Boolen':
> > Argument matching parameter 'a' connot convert from 'Object()' to
> > 'String'.
> >
> > Thanks!!!
> >
> > --
> > Thank You!
>
>|||Yes. The Join() will create a string from a multi dimensional object array.
The Split() function is the inverse function; it splits the string into a
multi dimensional array.
-- Robert
This posting is provided "AS IS" with no warranties, and confers no rights.
"Shane Eckel" <ShaneEckel@.discussions.microsoft.com> wrote in message
news:05BDA0D3-9D01-4C62-A844-99FE9F2BD791@.microsoft.com...
> Hi Robert, don't worry about replying again. I think I figured it out. I
> need to split it after I join it, right?
> --
> Thank You!
>
> "Robert Bruckner [MSFT]" wrote:
>> Once you mark a parameter as "multi-value", the .Value property will
>> return
>> an object[] with all selected values. If only one value is selected, it
>> will
>> be an object array of length = 1. Object arrays cannot be directly
>> compared
>> with Strings.
>> To access individual values of a multi value parameter you can use
>> expressions like this:
>> =Parameters!MVP1.IsMultiValue
>> boolean flag - tells if a parameter is defined as multi value
>> =Parameters!MVP1.Count
>> returns the number of values in the array
>> =Parameters!MVP1.Value(0)
>> returns the first selected value
>> =Join(Parameters!MVP1.Value)
>> creates a space separated list of values
>> =Join(Parameters!MVP1.Value, ", ")
>> creates a comma separated list of values
>> =Split("a b c", " ")
>> to create a multi value object array from a string (this can be used
>> e.g. for drillthrough parameters, subreports, or query parameters)
>> See also MSDN:
>> * http://msdn.microsoft.com/library/en-us/vblr7/html/vafctjoin.asp
>> * http://msdn.microsoft.com/library/en-us/vbenlr98/html/vafctsplit.asp
>> -- Robert
>> This posting is provided "AS IS" with no warranties, and confers no
>> rights.
>>
>> "Shane Eckel" <ShaneEckel@.discussions.microsoft.com> wrote in message
>> news:5D2D2514-991E-4D75-87AE-DDC546D171A9@.microsoft.com...
>> >I am trying to show/hide a table based on a multi-select parameter in VS
>> >2005
>> > beta 2.
>> >
>> > In the parameter I have the following:
>> > Data Type: String
>> > Multi-value - checked
>> > Label: General Info
>> > Value: GeneralInfo
>> >
>> > In the properties for the report I have the following under Visibility:
>> > =IIF(Parameters!DisplayInfo.Value = "GeneralInfo", False, True)
>> >
>> > When I execute the report and choose the only parameter value I get the
>> > following. (once I get this to work I will add additional parameters)
>> >
>> >
>> > Error:
>> > Processing Error
>> > "The Hidden expression for the table 'Table_Header' contains an error:
>> > Overload resolution failed because no Public '=' can be called with
>> > these
>> > arguments:
>> > Public Shared Operator =(a As String, b As String) As Boolen':
>> > Argument matching parameter 'a' connot convert from 'Object()' to
>> > 'String'.
>> >
>> > Thanks!!!
>> >
>> > --
>> > Thank You!
>>