RowFilter Help, Please ...

  • Thread starter Thread starter Jeff
  • Start date Start date
J

Jeff

Hi -

For my VB.NET app, I have a SQL2K database that I use to create a dataset
with multiple data tables. I've created a dataview (dvReportsTo) of one of
the tables, SCPMaster, and I've bound a combobox control to that dataview.
I'm trying to filter the dataview based on values in a second table
(ReportsTo) in the same dataset, and it's not working.

If it's possible to do this, please help me figure out what I've done wrong
and how to implement this correctly. If I'm trying to do something that is
not supported, I'd appreciate any suggestions of a workaround.

Here's the filter I'm trying to implement:

strFilter = "SCPMasterID <> '" & uidSelectedPerson.ToString & "'"
strFilter &= " AND SCPMasterID NOT IN"
strFilter &= " (SELECT ReportsToStaffID FROM ReportsTo"
strFilter &= " WHERE ReportsToBossID = '" & uidSelectedPerson.ToString &
"')"

frmMain.dvReportsTo.RowFilter = strFilter

Here's the DataException that I'm getting:

System.Data.SyntaxErrorException: Syntax error: Missing operand after
'ReportsToStaffID' operator.
at System.Data.ExpressionParser.Parse()
at System.Data.DataExpression..ctor(String expression, DataTable table,
Type type)
at System.Data.DataExpression..ctor(String expression, DataTable table)
at System.Data.DataFilter..ctor(String expression, DataTable table)
at System.Data.DataView.set_RowFilter(String value)
at StarContactPro_02_DT.modContact.SetReportsToFilter() in d:\Data\Visual
Studio Projects\StarContactPro-02-DT\modContact.vb:line 107"


Thanks for your help.

- Jeff
 
Jeff said:
Here's the filter I'm trying to implement:

strFilter = "SCPMasterID <> '" & uidSelectedPerson.ToString & "'"
strFilter &= " AND SCPMasterID NOT IN"
strFilter &= " (SELECT ReportsToStaffID FROM ReportsTo"
strFilter &= " WHERE ReportsToBossID = '" &
uidSelectedPerson.ToString & "')"

frmMain.dvReportsTo.RowFilter = strFilter

Here's the DataException that I'm getting:

System.Data.SyntaxErrorException: Syntax error: Missing operand
after 'ReportsToStaffID' operator.
at System.Data.ExpressionParser.Parse()
at System.Data.DataExpression..ctor(String expression, DataTable
table,
Type type)
at System.Data.DataExpression..ctor(String expression, DataTable
table) at System.Data.DataFilter..ctor(String expression, DataTable
table)
at System.Data.DataView.set_RowFilter(String value)
at StarContactPro_02_DT.modContact.SetReportsToFilter() in
d:\Data\Visual
Studio Projects\StarContactPro-02-DT\modContact.vb:line 107"
Click to expand...


The Dataview is not a database. You can not execute SQL statements on the
Dataview. The valid syntax for the Rowfilter is described here:

http://msdn.microsoft.com/library/en-us/cpref/html/frlrfSystemDataDataColumnClassExpressionTopic.asp

--
Armin

How to quote and why:
http://www.plig.net/nnq/nquote.html
http://www.netmeister.org/news/learn2quote.html
 
The subquery is the problem. You're going to have to do a dataTable.Select
and loop through the results, building a comma separated list. Then use
that list with Not In. For the complete expression syntax, this may be of
help to you in the future
http://msdn.microsoft.com/library/d...fSystemDataDataColumnClassExpressionTopic.asp

--

W.G. Ryan, eMVP

http://forums.devbuzz.com/
http://www.knowdotnet.com/williamryan.html
http://www.msmvps.com/WilliamRyan/
http://www.devbuzz.com/content/zinc_personal_media_center_pg1.asp
 
Thanks for the instant(!) response, William -

I've tried your suggestion, and there seems to be a problem with the values
in the comma-separated NOT IN list being GUIDs. (I went through the article
you referenced, and I wasn't able to find the correct syntax for this.)
What should I change??

Here's my relevant code:

strStaff = "("
strFilter = "ReportsToBossID = '" & uidSelectedPerson.ToString & "'"
drStaff = frmMain.dsSCP.Tables("ReportsTo").Select(strFilter)

intRows = drStaff.GetUpperBound(0)
For intRow = 0 To intRows
If blnFirstItem Then
blnFirstItem = False
Else
strStaff &= ","
End If
strStaff &= "'" & drStaff(intRow)(0).ToString & "'"
Next
strStaff &= ")"

strFilter = "SCPMasterID <> '" & uidSelectedPerson.ToString & "'"
If intRows > 0 Then strFilter &= " AND SCPMasterID NOT IN " &
strStaff

frmMain.dvReportsTo.RowFilter = strFilter

Thanks for your help.

- Jeff
 
Sure. Here's the value of strFilter:

"SCPMasterID <> '23865682-20c1-11c4-8000-8ea6b5cb2452' AND SCPMasterID NOT
IN
('3ac54427-20c1-11c4-8000-8ea6b5cb2452','3ac54429-20c1-11c4-8000-8ea6b5cb245
2','3ac5442b-20c1-11c4-8000-8ea6b5cb2452','3b5dda80-20c1-11c4-8000-8ea6b5cb2
452','3b5dda82-20c1-11c4-8000-8ea6b5cb2452')"

- Jeff
 
Hi Jeff,

First of all, I would like to confirm my understanding of your issue. From
your description, I understand that you need to filter records that are not
in the Guid list. If there is any misunderstanding, please feel free to let
me know.

Based on my research, the Guid values in the list are strings that cannot
be converted implicitly to Guid. We have to use Convert function to change
it to Guid. Here is an example:

"SCPMasterID <> '23865682-20c1-11c4-8000-8ea6b5cb2452' AND SCPMasterID NOT
IN
(Convert('3ac54427-20c1-11c4-8000-8ea6b5cb2452', 'System.Guid'),
Convert('3ac54429-20c1-11c4-8000-8ea6b5cb2452', 'System.Guid'))"

HTH. If anything is unclear, please feel free to reply to the post.

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."
 
Thanks, Guys -

I've been able to get this to work using William's and Kevin's
recommendations.

- Jeff
 
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