Re: Performace problem with DataView.RowFilter

From: W.G. Ryan eMVP (WilliamRyan_at_NoSpam.gmail.com)
Date: 01/17/05 

Date: Sun, 16 Jan 2005 23:04:44 -0500

Well, every time I've seen. On this in particular though - the difference
is pretty nuts in a lot of cases. That's definitely one of those 'tips'
that is pure gold. 

-- 
W.G. Ryan MVP (Windows Embedded)
TiBA Solutions
www.tibasolutions.com | www.devbuzz.com | www.knowdotnet.com
"Sahil Malik" <contactmethrumyblog@nospam.com> wrote in message
news:e6rbNxD$EHA.1264@TK2MSFTNGP12.phx.gbl...
> I'm not always dead right :-), but thanks anyway :-)
>
> - Sahil Malik
> http://dotnetjunkies.com/weblog/sahilmalik
>
>
>
>
> "W.G. Ryan eMVP" <WilliamRyan@NoSpam.gmail.com> wrote in message
> news:ejdQm0B$EHA.3596@TK2MSFTNGP12.phx.gbl...
> > Joe - Sahil is dead right on this (as always) - I had reset the filters
a
> > while ago on 2,000+ rows - then redid it using GetChildRows - it went
from
> > taking around 12 seconds to complete to less than one.  Night and day
> > there.
> >
> > -- 
> > W.G. Ryan MVP (Windows Embedded)
> >
> > TiBA Solutions
> > www.tibasolutions.com | www.devbuzz.com | www.knowdotnet.com
> > "Joe" <J_no_spam@_no_spam_Fishinbrain.com> wrote in message
> > news:#qca2VA$EHA.3840@tk2msftngp13.phx.gbl...
> >>
> >> Not sure what group this question is better suited for so I sent it to
> > both.
> >>
> >> I have a DataTable which contains 1545 rows. I have a method that
returns
> > a
> >> DataTable of distinct rows based on one column. This table ends up with
> > 386
> >> rows.
> >>
> >> I need to loop through the smaller table and filter a DataView based on
> > each
> >> row from this table.
> >> This loops takes ~5 secs. Is there anyway to improve this?
> >>
> >> DataTable dt = SelectDistinctValues(...); // returns a table with 386
> >> rows
> >> foreach (DataRow dr in dt.Rows)
> >> {
> >>
> >> dv.RowFilter = string.Format("value = '{0}'", dr[0].ToString() );
> >>
> >>  foreach (DataRowView drv in dv)
> >>  {
> >>  ...
> >>  }
> >> }
> >>
> >>
> >
> >
>
>

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