I have an array of datarow . Is there a performance efficient way of
deriving a datatable oject
containing only the rows in my array. ?
I want to avoid uding foreach .
Many thanks
JB
6  10954 
where did you get the array of datarows?? the only way i know of is
looping through them and using dt.Rows.Add(... ); if there's a better
way, i'd also like to know...
if there's a better way, i'd also like to know...
Here is the code:
DataSet ds=GetDataSet() ;
DataTable dt=ds.Tables[0];
int i=5, j=11;
if(dt.Rows.Coun t-i>0)
{
DataRow[] selectedRows=ne w DataRow[(j-i)];
for(int index=0; index<selectedR ows.Length; index++)
{
selectedRows[index]=dt.Rows[i+index];
}
return selectedRows;
Hi,
What about using a DataView ?
Cheers,
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"jensen bredal" <je***********@ yahoo.dk> wrote in message
news:e5******** ******@TK2MSFTN GP10.phx.gbl... if there's a better way, i'd also like to know...
Here is the code:
DataSet ds=GetDataSet() ;
DataTable dt=ds.Tables[0];
int i=5, j=11;
if(dt.Rows.Coun t-i>0)
{
DataRow[] selectedRows=ne w DataRow[(j-i)];
for(int index=0; index<selectedR ows.Length; index++)
{
selectedRows[index]=dt.Rows[i+index];
}
return selectedRows;
"Ignacio Machin ( .NET/ C# MVP )" <ignacio.mach in AT dot.state.fl.us > wrote
in message news:uq******** *****@TK2MSFTNG P15.phx.gbl... Hi,
What about using a DataView ?
Could you please explain based on the code posted earlier?
JB
Basically, it would be along the lines of:
DataSet ds=GetDataSet() ;
DataTable dt=ds.Tables[0];
DataView dv = new DataView(dt, "filter expression", "sort expression",
DataViewRowStat e.CurrentRows)
return dv;
where "filter expression" would be exactly as you'd write it in a WHERE
clause, and sort expression just as you'd write it in a ORDER BY.
Presumably, you have a better way of expressing the subset you want to
filter on, than "rows 5 thru 11"/
--
--
Truth,
James Curran
[erstwhile VC++ MVP]
Home: www.noveltheory.com Work: www.njtheater.com
Blog: www.honestillusion.com Day Job: www.partsearch.com
"jensen bredal" <je***********@ yahoo.dk> wrote in message
news:uj******** ******@TK2MSFTN GP12.phx.gbl...
"Ignacio Machin ( .NET/ C# MVP )" <ignacio.mach in AT dot.state.fl.us >
wrote in message news:uq******** *****@TK2MSFTNG P15.phx.gbl... Hi,
What about using a DataView ?
Could you please explain based on the code posted earlier?
JB
> Presumably, you have a better way of expressing the subset you want to
filter on, than "rows 5 thru 11"/
--
That is the problem. I see no obvious way of doing this through a sort
expression.
5 through 11 is in fact almost what i'm trying to do. I have a datatable
with n rows.
each time i only wnat to subtract a subset and the nex subset the next time
and so on.
I see no obvious way to this with sql.
Do you?
JB This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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