how to filter data in dataview.

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I ma getting this error Cannot perform '<=' operation on System.String and System.Double

C#

string date = System.DateTime.Today.ToString("dd/MM/yyyy"); 
DataTable dtCopyTemplates = drTemplates.CopyToDataTable();
string matching = "LastDate <=" + date ;
DataView dv = new DataView(dtCopyTemplates, matching, "", DataViewRowState.CurrentRows);

plz help me.

Posted 8-Dec-11 0:48am

Amod Kumar Jaiswal

Updated 8-Dec-11 17:35pm

Eduard Lu

v3

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**AmitGajjar** · Answer 1 · 2011-12-08T01:59:00

Solution 2

Hi,

you should not do string matching with Date and time,

if you would like to do that then you need consider 2 things
1) it should be in yyyyMMdd format
2) it should be of type double not string.

hope you got my point,

thanks
-Amit.

Posted 8-Dec-11 1:59am

AmitGajjar

Jephunneh Malazarte · Answer 2 · 2011-12-08T05:25:00

Solution 3

try using Linq: http://msdn.microsoft.com/en-us/library/bb669073.aspx[^]

refer to the second to the last example.

Posted 8-Dec-11 5:25am

Jephunneh Malazarte

NandaKumer · Answer 3 · 2011-12-08T07:06:00

Solution 4

look this code project Q/A how to filter data from data table to compair with date.[^]
--NDK

Posted 8-Dec-11 7:06am

NandaKumer

MarqW · Answer 4 · 2011-12-08T01:39:00

Solution 1

You need to surround your date string in single quotes, as shown below

string matching = "LastDate <= '" + date + "'";

Posted 8-Dec-11 1:39am

MarqW

v2

Comments

Amod Kumar Jaiswal 8-Dec-11 7:41am

i did this.
it's filler all records from data table.
i want filter only date less then current date.

nilesh ubhe · Answer 5 · 2011-12-08T18:11:00

Solution 5

Hey try this

string matching = "LastDate <='" + date.ToString() +"'"
keep remaining as it is.

Posted 8-Dec-11 18:11pm

nilesh ubhe

Comments

Amod Kumar Jaiswal 9-Dec-11 7:22am

i did this.
it's filler all records from data table.
i want filter only date less then current date.