c# - Select value from database based on dropdownlist value -

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i have database table leave_rec(name,date1,leave,ltype), dropdown list , gridview.

i want such that,when select month(e.g. february) in dropdown list gridview should display table values february only(e.g.rohan leuva,2/28/2013,full,casual),means record has month=2 (february).

how overcome issue? tried can display values in gridview @ moment. appriciated.

sqlconnection conn = new sqlconnection(); conn.connectionstring=system.configuration.configurationmanager.connectionstrings["leave"].connectionstring; conn.open(); sqlcommand cmd = new sqlcommand("select date1,leave,ltype leave_rec name='" + dropdownlist1.selectedvalue + "'", conn); sqldataadapter da = new sqldataadapter(cmd); dataset ds = new dataset(); da.fill(ds); gridview1.datasource = ds; gridview1.databind();

the above code displays date1,leave,ltype dropdownlist1.selectedvalue. want have second dropdown in months there. when select february in second one, grid should display value dropdownlist1.selectedvalue february only.

first, query needs this:

select date1, leave, ltype leave_rec month(date1) = 2 // february

then, integrating code: 

sqlcommand cmd = new sqlcommand("select date1, leave, ltype leave_rec month(date1) = @p1", conn); cmd.parameters.add(new sqlparameter("p1", combo.selectedkey));

use parameters instead of string concatenation avoid sql injection, see example here: http://www.dotnetperls.com/sqlparameter

(use own control names "combo.selectedkey", of course)


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