how to control the database searching process

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How to control the database searching?
if we make a search process through the user id stored in the database, so we search for a specific id, i need to control the if statement like that

if ( id exist)
{ do some thing}
else //not exist
{do some thing}

i am using c#
please write in code

database is access

Posted 17-Jul-11 8:19am

Ibraheim Gaber

Updated 17-Jul-11 9:56am

Uday P.Singh

v2

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Uday P.Singh · Accepted Answer · 2011-07-17T09:26:00

Solution 2

try this:

C#

SqlCommand cmd = new SqlCommand("SELECT name FROM myTable WHERE id=1", con);
string resultedname = (string)cmd.ExecuteScalar();
if (resultedname!="")
   {
   // id Exists
   }
else
{
 // id does not Exists
}

hope it helps :)
for further queries comment here!!

Posted 17-Jul-11 9:26am

Uday P.Singh

Updated 17-Jul-11 9:45am

v2

Comments

Manfred Rudolf Bihy 17-Jul-11 15:42pm

ExecuteScaler? A typo I suspect.

Uday P.Singh 17-Jul-11 15:46pm

yes Manfred thanks for correcting me , i updated the answer

Manfred Rudolf Bihy 17-Jul-11 18:08pm

My 5!

Uday P.Singh 18-Jul-11 1:12am

thanks Manfred :)

Espen Harlinn 17-Jul-11 18:32pm

Nice and simple, my 5

Uday P.Singh 18-Jul-11 1:12am

thanks Espern :)

OriginalGriff · Accepted Answer · 2011-07-17T08:53:00

Solution 1

Try:

SqlCommand cmd = new SqlCommand("SELECT * FROM myTable WHERE id=1234", con);
SqlDataReader r = cmd.ExecuteReader();
if (r.Read())
   {
   // id Exists
   }

Posted 17-Jul-11 8:53am

OriginalGriff

Comments

Espen Harlinn 17-Jul-11 18:32pm

Nice and simple, my 5