counting data value in database

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If i write the following code:

SqlCommand myCommand = new SqlCommand("select * FROM [student_reg] WHERE [std_id]= 'c101234 ' ", myConnection);

it select all value that hold id=c101234 and but how can I count that how many rows there are that contains the id c101234 in C#...

help to ahead.

thanks in advance.

Posted 28-Mar-14 22:12pm

nest101234

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2 solutions

Solution 2

Visit Here...

retrieving-total-count-from-database-to-c-sharp[^]

Posted 28-Mar-14 22:32pm

Rakesh Meel

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Mehdi Gholam · Accepted Answer · 2014-03-28T22:21:00

Solution 1

Your query should be :

SQL

select count(*) from [student_reg] WHERE [std_id]= 'c101234'

Edit :

Also read this : http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.executescalar%28v=vs.110%29.aspx[^]

Edit 2:

C#

SqlCommand myCommand = new SqlCommand("select count(*) from [student_reg] WHERE [std_id]= 'c101234' ", myConnection);
int count = (Int32) myCommand.ExecuteScalar();

Posted 28-Mar-14 22:21pm

Mehdi Gholam

Updated 28-Mar-14 23:11pm

v3

Comments

nest101234 29-Mar-14 4:42am

I want the counting no to save in a variable. then what will be the code, would you pls help me as my query writen code is in below:

SqlCommand myCommand = new SqlCommand("select count(*) from [student_reg] WHERE [std_id]= 'c101234' ", myConnection); myCommand.ExecuteNonQuery();

@mehdi Gholam

Mehdi Gholam 29-Mar-14 4:43am

See the updated solution.

nest101234 29-Mar-14 4:59am

there is no clear definition, As I am, beginner , pls make me clear by code with detaiols.... thank you

nest101234 29-Mar-14 5:29am

Thanks a lot...................