counting Records in an SQL Table by G.F. Weis Gfw
2024-07-21 02:23:47
供稿：网友
counting records in an sql table by g.f. weis gfw
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i was working on a project using my c# class generator and realized that i had no way to get a count of the number of records in the table. in the past i have used the dataadapter class - easy, but not very efficient.
i ran accross a post on one of the discussion forums and decided to build a new function in my class generator appropriately named recordcount. the function returns an 'int' with the number of records in the table.
m_dbconnection is the connection string to your database
arepresentative is the name of our table
id is unique column used in our table
using the c# class generator, the generated code is as follows:
public int recordcount() // get count of records
{
int reccount=0;
string countcmd = "select count(id) as total from arepresentative ";
sqlconnection m_sqlconnection = new sqlconnection(m_dbconnection);
sqlcommand m_sqlcommand = new sqlcommand(countcmd, m_sqlconnection);
try
{
// open the connection ----------------------------
m_sqlcommand.connection.open();
reccount = (int)m_sqlcommand.executescalar();
} // end try
catch (exception e)
{
throw new exception("error in recordcount() -> " + e.tostring());
}
finally
{
m_sqlconnection.close();
m_sqlcommand.dispose();
}
return reccount;
} // end select
