check sqldatareader is null code example

Example 1: sql is not null

The reverse of NULL. Tests for values that aren’t empty / NULL
"Tests for empty (NULL) values.
Example: Returns users that haven’t given a contact number.
SELECT * FROM users
WHERE contact_number IS NULL;"

Example 2: can sqldatareader be null

if (myReader.HasRows) //The key Word is **.HasRows**
{
    ltlAdditional.Text = "Contains data";
}
else
{   
    ltlAdditional.Text = "Is null Or Empty";
}