Check if a record exists in the database

Question

I am using these lines of code to check if the record exists or not.

SqlCommand check_User_Name = new SqlCommand(\"SELECT * FROM Table WHERE ([user] = \'\" +         


        

Answer 1

sqlConnection.Open();
using (var sqlCommand = new SqlCommand("SELECT COUNT(*) FROM Table WHERE ([user] = '" + txtBox_UserName.Text + "'", sqlConnection))
{

    SqlDataReader reader = sqlCommand.ExecuteReader();
    if (reader.HasRows)
    {
        lblMessage.Text ="Record Already Exists.";

    }
    else
    {
        lblMessage.Text ="Record Not Exists.";
    }

    reader.Close();
    reader.Dispose();
}

sqlConnection.Close();