哪位知道什么时候用静态方法
什么时候用实例方法
public void Update(AccountInfo myAccount) {
SqlParameter[] accountParms = GetAccountParameters();
SqlParameter[] profileParms = GetProfileParameters();
SetAccountParameters(accountParms, myAccount);
SetProfileParameters(profileParms, myAccount);
using (SqlConnection conn = new SqlConnection(SQLHelper.CONN_STRING_NON_DTC)) {
conn.Open();
using (SqlTransaction trans = conn.BeginTransaction()) {
try {
SQLHelper.ExecuteNonQuery(trans, CommandType.Text, SQL_UPDATE_ACCOUNT, accountParms);
SQLHelper.ExecuteNonQuery(trans, CommandType.Text, SQL_UPDATE_PROFILE, profileParms);
trans.Commit();
}catch {
trans.Rollback();
throw;
}
}
}
}
上面这个没有用静态
而下面却用了
public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms) {
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
设计静态，实例方法有个标准吗？？？？
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