计算当前的datetime:

DateTime theDate = DateTime.UtcNow;

string custom = theDate.ToString("d");

MessageBox.Show(custom);

计算当前的datetime:

DateTime theDate = DateTime.UtcNow;

string custom = theDate.ToString("d");

MessageBox.Show(custom);

试试这个:

DateTime.Now.ToString("HH:mm:ss tt");

对于其他格式，您可以检查这个网站:c# DateTime格式

试试这个。它为我工作在3tier架构Web应用程序。

"'" + DateTime.Now.ToString() + "'"

请记住插入查询中的单引号。

例如:

string Command = @"Insert Into CONFIG_USERS(smallint_empID,smallint_userID,str_username,str_pwd,str_secquestion,str_secanswer,tinyint_roleID,str_phone,str_email,Dt_createdOn,Dt_modifiedOn) values ("
 + u.Employees + ","
 + u.UserID + ",'"
 + u.Username + "','"
 + u.GetPassword() + "','"
 + u.SecQ + "','"
 + u.SecA + "',"
 + u.RoleID + ",'"
 + u.Phone + "','"
 + u.Email + "','"
 + DateTime.Now.ToString() + "','"
 + DateTime.Now.ToString() + "')";

行尾的DateTime插入。

使用String.Format()的另一个选项

string.Format("{0:HH:mm:ss tt}", DateTime.Now)

DateTime.Now.ToString("yyyy-MM-dd h:mm:ss tt");

试着用它来满足你的需要