How can I save time to sql Time DataType

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hi.I'm beginner in c# and I have a lot of problem with this Time type:

1:How I convert "hh:mm"(got from TextBox) in string format--->to exactly "hh:mm:ss" in DateTime Format
2:How I convert "hh:mm:ss" in DateTime format---> to Sql DataType Time(7)
3.How I convert "hh:mm:ss" in Time(7) DataType---> to Datatime in exactly this formt"hh:mm:ss"
4.to show Time to user How I conver "hh:mm:ss" to "hh:mm"

Posted 3-Feb-14 21:00pm

mit62

Updated 3-Feb-14 22:19pm

v4

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Herman<T>.Instance 4-Feb-14 3:28am

"saving time in SqlDataReader" ???

mit62 4-Feb-14 4:19am

I improve question

2 solutions

Solution 1

I'm not sure about your requirement but, probably there is no need for the user to enter the time. You can get the date time instantly from the server on form submission.

Follow the links, which might help you to convert the date time in different formats.

http://blog.sqlauthority.com/2012/11/21/sql-server-display-datetime-in-specific-format-sql-in-sixty-seconds-033-video/[^]

http://msdn.microsoft.com/en-us/library/system.datetime.now(v=vs.110).aspx[^]

Posted 3-Feb-14 21:57pm

Vamsi Krishnna

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OriginalGriff · Accepted Answer · 2014-02-03T21:59:00

First, convert it to a TimeSpan object:

C#

string timeFromYourTextBox = "14:37";
TimeSpan time = TimeSpan.Parse(timeFromYourTextBox);

Then, pass it through to SQL via a parameter in the normal way:

C#

using (SqlConnection con = new SqlConnection(strConnect))
    {
    con.Open();
    using (SqlCommand com = new SqlCommand("INSERT INTO myTable (myTimeColumn) VALUES (@THETIME)", con))
        {
        com.Parameters.AddWithValue("@THETIME", time);
        com.ExecuteNonQuery();
        }
    }

I defined a field in which represent entrance time of people to company.I want save this time in a short style "hh:mm:ss" to my sql Database.so I choosed Time(7) Data type in sql and TimeStamp Type in C# class.now I need to know How Convert time from TimeStamp to Time(7) in sql and vice versa.

Timespan and Time are interchangeable: just pass a TimeSpan as a Parameter in your INSERT or UPDATE command, and SQL will understand it as a Time.
Similarly, just read the Time back from SQL via a SELECT, and cast it to a TimeSpan - the system will take care of it. So, if Id is INT, and TimeStamp is TIME(7):

C#

using (SqlConnection con = new SqlConnection(@"Data Source=GRIFFPC\SQLEXPRESS;Initial Catalog=Testing;Integrated Security=True"))
    {
    con.Open();
    for (int i = 0; i < 5; i++)
        {
        using (SqlCommand cmd = new SqlCommand("INSERT INTO myTable2 (Id, TimeStamp) VALUES (@ID, @TS)", con))
            {
            cmd.Parameters.AddWithValue("@ID", i);
            cmd.Parameters.AddWithValue("@TS", new TimeSpan(1, i, 30));
            cmd.ExecuteNonQuery();
            }
        }
    }

And:

C#

using (SqlConnection con = new SqlConnection(@"Data Source=GRIFFPC\SQLEXPRESS;Initial Catalog=Testing;Integrated Security=True"))
    {
    con.Open();
    using (SqlCommand cmd = new SqlCommand("SELECT Id, TimeStamp FROM myTable2", con))
        {
        using (SqlDataReader read = cmd.ExecuteReader())
            {
            while (read.Read())
                {
                int id = (int)read["Id"];
                TimeSpan ts = (TimeSpan)read["TimeStamp"];
                Console.WriteLine("{0}:{1}", id, ts);
                }
            }
        }
    }