DateTime format to SQL format using C#

Question

I am trying to save the current date time format from C# and convert it to an SQL Server date format like so yyyy-MM-dd HH:mm:ss so I can use it for my UP

Answer 1

Your problem is in the "Date" property that truncates DateTime to date only. You could put the conversion like this:

DateTime myDateTime = DateTime.Now;
string sqlFormattedDate = myDateTime.ToString("yyyy-MM-dd HH:mm:ss"); // <- No Date.ToString()!

Answer 2

I think the problem was the two single quotes missing.

This is the sql I run to the MSSMS:

WHERE checktime >= '2019-01-24 15:01:36.000' AND checktime <= '2019-01-25 16:01:36.000'

As you can see there are two single quotes, so your codes must be:

string sqlFormattedDate = "'" + myDateTime.Date.ToString("yyyy-MM-dd") + " " + myDateTime.TimeOfDay.ToString("HH:mm:ss") + "'";

Use single quotes for every string in MSSQL or even in MySQL. I hope this helps.

Answer 3

Let's use the built in SqlDateTime class

new SqlDateTime(DateTime.Now).ToSqlString()

But still need to check for null values. This will throw overflow exception

new SqlDateTime(DateTime.MinValue).ToSqlString()

SqlDateTime overflow. Must be between 1/1/1753 12:00:00 AM and 12/31/9999 11:59:59 PM.

Answer 4

   DateTime date1 = new DateTime();

    date1 = Convert.ToDateTime(TextBox1.Text);
    Label1.Text = (date1.ToLongTimeString()); //11:00 AM
    Label2.Text = date1.ToLongDateString(); //Friday, November 1, 2019;
    Label3.Text = date1.ToString();
    Label4.Text = date1.ToShortDateString();
    Label5.Text = date1.ToShortTimeString();

Answer 5

If you wanna update a table with that DateTime, you can use your SQL string like this example:

int fieldId;
DateTime myDateTime = DateTime.Now
string sql = string.Format(@"UPDATE TableName SET DateFieldName='{0}' WHERE FieldID={1}", myDateTime.ToString("yyyy-MM-dd HH:mm:ss"), fieldId.ToString());

Answer 6

Your first code will work by doing this

DateTime myDateTime = DateTime.Now;
string sqlFormattedDate = myDateTime.ToString("yyyy-MM-dd HH:mm:ss"); //Remove myDateTime.Date part