I have a database connected to c# windows forms application. I want to get a current date and time from database, and then to use that date and time to insert some other data into database.
When I execute a query select now() from WAMP's mySqlConsole I get what I expect: 12-04-17 12:06:28, but when I run that same query from c# and store the value to string like this: String datetime = cmdDatetime.ExecuteScalar().ToString(); the month becomes Apr in which format i cant insert into db.
Is there a way for c# to store mysql datetime in the same format as it is in mysql?
You can use the DateTime object if possible, or else you will need to convert the date time received to the format you want:
DateTime dateTime = (DateTime)cmdDatetime.ExecuteScalar();
string dateTimeString = dateTime.ToString(CultureInfo.InvariantCulture);
Using the InvariantCulture, you will always get the results in the same way, namely in the en-US settings.
Additionally, you can force the specific format too:
string dateTimeString = dateTime.ToString("dd-MM-yyyy HH:mm:ss");
You have to specify the format for example:
DateTime datet = (DateTime)cmdDatetime.ExecuteScalar();
String datetime = datet.ExecuteScalar().ToString( "dd-mm-yyy HH:mm:ss");
Try That:
DateTime datetime = (DateTime)cmdDatetime.ExecuteScalar();
String datetimeStr = datetime.ToString("yyyyMMddHHmmss");
Related
I am trying to format a date. I get the date from the database in the dateTime format and i want to show only the date part not the time.
string date = dt.Rows[0]["declaration_date"].ToString();
string dateFormat = date.ToString("MM/DD/YYYY");
This is not working. Any help?
For date.ToString with formatting to work, date needs to be a DateTime. Try changing your code to something like this:
DateTime date = (DateTime)dt.Rows[0]["declaration_date"];
string dateFormat = date.ToString("MM/dd/yyyy");
Also, your formatting string should be MM/dd/yyyy.
You are doing it almost correctly.
Try this:
string date = dt.Rows[0]["declaration_date"].ToString("MM/dd/yyyy");
The point is that you have to apply .ToString("MM/dd/yy") to a DateTime object, not to a string.
I have a database date "2014-11-26". I have a calender with format(dd-MM-yyyy) I am trying to bring some values to my form from databse by textbox selected date
protected void txtdate_TextChanged(object sender, EventArgs e)
{
//DateTime timeIn = Convert.ToDateTime(txtdate.Text);
// DateTime time1 = DateTime.ParseExact(txtdate.Text, "yyyy-MM-dd", CultureInfo.InvariantCulture);
str = "select TimeIn,TimeOut from MusterRoll where EmpCode='" + ddcode.SelectedItem.Text + "' and Date='"+time1+"'";
dr = conn.query(str);
if (dr.Read())
{
DateTime time = dr.GetDateTime(0);
TimeSelector1.SetTime(time.Hour, time.Minute, TimeSelector1.AmPm);
DateTime time2 = dr.GetDateTime(1);
TimeSelector2.SetTime(time2.Hour, time2.Minute, TimeSelector2.AmPm);
}
}
The problem is databse date format and my calender format is different. I tried two methods(which I placed in command line)but shows error message like "input string was not in correct format". I surfed internet and find these same answers. May I know why it shows error?? i am trying to make database dateformat and calender format as same
First of all, a DateTime doesn't have any implicit format. It has just date and time values. String representations of them can have a format.
I strongly suspect you save your DateTime values with their string representations which is a horrible idea. Read: Bad habits to kick : choosing the wrong data type Pass your DateTime values directly to your parameterized queries instead of their string representations. Anyway..
For;
DateTime timeIn = Convert.ToDateTime(txtdate.Text);
Convert.ToDateTime(string) method uses DateTime.Parse method with your CurrentCulture settings. That means if your string isn't a standard date and time format of your CurrentCulture your code throws FormatException. I guess dd-MM-yyyy is not a standard date and time format of your CurrentCulture.
For;
DateTime time1 = DateTime.ParseExact(txtdate.Text, "yyyy-MM-dd", CultureInfo.InvariantCulture);
When you use DateTime.ParseExact, your string and format should match exactly.
Converts the specified string representation of a date and time to its
DateTime equivalent. The format of the string representation must
match a specified format exactly or an exception is thrown.
In your case; they are not ("26-11-2014" and "yyyy-MM-dd"). Use dd-MM-yyyy format instead.
DateTime time1 = DateTime.ParseExact(txtdate.Text,
"dd-MM-yyyy",
CultureInfo.InvariantCulture);
Then you can generate the format from your time1 like;
time1.ToString("yyyy-MM-dd"); // A string formatted as 2014-11-26
For your command part, you should always use parameterized queries. This kind of string concatenations are open for SQL Injection attacks.
You can use this
var dateAndTime=Convert.ToDateTime(Txttradedate.Text).ToString("ddmmyyyy");
I have a date string with dd/mm format like 06/03.Now i have to store this string into mysql table column with DATETIME format.
I am getting the problem as How can i add the current year generically because i don't want to hard code it.Subsequently how will i convert it into MySql DATETIME format for saving it.
Please help me .
You can use Parse method of DateTime:
DateTime dateTime = DateTime.Parse("06/03");
UPDATE
For your comment:
Also after parsing into DateTime i am getting date correct but time i
dont want to be 12:00:00 AM instead i want it to be 00:00:00.
12:00:00 AM corresponds to 00:00:00 only. You can verify that by getting Hour property which will return 0 and also TimeOfDay will too return 00:00:00.
Even if you try to parse exact date, it also creates the same format.
DateTime dateTime = DateTime.ParseExact("06/03 00:00:00", "dd/MM hh:mm:ss",
CultureInfo.InvariantCulture);
And you don't need conversion from DateTime object to SQL compliant DateTime object. You can pass the .Net object to SQL writer.
Consider the code:
C#
string s = "06/03";
System.DateTime dateNow = Convert.ToDateTime(s);
will give the output as you required
in VB.Net :
Dim s As String = "06/03"
Dim dateNow As Date = CDate(s)
MsgBox(dateNow)
You could do something like
var some_date = "06/03";
var year = DateTime.Now.Year;
var option = some_date+"/"+year;
Or use any of the string formats to bend it to your needs
More on date string format can be found on this MSDN page.
Edit:
If you want zeroes in the time, like your comment said, you can usit Rohit vats answer and do:
DateTime dateTime = DateTime.Parse("06/03");
var s1 = dateTime.ToString("MM/dd/yy 00:00:00");
// Output: 03/06/14 00:00:00
var s2 = dateTime.ToString("MM/dd/yyyy 00:00:00");
// Output: 03/06/2014 00:00:00
I've searched whole site and Google and couldn't find what I really need. I am trying to select records from SQL server DB between 2 dates (DB column is in date format not datetime). I take the dates from two TextBox (21.8.2014 format) and query is BirthDay >= dateTxt1 AND BirthDay<=dateTxt2
dateTxt1 and dateTxt2 should be a DateTime not a string.
Please do not offer me to use ToShortDateTimeString("dd.MM.yyyy"). I want something like this:
DateTime ddateTxt1 =Convert.toDateTime(TextBox1.Text, "dd.MM.yyyy");
Is that possible? output should be like 21.8.2014, not like 21.8.2014 00:00:00
How can I get the value from TextBox and convert it to DateTime and make a query.
I've tried belov code but didn't work:
CultureInfo provider = CultureInfo.InvariantCulture;
DateTime theDateTime = DateTime.ParseExact(TextBox1.Text, "d.MMMM.yyyy", provider);
Thank you
You can try this :
DateTime outdate = new DateTime();
DateTime date = DateTime.TryParse(TextBox1.Text,out outdate);
then
String EndDate = (DateTime)date.ToShortDateString();
hi i have datetime format in database like this
1/18/2014 4:14:52 PM (M/DD/YYYY h/mm/ss)
i convert it to ToLongDateString
string date = Convert.ToDateTime(myQuizOccurrence.occurred).ToLongDateString();
**result ->** **Sunday, January 12, 2014**
i want to convert back again that result date to become same format as database i wonder how to do it?
edited
so far i already try as #matt says using datetime instead string
DateTime dt2 = (DateTime) myDataGridView.CurrentRow.Cells[3].Value;
i already check it's have same format as datetime in database
but when i try to matching in query with this following code
Global.dbCon.Open();
string kalimatsql2 = "SELECT * FROM Quiz_Occurrences WHERE Occurred = " +dt2+ "
ORDER BY ID";
Global.reader = Global.riyeder(kalimatsql2);
if (Global.reader.HasRows) {
while (Global.reader.Read()) {
int idku = Convert.ToInt32(Global.reader.GetValue(0));
MessageBox.Show(idku.ToString());
}
}
Global.dbCon.Close();<br>
it's give error result
Syntax error (missing operator) in query expression 'Occurred = 1/12/2014 4:18:59 PM'
what i'm missing?
The vast majority of databases you will interact with should be accepting either a DateTime or a DateTimeOffset type directly. You would not use a string when retrieving data from the database, nor when sending data back to it. Therefore, format is irrelevant.
My guess is you are doing something similar to this:
DateTime dt = Convert.ToDateTime(mydatareader["MyDateTime"].ToString());
Instead you should be doing this:
DateTime dt = (DateTime) mydatareader["MyDateTime"];
When you save it back to the database, you should be using parameratized inputs that will take the DateTime directly. If you're trying to concatenate a string to build an SQL statement, you're doing it wrong.
i have datetime format in database like this
The best practice is to store date and time information with DateTime or DateTimeOffset type.
To convert back your string to DataTime you can use this:
string str = "Sunday, January 12, 2014";
var dateTime = DateTime.ParseExact(str, "D", CultureInfo.CurrentCulture);
Note that you loss the time part when you convert it to long date.