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Display HH:mm:ss in DateTime x axis in Chart C#

I have series of data (temperature vs time) and I want to plot it using Chart object of .NET 4.0. The problem is that if I choose DateTime as the XValueType for the series it is displayed like dd.mm.yyyy but I want to display it as HH:mm:ss.
How can I do that?
Thanks for your help

Solution 1:
Try This:
DateTime myDateValue = DateTime.Now;
String XValueType = myDateValue.ToString("HH:mm:ss");
Solution 2:
if you are using windows chart control then
Try This:
chart1.ChartAreas["ChartArea1"].AxisX.LabelStyle.Format = "HH:mm:ss";
Solution 3: as you said in your below comments if you are showing only DateTime as a string it would be difficult while comparing.
Yes it would be difficult if you only show the Time part (HH:mm:ss) as string.
but if you display the Date and Time then you can again convert back the string to DateTime and perform conversion.
Try This:
DateTime date=DateTime.Now;
axisLabel=date.ToString("dd.MM.yyyy HH:mm:ss");
you can convert the datetime string back to DateTime as below:
DateTime date = DateTime.ParseExact(axisLabel,"dd.MM.yyyy
HH:mm:ss",CultureInfo.InvariantCulture);

Change datetime format

I have below code :-
1) String str = DateTime.Now.ToString("M/d/yyyy")
Output :
str gives "2/3/2014"
2) DateTime dt = Convert.ToDateTime(DateTime.Now.ToString("M/d/yyyy"));
Output :
dt.ToString() gives "2014/02/03 12:00:00 "
But I'm not able to understand why it is not giving "2014/2/3 12:00:00 " ,i.e, without leading zeroes in day and month?

DateTime values have no format, it is the DateTime.ToString() method that outputs your datetime value in a particular format.
If you don't specify any parameter in the ToString() then the output is formatted using the general date and time format specifier ('G'). (Usually is the one set up in you control panel international settings)
Console.WriteLine(dt.ToString("M/d/yyyy"));

The default format string for System.DateTime is "G" as in System.DateTime.ToString("G") where G is one of the presets. from source
Edit 1:
Globalization.CultureInfo customCulture = new Globalization.CultureInfo("en-US");
customCulture.DateTimeFormat.ShortDatePattern = "yyyy/M/d";
System.Threading.Thread.CurrentThread.CurrentCulture = customCulture;
System.Threading.Thread.CurrentThread.CurrentUICulture = customCulture;
DateTime dt = Convert.ToDateTime(DateTime.Now.ToString("M/d/yyyy"));
Console.WriteLine(dt.ToString())

When using ToString() without any format, it simply uses the default ToString() method.
Use the format you specified again to get the wanted result.

you can use the Format function for displaying the way you want
string.Format("{0:yyyy/M/d}",dateValue);
regards

Textbox textmode is DateTimeLocal

I have a textbox and i would love it to be formatted. fortunately for me, i can get this done by changing the textmode = DateTimeLocal. Exactly what I want. Additionally, I would like to load this textbox with default values rather than leaving it with dd/mm/yy __:__:__ . I can change the text if it is a regular textbox (single mode) or even a datetime textbox. but i cannot change it with DateTimeLocal mode. some help please. thank you.

You will have to format the DateTime to a valid Date and Time string that can be parsed, here is one that works:
txtDateTimeLocal.Text = DateTime.Now.ToLocalTime().ToString("yyyy-MM-ddTHH:mm");
For more details on what other attributes you can set, see: http://www.whatwg.org/specs/web-apps/current-work/multipage/states-of-the-type-attribute.html#local-date-and-time-state-(type=datetime-local)

Try setting the whole datetime format including seconds and milliseconds, worked for me.
txtStartTime.Text = DateTime.Today.ToString("yyyy-MM-ddTHH:mm:ss.ss");

If you want to set a TextBox's DateTime dynamically from a database then you can use this code:
DataTable dtTemp = (DataTable)ViewState["DataSet"]; // this are temporary table
TextBox txtFromDate = (TextBox)gridEditBloackHomework.Rows[e.NewEditIndex].FindControl("txtFromDate");
TextBox txtToDate = (TextBox)gridEditBloackHomework.Rows[e.NewEditIndex].FindControl("txtToDate");
string c = dtTemp.Rows[e.NewEditIndex]["FromDate"].ToString();
DateTime FromDate = Convert.ToDateTime(dtTemp.Rows[e.NewEditIndex]["FromDate"]);
DateTime ToDate = Convert.ToDateTime(dtTemp.Rows[e.NewEditIndex]["ToDate"]);
DateTime dtFromDate = FromDate.AddHours(-2);
DateTime dtToDate = ToDate.AddHours(-2);
txtFromDate.Text = dtFromDate.ToLocalTime().ToString("yyyy-MM-ddTHH:mm").ToString();
txtToDate.Text = dtToDate.ToLocalTime().ToString("yyyy-MM-ddTHH:mm");

DateTime picker C# format

I have a DateTime picker to add arrival time to a list, I have 2 questions about it:
How can I get it to show dates like 12-Jan-2012 Instead of 12/01/12?
How can I get it to show the time after the date but not the current time, as thats what is shows atm.
My current code is not very advanced its just:
theVisit.ArrivalTime = DateTimePicker1.Value

Something like this will display the date and time:
DateTimePicker1.Value.ToString("d-MMM-yyyy hh:mm:ss");
To override the default DateTimePicker settings, you can do this:
DateTimePicker1.Format = DateTimePickerFormat.Custom;
DateTimePicker1.CustomFormat = "d-MMM-yyyy hh:mm:ss";
You can show a different time by modifying the format string, e.g.:
DateTimePicker1.CustomFormat = "d-MMM-yyyy 12:00:00";
or even
DateTime otherTime = DateTime.Now;
DateTimePicker1.CustomFormat = "d-MMM-yyyy " + otherTime.ToString("hh:mm:ss");

For it to show in that format in the picker, set the properties below
dateTimePicker1.Format = DateTimePickerFormat.Custom;
dateTimePicker1.CustomFormat = "dd-MMM-yyyy hh:mm:ss";

You're looking for DateTime Format strings. There's a great article on them on MSDN.
There's two types:
Standard DateTime Formats
Custom DateTime Formats
You can use these to construct the datetime to look how you want it to.
For your example, you would use :
DateTimePicker1.Value.ToString("dd-MMM-yyyy hh:mm:ss")

First, to alter how your DateTimePicker displays DateTimes:
DateTimePicker1.CustomFormat = "d-MMM-yyyy hh:mm:ss";
DateTimePicker1.Format = System.Windows.Forms.DateTimePickerFormat.Custom;
Your code:
theVisit.ArrivalTime = DateTimePicker1.Value;
Would not change, because the DateTimePicker1.Value isn't any different, it's just displayed according to your format.
If you want the control to display a specific time (not the current time), you have to give the control that value:
DateTimePicker1.Value = new DateTime(2012, 12, 21, 23, 59, 59);
Otherwise it will display the current time as of the form creation.

You may check datetimepicker like this to check if it is empty.
if(DatTimePicker1.Text.Equals(" "))
{
MessageBox.Show("DateTimePicker is empty");
}

How to display a string for DataTime in the localized format as in Web.Config

I use Asp.net 4 and C#.
I have a Table in my DataBase with a DateTime Column formatted like this: 2011-08-11 11:32:50.43
I need display a string with the DateTime formatted in the right format accordingly to the Web.Config
in my case:
<globalization culture="auto:de" uiCulture="de"/>
So my question: How to set a string rappresenting DateTime accodingly to globalization culture?

I guess here is what you need :
DateTime.ToString Method (IFormatProvider)
For your case it must look like this :
CultureInfo culture = new CultureInfo("de-DE");
DateTime curretnDate = DateTime.Now;
Console.WriteLine("Date : {0}",
curretnDate.ToString(culture));

System.Globalization.DateTimeFormatInfo is what you are interested in. There is a hefty MSDN page for just this, actually. I also wrote a short example for you but I wasn't sure if you meant 08 as the month, or day, but you can easily switch that.
DateTimeFormatInfo formatInfo = new CultureInfo("de-DE", false).DateTimeFormat;
DateTime time = DateTime.Now;
Console.WriteLine(time.ToString("yyyy-MM-dd hh:mm:ss.ff", formatInfo));