DateTimePicker never updates!

datetimepicker c#
datetimepicker c# date and time

I have some DateTimePickers in a form that never update. I've tried Value and Text, Invalidate() and then Update() and also Refresh()...

Nothing seems to change their values from the current date! No matter what I set, the current dates are (relatively)today's!

Is this a .NET 3.5 bug or what? (No, I cannot use .NET 4 on this project.)


If you really want some code, then here it is: dateTimePicker1.Value = user.BirthDay;. Also, if I write MessageBox.Show(user.BirthDay.ToString()); I get a nice box telling the user's birthday (my birthday, on my machine). (So there is a value in the variable...)


Should I also mention that they are only for dates and not times?


Ok, I see I need to write more:

First of all, the method in which the control is updated is subscribed to the Form.Load event. Consequently, it is called/fired/invoked when the form and the controls are visible and "running".

Secondly, look at this pieces of code and their result:

MessageBox.Show(user.BirthDay.ToString()); // Shows 12.12.1995 (in my regional format)
dateTimePicker1.Value = user.BirthDay; // assigned to 12.12.1995
MessageBox.Show(dateTimePicker1.Value.ToString()); // Shows today's date!

That's not nice... The output is today's date. (By today I mean the day in which the code was ran.)

dateTimePicker1.MinDate = new DateTime(1900,1,1); // January 1st, 1900
MessageBox.Show(dateTimePicker1.MinDate.ToString()); // January 1st, 1753 ...

Bad control! 1900 doesn't equal to 1753!

dateTimePicker1.MaxDate = DateTime.Today;
// In reality, I need it to today's date
MessageBox.Show(dateTimePicker1.MinDate.ToString()); // December 31st, 9998

Time warp? O_O

Anyway, the whole code looks like this:

public void Form_Load(object sender, EventArgs e)
{
    this.user = User.Load(path);
    // this.user is a field.
    // path is a static field which holds the absolute path of the file in which is serialized that data of the user.

    MessageBox.Show(user.BirthDay.ToString()); // Shows 12.12.1995 (in my regional format)
    dateTimePicker1.Value = user.BirthDay; // assigned to 12.12.1995
    MessageBox.Show(dateTimePicker1.Value.ToString()); // Shows today's date!

    dateTimePicker1.MinDate = new DateTime(1900,1,1); // January 1st, 1900
    MessageBox.Show(dateTimePicker1.MinDate.ToString()); // January 1st, 1753 ...

    dateTimePicker1.MaxDate = DateTime.Today;
    MessageBox.Show(dateTimePicker1.MinDate.ToString()); // December 31st, 9998
}

So, any solution? xC

One small hint with this trouble: my problem was that I had the DateTimePicker set to checked=false and (by mistake) ShowCheckbox=false; With this setup I could set to DTPicker whatever value I wanted, but it won't udate itself.

DateTimePicker never updates!, DateTimePicker never updates! Question. I have some DateTimePicker s in a form that never update. I've tried Value and Text , Invalidate() and then Update()� DateTimePicker never updates! Ask Question Asked 9 years, 1 month ago. Active 8 months ago. Viewed 12k times 13. 2. I have some DateTimePickers in a form

The standard diagnostic for a form not updating its visual appearance, but you seeing the property update with the debugger just fine is using the wrong form instance. Like this for example:

var frm = new Form1();  // Wrong!!
frm.UpdateBirthDay(user.BirthDay);

Diagnose this by altering your code like this:

dateTimePicker1.Value = user.BirthDay;
this.Show();   // <=== add this

DateTimePicker value update not reflected in picker � Issue #1148 , DateTimePicker value update not reflected in picker #1148 so that the check is against the current 'open' state of the picker, and not the updated one from the props? v3 is no longer supported, we are focusing on v4 now. A DateTimePicker control allows users to select a date and time in Windows Forms applications. In this tutorial, we will see how to create a DateTimePicker control at design-time as well as at run-time, set its properties and call its methods.

My work around to update a stuborn DateTimePicker to display its current value and also update its related DataBindings is to toggle its .Enabled property.

myDateTimePicker.Enabled = !myDateTimePicker.Enabled;
myDateTimePicker.Enabled = !myDateTimePicker.Enabled;

Eonasdan/bootstrap-datetimepicker, I had to upgrade this package because of a new version of jQuery in Ember (3.x). The problem is: while changing a date, the time is always set to� datetimepicker is a jQuery plugin that popups a simple and clean date & time picker interface when an input field on focus.. Features: Simple and easy-to-use. Numerous of options to custom the time & date picker.

DatePicker, Gets the maximal date supported by this DatePicker in milliseconds since January 1, 1970 This function will never be called with a null state. Yes, you do. Imagine the case in which I update a start and end time dynamically through javascript: now it would be possible to explicitly set those values also for the datetimepicker, but an general update which reloads the inputs would be nicer.

Coaches toolkit: Date Time Picker stock control, When you add a Date Time Picker stock control to a coach or coach view, it has default values and looks Contains the initial date and time to display and stores updates to this value. Never shows the input text field and hides the calendar. Remarks. The Microsoft.Office.Tools.Excel.Controls.DateTimePicker is different from a System.Windows.Forms.DateTimePicker.The Microsoft.Office.Tools.Excel.Controls.DateTimePicker has additional members that enable it to be added to an Excel worksheet and that give it additional methods and properties.

DateTimePicker not updating dataset - C# / C Sharp, from when I change the date in the DateTimePicker and hence never gets updated to the database. When I use a datagrid everything is fine. The following code example sets the CustomFormat property so that the DateTimePicker will display the date as "June 01, 2001 - Friday". This code assumes that an instance of a DateTimePicker control has been created on a Form. public: void SetMyCustomFormat() { // Set the Format type and the CustomFormat string.

Comments
  • you are first one reporting this bug
  • Have you set a MinDate for the datetimepicker? Are you sure noone else is overwriting your value? Because I think it is pretty safe to say that there is not a bug in the framework ;-)
  • Have you tried setting the Value to DateTime.Parse(user.BirthDay.ToString())?
  • Would you insert your BithDay property code?
  • It does not work, else I wouldn't have posted this question, right?
  • This was the problem, it happens because when you right click 'Reset' the DateTimePicker value, it changes 'Checked' to False !
  • This did the job for me too, however, I had two TabPage controls with exactly the same kind of nesting for the contained controls etc., and for one of them I never had any problems. On the other TabPage, the (DateTimePicker) control never updated on the UI, but setting Checked to True for that DateTimePicker solved this (again, on the other it worked with both settings).
  • One more thing I just noticed - the comment for the Checked property of the DateTimePicker says "When ShowSelectBox is true, determines if the check box is checked, indicating that the user has selected a value.". The thing is - there is no ShowSelectBox property on my DateTimePicker control. Looking at the most recent version on MSDN (msdn.microsoft.com/en-us/library/…), the description has been updated, so might have to update our help files.
  • Same problem in a vb.net project I was just trying to fix. Whodathunkit? Thanks for posting the fix!
  • This control even purges the successfully assigned value when setting DateTimePicker.Checked to false afterwards (by code in the forms Load event)! So, there is no way to assign an initial value that is not enabled (checked) by default.... -.-
  • Interesting answer but I am afraid this is not the case. The control is updated on the Form.Load event, which fires when the form and the controls are already visible. Also setting the MinDate or MaxDate doesn't seem to work!
  • The form is not yet visible when the Load event fires. If it is then there's something really wrong. Set a breakpoint and look at the call stack. Make sure you don't see the constructor.
  • Don't use MessageBox to debug this. It pumps a message loop, allowing other event handlers is your form to run. Use Console.WriteLine, look in the Output window.
  • You've exhausted our crystal balls. Post a minimal version of your project, cut down to the essentials but still exhibiting this problem, to a file sharing service or paste bin. So we can repro this very mysterious problem on our own machines.
  • Ok, while putting the form in another project I have noticed that the problem is no more. (But it's still up in the original project!)