How can I set a DateTimePicker control to a specific date (yesterday's date) in C# .NET 2.0?
Just need to set the value property in a convenient place (such as InitializeComponent()):
dateTimePicker1.Value = DateTime.Today.AddDays(-1);
If you want to set a date, DateTimePicker.Value is a DateTime object.
DateTimePicker.Value = new DateTime(2012,05,28);
This is the constructor of DateTime:
new DateTime(int year,int month,int date);
My Visual is 2012
You can set the "value" property
dateTimePicker1.Value = DateTime.Today;
Can't figure out why, but in some circumstances if you have bound DataTimePicker and BindingSource contol is postioned to a new record, setting to Value property doesn't affect to bound field, so when you try to commit changes via EndEdit() method of BindingSource, you receive Null value doesn't allowed error.
I managed this problem setting direct DataRow field.
This oughta do it.
DateTimePicker1.Value = DateTime.Now.AddDays(-1).Date;
Use the Value property.
MyDateTimePicker.Value = DateTime.Today.AddDays(-1);
DateTime.Today holds today's date, from which you can subtract 1 day (add -1 days) to become yesterday.
DateTime.Now, on the other hand, contains time information as well. DateTime.Now.AddDays(-1) will return this time one day ago.
Also, we can assign the Value to the Control in Designer Class (i.e. FormName.Designer.cs).
DateTimePicker1.Value = DateTime.Now;
This way you always get Current Date...
dateTimePicker1.Value = DateTime.Today();
FYI: If you are setting the value, and not seeing anything - you might check to see if you have a 'CustomFormat' set - I just hit this and it was set to ' ' for the 1/1/1900 value (our 'not set' value) and set to MM/dd/yyyy if not.
Related
The max date accepted by Datetime data type in SQL Server and C# seems to be 31/12/9999 23:59:59. I have tried to assign a data value (01/01/9999 00:00:00) from database to a datetime picker. It failed saying
DateTimePicker does not support dates after 31/12/9998 00:00:00.
Parameter name: MaxDate
Now my question is when both the datatypes are compatible (datetime), why does these is restriction in Datetimepicker. This seems to be by design. Can any let me know why this restriction and how this feature in design is going to help?
Thank you
In normal operations the date time picker has to be able to display dates after the selected date. This means that if you selected the max date (31st Dec 9999) then theoretically it would have to display 1st Jan 10,000 - which it can't.
Therefore the picker itself restricts the initial value to be some arbitrary value before the max date so subsequent dates can be shown.
I don't see that this is a problem. When, in a real world application, is the user going to want to set a date 7000+ years in the future?
If your application has unset dates then perhaps you need to consider storing them as null in the database (i.e. make the column nullable) so that it's presented as a blank on the UI. This may actually make it easier for the user to spot dates that haven't been set.
It's as simple as that DateTimePicker checks against
DateTimePicker.MaximumDateTime
which is defined as december 31 9998
here's the relevant portion from the referencesource
public DateTime Value {
set {
bool valueChanged = !DateTime.Equals(this.Value, value);
// Check for value set here; if we've not set the value yet, it'll be Now, so the second
// part of the test will fail.
// So, if userHasSetValue isn't set, we don't care if the value is still the same - and we'll
// update anyway.
if (!userHasSetValue || valueChanged) {
if ((value < MinDate) || (value > MaxDate)) {
throw new ArgumentOutOfRangeException("Value", SR.GetString(SR.InvalidBoundArgument, "Value", FormatDateTime(value), "'MinDate'", "'MaxDate'"));
}
}
And MaxDate checks DateTimePicker.MaximumDateTime
http://referencesource.microsoft.com/#System.Windows.Forms/winforms/Managed/System/WinForms/DateTimePicker.cs,040fca665238ae30
I have this 21/10/1999 value manually inserted into the SQL database and when I retrieve it like this:
txtDOB.Text = readPatient["pDOB"].ToString();
It displays everything along with the time 12:00:00 AM. My data type for my date column is date, not datetime. So why is it displays the time as well?
((DateTime)readPatient["pDOB"]).ToString("d");
For a list of supported formats see: http://msdn.microsoft.com/es-es/library/zdtaw1bw(v=vs.110).aspx
You may try
txtDOB.Text = Convert.ToDateTime(readPatient["pDOB"]).ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
Edit: Thanks to comments saw that forgot to cast to datetime
It looks like you got your answer on how to properly format the value to a string without the time portion. But, no one has answered your other question:
So why is it displays the time as well?
This is because of mappings between SQL and .NET. In .NET a SQL "date" is stored in a DateTime object which does have time as well. To see all mappings between SQL and .NET see this: SQL Server Data Type Mappings
you can try this
txtDOB.Text=Convert.toDateTime(readPatient["pDOB"]).ToString("d/MM/yyyy");
You can use the string format parameter of the ToString to achieve any format you like,
like this:
TextBox1.Text =Convert.toDateTime(readPatient["pDOB"]).ToString("d/MM/yyyy");
Click on the datetimepicker then go to properties. There you can format your datetimepicker. Change format to custom (there few selection there) then set custom (provided in the properties menu) table with yy-MM-dd,an
DateTime dt = Convert.ToDateTime(sqdr["invdate"].ToString());
dt.Date; //To get the date only
I'm new to date timepickers. I was wondering if someone could explain them to me properly. I have a booking system that you must be able to book a date and specific time in the future and reserve that time frame in a sql database. Can I do it with date timepickers? It has a nice interface when its on my form but I cant see a way for the user to set the time? it always just gives me the default time. Any help? thanks
http://imgur.com/arZPxA5
The DateTimePicker-Control has a Format-Property, which will set the format of the date and time displayed in the control.
AS stated in this answer you can use following format to show Date and time:
dateTimePicker1.Format = DateTimePickerFormat.Custom;
dateTimePicker1.CustomFormat = "MM.dd.yyyy hh:mm:ss";
Here you can get a list of all format string and their descriptions:
List of CustomFormat-String
The result will look like this:
.NET also has a structure called DateTime to save your selected value.
You can save it with following code
DateTime yourSelectedDateTime = dateTimePicker1.Value;
textBox1.Text = yourSelectedDateTime.ToString();
Date Time pickers are pretty useful to use when you want people to be able to visually select a date/time. once the user selects a datetime, you can access it like this
int mymonth = this.datetimepicker1.Value.Month
int myday = this.datetimepicker1.Value.day
etc...
Furthermore, you can use events to trigger when stuff happens with them. So for instance, they select a date, you can use the ValueChanged event to make other fun stuff happen too.
Lots of troubles with DateTime fields today...
I have a DateTime field that I want to separate and display as a date in one DateTimePicker and a time in another DTP. This is what I tried:
dtp_date.Value = myRow.myDateTime.Date;
dtp_time.Value = myRow.myDateTime.TimeOfDay;
I'm getting an error that says it can't convert type 'System.TimeSpan' to 'System.DateTime'. I guess I just don't understand what I need to do differently. All it will do is display the time of day right now, not the one stored in my DateTime field.
Anyone know how to extract the time?
Try giving the DateTimePicker a valid date AND time. Hide the date on display and only show the time using DateTimePickerFormat.Time
DateTimePicker1.Value = new DateTime( DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 5, 30, 0 )
Pop in your time values from the myRow.myDateTime field
You could set the CustomFormat property of your DateTimePicker control:
dtp_date.CustomFormat = CultureInfo.CurrentCulture.DateTimeFormat.ShortTimePattern;
dtp_date.Value = myRow.myDateTime;
That should show the time portion of your date.
Just create a New DateTime object with the values you need:
dtp_time.Value = new DateTime(0,0,0,myRow.myDateTime.Hour,myRow.myDateTime.Minute, myRow.myDateTime.Second);
I want to set MaxPasswordAge Property of a DirectoryEntry object. I believe it is of type IADSLargeInteger. Now i want to set it to some value programatically. How do i convert a timespan to IADSLargeInteger. Eg. If i want to set it as 10 days how do i do it. Setting it Directly doesnt work.
DirectoryEntry child = new DirectoryEntry("LDAP://" + domain);
child.Properties["minPwdAge"].Value = ...
How do i set that value to n days? Any help is appreciated.
I don't believe you can actually write to this property. In any case, you want to get this in FileTime format which a DateTime object will give you as a property off of it.