.net - InvalidCastException Error With Clearing Value Of Date Picker?
Feb 20, 2012
I use code such as this to clear out the values in several text boxes: Private Sub RibbonButtonInsert_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RibbonButtonInsert.Click
[Code]...
Because the date picker control did not clear out like the other controls did, I tried:
DatePickerDateOfBirth.Value = ""
but it does not clear out. Instead, I get an "InvalidCastException". show me what coding I need to properly clear out the value in this data picker?
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Oct 30, 2009
In Rad Datetime picker,when selecting any date in February always set it to date in March.
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Jan 3, 2009
i am using date time picker and i am selecting 1 date from calender.after selection of that date i want to refresh date time picker i.e. it should display todays date.
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Dec 18, 2008
I have an Sql server 2005 table called Emploeefl with 2 fields, EmployeeCode and Date of Birth. The data type for the date of birth is Datetime. I have a Date time picker on a vb.net 2005 form called dtDateOfbirth. When I click on the save button I get the error message "Conversion from string 'yyyy/MM/dd' is not valid. Below is the code
Dim newQE_Date As Date
newQE_Date = Format(Me.dtDateOfBirth.ToString, "yyyy/MM/dd")
'newQE_Date = String.Format("2008/09/10", "yyyy/MM/dd")
[Code]....
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Apr 7, 2011
The problem that I'm having is that when I try to select a different date, the text doesn't go away. That may make no sence, but let me tell y'all what I've done.
1: Created a GroupBox
2: Put a DateTimePicker in the GroupBox
3: Put TextBoxs in the GroupBox
4: Changed the DateTimePicker to look like this:
A)Checked - False
B)Allow Drop - True
I thought that if I changed that, then the text in the text box would go to that specific date. It didn't do that, it just stays the same. What I'm trying to do is enter text in say 3/7/11 and when I choose date 6/12/12 it will display blank text boxes for me to enter something different.
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Jun 1, 2010
How do i code a date time picker in form 1 and show the date and time in a label in another, I have 2 forms and a module to transfer.
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Dec 22, 2011
I have a date entered in from at DateTimePicker (dtDate.Value) and am writing it to an access database. This insert code works without the date, but not with it.
"INSERT INTO Deads (Location, LotNo, Date, Head, Cause, BookCost, JournalEntry, Pasture) "
InsertRow(StrComp, InsertSQL)
[code].....
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Nov 10, 2009
I am having a bit of trouble with using the date/time picker in a project.It is a program for calculating travelodge hotel accomodation prices. The price for a weeknight is 40 but weekends increase to �50.The code which I wrote is this:
For i As DayOfWeek = dtpArrival.Value.DayOfWeek To dtpDeparture.Value.DayOfWeek
If dtpArrival.Value.DayOfWeek = 1 Or 2 Or 3 Or 4 Then
PriceDecimal = PriceDecimal + 0[code].....
It does not work obviously because I am using the date/time picker for arrival date only. I think I need to use some other value which i would presume is something like "If DayOfWeek = 1 or 2 or 3...." but this will not work.
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Nov 15, 2011
i have to validate date using date time picker such that u can't choose the date /month/year before you were born.
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Apr 14, 2011
I have create a Car Rental application, where, based on two DateTimePickers, the number of days and, by extension, the total cost of the Rental can be calculated. I managed to get my DTPs working without much problem, however, my Min/Max dates do not seem to function.
Also, I want to create a condition where if the user returns the car on the same day, they only pay 60 percent of the normal cost. I have a basic idea of how to do this, but, once again, I am not quite able to get it to work.
Here is my code:
Private Sub Calculate_cmd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Calculate_cmd.Click
'Declare Variables for DTP Calculations.
Dim DatePicked As DateTime = Picked_dtp.Value
Dim DateReturned As DateTime = Returned_dtp.Value
Dim intPicked As Integer
Dim intReturned As Integer
Dim intDays As Integer
Dim intRate As Integer
Dim intTotal As Integer
' Set the MinDate and MaxDate.
Picked_dtp.MinDate = DateTime.Today.AddYears(-1)
Picked_dtp.MaxDate = DateTime.Today
Returned_dtp.MinDate = DateTime.Today.AddYears(-1)
Returned_dtp.MaxDate = DateTime.Today
'Read Data off of DTPs.
intPicked = DatePicked.Day
intReturned = DateReturned.Day
DaysUsed_txt.Text = intDays
'Calculations.
intDays = intReturned - intPicked
intRate = Val(Rate_txt.Text)
DaysUsed_txt.Text = intDays
If intDays = 0 Then
Total_txt.Text = intRate * 0.6
End If
intTotal = intRate * intDays
Total_txt.Text = intTotal
End Sub
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Jan 19, 2010
i have a problem on getting the values of it because of the same values such as the same parameter like @cdate_time_log, because i wanted to filter date through the use of date picker
Public Function _spselect_borrowerlog_fromto(ByVal cdate_time_log As String, ByVal cdate_time_log1 As String) As Boolean
Dim cmd As SqlCommand
Dim da As SqlDataAdapter
[Code]...
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Mar 15, 2012
we r trying to insert date from datetime picker into mssqlserver 2005 but it also enter defult time(00:00) with it in database. using we want only date... & xyzdtp.value.date &
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Mar 10, 2010
I'm using vb.net, in which i have a date time picker. I need to get a message when i change to date.I had done it with TextChanged event,But when i click the selection button of datetime picker the message is asking two times.How can i over come this.The code that i write in text changed events is as follows:
[Code]...
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Mar 11, 2010
How can I set this to ar lets say 3 months prior to today or say 3 weeks prior to today?
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Aug 27, 2010
I am using date and time picker to get current date but when i get date from date and time picker first time it gives me current date and time i save the record and when i try to get date and time second time it does not work
TextBox12.Text = DateTimePicker1.Value
DateTimePicker1.Refresh()
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Apr 3, 2010
How can I get the day from a datetime picker, in order to compare dates?
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Sep 22, 2010
How can i get only date from date and time picker.
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Feb 3, 2010
how can i add Date and Time picker in webpage using VB.NET
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Feb 27, 2009
How can i assign value to a Date Time Picker object.
My scenario is this:
I have a dtp that handles timeIn and timeOut. I want that if my Restday check box is checked, my Timein and Timeout will be set to 0000.
Here's my
Private Sub chkRestDay_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkRestDay.CheckedChanged
If chkRestDay.Checked Then
[Code]....
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Mar 10, 2012
i can't seem to get it the timers flow could anyone teach me how to use it for example the form would show up if the date and time in my computer matches with the time on my database im using vb.net2008 and mysql express for my db can't get it
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Feb 29, 2012
i have a problem regarding my project, its a library system to be exact here the flow of the problem in the library there is a borrowing time and a returning time of books every hours that the student failed to return the book it will cost 5 pesos(philippine money)and in a day it will cost 40 pesos.. 9 am to 5 pm is the counted hours of penalty, night is not included in the computation of penalty.. my borrowing form is in datagrid view.. is it good to do this in details view how to compute in date and time format?
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Dec 27, 2011
I'm having a problem with a date time picker. One of the requirements of the app is to have the date be blank until the user selects something.
[Code]...
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Oct 1, 2010
When I use a DateTimePicker my months come in Danish (my System is Dansih)
But I have one Customer there want the Months in english ?
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Jan 10, 2012
Does anyone know how I would go about embedding a DateTimePicker in my DataGridView?I've tried this piece of code but it looks like DateTimePicker isnt a valid GridView control - is it a lot of hassle trying to implement this?
Dim calendar As New DateTimePicker
totalKM = New DataGridViewTextBoxColumn()
totalKM.Name = "Total KM"
[code].....
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Apr 15, 2012
I have created a text box....a button and a date time picker control. I have showed the calander control on click of the button event....when a value is selected in the datetimepicker the value should be showed in the text box...I have done this....in the datetimepicker value change event
But then I want that the datetimepicker control to hide again...but this code I cant write in the value change event since if I write the hide code in datetimepicker value change event it will hide it every time...cant write in lost focus also since it will have to wait till the focus is lost. cant write the code in text box value change event since the value will be changed after every click in datetimepicker I want to write the code when the value in calander is doubleclicked...
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May 9, 2012
dtpPurDate.CustomFormat = "dd-MM-yyyy"
dtpPurDate.Text = DT.Rows(i)("PurDate")
In Access, PurDate is 1/1/1900 but in date time picker it's shown as 01-01-2000. At this time, short date format of system regional setting is like
If it's d/M/yyyy, it's shown as 01-01-1900.
How should I set the date time picker whatever regional setting is?
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Apr 25, 2012
when I try to use the code
Sub getReadings()
Dim intRead As Integer
Dim dateRead As Date
intRead = CInt(txtReading.Text)
dateRead = txtDateTime.Value comes from a date/time picker
txtTest.Text = dateRead
[Code]...
lstListView is just a standard lstbox. Have no idea why this is happening or how to fix it. I can post the rest of the code if needed.
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Feb 28, 2012
i am trying to use a date time picker in an input box to search for records in a database via the date. However i do not know how to get a date time picker into an input box.
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Jan 6, 2010
How do you set the back color for a date picker control in vb.net 2008? There is no back color property like on a textbox.
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Mar 16, 2010
I want to get the date in a date and time picker and convert it to check if a row in my database is either < or > than a than a DepDate field in my database.The SQLServer field type is Date... HOw can I do this?
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