IDE :: Datetimepicker When Dealing With Time Only?
Jan 6, 2010
I sure this has been asked more then once... New to vb.net and I have been experimenting with a datetimepicker and how it looks at and deals with time. What I am trying to do is to add up my time (not worried about the date at all). I have it figured out and can get it to work so long as I do not go over 24 hours... and that is where my issue comes into play.
How do I display my total time in hours once it has gotten over 24 hours ( I do not want days.. just hours) for instance, a 40 hour work week, not 1 day and 16 hours.
[Code]...
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May 20, 2012
I have created a vb.net application that uses a SQL Server database at a remote location over the internet.There are 10 vb.net clients that are working on the same time.The problem is in the delay time that happens when inserting a new row or retrieving rows from the database, the form appears to be freezing for a while when it deals with the database, I don't want to use a background worker to overcome the freeze problem.I want to eliminate that delay time and decrease it as much as possible?
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May 12, 2010
I have a form with the DateTimePicker control on it. When I select a date it gives a value like "date time" (Eg.: 5/12/2010 12:20:35 PM). But here the time returned is current time. What I need is for the date chosen from the picker automatically set the time to 00:00:00 instead of the time when the date was picked.
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May 12, 2010
i have a form with the DateTimePicker control on it. When I select a date it gives a value like "date time" (Eg.: 5/12/2010 12:20:35 PM). But here the time returned is current time. What I need is for the date chosen from the picker automatically set the time to 00:00:00 instead of the time when the date was picked.
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Feb 27, 2011
I have a Date Time Picker control and need to get it to display as H:mm in a text box as a declaration so that I can transfer to a database, I do not want the seconds. I have tried using :ToString("H:mm") but it just zero's off the seconds ie..."13:45:00".
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Jan 27, 2012
I'm having a little problem trying to figure out how to get only the time from a datetimepicker.I've set up a datetimepicker to only allow user selection of time by setting Format to Time and ShowUpDown to True.However, when I store the value of the datetimepicker to a variable, it returns a date as well.[code]However, this seems like a really inelegant solution and I can't figure out how to get an AM/PM behind that.I feel like I'm missing some really simple solution that I'm just not seeing! There HAS to be a way to get just the time!
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Apr 8, 2011
I'm new to VB and I'm so confused when using DateTimePicker. To be more specific, I have 2 inputs and two of them are Booking Start Time (BST) & Booking End Time (BET) (using DateTimePicker and set them as Time ). I should allow users to choose any time (including Minutes and Seconds)for BST (just need before than now) and BET. BET must be greater than BST at least ONE minute, but still also ensure it less than now (else it should appear a message box to tell specific problem). Then,system will calculate how long it is. [code]....
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Jun 21, 2010
I have 2 datetimepickers on my form, and I use them to pass parameters to my sql queries for reporting purposes. You would use them to pick a date range and display clock in times for employees. Anyway, I need an option so users can see information from a single day(24 hour timespan) My first Idea was to let the user change the date on the first datetimepicker then changing the time to 12:00 AM then the second datetimepicker to 11:59 PM. I want to be able to do this programmatically, but I couldnt figure out how to change the time.
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Aug 7, 2011
im trying to compare time value of to two datetimepickers, i tried to use dt_Start.Value.TimeOfDay > dt_End.Value.TimeOfDay but it doesn't work. btw, i trying to make a scheduler. here are some of my codes:
Dim strUpdate As String
If dt_Start.Value.Date > dt_End.Value.Date Then
MsgBox("End date is earlier than Start Date. Please check.", vbExclamation, "Error!")
ElseIf dt_Start.Value.Date < Today.Date Then
[Code]...
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Oct 9, 2011
How do i set only date will be inserted into the database using Datetimepicker??
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Feb 11, 2011
I have a DateTimePicker. Its Custom Format "hh:mm tt". Now if someone changed the value in DateTimePicker e.g 12:33 AM, I need move the date to 12:35 AM.On event LostFocus I'm able to retrieve all the information:
DateTimePicker.Value().Hour
DateTimePicker.Value().Min
and manipulate the values, whether to increase or decrease.Now, how do I assinged back the modified values to DateTimePicker
DateTimePicker.Value() = ??????
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Jun 5, 2011
i wish to concatenate date and time from 2 different datetimepicker after concatenated I want it to be save in sql database format which is yyyy-MM-dd HH:mm:ss
I'm doing half way and my query is like below.
Dim insertCmd As New SqlCommand(Sqlstr, connection)
insertCmd.Parameters.Add("@School_Subject", Data.SqlDbType.NVarChar).Value = txtSchoolSubject.Text
[Code].....
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May 10, 2010
Can anyone help me with the control to enter time as in the system's format .
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Jun 23, 2010
I have a datetimepicker on a form. It is not bound to a table field. When I open the form, I click on the arrow on the right of this control, the calender picker appears, I click on a date, and then I have to hit enter for the picker to close and the date to transfer to the control.After that, I can click on the arrow, click on another date, and the picker closes immediately and the date value goes into the control. Why do I have to hit enter the first time? I would like to be able to transfer the selected date to the screen the first time with just 1 click and without hitting enter.
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Dec 27, 2011
I want to display ONLY the time from the datetimepicker control in a textbox. It needs to stay in time format to be used in a timespan for arithmetic reasons.
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Oct 9, 2011
how can i remove the time when i inserted into the database using datetimepicker??.
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May 12, 2012
I have a DateTimePicker to display time (for example) as 05:00:00 AM or something like 07:00:00 PM. When I save my form's data, I'd like to save the time as 05:00:00 or 07:00:00, dropping the AM/PM extensions.
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Apr 15, 2012
I have a datetimepicker but the custom format is set to HH:mm tt so that I can get eg 11:20 AM
this value I have stored in database with the help of Label4.Text = DateTimePicker3.Value.ToShortTimeString.
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Jun 12, 2011
I want to save datetimepicker value of date and time in two separate text files. Currently, when I select a date from datetimepicker and save it in a text file it saves both date and time as below:
5/11/2011 8:25:06 PM What I would like to happen is as below: Datefile.txt saves 5/11/2011 Timefile.txt saves 8:25:06 PM Alternative solution that can work for me would be, if the time (only the TIME) can be modified after saving as below: saved datetime into text file is 5/11/2011 8:25:06 PM
How can I modify the time only to say 12:00:00 PM. By doing so I would like to keep time as 12:00:00 but date can be changed by the user using the datetime picker.
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Jul 5, 2009
I recently found myself in a thread deling with convertions from decimal number to fractions... Being a bit too brusk and dismissing the idea at first.I have now implemented a structure based on code frm Javelia whithc can be seen in this thread.Solitare also proveided code that I eventually understood and was working.[URL]...it a step longer and developed a structure that can also implement calculating with fractions... My first try is also posted in the tread above...
The implimentation is far from perfect, as it does not deal with POW of fractions.. So if anybody has some ideas on hoe to do this with squer root and all pleas let me know and Ill update the code..
[Code]...
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Apr 19, 2012
So I am making a file crypter so that I can encrypt my VB.NET Application that I am making so that people can't decompile it. I had made this in C# and am transfering it to VB.NET, Everything worked fine in C# but once I had re-written the code in VB.NET i get this error inside of my RC4 Encryption method:
'Arithmetic operation resulted in an overflow.'
The error is occuring here:
Dim t As Int64 = (s(i) + s(j)) Mod 256
This is the same code above in c#:
int t = (s[i] + s[j]) % 256;
Is there anyway to make that calculation with it erroring? And why does it work in C# but not VB.NET?
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Jan 6, 2012
I have a function called Modify. It is delcared like so:Public Function Modify(Of SIMType As {New, DAOBase})(ByVal obj As DAOBase) As Boolean
You can see that this function is generic. It takes as a paramer a object that is a DAOBase or subclasses of DAOBase.Inside the modify function there is a call like so:
DAOToGP(obj)This is where the polymorphism comes into play. There are four or so subclasses I have created of DAOBase. I have written a DAOToGP() for each of these types. So in the Modify() function, when it calls the DAOToGP(obj), polymorphism should kick in and it should call the correct implementation of DAOToGP() depending on the type that I pass into Modify().
However, I get the following error:Error 20 Overload resolution failed because no accessible 'DAOToGP' can be called without a narrowing conversion:'Public Shared Function DAOToGP(distributor As Distributors) As Microsoft.Dynamics.GP.Vendor': Argument matching parameter 'distributor' narrows from 'SierraLib.DAOBase' to 'IMS.Distributors'.'Public Shared Function DAOToGP(product As Products) As Microsoft.Dynamics.GP.SalesItem': Argument matching parameter 'product' narrows from 'SierraLib.DAOBase' to 'IMS.Products'. C:Usersdvargo.SIERRAWOWIRESDocumentsVisual Studio 2010ProjectsSIMDev_2SIMIMSDVSIMLibGPGPSIMRunnerRunnersRunnerBase.vb 66 39 IMS
I am kind of at a loss here. I am not sure why it cant figure out which function to call.
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Aug 23, 2011
my code works fine in JavaScript but doesn't work correctly in Firefox or safari and wondering why. What I'm doing is I have a loop going through each element and depending on the variable inside a text box just want to alert something. Like i said earlier this code works fine in IE. Here is the code below:
Here is an example of text box:
<asp:TextBox ID="txtMac" runat="server" req="yes" errMessage="Mac"/>
for (a = 0; a < theForm.elements.length; a++) {
if (theForm.elements[a].type == "text" && theForm.elements[a].req == "yes") {
alert("Made it here")
}
}
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Jul 19, 2011
Problem dealing with apostrophe in filter?
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Sep 21, 2009
I've been messing around with prime numbers for a while now, but I now want to use massive numbers, say a few million digits in length. Is there a way of storing and performing mathematical functions with such large numbers? Is it even possible on my home computer? I read on another old thread, something about a big number library, but the links he gave are now dead.
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Jul 30, 2009
I have a website and say a user comes along and fills out the form with bogus data. Then after he fills it out, he enters another one and another one and another one of bogus data. He's basically just trying to clog up the data base.
How is the best way to combat this? Would it make sense to when they submit the data track the IP address?
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Jun 10, 2009
A partner of ours is making a call to a web service that includes a parameter called token. Token is the result of an MD5 hash of two numbers, and helps us authenticate that the user using our partners system. Our partner asks the user for two strings, concatenates them, runs them through MD5, and then calls our web service. The result of the MD5 is the token, and it is submitted to us as a string.
We store valid tokens in a DB - since we use the SQL Server to compute the tokens on our end, SQL seemed to be happiest storing the tokens as a varbinary, which is its native result for an MD5 computation.
We have two pieces of code that attempt to do the same thing - run a select query that pulls out a value based on the token submitted. One uses a dynamic query (which is a problem), but it works. The other one attempts to do the same thing in a parameterized (safer) fashion, it does not work - it is unable to locate the token.
Here's the two competing attempts. First, the parameterized version which fails:
byteArrayToken = System.Text.UnicodeEncoding.Unicode.GetBytes(stringToken)
scSelectThing.CommandText = "select thing from tokenstable where token=@token"
Dim param As SqlParameter = scSelectThing.Parameters.Add("@token",
[Code].....
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Feb 9, 2010
Some tables I am dealing with have null values and are throwing errors. So far ive tried a few solutions to deal with the nulls with no success.Here are the code samples from my efforts so far;
If (r("datemodified").Equals(DBNull.Value)) Then
datemodified = String.Empty
Else[code]....
i have ran the query and it is working ok (i.e all the cols exist)
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Jan 12, 2012
Dim myreader As SqlDataReader = cmd.ExecuteReader
'read information from the database and give the values to the arguments(column_1, and column_2)
While myreader.Read
column_1 = myreader.GetString(1)
column_2 = myreader.GetString(2)
.....
I get an error when the data returned from myreader.GetString(2) is NULL. How do I check for nulls before assigning column_2 a value?
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Aug 3, 2009
I'm trying to test a varbinary(max) field to see if it's null. I'm trying to figure out if it's a null or not in the select statement, hoping to avoid having to do this locally for every row of the returned dataset. This is the SQL I'm using,
[Code]....
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