I try to compare Datetime.Now with a Datetime variable I set, using the Datetime.CompareTo() method. I use a timer to compare these every second and display the result, but as the current time approaches the time I set, the result changes from 1 to -1, but never 0, which means these two are never equal. I'm suspecting the Datetime structure contains milliseconds?
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[Code]in my program, i've created a function wherein i will get the min timeentry for type 0 and it depends on the current date. so heres how it goes [Code] what should i put as the value of time entry? i tried format(var,"m") but no success. in the code i post above it also does not work. i get this error "The conversion of a varchar data type to a datetime data type resulted in an out-of-range value." how can i match the value in the database and the current date so that i can retrieve a value?
View 2 RepliesI want to filter my results with respect to date and time....I have date stored in a separate field which is of datetime data type...Another field stores Time value but as it is a datetime data type so it stores current system date along with the entered time. Now when I filter results using date then it runs well and shows the results between specific period like between dates from 12/10/2011 and 12/15/2011...But when I want to show results with respect to time it doesn't show any results...
I am using dataadapter and dataset for retrieving records from the sql server database... Please tell me the solution for comparing time value taken from the textbox with the datetime value stored in the database so that i get results between specific time like between 12:00 pm and 6:00 pm.
Actually I have datetime value stored in the database. What I am taking from the textbox is a time value. I want to extract those results from the database which are between the given time value....To be more concise, my application is a booking system for a sports club and provides an option to view alreaady made bookings.. Here i offer two options either to view all bookings for a specific game or to filter bookings. In filter bookings one option is to filter through date and time...Date option is running okay but problem lies in time part...I provide two times but unable to view bookings between them...
My code is:
Dim prmtimefrom As New SqlParameter("@booking_time", SqlDbType.DateTime)
prmtimefrom.Value = TextBox3.Text
Dim prmtimeto As New SqlParameter("@booking_tim", SqlDbType.DateTime)
prmtimeto.Value = TextBox4.Text
[code]....
I would like to compare the month of a date with datetime.now, when the datetime.now reaches a month beyond the given date to play a sound. I am novice to this.
View 2 RepliesIn my application i have to create an excel report of records. everyday at a specified time the report of records added from last 24 hrs has to be generated automatically. i am unable to compare the dates.
View 1 Replieshow to convert string to datetime and calculate date
View 3 RepliesI'm trying to match a certain DateTime value with the current system DateTime. I have a timer and a label on a form. Timer interval is set to 1000. When the form loads, the timer starts ticking. As soon as the current DateTime matches the value of the variable, it shows a message in the label. When I'm writing the following code, the values don't match even if the current system DateTime is equal to the variable. Label1 isn't showing 'Times Matched':[code]The default format of 'Now' is the same as I have stored in dtmVar variable. So there's no question of format mismatch. Does that mean 'Now' is not actually a DateTime property? Provided, my O.S. is Windows Vista Ultimate and all date/time settings are set to default.
View 1 RepliesI'm trying to match a certain DateTime value with the current system DateTime. I have a timer and a label on a form. Timer interval is set to 1000. When the form loads, the timer starts ticking. As soon as the current DateTime matches the value of the variable, it shows a message in the label.
When I'm writing the following code, the values don't match even if the current system DateTime is equal to the variable. Label1 isn't showing 'Times Matched':
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Dim dtmNow As DateTime
[Code]....
Why is it so? The default format of 'Now' is the same as I have stored in dtmVar variable. So there's no question of format mismatch. Does that mean 'Now' is not actually a DateTime property? Provided, my O.S. is Windows Vista Ultimate and all date/time settings are set to default.
datetime1 and datetime2now two fields are have data ( date )in table recordi want to update only datetime2 is an emptyi am using visual basic 2010 ( visual studio 2010
View 1 RepliesIm trying to retrieve some rows from sql server having datetime column that matches the given value of the textbox in a form. The tables datetime column name is "DepDateDepositDate" and the textbox.text was formatted as longdate eg("Tuesday, April 06, 2010") I have this code below but it seems its not retrieving the data that i wanted.
Dim daBnkBok = New SqlDataAdapter("Select * From DepositRef Where Convert(varchar,DepDateDepositDate, 112) = '" & Convert.ToDateTime(clsGlobals.BankBook.bbDepDate.Text).Date & "' ", bbcons)
Assume the following program is started at 1:59:01 AM on 3/13/2011 in the United States. The first time Timer1 ticks what will be the value of the TimeSpan (ts)?
Public Class Form1
Private Sub Timer1_Tick(sender As System.Object, _
e As System.EventArgs) Handles Timer1.Tick
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I'm trying to add the date and time of Today into a Sql-database-field that has the datetype datetime.
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the msgbox gives me the following result: 29/01/2011 18:49:21 my sqlException gives me the following error: 102 - Incorrect syntax near '18'. Is it better that i set the datatype to char in my sql database? It's maybe a bit easier? When I do that, can I calculate with these date?
how to change datetime variable in sql? I nee only time without date in textbox?
There's code:
Dim
connetionString As String
[code].....
Need to change datetime with time variable in this code, i tried bu it gets error
Public Sub SetWakeUpTime(ByVal time As DateTime)
bgWorker.RunWorkerAsync(time.ToFileTime())
End Sub
[Code].....
I have a datetime variable (00:00:00) and I like to increment with a timer every seconds...minutes.. hours...etc...
View 7 Repliesif I create a variable like
dim DT as new Datetime
automatically the date is set to 01/01/0001
is there a better way to check that no value has been assigned to the variable a part to compare the datatevalue?
I need to obtain time values from a SQL DB. However, I was able to set the datatype for the respective column in the SQL table only to "datetime" as there is no "time" option in the dropdown list in the Visual Web Developer. Namely, I want to bind a Listbox control only to the time data (i.e. not to "dd-mm-yyyy hh:mm:ss"). I tried to convert the datetime values to string and then extract the last 9 chars that refer to time.Unfortunately, my attempts to do that with SubString have failed:
weekDays.DataTextField=Convert.ToString("Start").SubString(length("Start")-10,9)
where:
weekDays - ListBox
[code].....
I have two datetime variables in VB.Net [code]I want to add both these variable in single DateTime variable , i didn't find any .Net function to do that.Is there any other way to do it?
View 2 RepliesHow can I "truncate" a DateTime variable so that only e.g. the current minute remains?
Like in:
Dim myDateTime As DateTime
myDateTime = Now
.... (what would have to come here)
If Now is e.g. 15:43:21 then leave only 15:43:00 in the variable?
[Code]...
I prefer to solve this problem at application rather than db level. NOTE: DueDate in database is of type datetime. I'm coding in C# interacting with Sql-Server. I hope my question is clear enough.
I am using OleDb, trying to do this:
Dim d as Date = DateSerial(Year(rptDate), Month(rptDate), 1 - 1)
Dim conn as OleDbConnection = new OleDbConnection(connStr)
Dim cm as OleDbCommand = new OleDbCommand()
[code]....
I know that d is the same date as the one in SQL server, specifically 3/31/2011 12:00:00 AM.
How do I convert ISO datetime to locat EST with vb.net?
I have input time as e.g. "20091027T1639Z" which is ISO GMT.
[code] "The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value.The statement has been terminated." [code]
View 6 RepliesI'm using VB .NET & SQL Express 2005.I was hoping someone could help me figure this out, I'm trying to search a table between two dates. The table has a datetime column and I am using VS .NET 2005 DateTimePicker control. I'm not getting any errors, but I'm not getting any results either..
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In my vb.net winform application, I am moving the file from one folder to another. I need to store the datetimevalue when the transfer has been done. Later I need to show this DateTime value in my Grid. Here is the code i have written, but not able to store the datetime value.
[Code]...
the last date was saved on database is: 6/13/2012 12:27:30 PM
In my DateTime Now is:6/13/2012 01:27:57 AM
but, when I execute this function, it always say:"Date has been manually modified, Please Set to Valid DateTime" But, DateTime Now is NOT lessthan the Date from my Database. What's wrong?
This is the code, please correct it,
[Code]...
I have a DateTime object I want to compare against an sql datetime field in a where clause. I'm currently using:
"where (convert( dateTime, '" & datetimeVariable.ToString & "',103) <= DatetimeField)"
But I believe datetimeVariable.ToString will return a different value depending on the culture where the system is running.
How would you handle this so it is culture independent?
EDIT : I won't be using paramatised sql in this code...
EDIT : following Parmesan's comment to one of the answers looks like the best method may be:
"where (convert( dateTime, '" & datetimeVariable.ToString( "s" ) & "',126) <= DatetimeField)"
i have a datatable in access with a column " Time " and i use it in a datagridview how can i format it to short time in dgv
View 8 RepliesMy SQL server is running from the west coast and I live in the east coast, I am running a VB.NET code and to check for items within the right time I have to use DateTime.Now.AddHours(-3).
Now thinking about it, when the daylight savings happen, it will only be DateTime.Now.AddHours(-2), how do I go about fixing that from now? Is there a way to fix that?
here i;m trying to select a date and time but i'm having problems can you see what i'm doing wrong Dim table = mydataset.Tables("Bookingen")
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