So I'm kind of new to VB and am just playing around with a little project, I currently need a loop that is constantly checking the systems clock to see if it's equal to a certain time.
While Not myTime.Hour = 24
If TimeOfDay = newTime Then
nfi.ShowBalloonTip(15)
[code].....
I would like to know please how to check whether a string exists or not in a html code. I'm executing a for loop. Each time it checks a different url, so I want to be able to check each time if for example "<img" exists .
P.S: What's the difference between using
webrowser1.navigate
AND
dim request webrequest
request = WebRequest.Create
etc...
I used .NET Framework 1.1 in C/S project before. Now I have updated the project to use .NET Framework 3.5 without modifying source code, but I have found that : the Remoted DateTime values can not be converted to the equivalent local time of a remote computer that is in a different time zone. In .NET Framework 1.1, the DateTime values can be converted automatically.
[Code]...
I have 2 DateTime values in a VB.NET application.
Dim startDate as DateTime
Dim endDate as DateTime
Now i want to make a loop for each day between startDate and endDate like:For Each day As Integer In
I am constructing a program, i am new to Visual Basic, but i have past programming experience. I was wondering if anyone knew how to form a loop that could...lets say calculate the answer when two numbers are added together,and it would repeat this thousands of times, etc. And if there is a way, would it be possible to calculate the time taken to complete this loop.
View 5 RepliesIn vb.net, is there a way to set a datetime variable to "not set". And why is it allowed to set a date to Nothing and NOT allowed to check if it is Nothing, like this:
Dim d As DateTime = Nothing
Dim boolNotSet As Boolean = d Is Nothing
This throws an error with this description:
'Is' operator does not accept operands of type 'Date'. Operands must be reference or nullable types.
i need to check for a specific DateTime value in my table from my code (VB.NET) and i don't know how to format the DateTime as a string. i've read that SQL Server will recognize my string if it's in either date, time, or date and time format. i mean:
'May 15, 2004'
'5/15/2004'
'20040515'
[code]......
<VB.NET 2005+SQL server 2005>
Error has to be raised for input text by user. User will input data on datagridview. Below are examples of use input.
1. "2009/01/23 08:00:10" --> How do I know that right datatime format or not
2. "2009/15/23 08:00:10" --> How do I check the month is wrong
I 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 get unexpected results when I use DateTime.ParseExact.
Here's my test code:
[code]...
It looks like it's because the day is systematically added by ParseExact even though I only specify the time in the format. My question is: How can I read just the time with DateTime.ParseExact?
how to check the server DateTime when the application launch. i want to make sure the user PC has the same DateTime as server when the user use the application. Reason being is some user may tend to change their DateTime backward and it causes a major confusion when it update in the server database. Below is my code....Both of the code giving problem and does not compare the date time to my pc datetime... how to check the the server datetime is same with the pc server time....
Public Sub GetServerDateTime()
Dim WMIScope As Management.ManagementScope
Dim WMIConnectionOptions As New Management.ConnectionOptions
[Code].....
I have two textboxes on the screen. They are used for startdate and enddate. If the user does not enter anything in the textboxes I pass nothing (VB.NET) to the webservice. When the webservice receive it on the other end it shows the value "#12:00:00 AM" which I think is the default for the datetime field. Anyway, now I do not want to pass this value to Stored procedure since it will not work. How can I check before sending values to sproc that the value is not the default datetime.
View 3 RepliesNeed 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 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 am exporting data from an sql table to an excel spreadsheet in Visual Studio 2008. There is a field that is date/time that I only need the time part of (hh:mm). I am using the Convert command to do this, but I am getting the error 'Undefined function Convert in your expression'. Is there another function I should be using? Or am I missing and Import command at the top?Here is the code (field TimeofFall is the one I am having trouble with):
Imports
System
Imports System.Data
Imports
[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 Repliesi have a table where in date column i have datetime datatype..i want to get only time in textbox...but i m getting both date and time by this below code. i m using vs 2005...sql 2005
[Code]...
I've got a calendar app where we're loading up a DataTable from one method, then merging the results with another method - both methods return the same type of data and the same columns. One of the columns in the results is "start_time", which has a date and time. What I want to do is sort the entire, merged, DataTable by the time in the "start_time" column, disregarding the date completely. I've gotten this far, but can't see how to get it done:
Public Function GetDates(ByVal dStart As DateTime, ByVal dEnd As DateTime, ByVal nPageId As Integer) As DataTable
Dim dt As DataTable
[Code]....
I think I need to create a new column and grab the time from the start_time column and then re-sort the table
I'm getting date-time from a source as 20110731183330. I want to convert it to '7/31/2011 06:33:30 PM'. Is there a one line code for the same in vb.net?
View 3 RepliesI want to display a "date/time submitted" value much the same way as Stack Overflow does
e.g.* 2 hours ago
* 3 days ago
* a month ago
how to do this in PHP
I defined a DateTime datacolumn in a datatable dt as [code]]....
View 5 RepliesI have the properties. I have the format property set to TIME. The text box on the form now shows the time. But when you click on the pull down, you get the date picker.
View 2 RepliesI've got a datatable with a DateTime field that I want to sort using a DataView. I only need the Time part of the column though, and not the date. I can't get it to show just the time and not the date as long as its a DateTime column. I know I could convert it to a string to get the time, but then it wont sort correctly.
View 1 RepliesI'm trying to create an auction site using asp.net. My auction's start date & time and end date & time are stored in my sql server 2008 r2 database as datetime types. I'm using vb.net. I'm trying to create a select statement in which I can query the date and time portion relative to the current date and time (so as to only display current ongoing auctions). I can successfully query the date portion using the Date.Now function, but the time is giving me a hassle. DateAndTime.Now doesn't work. I've even tried to separate the time and date in the database, but I still can't get an effective query. Here are two examples of code which I've tried:
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I am looping through a list of DateTime variables and have got the .ToUniversalTime variable. I want to find out from the list which is the closest one approaching Now.ToUniversalTime but am having difficulty trying to work it out I had it looping through like this but this isn't much good as I only want to return the one that is the closest approaching to the system time. If TodaysCard(i).eventDate.ToUniversalTime < Now.ToUniversalTime
View 3 RepliesIs there a way in VB.Net to determine if the timezone the current system has daylight savings time in effect? Of course I can get the offset from GMT using the "z"/"zz" formatting option, but that doesn't tell me if DST is in effect for the current timezone or if the current timezone is in standard time...or if DST/Standard time aren't even an issue in the timezone for the system.
View 4 RepliesI've a problem here, I'm trying to display the time in the text box but nothing is happening. I've already enabled postback but the textbox is still empty! Did I do the conversion wrongly? This is my code
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I am doing work on a new logging database that I have decided to use UTC datetime to store all datetime values since our company spans timezones and multiple sources and timezones are logging events.However the problem that I cannot get my head around is formatting the datetimes in my datagridview for my user application.Our applications use mostly LINQ to SQL to manipulate our data from generic SQL CRUD calls, so I am hoping I can mask/format the DGV to get the conversion or some LINQ function rather than having to write special SQL stored procedures to do it every time I need to display the data.. (I have found multiple sources that explain how to do that)
View 1 RepliesI have been dabbling in VB before and i played around wiht linq to sql back then but im wondering what i should go with here.I need to have a list of people.. They should all have their own id nr.
The people in the list are supposed to keep a record of values changing over time with a datetime stamp. (In my case its numbers from a test outcome of blood)You have to be able to add people and delete people. All records will be deleted too.A Chart will read information from the records and display changes over time in chart.I was thinking of doing it with linq to sql and i was kinda aiming at Creating datatables with id names from the script
Havent found a way of creating datatables from a script though..I was hoping for a solution like that.. And i was hoping id be able to search databasetable names.
I would like to capture a start and end time in format hh:mm.Instantly I thought a datetimepicker would be the most suitable component (see code below)[code]Now I'm unable to find a datetimepicker solution to allow settings of intervals like in the numericupdown control and unable to even set a mindate/maxdate in time format. Does anyone have a solution for these requests? I then thought about using a numericupdown control to capture hh:mm time but I could not find a way of doing this in ONE control rather than two whichwould involve code to ensure only valid hours/min values could be selected i.e. 0 - 23 and 00-59 and other date to string conversion/validation.For such a commonly recorded element I'm surprised to find little in the way of solutions other than third party controls.Does anyone have ideas for a way forward for a control to capture time as hh:mm with interval controls for hours and minutes?
View 4 Replies