Check For Valid Date Before Loading Data
Aug 1, 2009
How to deal with a "date bug" that I have encountered in my program. Here is a scenario.
1. My system has a locale of en_US and therefore displays the date as MM/DD/YYYY
2. My program tries to import from a csv file in which it carries out tests on a field to check for a valid date before loading the rest of the data.
3. If the date in the file is in the format DD/MM/YYYY the test fails and therefore the data is not loaded. This is the bug.
I would like code to test for the date string in the csv file that will recognize any date format (locale).
View 12 Replies
ADVERTISEMENT
Oct 10, 2011
I have a txt file with a few settings that get loaded into the Program. These are put into an array. As the array holds different types (int, string, dates etc) its set to object type.
What i am trying to fingure out is how to check the date is a valid format, by returning a false value so i can have a msgbox pupup and say the date in the file is invalid. I cant use isdate() on the string from the file as even if the date format is correct its a string not a date type so i have to convert it first (which is the point it throws an error).
View 3 Replies
Aug 15, 2010
with a system of regional date configuration as dd/MM/yy
isdate("13/08/10 10:00") ' returns true, but with a system of regional date configuration as MM/dd/yy
isdate("13/08/10 10:00") ' returns false
how to handle this situation, all i need is i want to check a string for convert able to valid date format & then convert the same.
View 3 Replies
Aug 18, 2010
So there's this accounting package at my client that spits out text-based reports with invalid dates, like February 31st or September 31st.The reports are formatted with spaces and mono-spaced fonts. The data that gets parsed out are fed into a more formal local SSRS report, and that's about all you need to know.
What I am interested in fixing is the situation where a date is invalid and can't be converted into a DateTime struct. The date format from the report is "MMM-dd-yy" (e.g. "Feb-30-10"). The date strings need to be fixed before being shown in the formal report. I've seen this done two ways in my time as a developer, and I want to come up with a cleverer way of doing it (if there isn't a built-in way I don't know about).The first bad method (I can't believe I'm even showing you!):
Dim month As Integer = <Parse out the month from the bad date string>
Dim day As Integer = <Parse out the day from the bad date string>
Dim year As Integer = <Parse out the year from the bad date string>
Dim validDate As DateTime
[code]....
View 1 Replies
Jun 2, 2011
an application i developed using vb 2008 express, to fill a web form with data from an access database, one after another when a button is clicked hasn't given me what i expected. the loop was suposed to stop after filling web form with the first data on clicking a button and continue to fill the webform with the next(2nd) data from the database on clicking the button again. Below is the code i wrote
Private
Sub STARTButton_Click(ByVal
sender As System.Object,
ByVal e
[Code]....
View 2 Replies
Mar 25, 2011
when i am trying this Date.Compare(Format(DateTimePicker1.Value.Date, "dd/MM/yyyy"), Convert.ToDateTime(dr(1))) < 0 it gives an error message as "Conversion from string "23/06/2011" to type 'Date' is not valid."where dr(1) is database field in text format as 29/3/2011 (dd/mm/yyyy) .
View 3 Replies
Jul 13, 2009
I have a window application develpoed in vs 2008, framework 3.5, in which i have put a button.. Now where i click that button the other text boxes are filled up with the data from database thru web service.. what i want is while all text boxes are being filled i want to show an animated loading gif image till data loading is completed in all the text boxes.. i have tried to use image picture box but while data is loading gif image is displyes but in static mode.. cant see animation... i think this is because data loading and animation both are done thru one UI thread..
View 8 Replies
Oct 18, 2009
how can I create following thing with Visual basic?I would like my excel to check the date value in a cell and compare it to current date and if the value in the cell is older than 2 months compared to current date it would change the cell's colour.
View 1 Replies
Aug 15, 2009
I did a clean install and tried to get the project running again. The code ... AlteredDate = SelectedDay & "/" & SelectedMonth & "/" & SelectedYear would always work defaulting to DD/MM/YYYY before the clean install. The program now runs an error "Conversion from string "13/8/2009" to type Date is not valid.. How do I change the default back to DD MM YYYY or format it to that?
View 3 Replies
Jun 4, 2011
is it possible to check if the customer input his complete name is valid or not?
View 1 Replies
Dec 16, 2011
I have a DB table with the following columns
PolicyNumber
NextPremiumDate
PremiumNumber
Example For each PolicyNumber i have 5 NextPremiumDates.I want to display the 1st NextPremiumDate which is easy ...but i want to show the next NextPremiumDate only after the last NextPremiumDate has passed...How do i check if the last date has passed?I mean if i have 5 dates in the table given above...how do i check if the 1st date has passed then show 2nd date ...if 2nd has passed show 3rd and so on.
View 1 Replies
Nov 30, 2010
conversion of date
if i used -- Date.parse("28/01/2011")
it gives me error as "String was not recognized as a valid DateTime."
so then i modify above code as -- CDate("28/01/2011").it gives me error as "Cast from string "28/01/2011" to type 'Date' is not valid." I used convert.todatetime also date.parseexact but nothing is working..
View 1 Replies
Jul 22, 2010
I need to check if a character is a valid Key (type) in VB.NET (I need to turn "K" into Keys.K, for example). I am currently doing this to convert it:
Keys.Parse(GetType(Keys), key, False)
View 2 Replies
Jun 4, 2011
I have an VB.NET application. This Application is permanently resident in memory and minimized to the tray area because we use it very often. The problem comes in when we VPN into a client's site. These VPN connections trash all other network connections to and from our machines.Then every time my VB.NET application refreshes its database, errors start occurring, because the machine has lost connectivity to the SQL server, however, these are not at the connection level, but only when the reader attempts to read.
I am checking for connection.open, but because of the SQL connection pooling, I just get a previous connection that was valid before the network was cut. Is there anyway to check if an actual SQL connection is valid, prior to re-issuing a connection from the pool?[code]...
View 2 Replies
Nov 7, 2010
After I send a post request to login to a site (using httpwebrequest), how do I check if the login is valid?
One way to do it is to read the whole html using
dim reader as new streamreader(response.getresponsestream) dim str as string = reader.readtoend and then check the html for any unique string (e.g. "log out"), to tell if the login is successful.
But reading the entire html is too long, so how do I shorten the process?
I tried
Dim str as string = response.getresponseheader("Set-Cookie")
But str is a blank string.
View 1 Replies
Apr 25, 2009
I am trying to create a program that visits a site, and checks urls if they return a 404 page.[code]...
View 9 Replies
Aug 2, 2010
I have a string in the format of 20100730 which i need to convert to UK format of 30/07/2010.
When i try to set 20100730 as a date it says it is not valid. Is there another way i can do this?
View 4 Replies
Feb 2, 2011
I am developing client application I store client details with e-mail address. but I give permission to users to entry valid e-mail address of every client, In that case I will check valid e-mail address for that how to check the given valid e-mail address
View 2 Replies
Mar 21, 2012
I'm trying to check if the input in the "enterKey" is 1) Numeric input value, 2) Integer input value, 3) Non-negative input value, and 4) Input value less than or equal to the Maximum Score which is 10. When I enter the number 10, my error message pops up.
Here is my
If e.KeyCode = Keys.Enter Then
If (IsNumeric(txtQuizScores.Text)) _
AndAlso (CInt(txtQuizScores.Text) >= 0) _
AndAlso (CInt(txtQuizScores.Text) <= 10) _
AndAlso (CInt(txtQuizScores.Text) Mod 1 <> 0) Then
[Code] .....
View 3 Replies
Nov 22, 2009
Well its not very important, but i have 500 emails (yahoo) and i want to make a program that checks if these emails are valid. Basically i want to send newsletters to these emails, but i want to know if the emails are really valid. How can i do that. I know there are some programs i can use, but i want to make my own program.
View 8 Replies
May 27, 2010
Looking for the best way to determine if a URI exists in VB.NET without downloading the actual content. System.IO.FileExists/My.Computer.FileSystem.FileExists can be used locally to determine if a file exists, is there an equivalent for the Web?
Currently I am using a HttpWebRequest to check URI existance using the ResponseStream. This populates the stream if the target does exist and throws an exception if it doesn't. The function is being expanded to also check for PDF files (typically 5MB +), images, etc and it will be a waste of time/bandwidth to actually populate the content into a stream.
In the case of "Success" (the target does exist) I do not wish to download the file or page, simply to end up with a Boolean which indicates the whether something exists at the end of this URI.
View 2 Replies
Mar 25, 2010
does somebody knows how to check for a valid IMEI?I have found a function to check on this page: url...But it returns false for valid IMEI's (f.e. 352972024585360).I can validate them online on this page:url...What is the correct way(in VB.Net) to check if a given IMEI is valid? [code]
View 1 Replies
Nov 10, 2008
I have a string coming into my app that is in the form of:
"Fri Sep 21 07:17:46 2008 GMT" or
"Fri Sep []3 07:17:46 2008 GMT" ([] is a space)
The tricky thing is the space for the date. I currently split the string and grab what I need to make a valid VB date.
Code:
'Receiving a timestamp in the format: Tue Jan 23 19:33:31 2001 GMT
'Split it and grab what we need to make a valid vb date
_element = timeStamp.Split
_dateAndTime = CDate(_element(1) & " " & _element(2) & " " & _element(4) & " " & _element(3))
Return _dateAndTime
I'm running into the problem when the date is a single digit because there is never a 0 on single digit dates. So, when I split the string I get a "" for _element(2) and that's bad. I know workarounds to adapt for this, however, my question is: How to implement the String.Format to manipulate this string as is and make it a valid VB date? How to make VB recognize this string as a valid VB date without a prepending 0 on single dates.
View 3 Replies
Dec 10, 2009
i've done a search on this error n found no match so i decided to create a new thread.this part of the program is suppose to get the date interval of dd(due date) and dr(date return) n charge the members accordingly.the program opens normally but when i go thru the records i have in my database, conversion from string "" to 'date' is not valid pops up.[code]
View 8 Replies
Apr 23, 2009
I create an empty boolean array check_state(), and then if a condition is met later in the script, I redim it and save a list of check box states as booleans into the array, and later check the array values, but I can't work out how to do this without causing an error if the array was not defined to begin with
View 1 Replies
Sep 23, 2011
I cant find any good example of vb.net checking if email is valid, as example "something@yahoo.com"
View 4 Replies
Jul 27, 2011
How can I know if I input a valid Birthday of a person in vb2005 windows base. If the user input the current date it must put a message that it is not a valid birthday.
View 8 Replies
Jun 18, 2009
See subject of positing for question.
1) I recall seeing a really cool option in VB.NET using LINQ to match using "LIKE%'
2) I know regular expressions will work and I suspect that will result in the shortest code and probably won't be too hard to read for such a simple test.
Here's what I did.
Private Shared Function FileNameIsOk(ByVal fileName As String) As Boolean
For Position As Integer = 0 To fileName.Length - 1
Dim Character As String = fileName.Substring(Position, 1).ToUpper
Dim AsciiCharacter As Integer = Asc(Character)
Select Case True
[Code] .....
View 5 Replies
May 12, 2011
Check Email if gmail and valid password length.
Screenshot:
Public Class Form1
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
[Code].....
This code might be useful for validating email address, and for simple email sender/bomber.
View 2 Replies
Apr 9, 2012
Is it possible to embed a code or something that can be used to verify an image? In my current project I need to load images and I want to have a code or something that my project can read from the image file before it loads it.Select Image -> Check if embedded code is valid -> Load pic on PictureBox
View 10 Replies
