I'm reviewing some code in VB.net, and in a validation object they have written the following
If Not IsDate(Entity.SelectedDate) Then
ErrorList.Add(New CValidationError("MainReport", "Please select a weekend date"))
SelectedDate is of type Date. It seems to me it would be impossible to ever hit this condition. Is this true?
I am using MS Visual Studio 2205 Version 8.0.50727.42 and MS.Net Framework Version 2.0.50727 SP2 I created a form that requires the user to enter a date into the textbox.I then use the IsDate function to check if the entry is a valid date. IF Not IsDate(fieldname) then send message back to user on form, otherwise continue.If something like this is enterred - 06/090/10 - It passes the IsDate question and of course fails at the database level when inserting to a datetime field. Although there is a three character day, it still passes.
View 4 RepliesWas wondering why the IsDate function always returns false.
dim myYear as string
myYear = trim(txtYear.text)
If isYear(myYear) = false then
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I am writing a program to analyze error logs from an existing application, and I want to consider only lines that have a Date/time stamp at the beginning of each line.( in the format "03/13/08 08:03:58") I am extracting this as a string and want to evaluate it to make sure it is a valid date so I am using "IsDate(Mid$(TextArray(i), 1, 18))". The problem is that IsDate evaluates False even when the string I am passing should be valid (eg. 03/13/08 08:36:59).
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How can i do a isDate() control on a date like 16/01/2008 in vb.net?
View 2 Replieswith 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.
I have a CheckBoxList on my page that isn't behaving very well.The idea is that once the submit button on the form is clicked, the app should clear the database table of all rows pertaining to the specific user and then re-insert new ones based on the user's CheckBoxList selections.The problem is that regardless of whether or not any (or all) items in the CheckBoxList are selected, the app keeps getting Selected = False.[code]I'm aware of the potential for SQL Injection here. I'll be going over to using Parameters as soon as I have the loop working.
View 3 Repliesif one installer class in my project and in custom action doing some procedure to validate the serial key using user interface editor during setup creation. while installing the set up if the condition is not true the setup in rolling back it is installing.
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I have a GridView with a Checkbox on the first column: Code: The thing is that the Checkbox.Checked always returns False. How can I get the checked state of the Checkboxes in this scenario? Or what would be the best approach into updating the aforementioned column? P.S. Note that click on the checkboxes doesn't post back. Nothing happens on the page until the user clicks Save (and that is the intended behavior).
View 2 RepliesI have placed several PictureBox Images of different colored dots(which represent lights) on an image of a Christmas Tree. I can make the lights randomly flash using a randomGenerator and a Select case statement. However, the code is very long. There are 67 lights on this tree and the code is 71 pages long. There has to be an easier way to do this. So far I have tried the following with two images of lights just to see if it would work and it does not work:
Dim picLight(2) As
Boolean
For intX
[code]....
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.
View 3 RepliesI am developing c#.net solution where i have to calculate Start Date based on provided End date and Duration (back days) without weekends.
i.e. End Date: 05/5/2011
Back days: 5
Start Date = (05/5/2011) - 5 days (Excludes weekends)
Start Date = 29/04/2011
I'm trying to do some validation testing in VB.NET. If Entity.WeekEndDate.ToString = String.Empty Then ErrorList.Add(New cValidationError("id", "Incorrect Week End Date"))
Where WeekEndDate is of type Date. When I originally build the object, how can I insert a value into WeekEndDate that will generate an empty string(ie. "") when converted from a Date to a String?
I have the following query that should be bringing back a single date, however, it is bringing back the first date in the table, completely ignoring the Where clause.
'Get days pending
Dim AgePC As String
Dim sSQL As String = "SELECT [DateStamp] FROM [Activities] WHERE "
sSQL &= "[ClaimNo] = '" & Me.txtClaimNum.Text & "' AND [Activity] = 'PCAC' OR 'PCTE'"
Dim conn As New System.Data.OleDb.OleDbConnection(sConnectionString)
Dim com As New System.Data.OleDb.OleDbCommand(sSQL, conn)
Try
conn.Open()
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When I create a new data, key-ing in all details and for date as well. So when I click on the button Edit. Yes I can perform the edit function, I can edit everything. Then, once I click on Save, yes it Saved. But problem here in the date all goes back "1900-01-01".
View 5 RepliesFollowing a recomendation from an expert, I removed the Microsoft.VisualBasic Reference from my project in order to "clean" the code and use only .NET. Almost anything I have been able to fix except I cant find the equivalent of IsNumeric or IsDate functions.
View 13 RepliesI am using an image button and on click of it i want to go to visited page.Now i am using - Response.Redirect(Request.UrlReferrer.ToString()),It is going to previous page, but when i am in a page of some user details where the link is looks like - users.aspx?userid=25 and i visit some other page and click back(image button) i want to see the same userdetail page. How to track that.
View 2 RepliesI have a search page with a couple of pulldowns. Dependig on the values of them I show a grid matching the searched criteria, basically a table with links the user can navigate to. My problem comes when the user wants to navigate back. At the moment I have a "Back" button which simply redirects the user to the initial search page. I think it would be a good improvement to have the values of the pulldowns filled in with the values the user selected, this way when he presses the "Back" button he would not have to restart the whole search process again.
View 5 RepliesI'm not sure what I did, But I would like to get my toolbox back to normal where I can put it back on auto hide and such.
View 3 RepliesWe have a server application and a client application that communicates with each other using socket.
When the server application sends 2 messages about 16-31 ms apart, the 1st message is received by the client application with little delay (like 16-32 ms after it was sent). But the 2nd message is received by the client application a lot later (like 200 ms later) than when it was sent.
We already disabled Nagle algorithm (set NoDelay = True) in the socket in both the server and client application.
We are having problems with sending back to back emails on one of our web sites. The site is built with .net framework 2.0.We can send the first email without any problems on every try. But to send a second email you need to wait about 20-30 minutes.the problem.One thing we tried was changing the smtp email server. We tried a third party smtp server but the same problem persisted. So I think the problem is not with the smtp server but with our .net code.
Imports Microsoft.VisualBasic
Imports System.Net
Imports System.Net.Mail
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Title pretty much says it all. How do I format the date of a dateandtimepicker to insert it into the SQL date datatype?
View 20 RepliesI am creating an application that will be faced with multiple decisions to make and I want to know if it is possible to create around 20 if statements to excute or decide between before excuting?
The application will encounter multiple websites but each website will have the same elements but not neccessary in the same order so I was going to tell the app to loop through the IF statement and if the condition is met to run that sub routine where it starts over and loops through the IF statements until next condition is met.
Is this possible in VB.NET or is 20 or so IF statements to many to use at once?[code]...
I have a dBase file named PROBA, with two cells: "VNEV", "KNEV".I would like to see the records back-to-back in a Msgbox.
Imports System.Data
Imports System.Data.Odbc
Public Class FormCount1
Public Sub Recordszm() Handles MyBase.Load
'TODO: This line of code loads data into the 'DataSet1.PROBA' table. You can move, or remove it, as needed.
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i am using this function to get link of page which refered current page (in Back Button)
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how I can ensure that conversion of a date to a string and a string to a date will give me the same date format.
For example:
Code:
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim d As Date = Date.Now
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I'm actually only interested in the date part as the label text shows so f is more than I want.But also, the day and month are reversed.
i have 2 datetimepicker which are startdatedatetimepicker and enddatedatetimepicker.. the start date should not be more than end date..thus i need to check these two date.. here is my code...
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I have a date time as a string, eg. "2010-08-02", I'm trying to convert it to UTC with the following code snippet..DateTime.ParseExact("2010-08-02Z", "yyyy-MM-ddZ", CultureInfo.InvariantCulture)When I print to the console, I get the following: 8/1/2010 5:00:00 PM.Is there a reason why the date shows up as the date before the date I'm trying to parse? I could just add a day to this to advance to the original day.
View 3 RepliesI have this code and it evaluates to false instead of a string. All its doing is building a string.
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I wanted to create my own type that acts like the Boolean type, except I wanted to use Yes and No instead of True and False.I kind of got close but it wasnt exactly what i was going for here's what i have:
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so i have to use an integer when i dim it like:dim b as MyBool = 1 then when you look at it in the watch window b = {Yes} so i could settle for that, but with a boolean you can do this:dim b as Boolean without setting it to anything it defaults to False mine however, is Nothing. 2 things: 1. How can i get mine to default to No 2. How can i make it work like this: dim b as MyBool = Yes instead of having to use the integer this is not a requirement for anything I just wanted to know how to do it