How can I create a function from this example:
Private Function CheckForNull(fieldvalue as string) as Boolean
That checks that all my fields are not empty? For example, say I have three fields txtFirstName, txtLastName, and txtAddress. How would I write the function above that would check that these fields were not left empty?
I have a HTTP class that gets content from URL's, POST's content to URL's etc and then returns the raw HTML content.In the function inside of the class it detects if there is a HTTP error and if so I would like to return false but will this work if I have declared the function to return a String?
Code Sample of what I am trying to do (Note the Return Content & Return False if a HTTP error code is detected)Public Function Get_URL(ByVal URL As String) As String
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im parsing an xml file using this code Private Function overview2(ByRef filePath As String)Dim reader As XmlTextReader = New XmlTextReader(filePath + "\movieData.xml")
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it works 80% of the time. What i mean is , i go through each node and when i find the overview node i read the data and send it to a text box. Im doing this for movies on disk. sometimes on certain movies it doesnt find the overview node even though it is there .
explain me the difference between them? I'm new to visual basic, and I need to know the very basic things in Visual Basic allowing me to become a professional User
View 8 RepliesI am completely lost on procedures. Whats the difference bewteen Private sub and private function?
View 1 RepliesI'm making a class and I have a function in this class the is looking to see if a user account in enabled.
Public Function IsEnable(byval user as string) as boolean
'if user is enables
return true
else
return fulse
end function
What is it just does not find the user, how would I return an error that the person using the DLL could detect and catch?
I am using following code to run a private function.I have two values in my combo box, One and Two and two private functions with the same names, Private Sub One() and Private Sub Two()I want my application to call the function whatever value user choses in the combo box.If One is chosen in the combo box, Private function one should be called.Code is below, that does not work
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim vrValue = ComboBox1.Items(1)
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This is just an efficiency question really.. I'm interested to know if there is a more efficient or logical way that people use to handle this sort of scenario.
In my asp.net application I am running a script to generate a new project my code at the top level looks like this:
Dim ok As Boolean = True
ok = createFolderStructure()
If ok Then ok = createMDB()
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I create a boolean and each function returns a boolean result, the next function in this chain will only run if the previous one was successful. I do this because an asp.net application will continue to run through the page life cycle unless there is an unhandled exception and I don't want my whole application to be screwed up if something in the chain goes wrong (there is a lot of copying and deleting of files etc.. in this example).
Basically i have a question how going to added the new private function as highlighted ?
View 14 Repliesi want to add calculations in 1 private function I have a textbox named lbldisplay.text when i enter a number.. the number is shown as a string so.. -private number1 as string when i press the button "+", "*", "-", or "/" the number1 must return into a double. So the number in the textbox is now a double.. so for example i press the + button, and i need to fill in a new number.. but this new number is also a string!
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I design a simple program that has manys sub program, I am trying to call Private sub, but i dont want may program to wait until it get back from that private sub, i want it to conitunie.
like calling Exp2 and the Exp1 countine the other command without waiting to get back from Exp2
Private sub Exp1 ()
...
...
...
Call Exp2
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I have a math program that I am working on. One of the exercises has a random word and 6 radiobuttons. The user has to select the radiobutton that displays the exact number of letters in the random word. What I am having trouble with is creating a Public Function to check if the answer selected is the correct one. The radio buttons are within a groupbox. The Public Function returns a boolean True or False.
View 4 RepliesSimple code! where am I going wrong. I get end of statement expected in line 4 after valid.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If valid('0') Is True Then msgbox("HI")
End If
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I am using visual basic and trying to create function. I am getting this error:
"Argument not specified for parameter '_IsDayRateCheckBox' of private function CalculateParikingCharges(_HoursDecimal As Decimal, _IsDayRateCheckBox As System.Windows.Forms.CheckBox) As Decimal'.
This is the code.
Private Function CalculateParkingCharges(ByVal _HoursDecimal As Decimal, ByVal _IsDayRateCheckBox As CheckBox) As Decimal
This is how I call the function.
Dim HoursDecimal As Decimal
Dim AmountOwedDecimal As Decimal
If Not Decimal.TryParse(HoursTextBox.Text, HoursDecimal) OrElse HoursDecimal < 0D Then
ErrorLabel.Visible = True
HoursTextBox.Focus()
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What is the difference between Private Sub /private Function / Private Class and to use them?
View 4 RepliesI am using this function in a module which is called from this event " Public Sub Painting(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs)" in the module[code]...
View 1 RepliesI'm trying to make an application that calls a function to create a timer, but I cant use WithEvents or Private inside of a function or sub, Is there any way to do this?
View 5 RepliesI am trying to call this private function, but am missing somthing, anybody point me in the right direction Private Function DL_WebPage(ByVal _URL As String) As String This is what I have tried, but with no success: call DL_webpage But this comes up with an error
View 3 Repliesi made this code
VB.NET
Dim iString As String
If My.Settings.IPBank.Count = 30 Then
MsgBox("You alredy have the maximum amount of IP Addresses stored, delete one to add another.", MsgBoxStyle.Information, "Program Error")
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I want it to check all of the items in the my.settings.ipbank which is a stringcollection. Before it adds and if it already exists in my.settings.ipbank then i want it not to add it. But it just adds when i run it. And then once its added it says: "Collection was modified; enumeration operation may not execute." But also before i run it. There is a warning saying: Function 'AddTo_IPBank' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used. Is this something to do with it? I think i have the Next in the wrong place .
I have as sub that is triggered from the file system watcher when the new file is created in spec. directory.I need to call some function to do something with that file. [code]
View 6 RepliesIf I try to put a string into a Boolean variable such as this:
Dim testValue As String = "True"
Dim bool1 As Boolean = testValue
With Option Strict On I get an error and the suggested fix is to change the second line to:
Dim bool1 As Boolean = CBool(testValue)
This is fine, But - what are the advantages / disadvantages of doing this instead:
Dim bool1 As Boolean = Boolean.Parse(testValue)
I have the following
Private Sub holidaysaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles holidaysaveButton.Click
For Each dr As DataGridViewRow In DataGridView1.Rows
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I've got a routine that checks a website my my external address. What I'd like to do is loop through the string just to get the first 15 numbers and full stops (periods). But that isn't my question, my problem is I've got this routine that isn't building because of a string conversion issue. I don't know how to correct it.
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I encountered due to a coding error a behaviour I can't explain.In one line I have an implcit conversion from a string to a boolean value:
Class myClass
Public Property myString() as Boolean
Return "123" '<= Implicit Conversion occurs here
End Property
End class
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Are there any differences in the behaviour between the .NET Versions?The code is compiled against .NET 2.0 with implicit conversion on.
I fill a DataGridView with the result of a database query. I have a boolean field named Gender. I want to show "Masc"if it value is True or "Fem" if it's False.
I can't assign a string value to a bool type cell. How can I do this?
PS: I've seen a C# example, but I can't understand how to do this in VB.
Dim today As System.DateTime
today = System.DateTime.Now
Dim strDate As String = today.ToString("d")
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I currently have the following GridView TemplateField:
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I am cleaning up some code and I have multiple classes that are 99% exactly the same. So my understanding is that my options are...
1. Create a class and all other classes inherit from it and modify it a bit
2. Create an abstract class and all classes inherit from it and modify a bit ** I took this route
3. Create an interface and all classes Implement that interface.
Here is my 'original' class below (the one that all of them look 99% identical). This class is used in an arraylist so I have a listing of all my images from a folder I have searched.
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From what I read it is a good convention to name a method that returns a boolean value with the prefix of "is" or "has". So in keeping with this convention I am trying to name a method in my program with this prefix but I am running Specifically I have a class called Day. It is a simple class with a few data members and one method that returns a boolean value of true or false. The name of the boolean variable is isSpecialDay. This class has a method called isSpecialDay which takes the date of the day, applies some criteria to the date and then sets the variable isSpecialDay to true or false. My problem is that the boolean variable is named isSpecialDay and so it the method. What should I do?
Public Class Day
Private TheDate as String
Private DayName as String
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The error occurs on the line If wba.Selected = "MARKETING CODE" Then.
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