I have few columns in a datagridview,out of which one is of type Button and another is of TextBox(which is hidden). When the user clicks on the button in the column , i want to execute the function whose name is written in the corresponding column.
View 6 RepliesI have Ln in my function that I write in excel but in vb it doesn't work
0.215*Ln(4.32/0.3)
it should return the value = 0.573
how can I write this function without using log function (I don't know logs functions)
I've got a basic logon form where if you enter the right password/username, it redirects you to the "MainMenu" Form How can I make a function called "checkLogon" that checks the username/password text to a variable in that function?
View 3 RepliesIs this a good way of getting out of a function?
If f1.AppendLine(strTextMsg, strText) = True Then
Return True
Exit Function
Else
Return False
Exit Function
End If
This is in code that I'm taking over and finishing and I'm just wondering if I should be skeptical of this logic. The programmer seemed to overly-use "Exit Function" (like right before an exception handler would be called as if he thought if he didn't have it he'd fall right through into the exception handler even when there was no exception).
Personally, I would've just coded: Return(f1.AppendLine(strTextMsg, strText))
I have this function which evaluates the contents of a textbox (or combobox or maskedtextbox) control and, in conjunction with a KeyPress event, will either allow or disallow the input. It is quite useful for dates or textboxes for which only numeric input is valid. It allows a set number of digits after a single decimal point, if specified in the function call. It also allows the backspace character if the textbox is full.
I would like it to allow me to input what would otherwise be valid text when the textbox is full but one or more characters are highlighted (and would therefore be replaced by the keypress character.
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I want to know how's the function KeyPress, on VB 2005, when it comes to the Help Buttons (F1, F2, F3)
View 3 Repliesusing the string function in VB 2005:1-When do we use string fucntion with paranthesis and without paranthesis ex:
Me._aldata = New ArrayList
Public Property getitem(ByVal intindex As Integer) As String
Get
[code]....
I'd like to know do i have to put paranthesis at all times?
I'm working on an updater for my applications. I'm using VB .NET 2005. So, when I push the button called "Download" it runs twice and does the following: Download the file (~20mb). When the file is downloaded then it does again the same overwriting the first file. I used the following to make the download possible:
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Function test(ByVal res As Integer) As Integer
res = 2
Return res
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I have a datagrid with a list of items. Each item has an url for a picture. For each item I have to download the picture from the url, and then show it in the grid. This takes quite a long time, and freezes my application while running.
Is it possible to do this in the background, while allowing the user to take other actions? For example, scrolling down the list to see the items that have been loaded. Or clicking on an item in the list, which calls another function. Maybe doing something on a different form. And doing this while the list continues to load in the background.
I am using the following
Public Function EncryptString128Bit(ByVal vstrTextToBeEncrypted As String, _ByVal vstrEncryptionKey As String) As String
Dim bytValue() As Byte = Encoding.ASCII.GetBytes(vstrTextToBeEncrypted.ToCharArray)
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I have to turn the GetFwt function on the code into a sub procedure. Below is the original
' Project name: Harvey Industries Project
' Project purpose: The project calculates an employee's weekly net pay.
' Created/revised: <your name> on <current date>
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I'm trying to create a VB .NET Sub (or function) to access to FTP server (FTPS, login, password). The purpose is to delete a specified file on this server. I have create a function which work with FTP (see below) but I need the same with FTPS. [Code]
View 3 RepliesI can't seem to get one of my functions to work based on a timer. Every tick of the timer, I'm trying to call a function which will start periodically taking screen shots until the 'Finish' button is pressed. However, I've run into numerous errors and wondered if anyone could give me any insight or suggestions. Here is what I have so far.
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One of the errors included "Public Sub RunAC() does not have the same signature as delegate". This might be really obvious, I'm a recent Computer Programmer / Analyst graduate with intermediate VB.net experience.
I have a function designed to detect if the program is being run on Win7. However, when it is run on a Win7 machine, it says it is NOT a Win7 machine. [Code]
View 3 RepliesI have trouble with my vb application.I create query in dataset like this :Select * from Trans where year(dateTrans)=2009 and month(dateTrans)=5But is not work and error message : year and month function not identified, what is the problem ? what a sql date function ?If i create databound from dataset and drag n drop date field in form with datetimepicker control, if i had update dataset, date field is empty.Whats wrong with datetimepicket databound.
View 5 RepliesI want my function to return a value of a structure. The function is supposed to change the values and then return the answers in one structured value. Here is my code... as you can see it does not work... it needs a LOT of things. I placed question marks were i am really lost.
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I have a 2 dimensional array of groupboxes that I use to populate a form setup so the first indice is a tab number and the second is the groupbox number.The user can dynamically add tabs to the tabcontrol but I need to add and populate groupboxes to the new tabpage and I can use existing groupbox data in the array for default values.I understand I have to code a deep clone of the source groupbox as it has textboxes in it so I want to add a cloneGBox function that returns a new, populated groupbox when I pass in the x,y indices for the source groupbox in my array.
dim gbx as groupbox = cloneGBox(x,y)
and code cloneGBX as
public function cloneGBox (byval x as integer, byval y as integer) as groupbox
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I am generating a page of HTML dynamically, which I then display in a WebBrowser control. Is it possible to have a button in my HTML which, when clicked, will call a sub or function in my VB?
View 4 RepliesI have probleam with my code, currently i am create scientific calculator which have function sin, cos & tan. The code i create it not working because every time i convert the function it will show 0 as answer. how to correct my code here.
Public Class Form1
Dim total1, total2 As Double
Dim [Operator] As String
Const conversionFactor As Double = Math.PI / 180
Dim result As Double
total2 = Val(answer.Text)
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I have two datetime pickers that when changed call a function that validates the two dates and changes them as needed. This currently causes a loop where the function changes the dates on the datetime pickers that triggers the function again...
So I would like to disable the datetime pickers valuechagned function while the function runs then re-enable it after it makes the required changes.
Private Sub dtpStartDate_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles dtpStartDate.ValueChanged
subValidateDate()
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I want to specify an List(Of String) as an Optional function argument. But i am unable to initialize it in the function declaration.
View 1 RepliesI'm trying to make a simple game tree.Previously I used nested loops:
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how can i get the illegal character in a string
for example
dim Strto_check as string = "1+2-2"
dim Listof_Illegalstrings = "~!@#$%^&*()_-+=-?/.,><|" ""
now i want a function to find out which is the invalid character available in the strto_check variable and then replace it with a standard place holder
what is the exact meaning of the function:
cmd.ExecuteNonQuery()
Though i used it a lot of times while inserting,updating or deleting the entries of the database but my basic concept about this statement is not clear.......
Im having problems calling a button click event.I have an ajax modalpopupextender inside of a gridview.The error im getting at btnOk_Click is Quote:Handles clause requires a WithEvents variable defined in the containing type or one of its base types.
View 1 RepliesHow I can check when someone uses the standard paste function via rightmouseclick? I want to check something before the text can be pasted.
View 3 RepliesI am using the following code to get distance between two propertys. The problem i am having is each Distance Calculation is being obliterated and I am only geting back the last Calculation instead of each calculation/distance
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Lets say I click a button on a form that calls a function in a data access class. This function inserts a record into a table in a database. The function returns an integer value for the record id of the newly inserted record. Now lets say the insert failed (syntax error, timeout, whatever). I can return a zero to the calling routine to indicate the failure, but not the error message. So in general, what's the most appropriate way to handle getting information back to a calling routine when the return parameter data type doesn't allow it?
View 3 RepliesI was working on this thread in regard to DataRelations on multiple tables. If I use CommandType = CommandType.Text, the code does as expected. However, I decided to take the SQL query and throw it into a stored proc. I then changed my code to use the stored procedure and I get the error as per the title of this thread.
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When I use the SQL Profiler, I see that NULL is being passed to the stored procedure. I have looked online and haven't been able to find an answer.