VS 2008 Coding An If Statement From An Array To An Event?
May 1, 2010
I'm trying to make a show/hide button. I want the show hide button to be attached to an object on a form. Right now I just have separate show/hide buttons set the 'visible' property to true/false respectively. I want to code something that will consolidate the two properties. But I don't know how to code an if statement into an event, in this case the click event.
I'm thinking I'd have to do something like create an array (which I'd have to read a tutorial on first) that would hold two numbers. So, if the object on my forum's default visible property is true then if the button was clicked once it would be set to false (1) and clicked again it would be true (2). So, the array would only remember two values (1 and 2) and I'd have to create something else that would remember the previous value (say, 2) and than get the array to spit out the only other value (say, 1) it holds. Then finally strip the value the array spit out and have it go through some kind of if statement that would set the true/false value.
Without posting the exact code I'd need to pull it off, how would I go about doing this? Am I on the right track, or is there a simpler way? I'm new to programming.
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Oct 14, 2009
See
Public Class Form1
Dim sql As String
Dim conn As New OleDb.OleDbConnection
Dim da As New OleDb.OleDbDataAdapter
[CODE]...
The problem, The INSERT statement works fine in the form load but not in the button click event?
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Aug 20, 2011
I'm in the middle of making a battleship game, and I'm trying to get picture boxes .visible=True based on the coordinates (that have already been given a nice Try/Catch/Finally error handeling block) of the ships. Example: I have picture boxes in a grid formation that are all red, and my naming convention for them is picR00 for the coordinates (0,0), picR01 for the coordinates (0,1)... et al. Because I'm using a(10,10) for my boolean array, I want the stuff thats false (not marked), those coordinates' red picture box to become visible, and the true have the green ones become visible. Here is what i have so far:
Dim a(10, 10) As Boolean, b(10, 10) As Boolean, c As Integer, x As Integer, y As Integer, ox As Integer, oy As Integer
For c = 1 To 3
[Code].....
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Jul 31, 2010
I've read thru Iceplug's tutorial on control arrays and got it working. I tried to add a new event by basically copying his click event code and calling it a doubleclick event. I used the proper addhandler and assigned the correct name to my sub. I have the click event changing the background color to blue and the doubleclick event changing the background color to green. The background color does not change to green. Why?
Heres the tutorial with my new code encased in asterisks ...
Code:
Imports System
Imports System.Windows.Forms
Public Class form1
[CODE]...
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Oct 23, 2009
Im connecting a infrared transmitter by serial port, Rs232 to my pc. Anyone know the coding for the comport to detect the signal and auto trigger a sms event(by gsm modem) ??????
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Mar 29, 2011
In the example from my book, I'm coding a button click event, and adding the code..."me.width=me.width + 20"The author states that "me refers to the object to which the code belongs(in this case the form)".
But this isn't exactly accurate, is it? The "code belongs" to the button object -- not the form object, right? So, I'm guessing that what the author really should have said is that "me refers to what ever form you're working on". Would that be true?
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Oct 19, 2009
I have created Command Array like follows.
Public Class Form1
Dim NewButton(25) As Button
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
So.. I want to get each and every command button name when I press One of command button.
Ex:
If I press NewButton8 then I need msgbox with it's name, text (All of command button properties if possible). Button Name is very important
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Mar 27, 2010
How can I call the Click event of an array item of buttons? [code]I want to call the item 1.the Click event of an array item 1 of buttons?
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Dec 16, 2009
I need to declare a directory, create a file in the form_load event. I need to write the value from an array in the file when during Button_click event Is there any way to use the object declared in the form_load to be used in the Button_click event????
[Code]....
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Aug 12, 2011
I have one user that is having a problem with my application, the error report shows an event type of clr203r and an index out of range exception. From what I've read this seems to have "something" to do with arrays or lists. (What that something is, so far, is beyond me or anything I've researched). I do have one array in my program -- myarray(13) as byte and I do have the syntax right as far as noting 20 elements in it. in my other bits of code.
I'm reading those bytes in the serial port, deciphering them and performing some actions. (to be vague). But just with what I've said, can anyone point me to a possible problem? Is the index out of range exception ALWAYS concerned with just arrays or lists? Or could it be something else?
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Jan 13, 2009
I am novice so my questions may be very simple or very stupid, please advice me anyway.I just need an if statement with a key press, so all I want to type in code is - if I press a letter on the keyboard ("a" for example) I will run the event I need in that if. So how would you write this if statement.
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May 29, 2009
I started out with VB.NET but now mostly do C#. I never really got to grips with events in VB. I'm trying to translate an old VB.NET program (from 2002) into C#. I've dealt with everything apart from statements such as these:
Public Event UpgradeProgress(ByVal strProgressString As String, _
ByVal strCurrentFile As String, ByVal intProgressPercent As Integer, _
ByVal lngTimeRemaining As Long, ByRef blnCancel As Boolean)
[code]....
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Apr 29, 2009
I need help with a month calendar. I want to write an If statement in a button_click event. I need an If statement that says if one date is selected then a label becomes visible. I cannot figure it out.
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Aug 31, 2011
I have three tables set up in a MySQL database called "event", "status" and "user". (as shown below:
EVENT TABLE (below)
STATUS TABLE (below)
USER TABLE (below)
and when I get data from the event table I use the SQL query statement below to bind the persons first and last names together as one variable called "name" and then bind that name to the respective user_id; and so on. However when I make changes to the event table it doesn't show the changes I've made. I'm certain it has something to do with the way I'm retrieving the data.
SELECT CONCAT(u.lastname, ', ', u.firstname) AS Name
, s.message AS Message
, DATE_FORMAT(e.timestamp,'%b %d %Y - %r') AS DateTime[code].....
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May 31, 2012
I get this error:
[Code]....
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Oct 31, 2011
I have a button on a web page that I just need a little help with some extra code. I think I need a TRY, CATCH statement?, this is what I have so far: I have a simple web page that has a button which at the moment when pressed enables the user to add data to a DB table via a stored procedure.Once this button is pressed a pop up message box is displayed to let the user know the data has been passed. The user then needs to press the 'OK' button within this message box which then directs them to the home page of the site. This works fine.
The code for this is here:
Protected Sub btnAddRawData_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAddRawData.Click
'database conn, this is linked to the web config file .AppSettings
Using dbconnection As New SqlConnection(ConfigurationManager.AppSettings("dbconnection"))
[code]....
As I don't want the user to enter duplicate records in the database (This could be done by the user navigating back to the page where the btnAddRawData_Click is located and pressing it again.), I have created a UNIQUE INDEX named 'DupRecords' to stop the user from commiting this data more than once that day.When I run the web page now I get the following message in my browser:
Cannot insert duplicate key row in object 'dbo.GasRawData' with unique index 'DupRecords'.The statement has been terminated.The solution I think, is to add a TRY, CATCH statement into the btnAddRawData_Click code.
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Jun 23, 2009
I have the following problem:
Dim MyArray (2) , MyValue as integer
Dim R as New Random
For i = 0 to 9
MyArray (i) = r.next(20)
Next i
Suppose:
[Code]...
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Jun 22, 2009
- In my database, there's 2 table....Log, Application
- I am trying to construct a sentence for my log, something like..
(E.g.: Apply Annual Leave from Monday to Friday)
- Words in bold are to be retrieved from the Application table (database)
Here's my vb code (I am not sure whether I should be using array or not and I am not so sure how to use it too).
Private Sub btnCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCancel.Click
con.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0; data source= H:\Project\user.mdb"
con.Open()
sql = "SELECT * From Log"
[Code] .....
But when I view my Log..something like this appear
- How do I let the array know that the statement is an sql statement, not text??
- or Is there any other way to do it?
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May 7, 2009
Say we have a DataGridView on the main form. I can chose to establish its properties by code or by selecting them in the Properties panel. Is there a difference between these two techniques, a loading time penalty in any of the cases especially?
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Apr 22, 2009
I Have a project to do for the class and i start to do it but i am not able to do the last part which is ( if there is no win, it should say drew) i do not know how.lp me on that and if you can give me easier way ti am using visual basic 2008 express.here is the codeode
Public Class Form1
Dim player As Integer
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
[code]...
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Sep 26, 2009
Dim i As Integer
If Label1.Text = "" Then
i = BPORes_csvDataGridView.CurrentRow.Index
Label1.Text = BPORes_csvDataGridView.Item(0, i).Value
[CODE]...
I have this code in the click event for a button I want to be able to select a row in my datagridview then Hit the ok button and have it populate to text box1 if textbox1 is already filled then i want to go to textbox2 and so on, (total of 6) So far if extbox1 is empty "" and i click ok button it populates, when i click ok button again to textbox2 does not populate.
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Jun 13, 2012
I am making a program that automates the seperation of a csv file. We read the csv in through and then assign the "line" using a split command to an array. After that we go through each "cell" in the array and put an = in front because this causes leading zeros not to be lost. Here's the code.
arLine = line.Split(replace)
For Each cell As String In arLine
cell = cell.Replace(",", "")
cell = String.Format(cellFormat, cell)
Next
arLine is the array and replace is the delimiter, in this case a pipe not that it matters.'
When it goes through, the arLine is correct but the values in each cell are not changing, any thoughts? newer to VB.net and need direction
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Aug 1, 2011
I am needing a way that an if statement stored inside of an array can be executed.I am designing an application that will allow users to input if statements that will be used to determine if certain values are met. The input is saved to an array that I need to be executed later. Is this possible in Visual Basic?
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Aug 10, 2009
I have developed an application for Windows Mobile Devices using Visual Basic 2008. One feature of the application, allows users to view records that are stored online, on the device. The application sends encoded data to an API, which is simply part of a server. The process I am using to send the data to the API is extremely simple. When you press the "Send" button in the application, it pulls the information needed, encodes that information in base64, and then attaches that information to the end of a URL. For example, it would look exactly like this when it was ready to send.
[URL]
The data is then sent out by simply loading it into a webbrowser control. Once the data hits the API, the API Then sends a response back. And this is where my issue is coming into play. The API either sends a message back saying "Pass" or "Fail". If it Fails, It includes and Error Message. If it passes, it includes a "URL" which then has to be opened in a browser or in a webbrowser control.
I need to know: HOW DO I CAPTURE THE RESPONSE THAT THE API IS SENDING BACK. More Specifically, I need to know how to capture the URL that is being sent back from the API, so that I can open it in a webbrowser control.
Now, I feel like I need to be more specific as to what is going on. I am able to send the data to the API, and it is being sent exactly as it needs to be. It has been confirmed on the API side, that the response is being sent back to me. The only problem I am having, is trying to figure out what to do with the response, more specifically, how to view the response period. I'm extremely new to the entire API Deal. Without being able to view the URL That is being sent back, the feature doesn't work of course.
MY CODE I HAVE SO FAR:
Public Function VARRecEncode() As Object
VARRecEncode = p1 & AccessPin
TextBox2.Text = VARRecEncode
[code]....
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Jul 13, 2011
I can't fix following code:
Private Sub Dic_List(ByRef sender As Array)
Dim L_sender As Integer
L_sender = sender.Length / 5 - 1
ReDim Preserve sender(4, L_sender + 200)
End Sub
Error 1 'Redim' statement requires an array.
But sender is an array.
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Jan 10, 2012
Is there a way to pass data from a Select Case statement to an array? i.e. I have a gradebook program I'm working on which specifies that I'm to create a form with a menu that will open another form which has textboxes for 5 student names and 5 grades for each. I need to use an array that holds 5 student names (done), an array of 5 strings to hold each students' letter grade (?) and 5 arrays of 5 numbers to hold each student's set of test scores (done). What I can't figure out is how to get th
Public Class StudentData
Private Sub btnOk_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOk.Click
[code]......
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Mar 26, 2009
I'm using VB.Net 2005. I have created a Structure Array that contains 7 fields. I am trying to figure out how to sort this thing and have no idea. I've been reading up on the Array.Sort function and I'm bombarded with Overloads. I just don't know how to set up the statement. Below is my
[Code]...
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Sep 1, 2011
Am new to programming and i would like your help to this question. [b][color="Red"]Write a declaration statement of an array of integers to store 15 numbers. Initialise the first 5 values.
When I open the Visual Studio 2005 I don't see the template i.e. Win32 Applications, C++
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Jun 5, 2011
This is my coding for button Next and Previous but when I click on next it just goes to next like from pictures 1 and 2 to pic 3 and 4 but not any more because i have pictures in two imagelist upto 20 but it doesnt work and the coding for button previous also doesnt work same problem.
Next Button Coding
Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNext.Click
Static imagenumber As Integer
Try
[code]...
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Feb 2, 2011
i have to get this off my chest.Forgive me... I'm a relative newbie stuck in the vb6 world because of my job.vb6 to vb .net is a huge change in the way one has to program (and to think). I never could figure out the big picture of things with .net.Everything is a class..? What's with all of this... Class this, Interface to a class, inheritance (of classes) here, casting? polymorphism.
As a newbie to vb.net (I use 2008)... I just wanted to say this out loud and see if i can even get my terms correct. Vb6 is a good language for beginners but not a real professional language and (vb6) is effectively a watered down, lazy man's (quick and dirty) way of creating programs to solve some particular task.
[Code]...
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