Why a public variable is not retaining it's value when exiting a subroutine.
I want to search through an array and if a condition is hit then the subroutine exited (thereby holding the index value of a variable named MarkerNo)[code]...
how do you save the value of a variable for later if the application is closed and reopened in winforms, vb.net?
View 2 RepliesThere is a check box in my webform. whenever i tick it ..and click on back button it will not retain its state ..when i comeback using the next button to the same page.Note: view state is enabled in the control There is no code in the page load event
Code below:
Protected Sub chkBx_SR_wu_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles chkBx_SR_wu.SelectedIndexChanged
[code].....
I have a datalist control that is not retaining it values during postback when the control causing the postback is outside of the update panel that the Datalist resides in. I have verified that viewstate is on for that usercontrol as well as all its parent controls. My basic situation is that I have a Datalist that contains a user control on a page. When the user selects several rows in a grid and presses a button, a datatable is filled on the backend and assigned to the Datalist which has its item template set to the UserControl.
On ItemDataBound I set specific properties in the control which customize the messages on that control to the specific item. This is then popped up using the AJAX Control Toolkit Modal Popup[ Extender. When the user presses Save the whole page posts back. Data is collected from the user controls and saved to the DB and the popup disappears. The issue I am currently having is that the DataList has 0 items when the save button is pressed instead of the appropriate number. THis issue just started appearing after we upgraded from .NET 2.0 to .NET 3.5.
Throughout our program, forms are opened like this[code]...
The problem is that when forms are closed, they seem to not really be closed, only hidden - if I add some text to a textbox and close/reopen the form, the text is still there, rather than the textbox being cleared like normal. This is presumably because the form always uses the same instance.
Is there any easy way to fix this other than going through the entire program and creating a new form instance for every ShowDialog() call (there are hundreds)?
I can't remember very well the instances where my selected items has disappeared as if I did a "Reset ToolBox", the last time I remember was when I installed the Service Pack early this year. But last year I think it has been reset frequently and I find it bothersome to reselect all those items again and again.Is there any configuration that I could set so that my selected items are safeguarded, that is they won't be removed no matter what?
View 4 RepliesI have a structure with 6 arrays inside it that is serializable so I can save the arraylist of them to a file and load them from the file. This part works.
When loaded from the file the data from a single specific record is populated to a listview control, this works on form load. The user can then select different records and in theory display the data in them (specifically the stuff in the arrays).
Displaying the data works as I'm editing the data, and on first load of the form and displaying the "default" record from the structures. Any other time (trying to switch between records during editing or after loading) the record is pulled (as shown by stepping through the code line by line) but the data in the arrays in the structure and only the data in the arrays is missing.
I've gone through all the code that runs and there is nothing that overwrites the array data in the records between displays so I'm at a complete loss as to why this data is going missing.
Below is the structure and the code.
Defined in a Module so as to be accessible when needed in several places through the program:
Public JBonus As New JobBonuses
Public JBonuslist As New ArrayList
On load to set dimensions to the arrays:
JBonus.Str = New Integer(999) {}
JBonus.Agi = New Integer(999) {}
JBonus.Vit = New Integer(999) {}
[Code].....
I have a project in VB.NET which is working fine which essentially has a Datagrid that has a TemplateColumn included which is a column of Checkboxes. The code to declare the datagrid is here...
<asp:datagrid id="dgDates" OnItemCommand="gridEventHandler" BorderColor="Black" BorderWidth="1px"
CellPadding="3" runat="server" AutoGenerateColumns="False" HorizontalAlign="Left" AllowSorting="True"
[Code]....
everything you see sbove is working perfectly fine...in the sense that when I click one of the checkboxes, the page_load fires, the gridItemDataBound fires on DataBind() and when all is done, the checkbox retains the value that the user clicked the checkbox.
With all this exact same code converted to C#....the events all fire in the same order, but the checkbox selected value always clears...
how I can make a progress bar change colors while retaining the look of a Windows 7 Progress Bar. What I mean is, default it show the green. However, setting backcolor and forecolor does not affect the progress bar while XP styles is enabled.
What I am trying to do is make the progress bar the red progress bar if an error is encountered. I have the error solution set up, I just need it where the progress bar turns to red if the event of the download is stopped by internet connection being disconnected.
Visual Basic for Applications (VBA) Information
Visual Basic for Applications (VBA) MSDN Forum
Convert C# to VB.Net
I add columns to my dataset but when start my application again columns are not there
[Code]...
How do I effectively declare a Global Array which I can access the values of that array from any procedure? I have a Userform from which I will call various sub procedures depending on the actions performed on the useform. I have one procedure (Procedure1) where I have set up a multidimensional array and input values to it. I have another procedure (Prodedure2) where I want to access the values in the array - I DO NOT want to pass the array values directly from Procedure1 to Procedure2.
View 5 RepliesI am populating a Checkedlistbox "lstExpert" from table "TableA" succesfully. Whenever an item is checked in the Checkedlistbox "lstExpert", i am saving it into another table "GroupExpert".
[code...]
Is it the right way to do by comparing index in Checkedlistbox "lstExpert" and "Listbox1" Is there a way to bind it directly to the table "GroupExpert" meaning if the value of the Checkedlistbox "lstExpert" is present in the "GroupExpert" then the item will be cheked... I tried the following code and nothing seems to work.[code...]
This loads the list of items from the text file
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim StreamReader1 As New IO.StreamReader("L:\Glossary\Glossary.txt")
[code]......
I have a DataGridView bound to a binding source. I have also, however, added an unbound column in which I plan on putting numbers calculated from the bound columns. The problem is, Any time I edit my unbound column (on any row), the value doesn't stay. If I programmatically edit the values, they never show up. If I type in the cell, then upon hitting enter or clicking outside of the cell, whatever I typed disappears.
View 1 RepliesI have written a program to add a timestamp to a data sheet which had the time in seconds at which a sample was taken. The sampling was done every 0.1 seconds i.e 10 Hz sampling rate.The code I wrote enables one to select a file to which the time stamp must be added, and then runs a macro from excel when you click "Add Timestamp".
I am having a problem destroying the objects though so that they don't end up hanging around in the background. If Excel is already open I do not want it to close at the end of the program, I want Excel to simply return to its state before the application was run in order to prevent losing data on another unrelated excel task which may be open. The macro which is called closes any sheets which it opens. The other problem I am having is that if the program encounters an error there are a number of Excel objects floating in the background. My code is posted below.
Imports Microsoft.Office.Interop.Excel
Imports System.Runtime.InteropServices
Public Class Form1
[code]....
I've previously posted with regards to searching for a string within Excel, although the replies were enough to get my application 'working' the solution was riddled with over-complicated methods.Therefore I bought some books and figured it out for myself and came up with the below (which works like a charm may I add).
Dim oExcel As New Microsoft.Office.Interop.Excel.Application
Dim oBook As Microsoft.Office.Interop.Excel.Workbook
Dim oSheet As Microsoft.Office.Interop.Excel.Worksheet
[code]....
None of these (even if combined) make ANY effect whatsoever.I have also saved the workbook on exit, again to no avail.
Trying to exit an application but can't seem to kill it without an error."An error occurred creating the form. See Exception.InnerException for details. The error is: The form referred to itself during construction from a default instance, which led to infinite recursion. Within the Form's constructor refer to the form using 'Me.'"The form hasn't loaded yet, it is still in the process of looking for a file to load, if the user doesn't want to specify a working directory, that is their choice, but I need to close the app since it can't continue without it.I'm stuck in a class and can't get back to the main form without it continuing to load everything up. I wan't to force a shut down. [code] I was trying to get back to the main form without loading any more from the class to kill it there. [code]
View 6 RepliesI have a project that has three windows running at the same time, and exiting anyone one of them leave the others windows running.What is the best way in the code to stop the whole thing executing?
View 1 RepliesI find myself frequently turning off Intellisense because it adds wrong choices to my code. For example if I try to type "i " (without the quotes) it causes "int " to be put into my code. If I type "for " it may put "form " into my text.
Reaching for the ESC key constantly slows down my typing. (It's such a long way to reach for small hands). Is there an alternative way to exit out of intellisense without the highlighted choice being placed into my code, or is a way I can define a different key for this purpose?
I want to make a button that opens a program. Just for the sake of this post, we'll call the program Notepad.I want the users of my program to open Notepad, but not everyone saves Notepad in the same location. Is it possible to save a value (and the text in the TextBox) so the user doesn't have to retype it every time the program loads?
View 4 RepliesI created this function to remove vbCrLf from the values of properties in a Custom Class:(vTransaction)
Public Function ValidateTransaction(ByRef vTransaction)
Dim property1 As String
Dim value1 As String
For Each p As System.Reflection.PropertyInfo In vTransaction.GetType().GetProperties()
If p.CanRead Then
[Code]...
Throughout testing I can verify that vbCrLf is being replaced with a space as expected. When I re-examine vTransaction the changes have not been retained and the vbCrlf's are still there. What do I need to do to retain the changes being made to values in vTransaction.
I am developing a COM Add-in using VB.NET in Visual Studio 2008 Pro for Outlook 2003 and am having trouble assigning images to custom toolbar buttons. In a nutshell, I am having to convert from an Icon type to a stdole.IPictureDisp type so that I can assign my buttons a picture. The picture displays, but it loses the Alpha channel and the background is no longer transparent. I can verify that before the conversion to IPictureDisp object, that the PixelFormat property is set to Format32bppArgb (2498570). I am using a coding technique suggested here:[URL]. For C# users, this link [URL] shows how to modify the IPictureDisp one pixel at a time and rebuild the transparency, but I can't find similar functions in VB.NET...
View 1 RepliesI'm trying to program a personal project, but I've hit a bit of a bump in the road.I've got a Button, a Textbox, and a CheckedListBox; when the button is pressed, whatever is in the TextBox is added to the CheckedListBox. However, when the form is closed and reopened, all of the CheckedListBox's items are no longer present. My CheckedListBox's name in the code is ZapList.
Can someone assist me in, not only saving all of the CheckedListBox's items, but retaining whether or not they were checked as well as the order they were in? I've run out of hair to pull (figuratively) and I really don't want to quit this project, too much effort has gone into it and I'd hate to see it go unfinished like my numerous other projects. :icon_cry:
I have a simple for loop with the following code
For i As Integer = 0 To 4
Snake(i).X = (120 - 20 * i)
Snake(i).Y = 120
SnakeBody(i).Location = New Point(Snake(i).X, Snake(i).Y)
Snake(i).Facing = 3
Next i
But for some reason I unable to debug it. I place a breakpoint on the line Snake(i).X = (120 - 20 * i) and When I try to see what the values are the second time the loop iterates it simply exits the loop.
the application I am developing does not exit completely. i.e. the process can be seen in the Task manager. This happens only when I click on the [X] button on the title bar of the window of my MDI form. If I use the File >> Exit in the menu of my application, it exits without leaving any traces. I have used the "End" method there. But the process stays when I click the [X] on the control box on the title bar.
View 6 RepliesI have a circumstance where I'm popping up a dialog window containing a "Please Wait" message, running an SQL query, then replacing the "Please Wait" message with a DataGridView containing the collected results.The code I'm using for this is basically:
Dim X As New Data.SqlClient.SqlCommand
X.CommandText = "SELECT some_data FROM someTable"
Dim XAdapter As New System.Data.SqlClient.SqlDataAdapter(X)
[code]....
I would like to put the retrieval of this data into a background thread, so that the UI doesn't freeze up while I'm loading larger datasets, but, having done this, I'd also like to allow the user to cancel and close the dialog, if accessing the data takes longer than they want to wait.At the moment, this Dialog window can take some arbitrary SQL string and display the results (using SQLDataAdapter) without any extra code.How can I make this process interruptible, while also retaining the ease of access of the SQLDataAdapter?
I have two forms, one has a textbox on it the other also has textbox on it. Form1's textbox is the source for text found. form2's textbox contains the search criteria.
This the code that I quickly bashed out to do a find functionality of a textbox. The problem is the last line of code. If I use the last line of code the the Source Form.s textbox is highlighted however if the Source Form is Maximised then the Find form will be hehind the Source Form. I don't want that to happen. Secondondly if I dont use the last line of code then the the text isn't seleceted at all.
Private Sub DoFind(ByVal xControl As Control)
Dim x As Boolean = TypeOf xControl Is TextBox
Static Dim lastfoundPosition As Integer = 1
[Code]....
how do i add an already exiting .exe or file etc. to vb window form? i mean like make it execute just by clicking on a button or link lable. example like "linklable1" *click* -open up the file or .exe-
here is my code so far
Imports UpdateVB
Public Class Form1
Public updater As New UpdateVB.UpdateVB
[Code].....
i manage to get my dropdown list working, but when change related data in the built program, it does not save it when exiting the program. How do I save the data when exiting?My database name is Database1.sdf?
View 2 RepliesI need to exit a loop when the spacebar is pressed. [code]
View 18 Replies