[code]I get an error that the connection to the IMAP server has disconnected because the suspend event is not triggered until the computer wakes. How do I get the trigger before the computer sleeps?
View 2 RepliesI use the following code in a Sub called "updateDb" to accept changes back to the Db, etc. in the .CellEndEdit event from a DataGridView:
Try
' Write changes back to actual .mdb file
' Accept changes from DataGridView object
Me.Validate()
[code]....
Which is the most appropriate event to handle for this task? Right now I'm calling the updatedDb sub when the .CellEndEdit event triggers and when the .UserAddedRows event triggers.
I am trying to use a separate thread to handle specific events in VB.Net. The idea being that I do not want the main application to be held up if a particular event handler takes awhile to finish. How do I get my main thread loop to suspend the thread while allowing it to handle events when they occur?When I create a Windows Forms application, there is a UI thread that handles the UI events. I do not imagine that this thread is continuously polling some variable to see if someone has pressed a button. I imagine the thread is suspended until the OS tells it there is something to do. I was trying to figure out how to ensure that my event handlers were not being executed by the UI thread. From what I have read, I can do this by raising the events from a different thread. But what does that thread do while it is waiting for other events, just exit?
I wanted to know how to create a thread that works like the UI thread, only it processes the events I want it to process. I am not sure how events work in .Net. I understand that event handlers are run on the thread that raises the event. I believe that .Net allocates threads from some thread pool to process events such as timer events. I am not clear on how it works, though, and what those threads are doing when they are not handling events.
I have a custom class. I would like to add an event that triggers when the form it is on resizes. Is there a way to do this?
View 1 RepliesI am using an activeX control to read data from an external source. This data is processed in 5 second increments. Each piece of data is passed through an event. When the event triggers I call a "decision" procedure from the event to process the data and make decisions on what to do, i.e. call other procedures, store the data, etc... This works fine when I have a small number of samples (around 10), however, when the number of samples increases to say 100, that is I am recieving 100 pieces of data every 5 seconds, the "decision" procedure does not fully run. Is it possible that the event trigger is causing the code to exit the "decision" procedure prematurely? I know that the "Decision" procedure starts since I have written data from the beginning of the procedure but not the end of it. how to handle the rapid event triggers?
View 7 RepliesAnyone know how to make the return key used in a text box trigger an event?
View 3 RepliesI have a datagridview which is populated from the SelectionChangeCommitted event of the combobox. The datagridview contains both bound and unbound data columns (see below).
View 1 RepliesI have a message box with YesNoCancel button..
Pressing Yes will do some action and close the app - works fine,
Pressing No will do nothing and close the app - (see below),
Pressing Cancel will Do nothing and keep the app open - (see below).
I'm using DialogResult.No for No button and DialogResult.Cancel for cancel button. But pressing either of them triggers DialogResult.Cancel event. Whats the problem?
I'm working on a program with a fairly complex graphical interface. Due to the volume of information possible in the interface, the tooltip, or something like it, seems likely to be a fairly critical means of obtaining feedback. However, after a bit of testing, there are a few features that I am not really enamored with. First, I am changing the tooltip text dynamically based on the portion of a control that the mouse hovers over. This is done in the Hover event handler. What I am seeing is that once the hover event is raised once for a control, it appears not to be raised for that control again unless the mouse leaves the control and re-enters. Therefore, the tooltip is set based on where the mouse hovers the first time it hovers on the control, then doesn't change until the mouse has left the control.
More disturbingly, the tooltip sometimes doesn't show up at all. It appears that if I am quick enough about moving the mouse over the control, then hovering does nothing and no tooltip shows up at all. The way to get the tooltip to show up is to move the mouse smoothly, and somewhat slowly, over the control, then pause. As long as the motion is slow enough, the tooltip always shows up. However, if the mouse is then moved, the tooltip goes away, and won't return until the mouse has left the control and come back to it. So basically, First, I will look into showing something on MouseMove rather than Hover, as Hover appears to be inconsistent, at best. Yet that doesn't solve the problem that the tooltip is too inconsistent in behavior. Is there an alternative, or timing property settings for the tooltip that improves responsiveness?
I am writing a web page, on this web page there is a txtStart and txtEnd. Next to them I have Calendar ImageButtons. I would like to code it so when the ImageButton is clicked a calendar popup appears and when they select a date on the popup it goes away and the date is populated into the txt. Format MM/DD/YYYY. Can anyone help me? I have been looking online for hours now and only find solutions for C# users or for a seperate page all together. I am writing my code in VB and I cannot make new pages. Here is my web page code:
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="PSInventoryRelease.aspx.vb" Inherits="DigeControlCenter.PSInventoryRelease" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="TC" %>
[code]....
I've been searching for the answer for this all over, but I can't seem to find the solution. I have no idea how do this. A code that triggers an event after multiple command buttons are pressed in a certain order. For example: I press Command1, then Command2, then Command8, then Command5, then an event happens. It's kind of similar to entering a code to activate something.
View 4 RepliesIs there a way for suspend a process using vb.net. For example, while my program running background, it should wait for other programs (like X.exe) run and suspend them. With my permission (X.exe) will continue to do its job. If i reject, then terminate them.
View 5 RepliesIs it possible in visual basic to suspend and resume processes. As in entirely pause a process (threads)?I mean an external thread. I'm using Visual Basic 2010 Express btw.
View 1 RepliesI have a a main thread and another background thread that does some work (see below).I want to do something within my worker thread and then wait until some other event happens in the main thread before continuing. How do I do this? I thought I could use ManualResetEvent but I can't get it to work properly. I'm a bit confused about the Set, Reset, WaitOne methods and where exactly I should call them from.When the worker thread is suspended it shouldn't affect the main thread.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System. EventArgs) Handles MyBase.Load
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code]....
how to lock or suspend the form when i call another form and until that is finished this form should be locked.example: i got frmAddEditClient form and frmViewClients as another form, now i got list of clients in frmViewClients and i will select a client i would like to edit the client profile ( for which fuction is defined in frmAddEditClients) so on click of btnEdit in frmViewClients form i place code to [code]now i got everything working fine but i shud make the frmViewClient form to lock so that untill edit operation is done user should not change anything i.e is not selecting other ClientID. in the frmViewClient form.Once edit is done frmViewClient is unlocked and then clientId is refreshed.
View 1 RepliesIve got a container with a bunch of child textboxes stacked using dock top. My code updates the textboxes and they vertically expand/contract etc. I'm thinking that my code might run faster if I turn off the layout refreshing until all the updates to the textboxes are done.
I'm getting confused with what I'm reading about suspend/resume layout - do I need to suspend for ALL the child controls, then go through them all at the end and Resume individually?
I have created a windows service in C# .net and now I want it to alert me if its going to shutdown. For this I make use of Dispose/Unload events but now I want if the services are stopping due to system shutdown process it will alert me.
View 1 RepliesI am looking to introduce a suspend and a resume feature into my program however [code] is there any way to introduce this feature..
View 2 RepliesLooking for a solution to pause and resume a thread. When I use suspend and resume it says its no longer supported. Here is the code. I'm just trying to get it to cycle between two "do until" events.
[Code]...
I have a DataGridView that uses a BindingSource that has a DataTable as it's DataSource. If I filter the DataGridView by using the BindingSource filter on a particular column, then I change a cell value in that same column the row disappears. For example, if I filter my "Shipped" column which contains CheckBoxes to only show True and then I set one of the CheckBoxes to False the row disappears from the DataGridView.
I do not want the row to disappear until the BindingSource filter is changed or removed. How can I suspend the BindingSource filter and then resume the filter if the filter has changed? I want it to work like MS Excel's filter. If you filter a column in Excel to only show cells that equal "Apple", then change the cell to "Banana" the row still shows, but if you change the filter the "Banana" row is removed. This how I want my BindingSource filter to work.
I have this question about the control triggers, I have this project that have textbox, using it's textChanged function and setting the autopostback in to true.
Now, when I trace the command I have notice that the function have been triggered twice, and I just want to know now how that happens and how I can set this to trigger only once.
Is it possible to list all triggers in all tables on a database?I can list all user stored procedures with:
Private Sub StoredPro()
Dim theServer As Server = New Server(serverName)
Dim myDB As Database = theServer.Databases("mydatabase")
Dim dt As DataTable = myDB.EnumObjects(DatabaseObjectTypes.StoredProcedure)
End Sub
But nothing obvious in SMO for triggers. (I'm actually trying to list just custom triggers, any that are not named DEL_tablename, INS_tablename, UPD_tablename) within the selected database.
the MouseWheel event triggers 3 times every time i scroll ... this i believe is because i have my wheel set in windows to scroll 3 lines at a time but i am updating a "zoom" and only want it to trigger 1ce per wheel movement any ideas?
View 9 RepliesIs there anyway to suspend a for next loop until a textbox has been filled in and the keyboard enter has been press
Dim playersname(7) As String
Dim players As Integer = 7
[CODE]...
Is it possible to wait/suspend execution for a certain amout of time without hanging the main UI thread?
View 7 RepliesI am currently rewriting an Access application to VB. The database was already MySQL 5 with the Access application - solely used for the forms and reports. In access the MySQL database is accessed though ODBC, in VB via a .NET connector.
The problem is the following:
In the MySQL DB I have a trigger to create a UUID (or a GUID if you prefer) as a "Before Insert" trigger.With Access, the record creation works fine, and the UUID is created flawlessly.With VB, the record creation is stopped by VB when trying to insert/save the record - saying the DB requires the field UUID not to be null. Although this is right (it is mandatory in the record creation in the DB), it obviously does not take into account the MySQL trigger (and how could it?).How do you get rid of the validation for this field?
In my master page there is a submit button for the site search. On most pages this is only triggered if enter is hit whilst the search box has focus. On a couple of pages though hitting enter on the main form it triggers the search submit. I know that I could fix this by enclosing the search in it's own form tag and then changing every page to have it's own form tag, but I need something that is a lot simpler as a fix as I'm low on time. Is there a way I can tie the text boxes in the form to the correct submit button?
View 1 RepliesI found this mystifying in VB6 and it's still here...
For example - I have a combobox on a form and I have put some code in its SelectedIndexChanged event. The problem is that I want this code to be executed *only* when the user clicks on an item in the combobox dropdown. Why is it then that it gets executed when the form first loads? And how do I stop this happening?
I used to use a "FormLoading" boolean to decide whether or not the code was executed but this surely shouldn't be necessary. Is there a better way?
I have a class in VB.NET that has a method (called CurrentValue) that returns a number. There is also an event that the class raises to indicate the number has changed. In the event handler on my form, I update a textbox using the exposed method.[code]When I run this I get a "Debugger.Runtime.CrossThreadMessagingException" error. What could be doing this? I am instantiating MyClass in the same form that contains the textbox.I can also set properties of the MyClass object without any trouble.
View 1 RepliesI have a program that will print dwg and idw drawings to different printers. from our drawing vault we kan use a plotbutton which creates a pcf-file (text file) and copies the drawing to a specific location. the program reads the pcf file which contains the max printsize for the drawing, who is printing it, nr of copies, location of the drawing. all data is written to or read from a small database. as long as there are drawings the printing goes fine, they are listed in a datagridview on the form. As soon as the last record is removed from the datagridview I get the following error[code]...
View 2 Replies