Trap Tab Key In Combobox?
Mar 16, 2010I'm using Vs2008 and I have a combox in a Windows form.I woud like to know how I can capture the tab key after the user has select an item in the combobox.
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How To Trap 'F1' Key Pressed Or Not
Jan 27, 2010'pressing F1 key on main form. I dont know how to trap whether user pressed F1 key or not
Private Sub frmMain_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
Dim KeyAscii As Long = Asc(e.KeyChar)
[code]....
FileUpload - How To Trap Maxfilesize
Aug 26, 2006The fileupload control works well for files < 4MB (maxrequestlength), but if the file is larger than this the program fails with: - Server error in '/xxxxx' application Maximum request length exceededHow do I trap this so that I can return a better error message? The failure occurs before the Page Load from any callback, so I can't see any way of trapping the error, and I haven't seen any event or property of the Fileupload control that I can set to say "Do this when Max Request Length is exceeded"
View 16 RepliesHow To Trap DataGridViewComboBox Events
Dec 8, 2009Does anyone know how to trap f.i. the SelectedIndexChanged event in order to read the SelectedValue from the ComboBoxColumn?
View 8 RepliesTrap CTRL-Z With Keypressevent?
Dec 7, 2009With the component I am using, I only have a keypress event. So I cannot seem to figure out how to trap the control key. The lower case z is reported as keyascii 90 and the upper Z is 122 but can't get the control to show me when debugging. This is where I'm at (trying different ways, none working) Can someone tell me how to trap a ctrl-z correctly with this keypressevent?
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Trap Event Of New Control
Apr 22, 2010I have the problem in VBA for Access, but I assume that it is related to Visual Basic as a whole as well.
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Trap Event Of New Control?
May 16, 2012I have the problem in VBA for Access, but I assume that it is related to Visual Basic as a whole as well.I have the following code:
public sub NavigateIE
dim ieobj as shdocvw.internetexplorer
ieob.navigate ("Some URL")
end sub
[code]....
How can I link the DocumentComplete event of ieobj to the subroutine named customeventforieobj?
Trap Key When DateTimePicker Dropdown?
Apr 14, 2011Are there any way to trap key when the DateTimePicker is dropdowned?
I have tryed many ways but no effect.
C# - Custom SNMP Trap Implementation In .Net?
Oct 2, 2009I need to create a monitoring mechanism using SNMP (in .Net). I think we'll be using an nsoftware component to handle most of the work. It appears we must use 'traps' to communicate from the agent to the server. We'll have a number of different traps and various information detailing each trap. What is the best way to implement custom traps? That is, what is the best way to not only send a trap, but also send the information describing the trap to our 'snmp manager'? I think this is done through "variable bindings". To use "variable bindings" do we need to create our own "enterprise number" and use an "enterpriseSpecific" trap? Should we implement our own, custom MIBs or can we just send the data we need with the trap (via variable bindings)?
View 2 RepliesJavascript - How To Send SNMP Trap To Different IP
Jul 30, 2009I have the an ASCII message of SNMP traps, how can i sent it to different IP address? i dont want to use email instead. Given a IP address and the port, of that receiver machine. tell me the solution or where can i get references to the command at least. coz i could find anything regarding it.
View 2 RepliesKeyPress To Trap A Decimal Or Period?
Nov 8, 2009I am trying to prevent the user from typing dupilicate decimals or periods into a data entry form. The code below has all been tried and yes, there was a do something in there. This is just a sample of what I tried. When I could not trap "." I moved through various renditions of the e.keyvalue still no luck. I know it is simple and stupid but it darn sure escapes me...
If e.KeyValue = 110 Then 'NUMPAD DECIMAL
If Me.MultiplierTextBox.Text = "." Then
End If
[Code]....
Trap A Connection String That Is Disconnected?
Sep 11, 2009How do i trap a connection string that is disconnected?
View 5 RepliesTrap An Error Response And Timer
Jul 1, 2009In my Timer codes[code]...
How can I add this statement or condition?
If the Response is > 1, my timer will tick and go to next item in listbox (means successful).[code]...
Trap The Data From The Scales And Then Update The DB?
May 9, 2012I am trying to build a socket program and I need your help.The program is to be used for Scales.I need to trap the data from the scales and then update the DB.
View 2 RepliesVS 2010 Unable To Trap Error
Feb 4, 2012review the following code; it is not able to trap the error and the code errors out (OleDbException was unhandled) on the code marked with *
Private sub SaveEmployee()
Try
gConn = New OleDbConnection(sConn)
[Code].....
Listview With Checkboxes - Trap Mousemove Event?
May 19, 2009I am using VS 2008. I have a listview control whitch 'checkboxes' property enabled.My question is: how can I trap a MouseMove event over an item only, excluding the associated checkbox?I have the following code in MouseMove event of the ListView control but it cannot differentiate between an 'item' and a 'checkbox:
Private Sub mylstview_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles mylstview.MouseMove
Dim oListViewItem As ListViewItem[code]....
Trap Any Exceptions With Try Catch Finally If The Reader?
Apr 8, 2011I have a SqlDataReader and I want to trap any exceptions with Try Catch Finally if the reader =cmd.ExecuteReader() statement fails. If this statement throws an exception do I need to close the reader? If so, where. Wherever I place the reader.close() statement I get an error that the reader has not been assigned a value yet.
View 2 RepliesTrap Error For Incorrect Data Type
Feb 10, 2009i want to enter date in the format of dd/mm/yyyy (30/03/2009) in a textbox. when a click on the button, if nothing or wrong format is enter, will pop up msgbox saying wrong format.
View 14 RepliesTrap Exceptions In Thread Pool Threads?
Jun 15, 2012I have a thread pool that send file using ftp protocol. I encapsulated the call for threadpoll with try catch believing that the thrown exception inside the threadpool will be catch by the main thread. Instead the system terminate whenever i throw an exception from inside the threadpool. Also I design the Clsftp.ftpsend class to throw an exception related to ftp error. Basically my design for handling the error is just like the code below.
'Main thread
Private Sub BttnStartSending_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BttnStartSending.Click
try
Dim objparam As New ThreadParameter
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VS 2005 Form Level Exception Trap
Apr 1, 2009I have a form with a button that brings up a different form. In some versions of this program (don't ask), the second form is shown non-modally, but in my version it is shown modally. The point of that last statement is that the second form can be either modal or non-modal, so an answer needs to handle either one, but the modal option is more valuable.If form 2 throws an exception that is not handled, the exception is caught somewhere on Form1, though the exact place that it is caught is largely dependent on where the exception was thrown from. The question is this: I need a means to trap all exceptions raised on Form2 or anything called from Form2 such that no exception EVER propagates out of Form2 to be caught in Form1. The reason for this is that Form2 HAS to perform some cleanup for reasons that I have zero control over. That cleanup doesn not absolutely require user input, but it would be good to have some.Is there any event that is fired if a form is exited due to a call stack unwinding as an unhandled exception propagates up the stack?
View 7 RepliesVS 2008 - New Row / Cell Value Being Deleted In DGV On Error Trap
Oct 4, 2009How do I stop the new data row/cell value from being deleted if an error occurs. I am using the DATAERROR event to trap the error as shown below:
Private Sub RoomPricingDGV_DataError(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewDataErrorEventArgs) Handles RoomPricingDGV.DataError
e.Cancel = False
If e.ColumnIndex = 1 Or e.ColumnIndex = 2 Then
MsgBox("Invalid Date. Please Re-enter! ", MsgBoxStyle.Critical, "Room Pricing")
RoomPricingDGV.Columns(e.ColumnIndex).Selected = True
End If
e.ThrowException = False
End Sub
What I want to happen is to go to the cell automatically where the error has occurred and get the user to change it, not have to retype the whole data row or move back to the previous cell. When using the MSHFLEXGRID in VB6, it was fairly staightforward to do.
VS 2008 Application Wide Event Trap
Mar 26, 2009How can I set up an application wide event trap that is triggered when my database connection status changes?i.e. no matter what form the user may be on if the connection is terminated for whatever reason a message box is displayed to the client requesting whether the program should try and reconnect with the database or not.
View 9 RepliesVS 2008 How To Error Trap White Space
Nov 18, 2009So I have no idea...ive looked around and can't find anything on error traping when a person doens't enter anything. Here is my code as is now...I trap for if the number goes above 36. now I just need to trap the whitespace
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Way To Trap The Event Of MDI Child Loading For The First Time?
Jun 23, 2009I'm trying to force an always maximize setting
View 1 RepliesTrap Checked / Unchecked State Of A Datetimepicker Through An Event?
Mar 14, 2009In Vb.net 2005 how can i trap the checked/unchecked state of a datetimepicker through an event. I'm trying to execute two different methods based on the checked/unchecked state of a datetimepicker when the user clicks the datetimepicker. When the user checks the dtPicker Method A is executed, when the user unchecks it Method B is executed. How can i trap it.
View 1 Replies.net - Trap The Keyboard Strokes On A C# Win Forms Application (CTRl + Alt +Del)
Aug 18, 2009Is there Any way to handle the crtl + Alt + Del Key combination. Take for instance in a quiz application (Win Forms ), the user should not be able to switch to other windows till the test is over.
I'm able to capture the ctrl and alt key strokes individually, using c# standard properties. but once they user hits the del key . The control goes out of my appliation and windows handles it.
Trap Errors And Display Friendly Messages To Users
Oct 20, 2010I like to user custom errors in my site. The Idea is to trap errors and display friendly meaningful messages to users. The real error details (line number, Page ...) will sent to me by e-mail. I am programming in VB.NET. Until now every code that i found about this say's that i must use the global.asax for it. I do not like to use global.asax, I just like to make an error page that will sent me a -email with all the error details. Until now, I go to the web.config file and insert this line:
<customErrors defaultRedirect="test.aspx" mode="On"></customErrors>
test.aspx looks like this:
Sub Page_Error(sender as Object, e as EventArgs)
Dim ctxOBJ As HttpContext
Dim exceptionOBJ As Exception
Dim errorInfoTXT As String
[Code] ....
When here is an error in some page its redirect me to test.aspx but not showing any error.
Trap/check For Any Edits In A DataRowVersion.Proposed Method?
Nov 23, 2010I am attempting to trap/check for any edits in a DataRowVersion.Proposed method
Why am I not able to see the changes from a bound field (to a textbox) from a DataSet? When I load the WindowsForm, I bind the TextBox:
If Not m_dsFIRE.Location(0).IsMHNull Then
Me.txtMH.Text = m_dsFIRE.Location(0).MH
orig_MH = m_dsFIRE.Location(0).MH
[Code]....
Aggregating Error Trap - Textbox That Is Used To Add Directories To A System Folder
Dec 16, 2009I have a textbox that is used to add directories to a system folder, each name seperated by a line. If the textbox has text value "Test " that is "Test" & controlchars.newline & "" (not like this is coded, it's typed in), then if i use loop for each part as string in textbox1.text.split(controlchars.newline), the first part will be "Test", the second part will say " " when i run step by step debugger, but if i try and block the addition of a folder by "if part = " "" it does not catch it. I've tried comparing part to "", " ", nothing (which is illogical anyways), and i even tried creating a boolean variable equal to the statment to try and catch it but the program insists that part is not " " even though the debugger tells me that is the value of part.
View 9 RepliesForms :: Trap The Checked/unchecked State Of A Datetimepicker Through An Event?
Mar 14, 2009How can i trap the checked/unchecked state of a datetimepicker through an event. I'm trying to execute two different methods based on the checked/unchecked state of a datetimepicker when the user clicks the datetimepicker. When the user checks the dtPicker Method A is executed, when the user unchecks it Method B is executed. How can i trap it.
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