Forms :: Get The Name Of The Control That Calls The OnEnter?
May 31, 2009
I'm just starting to look at Custom Controls after watching a MS video online. Video Training - WindowsClient.net I wondered if it's possible to get the name of the control that calls the OnEnter event that I am running.
[Code]...
I wanted to add a new combobox to the form and it always call this GetComboList each time OnEnter BUT I need to pass the combobox that the onEnter is firing from. Would save code and give me an insight into how custom controls work.
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Apr 7, 2009
I'm using VB.NET 2005 trying to create a options form that lets you select the serial port to use I'm using:
HTML Code:
Sub GetSerialPortNames()
' Show all available COM ports.
For Each sp As String In My.Computer.Ports.SerialPortNames
Serial_list.Items.Add(sp)
Next
End Sub
To create a list of ports this works then using
[Code] .....
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Jun 2, 2012
I am trying to access a dynamically generated Control from a separate thread. But I am always getting a "Stack Overflow Exception" with my code. I am using following code:
[Code]...
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May 8, 2010
What the Win32 API is? I have looked around but no where really outlines what it is. Is it basically a set of procedures, outlined by Microsoft for programmers in order to get services from the operating system? In essence is it the equivalent to making system calls abd and library calls in UNIX? And yes I now Windows makes library calls too.
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Oct 1, 2009
I'm working with the DevExpress XtraGrid control.I have a routine that goes thru and adds all the controls on the current form dynamically, and launches on a seperate thread the routine for a given control to initialize it to the value that will be displayed to the end-user. Some of the controls are displaying calculated values, and take some time to return their values, so that's why we are doing it on a seperate thread.
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I'm using a similar snippet of code for any control properties that have to be updated, and all work fine. On the above code when the actual Invoke is called, it APPEARS that the thread just ends and never calls the delegate, and doesn't return to finish either.
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Sep 1, 2010
Hint: this one might sound complicated, because I am trying to give as much info as possible, but I suspect that I just want someone to tell me "yes, you are correct".On this legacy system, which dates from 2002, the user visits a web page and uses an RFID reader to read a tag number, which is then written to an input field on the web page.
The only s/w that comes with the reader is a custom DLL, nop .exe. The very sparse documentation insists that only MSIE be used and that all security relating to ActiveX be disabled.When I look into the source of the web page I see calls to functions in the DLL.Now, here's the fun part: I know zilch about ActiveX, I have to make a minor change to the DLL _but_ the VB6 source code has been lost, so I guess that I have to recreate the (seemingly very simple) DLL from scratch - this week.
Decompiling the DLL shows me the functions (locateReader, getTagVal, closeReader). However, by decompiling I can't really know the number or type of the parameters, nor the return values ... and if anyone knows the API they are refusing to share it, but basically it all seems to have been lost in the mists of time as companies went bust, were bought & sold, merged & demerged and the initial DLL might have been written by an external guy, but no one knows who.So, can I get the function params & type from the ASP page source?I see things like
Reader = new ActiveXObject("<dllName>.Reader");
Reader.locateReader();
tagVal = Reader.getTagVal();
Reader.closeReader();
I would say that none of the fn()s take parameters, that closeReader doesn't have to return anything; it looks like locateReader doesn't return anything either, so I guess that error handling will have to be in the DLL (loop forever with a popup demanding that a reader be attached; and getTagVal seems to return a string.
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Nov 30, 2010
MSDN brings nothing up, so here was my attempt at a work around.
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Because event leave calls another sub i need the last active control. I have the textbox name txtTime{0} but obviously string is not a control.
So Two questions:
1) can a string value be attached to an existing control if i know it's name? Dim attControl as Control = newTime
2) All this could be avoided in event leave if i could get the left controls name. I have tried sender. tostring etc but nothing returns the textboxs name
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Sep 22, 2011
I have a Windows Forms app that, unfortunately, must make calls to controls from a second thread. I've been using the thread-safe pattern described on the [URL].. Which has worked great in the past.
The specific problem I am having now: I have a WebBrowser control and I'm attempting to invoke the WebBrowser.Navigate() method using this Thread-Safe pattern and as a result I am getting StackOverflow exceptions. Here is the Thread-Safe Navigate method I've written.
[Code]...
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May 8, 2011
I have 10 PictureBox on a windows form (created in Design View) and a context menu strip is attached to each of them. I am trying to set the property of the PictureBox using the context menu.
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Jan 14, 2011
On a given application form, I have around 20 controls that I need to set in the main form. I have a separate thread that only needs to ready some properties from the controls on the application form It will never try to write to the form's controls.
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Mar 4, 2010
I have been using DBTransaction for my current projects that access a single database. However, I read some documentation on TransactionScope and was wondering in which scenario would using TransactionScope be better? Or should I be replacing DbTransaction calls with calls to TransactionScope?
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May 12, 2012
how I can control the tool tip popup or make calls to the text that displays based on a integer value. I'm wanting it to display a text based on a interger value inside an if statment for a picture box. So if the ingteger = 1 then tooltip.text = "" else tooltip.text = "" but that is not the correct syntax.
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Jul 9, 2009
I'm trying to make a label control transparent over a Panel control.However by setting the background colour of the label to Transparent, it actually sees right through to the form itself, not the panel as intended.
As an example we use a panel with a background as white, we make the label transparent, however it gets the form�s colour as blue.However, we are using a custom panel control and need the label to be transparent over the panel and not see the forms background.
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Feb 9, 2011
i have a splitter control on tab 2, a grid and a scheduler control on tab 3..looks fine...i save it....close the form...reopen the form, and the controls are all resized and moved around on me....and not for the better.
wierd thing is that when i run the app, the controls are placed properly, but design time is totally f&*ked up.I know this one isn't me. is it the tab control? should i just do toggle buttons at the top and show/hide my own panels? this is just too freaky to deal with. is there an easy work around for this?
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Feb 14, 2010
I have a winform project which I'm converting from a web project. In the web project I display "Notes" data from a data table into a table in three distinct parts. First the header, where the text color is based on the priority of the note. The second part is a short description of the note content and the third part is the complete note. The question I have is what is the best control for this in winforms? I guess I could use a text box and use it like a web text area. The data will be read only and will need to scroll since the amount of real estate on the screen accounts for only about a third of a 1024 X 768 screen.
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Apr 7, 2011
IDE: VB.NET (2008)I have an mdi form in my program. As usual this mdi form acts like a container to several child forms. However, I need to implement a tabbed system so that my forms rather than appearing in mdi form should appear in a tab page.So I inserted a tab control on my mdi form and when a form is added I say TabPage1.Controls.Add(Form). It seems to be working okay until I found out that now my form is like a control so methods like Me.GetActiveMDIChild etc won't work.
Generally when a particular child form is selected we can know when we see the titlebar. In this case because forms are added as controls there is no difference in the titlebar of a selected or non selected form.Can I determine which form is selected. Something like Me.ActiveMdiChild. I can go through control collection of a tab page to get a list of forms but figuring out which form is selected is something I don't know.
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Jan 12, 2012
I want to get a list of all students who were at one of two events. Here's my function to get an attendance list:
Private Function AttendanceList(ByVal Mode As AttendanceListLookupMode, ByVal AttendaceTypeID As Integer, ByVal EventID As Integer, ByVal EventOccurenceDate As Date) As IEnumerable(Of Integer)
'Get the attendance table for specified event[code].......
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Nov 21, 2009
i want to know how to use api calls in vb.net2008. in visual basic 6.0. we can find the list of api calls in add in manager . in vb.net2008 how to find it..
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Jun 16, 2010
For some time ago I have notice that my App on every start make a call to csc.exe and starts it. I have google-it and found out that csc.exe is some kind off on-the-fly compiler for C# (If I understand it correctly ) but my App is in VB.net. VB.Net code to make my App on every start calls csc.exe?
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Sep 8, 2010
I have the code which checks if there is a selected tab
Private Function GetBrowser() As WebBrowser
If TabControl1.SelectedTab IsNot Nothing Then
For Each c As Control In TabControl1.SelectedTab.Controls
If TypeOf (c) Is WebBrowser Then
Return c
[Code]...
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Sep 8, 2010
I have 3 forms. one main form with two buttons, that need to open one of the other two forms on clicking the button. Now when say button 2 is clicked then form 2 should open and also form form 2 person should be able to click back and come to main form.
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Mar 6, 2009
How do I controls the windows forms after placed the codes in the class library like to add the items on the listbox and change the text of the button using with friend withevents, how can i do that to make it work?[code]...
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Mar 7, 2009
how do I controls the windows forms after placed the codes in the class library like to add the items on the listbox and change the text of the button using with friend withevents, how can i do that to make it work??
The classlibrary UI:
Code:
Option Explicit On
Imports System
Imports System.Windows.Forms
[Code]....
The reason I want to do this as I want to reduce the codes as it is too much for the program to read it everything.
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Feb 18, 2009
I want to create A control Which should be a OCX or DLL and it should be able to run on both ASP Pages and Win forms.Which Template should i use.
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Aug 30, 2009
do wpf forms have a timer control?
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Sep 17, 2009
I'm quite new at this but I'm trying to change the look of a tab control other than the options provided in the control's properties. In short I want to create a large tab that will fit a picture but I don't know how to change the size of the tab. I also want to make the control look somewhat different than what the control provided with VS.NET looks like.
What I need to know is how to create a custom control that operates the same as tabcontrol but looks different than the traditional control provided with VS. I tried looking up how to create a custom control but all I could find was how to create one programatically and I don't know how it would apply to a tab control. Maybe the only way to do it is programmatically but I would rather play with the control in the designer than having it appear only at runtime.
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Jul 2, 2011
I put a button in my MDI Parent Form and then when I call my form inside the MDI form, the button is always on top of my Form1.
myForm= New Form1(idNumber)
myForm.MdiParent = Me
myForm.Show()
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Jul 4, 2011
How to create this control? What control is this that in the VS 2008? untitled.JPG
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Mar 2, 2010
actually i am using "MonthCalender" control in VB.net, i have 12controls on my form, i want each control to display different month,so i can have a full year calender, but i am unable to change themonths of the control. They all are displaying current month,
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Mar 23, 2009
i have 2 windows forms, form1 and form2.form1 has a label called "label1" and a button called "button1".This button when pressed, opens up Form2.Form2 has a textbox, "textbox1" and a button. This button, called "button2", when clicked does this:form1.label1.text=textbox1.textThis used to work PERFECTLY, but now it does not work! i dont know what went wrong, and ive made a lot of changes to the project so i cant track the last time it worked.
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