Any Way To Deep Copy Control?
Jan 31, 2010Is there any way possible to deep copy a Control? Just want to know if its possible
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Shallow Copy And Deep Copy
Dec 1, 2010As I understand it a shallow copy is like a CLONE copy of an object where the values for each property are independent of one another whereas a DEEP copy is a copy that uses the same memory locations and therefore if you change a value in one it is also shown in the second item ( By Reference to the same memory locations ).So my main question is, when dealing with CLASSEs, STRUCTUREs etcetera containing REFERENCE types.is there anyway to quickly create a CLONE or shallow copy of an OBJECT or not ? The only way I can think of is to put the item into a one dimensional array and use the CLONE method for an array. [code]
View 9 RepliesHow To Create Deep Copy Of Class
Jan 20, 2010I have created a form with a tab control that I want to be able to make a copy of in such a way that all the child controls and their data are copied as well. I have tried this:
Dim NewPage as TabPage = tcViews.TabPages.Item(0)
tcViews.TabPages.Add(NewPage)
I end up with a reference to the first page. That is, if I change something in the old page, it changes in the new one as well. I believe this is because VB.NET treats assignments of classes as references, rather than values. Hence only the memory address of the original is copied, so essentially both refer to the same tab page in memory. I also tried serialization and deserialization.
The TabPage is apparently not serializable. And I heard about MemberwiseClone, but it isn't accessible, according to Visual Studio. There doesn't appear to be a Clone method available either. How do I make a new tab page that is totally independent of the original, but that has copies of the original page's controls and their property data, which can then be edited independently of the originals?
Deep Copy Generic List Of Classes
Aug 15, 2006If I have a generic.list(of ClassA), is there a simple way to create a deep copy of this list that will not affect the original copy? It seems to work if I have a generic list of Structures, but for some reason the copy constructor for lists of classes only copies pointers to the elements (or maybe a pointer to the whole list?). I would move to structures if it were not for the fact that I can't find a way to edit the members in the structs in the list. eg:list(0).a = 5 'Does not workIs there some way to get around this without declaring an instance of that structure, like this:dim str as StructA = list(0)str.a = 5I'd
View 2 RepliesDeep Copy - Is Object Returned By Reference From Function ?
Aug 5, 2011If I instantiate an object within a function in VB.NET and return it, does it return it be reference or by value. IE - should I be worried about performance if I write something like this:
Public Function ret_obj_func() As big_object
Dim ret_obj As New big_obj(<lots of stuff>)
Return ret_obj
End Function
If I call this function from somewhere else, will it instantiate the object in the ret_obj and then create a deep copy to pass back a copy to the caller, Or will it just pass back a reference?
ICloneable - Make A Deep Copy By Adding A Clone Property To Class?
Feb 6, 2012I am trying to make a deep copy by adding a clone property to my class.
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C# - Deep Copy System.Windows.Forms.WebBrowser Object/Restore State?
Apr 27, 2009Essentially what I want to do is copy a WebBrowser object such that I can do the equivalent of "Open In New Tab" or "Open In New Window" actions, maintaining any posted data. I don't just want to navigate to the same URL as in the original WebBrowser object, rather I want to repeat the HttpWebRequest.
View 1 RepliesDeep Clone Of Object With Base Class System.Windows.Forms.Control
Apr 18, 2012I have an object (a third component gridview) which is serializable, and I need a deep clone of this object. I have the following code which throws the exception."The type System.Windows.Forms.Control in assembly System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKey Token=b77a5c5 61934e089 is not serializable".So the gridview's base class is System.Windows.Forms.Control, which is not serializable. How can I get a deep clone from the gridview? [code]
View 5 RepliesCopy To The Clipboard Using CNTRL/C On A Menustrip - Copying Text From One Control To Another Control On A MDI Child Form?
Aug 19, 2009I am still messing around with Cntrl/Copy and Paste from a menustrip. Paste is working fine. The copy is working to a certain extent. It will copy the complete text field from one control to another. how do I determine what is the selected text only. My code below:
Private Sub CopyToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles CopyToolStripMenuItem.Click
Dim activeChild As Form = Me.ActiveMdiChild ' Determine the active child form.
Dim activeControl As Control = activeChild.ActiveControl
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Display Which For Example Is 300 LEDs Wide By 300 LED's Deep?
Sep 23, 2009I am after some GDI+ help, Basically I have an LED display which for example is 300 LEDs wide by 300 LED's deep, so you could say it has a resolution of 300x300.I am intending to use windows to process images ready to be sent to the display (as the display is dumb and simply displays what it is sent, But I require that the images are animated as well as static sort of like the basic PowerPoint animations (scroll on/off etc).to achieve this I need to write some code that creates frames much like gif's. So to scroll a 300x300 image onto the display I would need 300 separate frames.
So I have written the following code that uses the GDI+ objects to build the frames needed to scroll an image from the right or left.
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Fill A TreeView, 25 Levels Deep?
Jan 12, 2010I'm looking for a recursive subroutine.I have the dataset from sql-server with in the datasource-table a parent- and a child-column.
I made a routine to put the parent-nodes in the tree.The problem starts with the childs over so many levels.I can write it out but it is to much code, I'm sure it can be done more efficient with a recursive subroutine.
.tv_Ana.Nodes(A).Nodes(B).Nodes(C).Nodes(D).Nodes(E).Nodes(F).Nodes(G).Nodes(H).Nodes.Add(Trim(sLev_nI + "-" + row_nI("MidCod").ToString()))
The tree will be about 25 levels deep.A few days ago I saw a recursive subroutine to fill the childnodes without the above difficulty to write alle the levels in code.That example I cannot find it any more, but it had a line of code more or less like this here below:
Dim
Nodes As TreeNodeCollection = tv.Nodes(A).Nodes
but it doesn't work yet!
Shallow Vs Deep Copies Of Objects
Oct 19, 2010Shallow vs. Deep copies of objects. Why would anyone want a shallow copy of, say, a multidimensional array?! If I wanted something to act just like something else (and this is what shallow copies do), why would I create a second instance to do what the 1st instance does already? I think I understand the point of objects and that just copying the contents of one object to another does not make them independent, but it seems that the whole point of doing:
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VS 2008 - List All Sub Directories Names But Only 1 Level Deep?
Mar 13, 2010I have a button ad a list box, the button when clicked lets the user select a directory on the HDD, and then the app is meant to list all the sub directory's of that folder int he list box. However I cant seem to get it to list just the sub directory names, not the full paths, and also to only scan by 1 folder deep (selected foldersub folder).
View 1 RepliesHow To Attach Events Of Original Object To Deep Copied Clone
Oct 27, 2010Following up on my question yesterday to deepcopy an object with events in C# and attach the events of the original object to the Cloned copy is pretty easy, you just set the Event declaration in the Copy = the value in the original. Deep Clone when events are attached. How do you do this in VB.Net? (Using .Net 2). Maybe there was something with reflection where you can examine what events are bound and somehow transfer those to the new object.
View 1 RepliesCopy Control, Paste As An Image?
Apr 21, 2011In my program I have a custom control that is a combination of a datagrid, labels and images.
My customer wants to be able to select the entire control, then copy it and paste it in another document as an image.
Copy Text To A Textbox Control?
Dec 4, 2009I am working in vb2008. I have a series of textboxes on a form that I am using for my application. I cut and paste information into one of my textboxes as a description for the record. Most times the information is simple text but sometimes the text I am pasting is formated with carriage returns and special characters. I need my data to always go into this textbox unformatted.
View 1 RepliesCreate A New Instance Of A Control To Copy It?
Jan 27, 2010I am trying to create an instance of a control to copy it.
Dim NewPanel As New Panel1
Is not working. When you create an instance like this, the "Panel1" wont show up in the list of classes, so it says "Panel1 is not defined".I have heard of control arrays dissappeared in VB2008,but still,is there any way to create a new instance / copy an already existing control or let a control appear like it was when you made it in VB so you can open multiple Panels like they are child forms?
EDIT: I know you can do:
Dim newPanel As New Panel
newPanel = Panel1
Form1.Controls.Add(newPanel)
..but that's not what I want, because that makes you can't edit the controls inside the new panel.
Cut Copy Paste User Control
May 14, 2012i have a richtextbox in a user control my user control is loaded into a program with a menu strip..when a user tries to copy and paste into my RTB the key commands do no get to me because they are grabbed by the parent application..is there a simple way when the RTB gets focus to make sure it recieves the ctrl+C command?
View 2 RepliesTake A Snapshot, Or A Copy Of A Control, For A Bitmap?
Dec 13, 2010I am trying to take a snapshot, or a copy of a control, for a bitmap. I'm wanting to do this to a listbox, but part of the listbox may be hidden.On the mouse_down event I need to get the snapshot of the whole listbox (even though parts may be hidden behind other controls, I need the whole listbox) and draw it to the screen in the same location as the original listbox (but the hidden parts still stay hidden behind the other controls on the bitmap).
On the mouse_move event I need to move the snapshot up/down based on mouse movement. This also moves the listbox up/down and this code is done. I will just move the snapshot of the listbox the same way as the original listbox.On the mouse_up event, I will dispose the bitmap and display the original listbox again.
I am doing this because moving a listbox up/down is really messy. It's a custom drawn listbox and looks horrible moving, so I figured if I could snapshot it, move the bitmap while visible, and listbox behind the scenes, it will flow smoothly and no one would notice I am scrolling a bitmap instead.
Double buffering the form and listbox didn't help . I've done some graphics.drawstring before, but not much on other graphics.
Clone / Copy A Control (with Child Controls) Using Asp.net?
May 28, 2012I have a bunch of dynamically created controls by the user which I'm storing as a control collection in the session state so I can display them on every postback. Each control that the user generates is a div with other controls inside it. I have a button on each control that will allow the user to either delete the control or duplicate it.
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Copy A Control On A Form But Past Border?
Aug 8, 2010Is it possible to copy a control that is on the form but also runs off th the form because it is bigger than the form and screen? If I have the height and width of an area I want to copy that runs off the form, any way to grab it? The form will not be minimized and will be the focused program. When i click a button I want to do this. Either copy to clipboard or even just save as an image. I can even have the handle to the control if that is needed.
View 1 RepliesDragDrop Control - Fails To Copy Files?
Mar 10, 2009I am new to vb.net and development in general. The basics are I have a control that accepts dragdrop, I use this control to drag files onto - based upon the text contained in a combobox the directory path is built in the dragdrop event, and I initiate System.IO.File.Copy. I then refresh my listview, which is working well and is listing files based upon the content of a directory. Here is my code for the dragenter and dragdrop subs
Private Sub pnlDataDrop_DragEnter(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles pnlDataDrop.DragEnter
If e.Data.GetDataPresent(DataFormats.FileDrop) Then
e.Effect = DragDropEffects.Copy
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I have added some break points so that I can see the values for targetpath and myfiles(), and all looks ok. The app is in its very early stages, so I am only testing in the development environment at the moment. So you know, the targetpath is a UNC: \myservermydirectory.
Forms :: Copy A Control And Place It In Another Location?
Sep 10, 2011Does anyone know how to copy a control (button, panel etc...) and place the control with the same click event on another part of a form while keeping the original in the same location? I have a custom user control that I created that has special features on click. If I have the control on the left side and want to drag it over to the right side I want the control duplicated, as this control can be duplicated unlimited times, and still have the same click event.
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Get Selected Text Within Webbrowser Control And Copy It?
Aug 27, 2011OK this is a novel problem however it has been annoying me for hoursLets say some dude is on my webbrowser and needs to go to a url which is just text on the pageI would like to get the code that sees this selected text on the page and then copies it...
CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).document.ActiveElement.InnerText.ToString
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VS 2008 - How To Copy And Paste Or Export Content Of Listview And Label Control
Feb 17, 2011I was just wandering if we could possibly export the contents of the listview control that we can select in the visual basic 2008 application. I tried to set its properties to 'true' on FullRowSelect, HoverSelection and the MultiSelect. I want to copy and paste the content of the listvew control when being highlighted. It highlights all the items inside the listview control and when you use the command ctrl+c for copy and paste it in another application like MS Excel, it only paste one item which is the first item in the row and the rest were not.
However, in the datagridview, it ables to paste all the contents inside of the control but the listview control can't. Why is it so? do i need to add codes on it or it is just the Windows OS
is not capable of doing it? How do I copy the selected items from the listview control and paste it into another application? Same as the label control which I want to highlight or select the text of the label in order for me to paste into the other application but unable to do so. These are the two controls that I'm trying to find out on how to export their contents to another windows application.
Filling Listbox From Folders But Limit It 2 Folders Deep
Mar 13, 2010I use the code below to fill the list box and it works great. But i need it to only look in the \Software and \Software\FolderName Foldername could be any folder in the Software folder i need it to get all the .exe from software folder and only one more folder deep no more.
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Possible To Copy An Edit Control (win32) From External Program To Use On Own Program?
Jan 9, 2010I need to manipulate an external edit control from with in my program. (IE: Get new text whenver it's being enter into edit control and parse the infomation in my program).So, is it possible to create an edit control in my program that base on the handle of an existing application using win32 api or something
View 4 RepliesVS 2005 Crystal Report Viewer - Unable To Right Click->Copy Or Ctrl+c And Copy Any Text
Dec 28, 2009I got a problem...after load crystal report viewer, I am unable to right click->Copy or ctrl+c and copy any text. I am using vb.net 2005, crystal Report 11...I am showing the report content on the Report Viewer..
View 4 RepliesCopy From Projects Saved In Documents To Copy To The Removable Disk
Apr 3, 2011i am mukesh i want a form were i have a button now i want to copy what ever i still now changes made in a vb.net from to be stored inside the pendrive just by clicking on the button does it possible i have done a project which is a shops project now my client wants to do that project when he is in shop he will use it in laptop but when he moves to some other location he wants to carry that project in a pendrive since he is not so much educated o he needs only one key which he must press to copy the database from my source my documents to the pendrive does it possible
View 1 Replies.net - System.IO.File.Copy Doesn't Copy?
May 27, 2011I have a weird behavior when trying to copy a file with System.IO.File.Copy. The file never gets copied. More than that, the call doesn't generate an exeption!
I am using VB.NET, Framework 3.5. I'm trying to copy in C:Temp and I do have the privileges. Or at least I used to...