.net - Save A Copy Of An Object And Restore It Later
May 12, 2012
I have a form which has a ListView and buttons to add/edit/delete items from this list. It has a save & a cancel button. On pressing the cancel button, I want to revert all the changes that have been done in the current form. So, while loading the form I keep a copy of the original list like below.
backupMyListView = MyListView
In the cancel button code, I do the opposite.
MyListView = refMyListView
Whats happening is that, the original listview is never restored because everytime MyListView was updated, backupMyListView also was getting updated.
How do I restore the original ListView on pressing the cancel button?
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Apr 27, 2009
Essentially 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.
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May 23, 2010
I have an application that has a part of it that modifies several windows services. When the form loads it checks the registry for the current status of the services.
What I would like to do is have it so that the application takes a snapshot of all the defined services when it is first installed and stores the defined settings for each of them. This way the services can be restored at a later time to there original settines. I would also like to make it so that a custom settings file can be created so that this custom configuration could be loaded which contains changes. The result would be the first file made would allow everything to be reset prior to any changes the second file would contain all the setting changes.
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Mar 8, 2012
Im having some trouble saving and restoring a TrackBars value to my settings.First of all, this trackbar is controlling a WMP components volume.. That works fine, no problems here, i can control the volume with no problems with this
Private Sub TrackBar1_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TrackBar1.Scroll Volume.Text = TrackBar1.Value Form1.RadioPlayer.settings.volume = TrackBar1.Value
End Sub
What i want to be able to is for the application to save the value the Trackbar has been set to, when the application closes and the restore that value when it is launched again. And for this i use Application Settings.
[Code]...
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Jun 15, 2011
I have a utiility that users can re-order DataGridView Columns in to their hearts content. I want them to be able to create a named list so they can have multiple Column Patterns to choose from.When I restore though the re-ordered Columns are not where I saved them.
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Jul 7, 2010
I have a complex form to allow the user to configure my app.
What's the best way to save the form state & reload when the program next runs.
I mean text he has entered in list boxes, the selected item of combo/list/radio, whether a checkbox is cheeked, etc
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Dec 28, 2011
I have developed an application on my phone to manage my money. I would like to create an application on my pc to get the local database from my winphone to be able to display informations... and have a backup. I would also like to be able to restore my data back to my winphone if there is a crash.
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Jun 17, 2010
[url]..I'm trying to use the Restore.Abort function during an SMO restore process - What would be the best method?
[code]...
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Feb 1, 2012
In VB.net, when I retrieve a value from a list do I get a copy of that value or a reference to it?
dim blah as someObject
dim listOfBlahs as list(of someObject)
listOfBlah.add(new someObject(1))
[Code]....
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Jun 15, 2010
Okay, so I'm using this code to save a webpage to a file:
Dim myWebClient As New System.Net.WebClient
myWebClient.DownloadFile(mainbrowser.url.tostring, _
"C:/currentpage.html")
[code].....
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Feb 4, 2011
.net 3.5, VS 2010... this is for an asp.net website.I have an class called Agency. there is a second class called Agency_Queries. Agency_Queries inhertis the Agency class. I'm trying to create a function that will copy the like properties in Agency to Agency_Queries. I figured out how to do that.. but when i try to make it more generic so that i can pass in my class name and lists i'm doing something wrong.So if there is an list(of Agency) that needs to be copied to list(of Agency_Queries) i've got something like the following.
Dim AgencyS As List(Of Agency) = Nothing
Dim Oc As New Agency_Controller
AgencyS = Oc.GetAgencyData(0)
[code]....
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May 23, 2010
I have an class called Agency. there is a second class called Agency_Queries.Agency_Queries inhertis the Agency class. I'm trying to create a function that will copy the like properties in Agency to Agency_Queries. I figured out how to do that.. but when i try to make it more generic so that i can pass in my class name and lists i'm doing something wrong.
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Jul 10, 2004
How can I copy an object? When I use obj1 = oby2 I copy only the pointer. I know some objects have the methode .clone. But What's about the other ones? Some objects (for example a button) I can copy of course by creating a new object and set each property. (btn1.Left = btn2.Left) But that works rarly. And of course what's about my own classes? Is there now change to copy them like you can do it for example in C++...?
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Oct 19, 2011
I want to copy the txt file from one location to another location.
textbox1.text = Source file directory
textbox2.text = destination file directory
For Example
textbox1.text = "C:1.txt"
textbox2.text = "d:"
I want to copy 1.txt to d drive.
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Jul 29, 2010
I am building an ASP.NET application that needs dynamic tables. That's another issue that I've already posted about (and gotten a pretty good response!). Now, I'm running into another issue - I want to add new rows to my table, but given that I will have 10-12 tables on one page, each containing different objects in their rows (text boxes, check boxes, etc.) I need a way of simply generically adding a new row that has the same objects as the first row in the table. Here's my code:
Private Sub AddTableRow(ByRef originalTable As System.Web.UI.WebControls.Table)
Dim originalRow As System.Web.UI.WebControls.TableRow = originalTable.Rows(1)
Dim insertingRow As New System.Web.UI.WebControls.TableRow[code]......
Stepping through with a debugger, I see that this strategy is working - but the additional table row still doesn't appear...and still does when I do this statically.
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Feb 27, 2009
I am trying to copy the contents of one graphics object to another, but the only was I have been able to find is based on using GDI32.DLL, which i would rather avoid using if possible.Does anyone know how/if this is possible using managed code? I don't mind if answers are in C# or VB.Net.
[Code]...
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Apr 27, 2011
Im about practicing vb .net, manipulated different controls, im trying to createapplication like PAINT, Heres my problem at this point what controls should i choose? then i like to copy-paste-save the image to sql server, or save as jpg or bitmap, i have some syntax from vb classic but it didnt work, pls. help me with this kind of situation,
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Jan 4, 2010
I need some help on having everything I copy display in a textbox.
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Mar 24, 2009
In Access or Excel, for instance, if I have a file named MyFile I can create an entirely new copy of it by going to File --Save As--; and pronto I have another File named ,say, MyFile2 while retaining my original file - MyFile - in its entirety.My question is: can I do same in VB? If I have a Solution named, MySolution, can I use the Save As dialog to create an entirely new copy of it while retaining the original Solution? If yes, how and if no, how do I do it?
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Mar 27, 2009
i have a user define object which i'm initializing with data from external datafiles.... the purpose of this object is to reduce the amount of disk/data access and processing required every time i need to add an instance of this object to a collection.so, whenever i add a copy of this object to a collection, i would simply reference the "base" object, and avoid having to process all the data and perform the conversion and so on...the issue is when i add the object
Collection.add(Base_Object, Key)
the collection ITEM is a Reference to the base object and not a copy.
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Jan 8, 2009
Is there any method or a way to copy a form object to a variable? Let me explain this - We have a method called "Copy" for the Dataset class & you all must be knowing that there is a difference between the below two lines of code: DsTemp = Ds DsTemp = Ds.Copy()
In the first line of code, any changes made to Ds will reflect in DsTemp. However, in the second line of code, any changes made to Ds will not reflect in DsTemp because we are only "copying" the contents & schema of Ds. Likewise is there a method or a work around to "copy" a Form object?
[Code]...
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Jul 29, 2010
Rather than giving the very specific case (which I did earlier), let me give a general example. Let's say that I have a function, called callingFunction. It has one parameter, called parameter. Parameter is of an unknown type. Let us then say that I wish to copy this parameter, and return it as a new object. For example, in pseudo code, something along the lines of...
[Code]...
EDIT: Additional Information The first time I posted this question, I received only one response - I felt that perhaps I made the question too specific. I guess I will explain more, I have an ASP page with 10 tables on it. I am trying, using the VB code behind, to come up with a single solution to add new rows to any table. When the user clicks a button, a generic "add row" function should be called.
The difficulty lies in the fact that I have no guarantee of the contents of any table. A new row will have the same contents as the row above it, but given that there are 10 tables, 1 row could contain any number of objects - text boxes, check boxes, etc. So I want to create a generic object, make it of the same type as the row above it, then add it to a new cell, then to a new row, then to the table.
[Code]...
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Jan 26, 2010
I have a Class called People.I have an object called Roger, another called Sally.How can I copy my 'Roger' object over top of 'Sally' so they are identical?
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Sep 3, 2006
is there a way to copy selected text out of a WebBrowser object? I tried:
Webbrowser.Select()
Clipboard.SetDataObject(Webbrowser)
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Mar 12, 2010
I would like to make a "deep copy" of a class object that I have defined. See Visual Basic 2005 Code below
Dim MyStuff1 as new MyClass
Dim MyStuff2 as new MyClass
mystuff1.getbyID(anID)
mystuff2 = mystuff1
Unfortunately the statement "mystuff2 = mystuff1" makes a "shallow copy" of mystuff1. Therefore, if mystuff1 is redefined then so is mystuff2. What do I have to do in MyClass to implement a deep copy method such that operations on mystuff1 and mystuff2 are independent?I would prefer something like
mystuff1.deepcopy(mystuff2)
or
mystuff2 = mystuff1.deepcopy()
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Mar 15, 2010
I have 2 save buttons on my form, 1 which saves all textbox contents to a .txt file, and 1 which saves a image capture of the active window to a jpg. Both work fine, on the same form i have 2 picture boxes which the images are loaded into based of a list box like so:
[Code]...
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Sep 3, 2011
I'd like to draw an image (like a bar code) pixel-by-pixel in a Visual Basic .NET WPF Application and ...
show the image in my UI
copy it to the clipboard
save it as a .BMP-File.
It should also be possible to add Paint-like editing features later.What is a good approach? System.Drawing.Bitmap works internally, but the only way I could show it is to convert it to an ImageSource and show it inside an Image control. Is there any better way?
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Aug 5, 2011
If 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?
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Feb 16, 2012
I am running an application from my desktop as you see on the picture,and I don't know how to run File Save command on active form without mouse click,only with vb.application?
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Oct 16, 2011
I picked vb.net for this question since it's the only prgramming language I am fairly familair with, but if C++ or something else is more suited for this, I am willing to learn something new.What I am trying to do is:Retrieve text from database (this already works in vb.net) and copy it to clipboard Switch primary screen to the external application I want to work with (example: word or open office) Emulate key-press "Enter" Paste text and hit enter again Emulate key-press CTRL and then emulate a click on a pre-defined spot on the screen (like 500pixels from left, 740pixels from top). Save screenshot, using a second value from the database as the filename (the naming part should be easy) Emulate another click on another pre-defined spot Repeat for next text in database.I wouldn't know where to start, though. I guess the most important part of what I'm trying to achieve is; switching focus to an external application and emulate keypresses and mouse clicks on it.
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