Serialization Save / Load And Project Updates
Oct 22, 2009
I have just learned about serialization, and looks very appealing as a way to save application data without much maintenance overhead.But I have one issue that I would like answered before I start coding.If a user saves a project via serialization, and then the program gets an update, say one that might have added or removed a property for an object.If the user then tries to load his previous project with the updated program, since the object now has a modified structure won't it fail to load from the previously serialized data?Would there be any way to recover/convert that saved data to the current object structure?
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Nov 11, 2009
From a TreeView, I get this XML serialized:
<?xml version="1.0" encoding="utf-16"?>
<node text="<span id='c6f5ab9e-d08f-448a-9143-02d174317c07' oncontextmenu="
SetContextMenu(this.id, event);return false;"
>Zürich</span>" value="c6f5ab9e-d08f-448a-9143-02d174317c07" navigateurl="" populateondemand="False" showcheckbox="false" checked="False" expanded="True" selected="False">
[Code] .....
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Jun 11, 2012
This is newbie VB question. My son is learning VB and I am learning with him. We have RichEdit control application (non WPF), where we input text, formatting its Style (bold, italic, underline, etc.). Our next task is to save the text together with its attributes into the file. The question is: what type of serialization is preferred at this case?
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Oct 5, 2010
I have used the XML serialization to save a single text and a picture in a XML file.However, I am confused on how to extend the concept further.I have a second Windows Form which has a TableLayoutPanel in which each cell has a Picture Box and a TextBox. The user has the option to set the number of rows and columns himself, so I do not know about the number of pictures that have to be saved in the XML file. Further, when the user pressed the load button, the same pictures have to come back to their original pictures boxes in the TableLayout.
How can I save the contents of the TableLayout in the XML file and retrieve them in their corresponding cells?
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Jun 10, 2010
I am writing a text editor program and I have written the new, open, save as, exit menu items but I am struggling with writing the save option.Now I have created the menu itself (well vb did, I just used insert standard items) but how do I code up the save menu option so that it updates the current document or if the documnt has not yet been saved bring up the save file dialog.Here is the code I have so far
Public Class Main
Private Sub NewToolStripButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NewToolStripButton.Click, NewToolStripMenuItem.Click[code]....
I know I have some finishing touches such as messages and error handling and stuff but at the moment I want to get all the basics working,I think the save menu option is all I am struggling with at the moment.
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Feb 25, 2011
I have a little prob guys. How can we set vb.net setup project will check for an update of its newer version first before proceeding in installation.
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Jun 17, 2010
1.) I dragged my detail view over to the form window to create a bindingnavigator, fields, etc.When I press save on the form, the database is temporairly saved.However, if I save my visual basic project, I lose all the changes I have made to my database.Is there a specific save command that updates the access file permanently?The default command added by dragging over the dataset does not work.
2. My database is accessed with the following string:[code]However, doesn't this mean that the database MUST be placed in that specific folder on any PC? Is there a way to simply build the database into the compile so the program automatically generates the database when installed on anyones computer?
3.) This might be fixed by fixing the previous two issues, but if I compile my program and try to install it, I get an error message "Could not download the application.The application is missing required files."
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Dec 14, 2009
I have an existing xml document with music playlist information, which is read into a GridView control in Visual Basic. I am now wanting to save any updates in the GridView to that xml document.[code]...
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Jun 7, 2012
I am trying to understand how the binding navigator buttons are actually working.
I started by creating a table called "Students" in MS Access,
I then "dragged and dropped" that table onto my VB form after importing the data connection.
When I debug, I click the add new (the yellow plus "+") then I type info into my fields (700_Number, First_Name, MI, Last_Name). (700_Number=Primary Key)
After I am finished typing into the four text boxes, I click save. If I end my program then start the debugger again, the record is still there...it goes away only if I change some of the code anywhere in my program.
Also, I am trying to use the record I just put into my database for another part of my program. I use this line of code:
MsgBox(frmAddStudent.DrByrdsTaskListAppDBDataSet.Tables("Students").Rows(0))
This is just to see if what I am trying to put into my database is actually making it there. Every time I run, this message box turns up blank.
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Sep 17, 2009
I've been using XML serialization for a while, and today I realized something really odd. If I have a new line right after a "dot" (.), when i deserialize, I lose the dot. Has anyone ever had this happen to them? The following is my serialization code:
[Code]...
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May 28, 2010
Has anyone else had issues with Visual Basic 2010?My visual basic program has been running fine for months but recently every time I try and load a project (any project) the program freezes, then I have to close it down and reload, every time I load Visual basic for the second time I get the following error:
HTML
An error was encountered while opening associated documents the last time this solution was loaded. Document load is being skipped during this solution load in order to avoid that error.Plus when trying to run a project in debug it takes ages to load (around 5 minutes) this has only started happening recently, projects were loading in seconds.
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Nov 27, 2009
Can I save an array into my .bin file then read the array again just like a string or Integer??
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Nov 22, 2011
When I go to create a new project in VB I only get Name in lower pane to enter a name. I do not get Location or the 1 under Location. How do I get those 2 to display
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Nov 24, 2011
I have two experimental web services. One is an asmx contained within a .net web application. The other is a WCF service library being invoked from the web application.The asmx basically does everything I need, but I think WCF would be better, except that it doesn't do anything as I would expect after fiddling with the asmx service.For example, the same method behaves differently in each:
' ASMX
<WebMethod(BufferResponse:=True, EnableSession:=False)>
Function Test(aObject as Object) as Object
' object will have been successfully serializaed into a dictionary
[code]...
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Oct 7, 2009
Its a League Organizer, basicly ive started it off with 16 teams and end up with 1(winner) 16 box's on the far left, then 8, then 4, then 2, then 1. the 16 box's have "Team 1" "Team 2" etc... ive put a new/clear/open/save button in that order.
BUT this is my problem..when i save(Save Button) the text file saves all the text wrong it ends up like this...Team 1Team 2Team 3Team 4 Etc...
But i want it to save like this
Team 1
Team 2
Team 3
Team 4
Etc...
The code is...
Dim Save As New SaveFileDialog
Save.Filter = "Text Files (*.txt)|*.txt|ALL FILES (*.*)|*.*"
[CODE]...
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May 25, 2011
So I have a form with a textbox and an openfiledialog. I have it so it saves the text in the TB to a file along with the file link in the OFD. Here is what the project file looks like:
[Code]...
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Aug 19, 2011
I think I have accidentally changed something in the properties of a form, but I am receiving this error now, and none of the 4 forms will load.
System.InvalidOperationException was unhandled
Message="An error occurred creating the form. See Exception.InnerException for details. The error is: InvalidArgument=Value of '52' is not valid for 'index'.\r\nParameter name: index"
Source="WindowsApplication1"
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May 19, 2009
I'm trying to load a project that I lazily saved all for. When I try to load the project from the vb start menu it says I can't load it because it has a reference to a file.
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Aug 5, 2010
My vb.net app ORDER is at d:myapporder. I created a setup project named it as ordersetup in the same solution file. Once I moved ORDER to e:myapporder, ordersetup can not load any more. How to fix it?
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Jan 2, 2011
Error while trying to run project could not load file or assembly 'windowapplication1' or one of it's dependencies.the module was expected to contain an assembly manifest
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Sep 9, 2009
I installed VB 2008 Express on my laptop. I have Net. Framework 3.5, and whenever I try to run ANYTHING. I get the following error: "Error while trying to run project: Could not load file or assembly 'Windows Application1' or one of its dependencies. The module was expected to contain an assembly manifest." I've tried renaming the project, the rootname, and I've reinstalled it like 9 times. Any ideas?
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Nov 22, 2011
I upgraded vb6 project to vb.net. Conversion of 3 user controls from vb6 to vb.net have done. Some converted code contains code like:
VB6.TwipsToPixelsY(LedHeight)
MyBase.Width = VB6.TwipsToPixelsX(VB6.PixelsToTwipsX(LedCol(0).Width) + 15)
The converted project takes too much time to load than previous vb6 project. What manual changes to the code should be done or is there any other option. Is it due to vb6 to vb.net conversion.
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Nov 9, 2010
DataGridView i will like for DataGridView to Save when i close my application and i will also like to Load when i open my application.
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Aug 4, 2011
how can i save load a listbox? [code]
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Jan 26, 2009
I wanna save and load my color selected by ColorPicker like this[code]...
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Mar 16, 2010
I have been playing around with Visual Basic for about a week now. I created a program that I use at work basically just to organize my day.
The program consists of buttons that link to programs and spreadsheets that I use often, as well as a checklist of tasks I've completed and text boxes that I use for reminders. Other buttons affect GroupBox texts and Label texts.
What I'd like to know is how I can implement a Save and Load button? I'd the current state of the program to be saved so it can be loaded in the event that I have to shut the program down. (Check boxes checked, Text in Text boxes, Labels, etc...)
I've been looking online for HOURS and I've messed around with the SaveSettings feature... nothing seems to work.
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May 6, 2010
I have a treeview control that contains an Active Directory OU structure and I want to save this to an XML file, and load it again later.
When I save an OU that has a space in the name, I get an "XMLException was unhandled" error. The description is "The ' ' character, hexadecimal value 0x20, cannot be included in a name.".[code]...
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May 23, 2012
I was wondering what is the easiest way to save and load data through different forms in vb. I just want to save 3 textbox.text that a user saves and be able to load it on a different form.
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Nov 13, 2009
I'm building a web browser But im haveing an issue saving the Bookmarks and reopening the book marks
and also reopening the url when its clicked
i have a multi-colum listview
with 2 Coulums "Name" And "URL"
i want to save it on from close to a XML file and then reload them on form open but i dont know how to do it
also i want to set it so when you double click the site name it opens the URL
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Feb 4, 2011
It's a game that continues for a long time and isn't done in a hour, so it is pretty annoying that if the player re-opens the game he has to do everything over again. So, does anybody know how I can make a save/load system? Like that on the first form of the game there is a "Save" and "Load" button. If the player presses the "Save" button, the program automatically saves the progress of the player in a file somewhere on the harddisk of the player, and if the player presses "Load", the program automatically loads the file he saved, so the player doesn't have to start all over again.
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