Serialize The Data And Save It To Xml File?
Feb 26, 2011
I have a list with class user and I am able to serialize the data and save it to an xml file. However I just cannot figure out how I
can deserialize that .xml file and save the data into a new list.
The following is my code:
Dim Users As New List(Of User)
Dim objStreamWriter As New StreamWriter(filelocation)
For Each btn As Button In myNodeBtns
[Code]....
I want to read the data back from the file and save it into the mynodebtns list where I orginally took it from.
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Feb 9, 2010
I have searched for an answer for a long time now, both generally ont he web and in several forums including this one. There are many people who asks this or similar qusetions, but the answers are often hard to understand, and quite often are answers to something other than what was asked from the beginning.I know that there are many skilled programmers out there, but most are not great teachers. So here is what I need: I have constructed a program in which the user can write values in textboxes, choose from lists (comboboxes) and make some choices by checking checkboxes. The data in the lists comes from a database, but I don't think that is really relevant here. What I want is, when all the choices are made and when the textboxes, comboboxes and so on have data (text or numbers) in them, I want the user to be able to save this to a file (XML perhaps?).
To speak plainly and visualize this to you, think of a roleplaying game (RPG), and that you fill out a character form with details about your character. Of course you want to save all this, and at some point retrieve it to make changes when you level up. I am not all that stupid when it comes to programming, but I have never tried to do something like this. My applications have had a database engin behind the GUI, and all the saving was done in tables at the far end of everything. Now I want to save data to a file instead. I have tried to find books (or a good tutorial here on the web), but most answers are for C (++. #, etc), or else they are hard to understand.
Is there anyone here who can help me or point me in the right direction? I'm not asking you to do my work for me, but som examples that are valid and that will help me understand the process whould be nice. So far I have recieved good help here on this forum from nice people.
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May 13, 2010
when an exception occures, I want to save the data available on the stack and log it. how can I serialize all the available local variables and save them?
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Aug 17, 2010
If a class is serialized and has events fired from it that are handled on a form you get the error "Form1 cannot be serialized" in c# you can use (to work around this):
[Code]....
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Dec 10, 2011
I have a form with a listbox that when the form is opened I need it to display info from a file. I don't know what would be easier to work with Excel or a txt file, but it is in this format:
Phillip Frank
3/19/1990
3
999-555-8618[code].......
I would like it to populate the list box when the form is loaded, but if I have to use a button to tell it to load that is fine also.On the same form I have 4 textboxes that ask for each of the above items (name, DOB, Level, PH#) and a button that when pushed I want it to save it to the same file where the above info was pulled from in the same format.The Show Contacts button doesn't have to be used if it is not needed.
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Apr 19, 2012
I'm trying to serialize a data table in vb.net:
Dim dt As New System.Data.DataTable
and for the serializer:
Dim js As JavaScriptSerializer = New JavaScriptSerializer()
dim jsonString as string
jsonString=js.serialize(dt)
when it serialize the data table on the last line,it got an error:
An unhandled exception of type 'System.InvalidOperationException' occurred in System.Web.Extensions.dll Additional information: A circular reference was detected while serializing an object of type 'System.Globalization.CultureInfo'I even make the simplest datatable with only 1 column and 1 row, but it just won't serialize it?
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Jun 11, 2009
I'm trying to serialize/deserialize data in vb. I've made a .dat file from a blank plain text file (not sure if this is suitable) which seems to connect ok, as do both the classes. Here's the
Imports Microsoft.VisualBasic.ControlChars
Imports System.IO
Imports System.Runtime.Serialization.Formatters.Binary
[Code]....
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Jun 1, 2009
I've got a web app that sends a request to a WCF service. The WCF service gets a LINQ resultset (anon. ilist) and sends that in reply, back to the web app.In order to get it working quickly, inside the WCF app, i'm using copytodatatable and sending it to my web app in a DataSet.
My web app then takes the DataSet and writes it to xml, some xslt is performed and the resulting data is shown on screen. Perfect.
I'm still (relatively) new to WCF. I understand that sending DataTables/DataSets is a bit cumbersome. The web app wants the data in xml format (for the xslt operation), so I figured I'd get the WCF web service to do the DataTable -> xml work for me, and simply reply with a nice XmlDocument to the client webapp.However a XmlDocument cannot be serialized.
What's the best way of sending the XML data down to the client over wcf?
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Apr 29, 2012
I need to save a datatable to a binary file , in binary format , in order to make the process fast because the datatable may contain up ten millions rows. So , XML is not favorable because it makes the file large sized , and the process will be slow.
I managed to save the datatable to a binary file , and it works fine , but the problem when I try to add new rows to the existing binary file (using a datatable with the same schema , but different rows data) , it copies the schema of the datatable to the binary file, making it very large.
[Code]...
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Jan 15, 2010
I'm trying to serialize a data structure and pass it to another report via parameter, and this line of code:
Dim s As New System.Xml.Serialization.XmlSerializer(GetType(System.Collections.HashTable))
Produces this error:
An error occurred during local report processing. The definition of the report '/myReport' is invalid. There is an error on line 22 of custom code: [BC30002] Type 'System.Xml.Serialization.XmlSerializer' is not defined.
How can I get around this? I have been able to use fully defined .NET classes in other lines of code, including the following:
Dim outStream As New System.IO.StringWriter()
and
Private colorMapping As New System.Collections.Hashtable()
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Dec 14, 2010
I am new to using visual basic 2005. I have a tutorial book and I have followed it but it does not help me understand. I have a limited understanding of the net framework and the drag and drop features.
What I want to know is this: How do I make a simple name and address tracker file that I can enter data and save it as a file. The book does not cover this proceedure but It is what I want to do.
IE: Start VB2005 start new windows app. Name (whatever) drag 2 label's and 2 textbox's and one button for saving data entry. I want this program to enter name in textbox1 (press enter) then enter address in textbox2 (press enter) then save file (whatever name) when you click the button.
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Apr 1, 2009
[VB 2008 express edition] i am doing a application data grid view bound data from MS access (.mdb) as my dataset. the dataset have 5 tables, each table consist of ID, Items, Rates, And Amount, i face some problem here:
a) cannot delete row from the table, (using binding navigator but error)
b) how can make a opendialog to load the .mdb file dataset table in to the datagridview?
c) how do i save table in the datagridview into the MS Access file ?
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Jul 20, 2011
I want to Serialize and Deserialize a configuration class containing a Dictionary to a XML file.Here is an exemple of what the class look like.
Imports
Public
Class
[code]....
When I try to serialize it with a XmlSerializer I get an exception saying to me that it is impossible to serialise Configuration.Parametres because it implements IDictionary.
DateTime
)
Configuration
System.Collections.Generic
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Jun 5, 2010
i made an assembly that contains a class DownloadJob / I load the assembly into another project (the download manager) and i am trying to serialize the downloadjob into a XML file as such:
Public Sub Save()
Dim objStreamWriter As New IO.StreamWriter("C:Product.xml")
Dim x As New System.Xml.Serialization.XmlSerializer(Me.GetType)
x.Serialize(objStreamWriter, Me)
objStreamWriter.Close()
End Sub
I put the save function in the assembly in the class downloadjob itself so ME refers to the DownloadJob class object that i want to serialize I get this huge exception:
The assembly with display name 'Download Client.XmlSerializers' failed to load in the 'LoadFrom' binding context of the AppDomain with ID 1. The cause of the failure was: System.IO.FileNotFoundException: Could not load file or assembly 'Download Client.XmlSerializers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
[code]....
however when i turn off exceptions serioalization works and i dont have a problem.
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Oct 4, 2008
I have about 4000 objects of a class, each object with 20 members/variables, integers and strings, total about 80000.
I would like to save these to a file, and read them back into objects when the program starts up.
How would I do this in order to keep track of each variable? I was planning to have each line in the file representing the variables of 1 object. Hence 4000 lines. But basically I'm just looking for the easiest way to save and retrieve this data. Should I first convert the objects to an array of strings?
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Feb 5, 2009
how can i serialize 2 lists(of classes) into 1 file?
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Oct 19, 2011
i want to save my vb.net data in .ini file suppose i have chechbox in vb.net form if i checked the checked box save check box value and field in .ini file like SMScaster software [URL]
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Jan 12, 2011
Is it possible too have this form save data to a file,and be updated all the time. Will this form have too be made in Access? and have a database. Just looking for something simple to store address in and be able to search for a name and have it go too a address label.
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Aug 30, 2011
I'm working on simple application on VB Express 2010 and I want it to save some data in XML file.
The XML file is going to look like this:
<XML>
<Info>
<X1>some data</X1>
[Code]....
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Feb 6, 2010
Tag and image files. All my files are .gif files and all have the same format. However, some of my 'objects' are located at different positions on the image. I would like to store the position in a Tag and save the Tag with the file. This is what I did..
Code:
dim pathload As string = "C:\myfile.gif")
dim picViewer1 As New PictureBox
Sub graphlocationsave()
[Code].....
I know the data get store in the Tag, but I do not know if its not saved, or I am not retriving it correctly or if this is the wrong way to do this altogether ?
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Feb 14, 2011
How to export Data To save as .xml file can be open in excel 2003,2007 ,stata 1.0,browser
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Jan 6, 2011
Let's say I got a Dictionary type object holding some important info. Well, my user wants to close the program and work on it later.
How do I save the Dictionary and other variables in one single file, which can only be read by my program itself?
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May 14, 2009
How do I get it so that when I click a button on a windows form, it exports the text in a textbox to a .txt or .xml file. I need it to add the data to one text file, not create a new one every time the button is clicked.
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Feb 27, 2011
I was trying to export a data from the listview control into an excel format and I was able to make it successfully using a command button directly. I want to use a SaveFileDialog to export and save the content of the listview. I searched from MSDN website and got a sample code which was originally intended for saving an image file. I tried to used it and edit the code and combine my code to export the data content. It ran successfully and attempt to export the data in an excel format but when you open the file in the path as to where you save the data, it gives you a message "Excel cannot open the file 'Filename.xlsx' because the file format or extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file." and it just leaves an empty excel file. I read from the MSDN site that if you are using an MS Office 2007, the file extension for excel would be '.xlsx' and not 'xls'. Let me give you the two codes I tried to use. First, I used command button and was able to successfully export and save the content in an excel format but using the SaveFileDialog was not successful. I suspected that there's something wrong within this line 'oBook.SaveAs("saveFileDialog1.FileName.GetType()")' and 'Dim fs As System.IO.FileStream = CType _(saveFileDialog1.OpenFile(), System.IO.FileStream)'.
Here are the two diffrent codes I used:
'Using the command button-----successful
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim oExcel As Object
[Code].....
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Mar 21, 2008
I'm designing a very simple program that will need to save both data and photos to a cd but my code refuses to let me do it. Here is what I have:
FileOpen(1, "E:FileWithData.dat", OpenMode.Binary)
FilePut(1, AString, 10)
I keep getting an incorrect function at FileOpen
I saw some methds which take numerous lines of code but I like to keep my code very simple so I can easily tell what it does.
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Aug 1, 2011
How I wan to do save data from xml file to dataview. How can i do it
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Apr 7, 2010
In order to save data into excel file in my application, I need to define
Dim excelApp As New Excel.Application
but I got error message: "Type Excel.Application" is not defined. What component I might miss?
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Sep 13, 2010
Anyone tell me how to save data to ms access file
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Apr 18, 2009
I'm trying to figure out why my savefiledialog data (filter, Filename, Title etc) doesn't appear to show once the savefiledialog forum pops up, i can't see waht i have done wrong[code]...
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Oct 3, 2011
i am download a file that needs to save in app data and i get an error when i use this code
My.Computer.Network.DownloadFile _
("http://www.cpgames.co.uk/minecraft.jar", _
"c:Documents and settings",System.Environment.UserName"appdata[code]....
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