VS 2010 - Saving Class To File Via Serialization?
Feb 13, 2012
I am having trouble saving a class to a file via Serialization. I am getting this error:
Type 'System.Drawing.Graphics' in Assembly 'System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' is not marked as serializable.
I have changed the:
Public Class cJigsaw
to:
<Serializable()> Public Class cJigsaw
The next line in my class is:
Public img As Bitmap
I tried adding the <Serializable()> attribute to this code, yet it has this error:
Attribute 'SerializableAttribute' cannot be applied to 'img' because the attribute is not valid on this declaration type.
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Feb 12, 2012
Currently I am saving data from my applications by saving a text file via a stream reader as a string. I have come to a problem. In my current application, I have an array of the following structure:
[Code]...
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May 8, 2012
In short, I can't seem to get the xml serializer to serialize an array of one class type embedded within an array of another class.I have two classes, one of which contains an array of the other class, as follows (there are other objects in the classes that I've not included):
[Code]...
There must be a simple way to get the XML serializer to serialize the array of the class embedded within the array of the class that I am serializing. Am I missing something?
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Jul 2, 2010
I want to know the disadvantage of serialization of a class in vb.net. As I am using it for deep copy only. Is it correct or not?
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Mar 17, 2010
I'm trying to make this work here is the code it's quite simple the serialization work's though the deserialization dosen't.[code]...
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May 16, 2010
I have a question about how to save a class object to a file that can be used to create a same class later. The class should contain some structure or proprties and different types of data such as Byte, String, Bitmap, Color and so on. Is there any good way to save all these things? Convert the whole class to byte or make it to XML? The only way I know is saving to XML, but I feel hard to write all types like Image, Array List in XML. Here is a part of the class:
[Code]...
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Jun 16, 2011
I have an error in the the following class, but am unsure where it is. The class will return correctly in my service but does not serialize and return any results.
Imports System
Imports System.Data.Objects
Imports System.Data.Objects.DataClasses
Imports System.Data.EntityClient
Imports System.ComponentModel
Imports System.Xml.Serialization
Imports System.Runtime.Serialization
[Code] .....
This will not be the final iteration of GetEmail, but I am using this in it's current state to try and figure out why I am not getting the class to serialize correctly.
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May 9, 2009
Public WithEvents Tree as Tree. I am not able to Serialize the Tree class, but if i remove the "WithEvents" keyword, it works fine. Why? What should I do if I have to declare it with "WithEvents"?
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May 28, 2009
I currently have a class
Code:
Public Class Customer
Public Property AccountNumber() As String
Public Property PMDue() As String
[code]....
Account Class is initialized as new customer. To save the data from each property in the Account Class, I'm currently looping thru the properties each time Account obtains new data. I tried to simplify the process by the following line...
Code:
CustomerStreamToWrite.WriteLine(Account)
This does not work as written. I figured it would be much faster. It did not write out the property data. It saved "WindowsApplication1.Customer" Not exactly what I wanted. Is there a method to get it to save the properties in a written out style by just using the class name?
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Mar 5, 2010
I need to avoid serializing an Event class member because when the event is handled by an object that is not marked as Serializable the serialization will fail.
I tried using the NonSerialized attribute on the Event class member but it fails to compile. This line of code:<NonSerialized()> Public Event PropertyValueChanged()
produces the following error: Attribute 'NonSerializedAttribute' cannot be applied to
'PropertyValueChanged' because the
attribute is not valid on this
declaration type.
Public Event PropertyValueChanged() ' compiles but needs the extra handling described below
Is there another way to avoid serializing Event members? This is not a problem if the event is not handled and I can work around it by cloning the objects (and ignoring the event) before serializing them. Just wondering if there is a better way.
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Dec 31, 2010
I've written one pgm that used byte serialization to save a file. It eventually morphed into a program and a library class (dll) so I could save/retrieve the byte serialization/desrerialization file from a different program that would use the same dll that originally serialized file in the first program. But, the first program seems to own the serialized file, not the DLL. The first progam is GenerateEventList and has the added reference Imports EventDBS which is the DLL. The second program EventDisplay also has Imports EventDBS to read the file. It produces the exception:
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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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Apr 20, 2011
im having a problem saving text.. this is the problem i have a textbox that a multiline... now when i click the save button it pop up a save file dialog.. now i want to do when the user click the ok button in a save file dialog it will save as a text file and their file name is the user input into the save file dialog..
i use the system.io.streamwriter but i dont how to save the text in the textbox..
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May 13, 2012
I am trying to save text written in an Richtextfield into a .txt file. The problem is that the vbCrLf's are not stored. The *.txt file is written in one line.
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Jul 26, 2010
I am sending some data in a Serialized Structure across a TcpClient Stream to a Client. Now, sometimes the results get through, other times however, it does not. I've noticed this is true when the data I'm sending gets rather large. The server locks up at sending it and can't continue on.I'm sending this structure:
<Serializable()> Public Structure SearchResults
Public Property Results As String
Public Property Search As Boolean
End Structure
When Results gets kind of big (say, 411,000 characters in length), the server fails to send it, I get no error, and I end up timing out completely. If I connect via localhost", I get it instantly, so I know my code works. My problem is I've sent different structures with more data (2 million characters) way faster (nearly instantaneously) across the Internet (not localhost) in less than half a second.
Private Sub SendMessage(ByVal message As Object)
Try
SyncLock m_Client.GetStream
BinFormatter = New Binary.BinaryFormatter()
[code]....
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Mar 23, 2012
i am having a problem saving the file, when i save the file in the directory (with save as)
C:UsersuserDocumentsvb Toolkit save
Now i try moving the vb files by save as again to
G:Backupvb Toolkit save
When i load the file up it says that my form1.vb missing or deleted but when i check in the files
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Mar 6, 2011
I could find on using the SaveFileAs Dialog control would get the part where the code should be to actually write the file to disk, and there would be this comment:
'insert code to write file here
or something similar. So anyway, I thought this might be of use to someone else in a similar situation. This is what I came up with to finally "save" a file with the SaveFileAs Dialog. In this situation, I wanted to save the current document of the WebBrowser1 control via the SaveFileAs Dialog when the user clicked the btnsave button...
Private Sub btnsave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsave.Click
Dim saveFileDialog1 As New SaveFileDialog()
[Code]....
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Feb 19, 2012
I basically have a program where people type in their username and password, and then once button1 is pressed the program takes you to a website and logs in for you. The whole point of this is to fast the process.
[Code]...
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Mar 2, 2012
i want to know how can i save data from datagrildview to XMl file with writexml method or any other method
here ds is my dataset and after updating datagrildview i want to update ds and save/update XML file
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Sep 13, 2010
I have a MRU list that keeps on clearing when I close my application. In order to keep this information, I am trying to serialize it to an xml file, however, I can't figure out how to get the list written to this xml file.
Class
<Xml.Serialization.XmlRoot(ElementName:="Class_mrulist")> _
Public Class MRULIST
[Code]....
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Mar 9, 2009
rewriting a class I use for saving Treeview data to a XML file for use of saving ListView data I can't really figure out the rewrite, I'm stucked, unfortunately Listviews seems to be a big problem for me in general.
Option Strict On
''' <summary>
''' The TreeViewDataAccess class allows the nodes within a TreeView to be
''' persisted to xml for later retrevial.
''' </summary>
[Code]....
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Jun 1, 2011
I'm a novice, messing around with input boxes in VB 2010 Express. I know most programmers recommend not using input boxes except for the simplest things, but what I'm doing IS the simplest thing. Besides, I'm really just experimenting for the sake of learning.
I want a few input boxes to appear, one at a time. Let's say there are six input boxes in this project. The user can input anything he wants in each input box. After the user has entered text into the six input boxes, the program should write the text to a file. This is the part I'm having trouble with. [Code]
I haven't figured out if title.input is correct or not, or if I need something instead of commas in between each item. And the headers (i.e. the "First Name" stuff) needs to be added in there also, but I need to get the syntax of the code right first before getting to that.
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Aug 18, 2011
I am trying to create a console application that allows me to read the contents of a text file and saving the data by specific name in a set of files. For example, the text file I am going to read is a tab delimited file. Some content of the file includes full name, school, location, and whatnot. I want to save the content by school name in a set of files that have the school names. In this case, everyone that attends "Central" will be saved in a file named Central.txt.Everyone that attends "Central Park" will be saved in a file named Central Park.txt.These are the sub procedures I came up with so far:
Readfile()
'Use StreamReader
WriteFile()
And I think I am on the right track of reading the text file:
Dim objStreamReader As StreamReader
Dim strLine As String
'Pass the file path and the file name to the StreamReader constructor.
[code]....
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Jul 16, 2010
i need to save an array of intptrs as a part of a structure in a file, vb.net gives me "File I/O of a structure with field 'pList' of type 'IntPtr' is not valid." error, ok i figured and tried to convert them to integers and while it worked for other singular intptrs it did not for the array as it just throws me a conversion error. I then tried rebuilding the array in the new sub of the save structure and while that sorta worked(i think) it then gives a "bad size" error when saving. Im out of ideas, saving the array elements one by one would be suicide as the amount varies and is well in hundreds,
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Dec 11, 2011
I am using this code for save the items into a text file:[code]I want to save the items without blank lines like
-item1
-item2
-item3
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Jun 3, 2011
I have used the following code too save a notepad file; [Code] The code saves files but only in the 'Application.StartupPath' folder, the save dialogue starts in the correct place a quizzes folder inside the debug folder but files can't be saved here or in folders inside it, even though you can browse them in the dialogue. I want it saving where navigated to in the dialogue.
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Aug 22, 2011
I'm making a simple little program. It's going to save the image in the clipboard (from pressing Print Screen) to the folder that the .exe is in. My problem is trying to find out how to save the image file with a user-specified name, such as "Image", then adding numbers to it. So it would be like Image_00001, Image_00002, etc. I would like to make the name be specified using a textbox (pretty easy). I know how to get it to save as different image formats and all, and I know how to get it to save as a hardcoded name in a hardcoded location, but that it isn't what I'm aiming for. If you've ever used the screenshot function of Fraps or MSI Afterburner, then that's basically what I'm trying to make here.
I've already searched these forums and did some Googling, but couldn't find anything that I was looking for. Not even a sample program with something like this. I found something in the CodeBank, but it's all the stuff I've already gotten implemented.
[Code]...
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Apr 19, 2011
I have searched far and wide and have not been able to find a solution to my problem.I have a typical situation where a process is gradually eating up memory. The process eventually throws an OutofMemory Exception. This problem has been dealt with in the past by just building a special machine that has greater memory.
This process bombs on only one of our clients which has around 450,000 records. We iterate through the collection of accounts and build a class object that is then passed into the xml serializer. This object has several properties and methods that would not all be populated at the same time. These objects are populated based on the information in each account record.
I've checked on the way we call the contructor for the XML Serializer and it is in the format that would store the xml assembly and not create new ones each time. So, I do not believe there is a memory leak due to the creation of the dynamic assemblies.How we call the serializer: Dim k1Serializer As New XmlSerializer(GetType(ClassObject))
My questions are:When serializing a large object, does the serializer look at every possible serializable object or just the ones that are populated by your object?
Could the serialization of this large class object be causing an issue?I noticed when we pass in the serialized object, it's not automatically written out to the file specified. It takes a few seconds to, I guess, serialize the object and then write it out. Could the fact that we are iterating over so many records, so quickly, that the serializer is not having enough time to write out to the file and then release the memory?
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Apr 22, 2011
I recently made a simple pseudo-encryption program that changes each character into another. It is capable of encrypting and decrypting a string. This can also be done to any text file as well. The characters range from ASCII 32-254 (This on it's own may be an issue because of #127 being DEL).
Because I believed my own coding may be at fault, I attempted this with Triple Des with identical results.For Triple Des, the requirements for en/decryption was:
Encrypt: String to Byte
Decrypt: Byte to String
And to change them either direction, I used UTF8. I also attempted ASCII and UTF32, but I don't know what I should do. I am considering dropping this but I want to learn problems like this because I am currently in college and haven't started my core classes for programming yet and want the head start.
The point where I have come into a problem is attempting to do this to another file type like an image. I looked at the results from encrypting then decrypting and the results were similar, but it seems file encoding must be the culprit.
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Aug 25, 2011
The object is to load an image into a picturebox, then save a new copy of the image in a different location, but with the height and width of the image box not the original file's height and width but I can't figure it out. I've got the loading and saving working no problem but getting it to adopt the new size is stumping me, it just keeps saving with the original file's size properties
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