C# - How To Ignore Event Class Member For Binary Serialization
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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Mar 3, 2010
I'm creating an application that uses several "multi-leveled" structures (structures within structures within structures....) to store reference data.
<Serializable()> Public Structure ControllerType
Public Attributes As ControllerAttributeType
Public Description As XCData
[Code]....
Three questions:
1) Is the "CloneObject" function solution able to be used in my application?
2) If it is, what is the fix for the XCData typed objects?
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Jan 26, 2011
I would like to handle the progress of binary serialization / deserialization of files to show a "loading" progress bar to the user but I cant't find a solution to do that.
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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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Aug 26, 2011
I used the ideas from this post to create a custom collection of my custom class, so that I would be able to easily sort my collection. My project uses binary serialization to save everything (well the important stuff anyway) to a file. The problem is that my custom collection now breaks the serialization.I can't seem to figure out how to get the custom collection to serialize![code]
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May 1, 2012
We need to store a list of data we pull from another table that relates to one of our models. (We are too deep into build to add this relationship to our DB where it should be.) When we attempt to load this list in a property of the model that needs it.We load this list into a dropdown in a view. The error occurs trying to load this list into the model in the controller. The true caveat is that we have a unique dropdown list for each record in our table in the view.
Our Class:
Public class OurModel
public property ID As Integer[code]....
Error: LINQ to Entities does not recognize the method 'DB.ModelTable get_Item(Int32)' method, and this method cannot be translated into a store expression.
UPDATE: The issue appears to be that LINQ is trying to do something with a the DBContext of a query I do previously in this controller. The error is referencing DB.Employee not DB.Position which is what I am querying.
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Sep 28, 2010
i am studying and now working with Visual Studio 2008 Professional Edition. I am working on my project regarding "Serialization". I wanna to start my working with "System.Runtime.Serialization.Formatters.Binary" namespace because i am working on serialization project. I know by default IDE dosen't import it. So i went to add it in my project at "Add reference dialog" but i still unable to find out this namespace.
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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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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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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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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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Sep 11, 2009
How can i make one item in my class not serialize?
I have tried adding:
<System.ComponentModel.DesignerSerializationVisibility(System.ComponentModel.DesignerSerializationVisibility.Hidden)> with no avail
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Jun 30, 2011
I am making a custom menu. I am applying colors on panels on mouse enter and mouse leave.I have labels on these panels, and the mouse enter and leave events work snappy, but as soon as I hover over the label (on/inside) the panel, the mouse leave event is fired. I know I can just do the same thing for the label mouse enter event, but I am doing some other visual stuff, and I need to have the label mouse events totally disregarded.
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Aug 12, 2009
My application's binary serialization was working well up to today (this is not a released app yet - still in development). I have a "Project" class that is the top-level class of a hierarchy of other classes related to its function. And before you think it, yes, all of those classes are marked as serializable. Infact, they all were being serialized before today.
I have one event on the Project class that assists in informing when the project's save status has changed (i.e. new, modified, saved). This event was added today along with some events on the other classes that filter up to the Project class (the project needs to be told when its objects have been modified). I unfortunately added all of this at the same time so I can't provide any incremental details as to when it stopped working, but when I try to save the project through my binary formatter it tells me that my main form is not marked as serializable. Well, yeah... of course it isn't! it shouldn't need to be because there is no member of my classes that even mentions the form. But for some reason handling the Project's event on the form triggers this error.
Serializing the form is not a solution. Neither is not being able to handle my Project events. If I comment out the handler it works fine -- and I don't even have to remove the WithEvents keyword on my form's Project variable. Now that I write that I'm speculating that it may have to do with the event being raised as a result of the serialization (occurs when the save button is clicked).
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Jan 5, 2010
I am using a class derived from NativeWindow to get access to WndProc for various text boxes on my form. I am trapping the WM_CONTEXTMENU message. I assign the handle in the Enter event and release it in the Leave event. Everything is working as expected except for one situation. If the user right clicks to select a new textbox, the first WM_CONTEXTMENU message is either skipped or is fired before the handle is assigned in my code. If I set a break point in the Enter event, the issue described above does not occur.
In all other cases, tabbing into the textbox, setting the focus to the textbox in code or left clicking in the textbox to select it, everything works as expected. To test the above, I also trapped WM_RBUTTONUP and display a message box. In all of the cases noted above except for selecting the textbox by right clicking it, the message boxes are displayed and then the context menu is displayed. When selecting a textbox by right clicking it, the message boxes are not displayed and the context menu is. Could this possibly be a bug in the NativeWindow class?
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Oct 24, 2009
I have a windows application that has a tab control with 5 different tabs. Each of these tabs has a datagrid view that is populated with data on form load with data from SQL Server. I have an event handler for the datagrids for CellValueChanged that appends an asterisk, "*" to the tab, when a change is made, this is meant to mimic the same behavior in VS or SSMS. The issue that I have just realized is that on page load as the datagrids are populated this event handler is raised thousand of times. I have included an If Then statement to exit the sub if it occurs during page load, but am concerned about the performance implications, if any. Is there a better way to handle such functionality? Possibly a way to ignore the event handler on form load? If not is there a negative impact leaving this functionality in?
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Jun 2, 2011
how do I overcome it? I have created a class and compiled into .dll This code
[Code]...
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Aug 13, 2009
In Visual Studio 2008, if I do this:
[Code]....
Does anyone here know how to get the above to work WITHOUT warnings being generated?
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May 31, 2010
In the following code i get a warning at line 59:Warning 1: Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated.and.. At line 78 I get this Warning:
Warning 2 Property 'SelectedCustomer' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used.
The program compiles and runs well, but i cant' undesrtand the reason for these warnings. Any Idea ?
1: Public Class Form1
2:
3: 'Form level members
4: Private objCustomers As New ArrayList
[code]....
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Apr 28, 2011
Cannot appear to be able to get this function to not have the above error.Private Function GetIncidentActions(ByVal FromAgentID As Integer, ByVal ToAgentID As Integer, ByVal incidentAction As Integer, ByVal ActionDate As Date) As String
[Code]...
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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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Dec 27, 2010
Is it possible to raise event in one class and handle the event in another class? If so, how?
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Apr 13, 2011
I've encountered a problem which challenges my understanding of access modifiers in VB.Net. I have a class declared Friend. If I declare its properties Public, the application works. If I declare them Friend, the application fails.
Before this, I believed that, in a class declared Friend, it would make no functional difference whether I declared the members Public or Friend. I thought class access declarations applied their restrictions to all nested entities, so nested properties declared Public were effectively restricted as if they had been declared Friend. Obviously, I was wrong. Can anyone explain how access modifiers really work, or point me to the relevant documentation?
Here is a more detailed description of the situation: I have a Friend class called StripTask with properties called StripDate, HistorianDate, and TaskText. I have a collection of StripTasks (called _StripTasks) which is used as the data source for a Syncfusion GridDataBoundGrid. The way the binding works, I need to pass the name of a StripTask property to each of the grid columns so each column knows what data to display. It ends up looking something like this:_DataBoundGrid.GridBoundColumns(1).MappingName = "StripDate". When the mapped properties are declared Public, it works. When the mapped properties are declared Friend, the grid is populated with the correct number of rows, but every cell is empty.
As a follow-up question, is it a good idea to avoid things, such as this Syncfusion binding method, which require me to pass property names as strings? It just feels as if I'm inviting trouble.
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Nov 3, 2009
I realize that this is a very basic question, but it's been a long time since I've played with VB. Why can't I call the Synch() Sub/Function in my CMMS_SCAD_CLASS class from my Main module? I get the following compile-time error:
'Synch' is not a member of 'ConsoleApplication1.CMMS_SCADA_CLASS.'
Main class:
HTML
Module Main
Sub Main()
Dim meterClass As New CMMS_SCADA_CLASS()
[Code]....
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Jun 10, 2010
i made a class which has speed,symbol (string "*") and location what is the acceptable way to actually display the class symbol property on the screen ?the class will be stored in a list<OF T> and will contains hundreds dynamically instances
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Jan 20, 2010
We have a coding standard that says all shared (static) fields and methods must be called with the class name. E.g. NameOfClass.whatever Is there a tool that we can use to check this is in fact the case? (Likewise for modules) I should have make it clearer we are using VB.NET.
[Code]...
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Jun 9, 2012
I have a custom class called "Time" with the following function, for determining if one Time equals another Time.
Public Shared Shadows Function Equals(ByVal Time1 As Time, ByVal Time2 As Time) As Boolean
Dim x(2) As Integer
x(0) = CInt(Time1.Hour)
x(1) = CInt(Time1.Minute)
[code].....
Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated.I know it shouldn't do any harm, just let the compiler skip evaluation, but is it a way of getting rid of this warning?
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