Dynamic XmlSerializer That Identifies Object Type From Xml-serialization?

Feb 3, 2011

Is there any way to create an XmlSerializer that stores along with the serialized data the data type, then when deserializing, it automatically identifies the type of the serialized object and creates an object of that type (returned as object).

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XMLSerializer Type Serialization?

Jan 15, 2009

I'm trying to serialize a user's preferences by means of an XMLSerializer. The preferences class contains Strings, Integers, Booleans and several Color structure variables. The serialization doesn't throw any errors, however the generated xml file has empty values only for the color variables.I tried the following two declarations of the XMLSerializer object, neither workerd.

[Code]...

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XmlSerializer(Type) Constructor Throws ArgumentNullException

Dec 27, 2010

I've been having problems with following code on some computers, while it's worked super on others (most):

Dim xmlSer As New System.Xml.Serialization.XmlSerializer(GetType(XMLContext))
which produces the stacktrace:
System.ArgumentNullException: Value cannot be null.
Parameter name: type
at System.Xml.Serialization.XmlSerializer..ctor(Type type, String defaultNamespace)

How can that code throw that exception, when the argument is drawn from a gettype call, and note that it doesn't happen when debugging on my own PC, only when it's installed on some of the client PC's???

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Put The XMLSerializer Behind A 'facade' Class That User Won't Have To Supply Type Info To The Constructor?

Mar 19, 2012

I wish to put the XMLSerializer behind a 'facade' class of mine so that user wont have to supply type info to the constructor. But doing this has a problem. Consider this class:

Class XmlFormatter
Private Shared xs As XmlSerializer
Public Function Deserialize(ByVal serializationStream As Stream) As Object
Dim o As Object = Nothing

[code]....

The problem is that the user of this class cannot use Deserialize without first using Serialize because the XMLSerializer instance is created in Serialize and it is shared. But using Deserialize without this instance will simply return Nothing.

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XML Serialization Of Object With Other Object Inside .net

Nov 29, 2010

I'm trying to XML-serialize a class the properties of which I use to format a document.Basically, it is a class for the document's header and another class for its rows. url...In this class diagram, the class I want to serialize is ExcelPrintCorte that inherits its methods from ExcelCabec and has a private member ExcelPrintDocumento (and a public method to get it).My purpose is to XML-serialize ExcelPrintCorte and save the inherited properties' values and also the properties' values of ExcelPrintDocumento. I followed many guides to XML-serialize an object but it saves nothing but: [code] So, what am I doing wrong? Or is what I'm trying to do not possible with XML serialization?

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User Settings XML Serialization Of An Object?

Jul 17, 2009

I am trying to save a custom object as a user setting in a VB.net app. This object consists of a List(Of Pair(Of String, Object)). Pair is a custom class which has two read/write properties (a String and an Object).

If I put simple types like int, string, datetime as the second value of my pair, the setting is saved without any problem. But if I try to put something more complex, like a list, there seems to be a problem during serialization and my setting is not saved.

String values in my pairs are serialized like this:

<value1>Priority_1</value1>

Object values are serialized with a special attribute:

<value2 xsi:type="xsd:int">2</value2>

Seems like values of type Object are serialized differently, to "remember" what is the real type of the object. Why can't it do the same for more complex types like List(Of T)?

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XML Serialization Arraylist With Multiple Object Types?

Feb 10, 2010

My quest is in regards to xml serialization. I need to get rid of the root node of a collection. I don't have access to my source now so I'll just try to generalize

public class SomeClass
'...some other properties...
<XMLArray(isnullable:=true), _
<XMLArrayitem(datatype:=(getType(object1)), _

[code]....

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Post A GOOD And Short Example Of Serialization And Deserialization Of An Object?

Oct 30, 2010

Can somebody post a GOOD and short example of serialization and deserialization of an object?Where it can produce an output to string and later be crypted for database purpose. ^.^

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Serialization Fails Because A Form Is Handling A Custom Object's Event

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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Dynamic Type Definition - Error: Type PropertyType Is Not Defined

Mar 11, 2011

I have this code working. It sets the Visible property of controlToSecure to False. [Code] However I would like to get rid of hardcoding types of properties. In this case i'm hardcoding Boolean. Instead I would like to define the property type dynamically. I tried it like below but I get an error on line 2 "Type property Type is not defined". I just defined that type on the line before though? Does anyone know why this doesn't work and how i could get it to work? [Code]

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Unable To Cast Object Of Type <object> To Type <same Object>

May 7, 2009

This error makes no sense to me[code]...

Unable to cast object of type 'DynamicTreeNode' to type 'DynamicTreeNode'.

I have an inherited TreeView with an inherited class called DynamicTreeNode inside it. I am trying to loop through the DynamicTreeNodes in the TreeView.Nodes property which is causing this error.

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Asp.net Mvc - Dynamic Object Properties In A MVC Helper On Entity Framework Object

Jul 20, 2009

I want to build a MVC helper function for which I pass a Entity Framework object and have it build a select. Generally speaking I tried something like this:

Public Function RenderSelect(ByVal helper As HtmlHelper, ByVal sSelectName As String, ByVal aItmes As Array, Optional ByVal sTitleKeyName As String = "name", Optional ByVal sValueKeyName As String = "id") As String
' open select

[Code].....

However, it isn't working. It would be great to have a way to do this and pass the current entity object.

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Dynamic Object Properties In A MVC Helper On A Entity Framework Object?

Oct 26, 2010

Dynamic Object Properties in a MVC Helper on a Entity Framework object

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VS 2010 - Unable To Cast Object Of Type 'System.String' To Type 'System.Object[]'

Jan 25, 2011

For I = 0 To 10
If Items.Count = 0 Then Exit For
Dim T As New Thread(AddressOf Thread)
T.Start(New Object() {"Test", "Test"})

[code]....

When I put same code in empty project it works.

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Serialization Missing Dot Right Before New Line Serialization

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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Casting Early Bound Object Type Into Late Bound Object Type?

Jul 5, 2010

I've got a piece of code in a project (MyProject) that contains early bound object from a referenced assembly (We'll call it CommonAssembly):

Dim myObject As CommonAssembly.MyEarlyBoundType

now I have another assembly that is dynamically loaded because it is not present in all projects:

Dim myLateBoundObject As Object = AppDomain.CurrentDomain.CreateInstanceAndUnwrap("Utils", "Utils.MyLateBoundType")
MyLateBoundType derives from CommonAssembly.MyEarlyBoundType, and I want to cast myObject to myLateBoundObject and then programmatically invoke the additional

[Code].....

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Unable To Cast Object Of Type 'System.Object[]' To Type 'System.String[]'

Apr 5, 2009

i always get this error when i tried to update my table: Unable to cast object of type 'System.Object[]' to type 'System.String[]'.

i only want to update STATUS, ENDTIME, and PRICE

the data type of each field are:
STATUS = nvarchar
ENDTIME = smalldatetime
PRICE = money

[Code]....

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C# - WCF Serialization And Interfaces - Error: List(of Object) Cannot Be Converted To List(of IMyInterface)

Oct 16, 2009

Does link text mean I have to return a concrete implementation? Even though I am using svcutil with the /r that includes my entites(where IMyInterface is defined). I get no errors but it changes all List(of IMyInterface) to list(of Object) and I cannot deserialize it on the client

Error: list(of object) cannot be converted to list(of IMyInterface).

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Asp.net - Unable To Cast Object Of Type 'ASP.webform1_aspx' To Type 'System.Web.UI.WebControls.Button'

Jan 28, 2012

when view in browser, i got this error: Unable to cast object of type 'ASP.webform1_aspx' to type 'System.Web.UI.WebControls.Button'.

how should i solve this problem?

Line 7: If Not Page.IsPostBack Then
Line 8: Dim rowIndex As Integer = 0
<b>Line 9: Dim btn As Button = DirectCast(sender, Button)</b>

[Code].....

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Unable To Cast Object Of Type 'ADODB.InternalField' To Type 'System.String

Apr 19, 2010

I had write code (just for learning), the codes :

dim Temp as string
Temp = Recordset("
Table_Field")

but, when I start Debugging the error messages "Unable to cast object of type 'ADODB.InternalField' to type 'System.String"

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Unable To Cast Object Of Type 'IMAPI2FS.FsiStreamClass' To Type 'IMAPI2.IStream'

Apr 13, 2011

I am implementing IMAPI2 into my vb.net project but ran into a wall. I am getting the message Unable to cast object of type 'IMAPI2FS.FsiStreamClass' to type 'IMAPI2.IStream' when trying to start the burn. I googled around and found this is something that microsoft hasn't fixed.. which basically renders IMAPI2 useless in vb.net.

I found a post on codeproject.com by eric hadden who combined the IMAPI2.dll and IMAPI2fs.dll into an c# interop file. I also see the IBURN interop in microsoft SDK samples. I'd like to use either, but it's in c# and I'm using vb express. Does anyone know a way to get the interop into visual basic or a way around "Unable to cast object of type 'IMAPI2FS.FsiStreamClass' to type 'IMAPI2.IStream'"?

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Unable To Cast Object Of Type 'System.IO.FileStream' To Type 'Excel.Application'

Jun 1, 2009

I'm having a problem with converting from one source type to a destination type. I have a form with 2 buttons (button 2 uses the OpenFileDialog to have the user open an excel file set to NewFile),(button 1 takes the contents from specific cells in NewFile and arranges them how I need into oXLApp1).

The error I get is "Unable to cast object of type 'System.IO.FileStream' to type 'Excel.Application'." in line 14 of the code below.

Public Class Form1
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

[Code]....

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Unable To Cast Object Of Type 'System.String' To Type 'ADODB.Connection'

Mar 19, 2009

I'm new to VB 2005, the code below is actualy coded from VB 6 and just converted it to VB 2005. I'm having trouble with line that's on bold letters.In VB 6 this works just ok. By the way the error message is "Unable to cast object of type 'System.String' to type 'ADODB.Connection'." [code]

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Error : Unable To Cast Object Of Type 'ClassA' To Type 'ClassB'

May 24, 2011

I can't cast my objects. I get: "Unable to cast object of type 'ClassA' to type 'ClassB'".

The service Class:

Public Class svc_Insp
Implements Isvc_Insp
Public Function Test(ByVal pm_income As ClassC) As String Implements Isvc_Insp.Test

[code]....

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Unable To Cast COM Object Of Type 'System.__ComObject' To Class Type?

May 14, 2009

Unable to cast COM object of type 'System.__ComObject' to class type 'rjsDocMan.Folder'.Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface.The code where it is flagging the error is:

<div style="color: Black; background-color: White;">
treeview += AddChildren(Session("DocMan").RootFolder)
</div>

[code].....

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Unable To Cast Object Of Type 'SZArrayEnumerator' To Type 'WindowsApplication1.myEnumerator'

Dec 18, 2009

I saw this thread and I had simple answer in mind. To use custom enumerator class. So I was trying to make one for that guy, which would have one more property to check whether its has reached end or not. It would also provide current position.I'm getting an error "Unable to cast object of type 'SZArrayEnumerator' to type 'WindowsApplication1.myEnumerator'." at the line 6 [see below].However, return type of values.getEnumerator says its IEnumerator. [code]

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Unable To Cast Object Of Type .objectquery To Type Generic.list

Sep 12, 2011

I have a question about ASP.Net, visual basic I have 2 LINQ query's, the first one works, the second one doesnt, produces a

"Unable to cast object of type 'System.Data.Objects.ObjectQuery'1[SelmaV2.Products]' to type 'System.Collections.Generic.List'1[System.String]'.

[Code]....

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Unable To Cast Object Of Type X To Type X On Setting DataSource To A Table?

Feb 19, 2012

Columns 0 & 1 are filled from a DataAdapter from Access Database and three are added. I had this working, but I changed it to check for the column "Feed" so I could add several Locations. At first this worked,but I did someething in perfecting it and it now fails after filling the first row of the datagridview (dgvFdMed).I ran a check and the table LotsTab has 8 rows filled. Column 1 & 2 are strings and the database appears they are fine. The added columns have just been created with no value. My plan is to enter the values and then use the data from the grid.

Private Sub sfillGrid(ByVal Loc As String)
Dim i As Integer
Dim column As DataGridViewColumn

[code]....

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VS 2008 Unable To Cast Object Of Type FrmChild1 To Type FrmChild2

Dec 8, 2010

I have 2 Child forms inside a parent. For example, FrmChild1 contains a "Friend Sub" I wish to call.I would like one of the child forms to call that sub from another child form (we will call it FrmChild2. The following code works, but when it's done going through the "For Each", I get a "Invalid Cast"

' THIS CODE IS IN FrmChild1
For Each mFrmChild2 As FrmChild2 In FrmParent.MdiChildren
mFrmChild2.GuestRefresh(False)
Next

Error after calls are made:"Unable to cast object of type FrmChild1 to type FrmChild2.

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Asp.net - No Mapping Exists From Object Type System.String[] To A Known Managed Provider Native Type?

Jan 27, 2012

I am getting this error No mapping exists from object type System.String[] to a known managed provider native type.The code is

Dim conn1 As SqlConnection
conn1 = New SqlConnection("Data Source=win2008-2;Initial Catalog=h1tm11;User ID=sa;Password=#1cub3123*;Persist Security Info=True;")
' Dim conn1 As String = ConfigurationManager _ .ConnectionStrings("Connectionstring").ConnectionString()
'conn1.ConnectionString = ConfigurationManager.ConnectionStrings("Data Source=win2008-2;Initial Catalog=h1tm11;User ID=sa;

[code].....

the error occurs at adapter.Fill(table)

Dim addressstring1 As String = txtpostcode.Value.Trim()
Dim addressstring() As String = Split("addressstring1", ",", 1)

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