Instance Error in xaml

Last post Tue, Mar 31 2009 6:03 AM by amodkchandra. 1 replies.

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Fri, Dec 12 2008 4:34 AM

Happyarimaan
Joined on Sat, May 24 2008
Kolkata
Posts 18

Instance Error in xaml

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Whenever I try to run my WPF application (window1.xaml) I get the following error :

"Cannot create instance of 'Window1' defined in assembly 'C1WPFGrid, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Exception has been thrown by the target of an invocation. Error in markup file 'Window1.xaml' Line 1 Position 9. "

Why is this occuring ?

Also when I use 'namespace' in code behind file (window1.xaml.vb) the Initialize Component gives an error :

"Name 'InitializeComponent' is not declared" I have also given the code below:

Namespace C1DataGrid1

Partial Public Class Window1

Inherits System.Windows.WindowPublic Sub New()

InitializeComponent()

Dim ProdTBL As New DataTable

Dim OleDBConnection As OleDb.OleDbConnection

Dim connString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Program Files\ComponentOneStudio.NET 3.0\Common\Nwind.mdb"

OleDBConnection = New OleDb.OleDbConnection(connString)

Dim query As String

query = "SELECT ProductID, ProductName,UnitPrice FROM Products"

Using conn As New OleDb.OleDbConnectionDim da As New OleDb.OleDbDataAdapter(query, conn)

da.Fill(ProdTBL)

Dim CIGrid As C1.WPF.C1DataGrid.C1DataGrid = TryCast(Me.FindName("C1DataGrid1"), C1.WPF.C1DataGrid.C1DataGrid)

CIGrid.ItemsSource = ProdTBL

End Using

DataContext = ProdTBL

End Sub

Private _productsDataSet As ProductsDS = Nothing

Public ReadOnly Property ProductsDataSet() As ProductsDS

Get

If _productsDataSet Is Nothing Then

_productsDataSet = New ProductsDSDim prodTA As New ProductsTableAdapter

prodTA.Fill(_productsDataSet.Products)

End If

Return _productsDataSet

End Get

End Property

End Class

End Namespace

PLEASE HELP !!!

Regards ......... Happyarimaan

Be who you are and say what you feel, because those who mind don't matter
and those who matter don't mind.

Tue, Mar 31 2009 6:03 AM In reply to

amodkchandra
Joined on Tue, Mar 31 2009
India
Posts 1

Re: Instance Error in xaml

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This exception is thrown whenever something goes wrong while the XAML code is parsed. However, this exception is not very helpful. So what exactly went wrong? Well, it's easy to find out: In the code-behind, the XAML code is parsed in the method InitializeComponent which is automatically generated. This method is called in the Window object's constructor. So to have more details about the exception, put the call to InitializeComponent in a try/catch block. This way, you have access to the useless XamlParseException, but also to its InnerExceptions and to the StackTrace.

Partial Public Class Window1 Inherits System.Windows.Window

Public Sub New()

Try

InitializeComponent()

Catch ex As Exception

End Try

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