Problem with serialization of objects

One of the key elements that makes ADO. NET superior to ADO is the level of integration with XML. In ADO, XML is just an I/O format. In addition, the ADO XML format is totally inflexible and doesn't allow any type of customization.

Dino Esposito

MSDN Magazine December 2002

I try to save (serialize) a XAML document. The background is that the user of the application should be able to change the XAML document dynamically.

This works fine with some basic controls but as soon as I have a datagrid inside the XAML, non of this works:

System.Windows.Markup.XamlWriter.Save throws:

Cannot serialize a generic type 'System.Collections.ObjectModel.ObservableCollection`1[Microsoft.Windows.Controls.DataGridColumn]'.

System.Xaml.XamlServices.Save throws:

Constructor on type 'System.ComponentModel.ComponentConverter' not found.

I already found in forum that XAML does not fully support generics, however, is there a solution for this? I'm a bit confused because if XAML can be read dynamically it should also be possible to save it...

I use .NET Framework 4.

Thanks for reply... any suggestion is very welcome.

hi

i am trying this code but its giving me "There is an error in XML document (0, 0)."

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml.Serialization;
using System.IO;

namespace GridViewPaging
{
    [Serializable]
    public class Person
    {
        private string _name;
        private CNIC _cnic;

        public string Name
        {
            set
            {
                _name = value;
            }
            get
            {
                return _name;
            }
        }

        public string NIC
        {
            set
            {
                _cnic.NIC = value;
            }
            get
            {
                return _cnic.NIC;
            }
        }


    }

    public struct CNIC
    {
        private string _cnic;
        private bool _isValid;

        public string NIC
        {
            set
            {
                if (IsCNICValid(value))
                {
                    _isValid = true;
                    _cnic = value;
                }
                else
                {
                    _isValid = false;
                }
            }
            get
            {
                if (

Hello,first of all I beg your pardon if my question could be out of topic, but I don't know where to address it. I'm working with 3.5 workflow foundation and I have a custom activity with a field of type DictionaryList, which is a serializable class containing some simple typed members, and a FeedbackItem[] member. FeedbackItem is a serializable class containing an ID (int), a Type (System.Type) and a Value (System.Object) fields. In the designer when I edit the custom activity, and I set the List Property (by using a PropertyGrid) i fill the DictionaryList class with all fields including the array of FeedbackItem. When I save the designer saves the workflow in a xoml file. When I load the xoml in the designer and I open the designer of the List property of the activity the DictionaryList object stored in previous session is missing the contrent of the FeedbackItem array; the FeedbackItems property has a FeedbackItem[0]. It seems like the xml serializer serializes the DictionaryList object but it can't deserialize it completely. Is there something I have to beware of? It's possible that some field in the FeedbackItem is not serializable and causes some error in deserialization process? I don't understand because il I edit the xoml file I can read the array like this:

<ns2:DictionaryList.FeedbackItems>
    <x:Array Type="{x:Ty

Hello,

I am trying to serialize an object using binary and I'm running into an error "Unable to load assembly". I tried creating a new SerializationBinder which loads the correct assembly however it returns an error "The object with ID 7 was referenced in a fixup but does not exist" (I also received the same error but with ID 6).

My code runs in the following way:

A COM visible dll is launched from a VB6 application. This DLL has a reference to a .NET dll which contains the data objects and performs the serialization.

However, If add a new Windows Forms application to the solution, and call the same methods using the same data objects deserialization works without any issues, and no need to reset the binding.

Thank you

 I get the following error on last line below (working on remote host): 'E:\web\sfcascom\ls_admin/uploads/images/001.JPG' is not a valid virtual path,

Note that the slashes go in different directions

I've tried a number of things but nothing seems to work. Thanks-

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Imaging
Imports System.Web.UI.WebControls

Imports System.Drawing.Imaging.ImageCodecInfo
Partial Class Protected_imageupload
    Inherits System.Web.UI.Page
    Private Sub btnUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpload.Click
        ' Initialize variables
        Dim sSavePath As String
        Dim sThumbExtension As String
        Dim intThumbWidth As Integer
        Dim intThumbHeight As Integer
        Dim sFilename As String = ""
        ' Set constant values
        'sSavePath = "images/"
        sSavePath = Server.MapPath("~/") + "ls_admin/uploads/images/"



        sThumbExtension = "_thumb"
        intThumbWidth = 160
        intThumbHeight = 120

        ' If file field isn?t empty
        If FilUpload.PostedFile IsNot Nothing Then
            ' Check file size (mustn?t be 0)
            Dim myFile As Http

I'm working project it's live on shared hosting

we'er uploading photos to a file on the server everything works fine the photo is resized renamed and sent to the folder

the upload page returns the thumbnail and the full size photo it's there all the photos have to be approved by an admin

twice now after they have been approved they disapear I checked the folder they are not there could there be anywhere

on the server they could get hung up before they go into the folder I have it setup so when you delete the data base entry it deletes the photo from the folder othe than that you need to open the folder and delete the photo this has hapened twice now I tried to recreate it with no luck

thaks for your help in advance

I'm having a problem with an asp.net 3.0 application using a gridview to display data.  The problem seems to be that despite a brand new .selectCommand being sent to the sqlDataSource, the gridview starts displaying data from *someone else's* query.  For example, user A is logged in and will be working fine until a few page submissions later when the gridview data starts suddenly showing information that belongs to another user. 

This is my first asp.net application, though I've been working with classic asp and ADO for years so I'm used to sending a SQL string and getting back the results from that string.  Apparently there is a complex caching system which is interferring which I do not at all understand so at this point I just want to stop the server from caching any data whatsoever.  Is this possible?

Any and all help will be much appreciated!!

Hi.,

I store some values from code behind to a label which is Hidden !

<asp:Label ID="lbl_Hidden" runat="server" Visible = "false"></asp:Label>

and at the page load event i retrieve the value of the label & assign it to a string !

stringvalue = lbl_Hidden.Text;

Now i dont know why this manipulation does'nt work !

I've a character 'A' in the string and i'm unable to replace it with a space !

stringvalue.Replace(A, " ");

Wot do u think abt it ????

I have an objuct that I declared like this:

    Class DailyStats
        Dim _day As String
        Dim _hour As String
        Dim _impressions As String
        Dim _clicks As String
        Property Day() As String
            Get
                Return _day
            End Get
            Set(ByVal value As String)
                _day = value
            End Set
        End Property
        Property Hour() As String
            Get
                Return _hour
         

I have a parent page ProdView.aspx and two static UserControls, UC1 and UC2. Each UC is in an Ajax accordion pane and the accordion inside an updatepanel.

UC1 has a Gridview footer with couple of textboxes and a link button that fires an Add Row insert procedure. I want to Raise an event that will rebind the UC2 after the row insert in UC1.

First I created the sub delegate and event in UC1:

• Public Delegate Sub MyRefresh(ByVal sender As Object, ByVal e As CommandEventArgs)
• Public Event Refresh_UC1 As MyRefresh

In the same UC1 the Insert procedure that fires the insert and RaiseEvent:

Sub PricingGrid_Insert(ByVal sender As System.Object, ByVal e As EventArgs)
       Dim myConn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("LocalSqlServer").ConnectionString)
       Dim myCom As SqlCommand = New SqlCommand("AddRow", myConn)
       myCom.CommandText = "AddRow"
       myCom.CommandType = CommandType.StoredProcedure

        Try
            myConn.Open()
       &nb