If we have sample class to store some config data, all is ok, we can save and load it to class.
<XmlRootAttribute("Configuration")> _
Public Class SeriazableClass
#Region "Options"
[code]....
I've created the following basic function to determine whether specific control type is currently loaded:
Private Function IsPreviewerTypeLoaded(Of T)() As Boolean
For Each previewer In LoadedPreviewers
If previewer.GetType().Equals(T) Then
[Code]....
I need to compare each control against the generic type supplied. Equals(T) fails to do the job, producing a compiler error. How to make it correctly?
UPDATE: is the following correct?
previewer.GetType().Equals(GetType(T))
To object oriented programming and programming with visual basic .net (vb 2008 express). regarding storing of information but not in a database. Someone mentioned using binary or xml serialization. So I researched that and after two long 8 hour days of messing around with binary serialization and about a dozen different code techniques i finally found one that seems to work. I created a module that serializes two variables and appends them into a file. The same module also has a sub that deserializes the information from the file and displays in a message box. If needed I'll provide the code later.
Really the problem I am having is that my message box only displays the first entry into the file and no other. So I can append any number of variables to the file but every time I call the subroutine in my module it only displays the first entry. How do you read all of the file? Also can I search the file for a particular value of a variable? The variables are codependent. The two variables are simply a date and a string representing a changing code that corresponds to that specific date. So I'd like to be able to say search for a date and retrieve both the date and the code.
However I don't have any idea how to do this. Also the messagebox.show method is probably not the best way to illustrate the information in the file but I'm still new and I'm not sure the best way to show all the info in the file. For instance if I wanted to show the entire contents or just the codes corresponding to certain dates. I know a database is probably the better answer but I've gotten this far without one, lol, I'm too stubborn to change now. Once I figure this out, I'll switch and try the same technique with a database.
Some code first..this is how i deserialize..This part works.
Dim rdr As XmlReader = XmlReader.Create(New System.IO.StringReader(Replace(prestr, "><", ">" & vbCrLf & "<")))
Dim serialize As XmlSerializer = New XmlSerializer(GetType(ItemLookupResponse))
Dim myProduct As ItemLookupResponse = New ItemLookupResponse
myProduct = CType(serialize.Deserialize(rdr), ItemLookupResponse)
Can a .WPF file be loaded into a tab or a container in my visual basic application. Ill use one of my code snippets as an example. to load another form into a tab control i use.
Private Sub AllToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AllToolStripMenuItem.Click
Dim phoneqq As New PhoneQuote
[Code].....
I have a Child class which uses DataContractSerialization and raises a Changed event when its Name property is set.
<DataContract()>
Public Class Child
Public Event Changed()
The Parent class is serialzed and deserialized and all the data (including the Child) is saved and resored as expected.However, after deserialization, the Changed event is never raised!I know the deserialization process bypasses class constructors, but shouldn't the event be initialized?Is it possible to serialize/deserialize the Event?Is there a way to initialize the event in the OnDeserialzed method of the Child rather than the Parent (see below)?
(1) Add a constructor to the Child class which takes an instance of itself as an argument.
(2) Add an OnDeserialized method to the Parent class which creates a New instance of the Child class based on the deserialzed instance of the Child class.
<OnDeserialized()>
Private Sub OnDeserializedMethod(ByVal Context As StreamingContext)
Child = New Child(Child)
End Sub
Now the Changed event is raised as expected.
how to serialize and deserialize an interface.
View 1 Repliesi have a xdocument.load(file) and after changing some values want to xdocument.save(file)
this save is not possible because file is in use ?
nattelip Private Sub savechfid_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles savechfid.Click
[Code]...
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.
View 6 RepliesComing up against a brick wall with sending items over the network using sockets. I'm using Chilkat rather than the built in TCP Client / listener but thats not the issue. From point a I send through a string converted to base64 as below
[Code]...
I am using the following methods to serialize objects into xml:
[Code]...
I am not seeing what I am doing wrong. To see what was being done, I changed the constructor values to "TEST", after the XML gets read in (I verified what the XML is), the class values are still stuck to "TEST". Any more Ideas? I am doing this process already in another class that works fine, neither me nor some co-workers could find the difference.[code]...
View 1 RepliesI have two rich text boxes, and two buttons on my screen. The first button grabs HTML from a URL and then converts the HTML to XML which resides in rich text box 1.
The second button is to grab the XML from the rich text box1 and then parse it to grab all the input elements by their ID.
My issue is that my parser isn't doing anything. My guess is that I'm not quite getting the XML from the first rich text box.
What would be the best way to grab the XML from a rich text box load it into memory and then parse the XML to grab all the ID tags?
Here is my code --
Imports mshtml
Imports System.Text
Imports System.Net
[Code].....
I have two rich text boxes, and two buttons on my screen. The first button grabs HTML from a URL and then converts the HTML to XML which resides in rich text box 1. The second button is to grab the XML from the rich text box1 and then parse it to grab all the input elements by their ID.
My issue is that my parser isn't doing anything. My guess is that I'm not quite getting the XML from the first rich text box.What would be the best way to grab the XML from a rich text box load it into memory and then parse the XML to grab all the ID tags?
[Code]...
I think that we can specify or import our properties that we wish to use in the project in the .vbproj file of our project.
And.. if so, how will I use these in my VB source code... ?
I want to keep the table names, connection strings, etc in the properties file.
I've wrote a program awhile ago that prints barcode labels. The old version needed the font to be installed in the fonts folder, but that made it a pain for people using the program for the first time, as the program would print the barcode label with a default font. If I load the font file directly and try and print, it just shows up with the default font, obviously not a barcode. The following doesn't seem to work:
[Code]...
I have ListBox with list of pdf files. On the side of windows form I have webbrowser control that shows selected in list pdf file, using Webbrowser1.navigate(path) method.I want to give to user option to delete selected file. When I try it using system.IO.File.Delete(filepath) method I am getting error: file is being used by another process. Delete works fine without Webbrowser preview,
View 5 RepliesI have my datagridview being loaded from a Text File and then being saved to a text file as a comma separated file - the commas obviously separate the columns. However in some of the cells prior to saving, I have data that i have inputted over two lines by pressing shift + return.
E.g.
"SOLD
10/05/2012"
This saves fine, but obviously shows up in the text file as a line break, which then causes some issues when I choose to re open the info back into DGV. How I can code so that it saves as a line break within a cell, rather than a completely new line.
I am having problems deserializing the response message I receive from the proxy class I created through WSDL.exe. I believe the problem lies in the fact that I am using XmlArrayItem, which has nested items within.Instead of getting:
<results xmlns="urn:partner.soap.company.com">
<result>
<created>false</created>[code].....
I have the following code, where I am trying to use returned JSON data, deserialize it, and return 1 part of that data back to the user.
<%@ Page Language="VB" Debug="True" EnableViewState="false" %>
<%@ Import Namespace="System.Web.Script.Serialization" %>
<script runat="server">
Class Item
Public Property some_number() As Double
[Code]...
I don't understand how to deserialize into the Item class, then how to get the data back out.
I created a VS2010 application that stores data in xml files with a custom extension (e.g. ".ABC") I would like to be able to open an .ABC file and have the application launch with the specific file's data loaded. This is analogous to opening a Word doc and having Word open with the doc loaded. I have searched for a while but can't even think of a phrase that explains this process. Nothing seems to match "You know . . . that thing that happens when you double click on a data file".
View 2 RepliesDeserialization Error when trying to view a form in design mode.Unable to load type [code]...
View 4 RepliesCan 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. ^.^
View 4 RepliesI am trying to decrypt a file and the decrypted contents will be loaded to a listbox.
Public Sub Decrypt(ByVal inName As String, ByVal outName As String)
Try
Dim array As Byte() = New Byte(&H1001 - 1) {}
Dim num2 As Long = 8
Dim stream2 As New FileStream(inName, FileMode.Open, FileAccess.Read)
[Code]...
I have a form with an Adobe PDF reader control. I point to a specific PDF I want to load when a button is clicked. The PDF is 28 Megs big and takes some time to load into the reader. I would like a progress bar to to show (like a showdialog kind of thing) so the user does not click all over the place and thinks the app is static.
The PDF reader is loaded like this:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.AxAcroPDF1.LoadFile("c:Section3.pdf")
End Sub
How would I update the progressbar1 control to reflect the time it takes to load? I checked the AxAcroPDFLib Namespace and found no "progresschange" type of functions or events.
I have no problem loading the contents of a text file into a richtextbox(rtb) with the below code. I can then edit and save the contents of the rtb to the file, and clear the rtb.
However, is the file still open? Does loading a text file into the rtb actually open that file? I am asking because I can't find any methods or techniques to close a file that has been loaded into a rtb. Is clearing the rtb the correct procedure?
Public Class Form1
Dim openFile1 As New OpenFileDialog()
Private Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click
[code].....
In my userform I have a WebBrowser control to load PDF files. I have added a FolderBrowserDialog to allow user selection of drives and or folders.
What I am trying to do now is after a file has been selected and viewed, the user may want to change drives and or folder locations. How do I remove the current contents of the WebBrowser control to be a blank screen (just like when the app starts, its blank).
When we use system.io.ReadLines the content of the file should not be loaded to memory right? say I want to create a function. The function accept a string, say "post.txt" where post.txt is a large file (3G) I want to put the first 100k line of post.txt on post.txt and the rest on reserve_post.txt
View 11 RepliesI am trying a simple object deserialization from an object encoded as a Base64 string, but I keep getting this weird error message. I've searched the forums for a solution but those who've experienced this all had different reasons for the error. The most logical solution, which is resetting the stream's position, did not work either. Here's my code:
Dim UnserializedObject As Object
Dim ser As New System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
Dim buffer As Byte()
[Code]....
I'm in the process of adapting a current program that I've created to automate it. **Current State***User selects an excel file and the contents are loaded into a DataGrid User can select which environment to run their query against (stage/prod) Program completes processing and updates datagrid with new values User can export datagrid to excel What I'd like to do is centralize the program on one computer and have it monitor a network folder for creation of a specific file type (*.xls or *.xlsx). If one of these is created in that folder then I want to add that file to a queue for processing. Once done processing I want to send the results as an attachment to an email to the user that created the file. After a file is processed I would like to remove it from that folder as well (into a diff folder of completed items).
[Code]...