Try Catch In .net - Deserialize An XML Object
Feb 3, 2012
I was searching the most effective and elegant way do to the follows:
My function can be called while Filename is valid, corrupted, not exist
The function will just deserialize an XML object.
The main possible results are:
OK
File doesn't exist
Error in XML file
If I write this way, the reader won't be closed in case of corrupted file. IF I write the reader.close() inside finally block, It gaves me a warning about using read before assigning it a value.
So, how can I solve this inside the sub?
Public Function DeSerializzaXML(ByVal FileName As String, ByRef tmpObj As Object, ByVal tmpClass As Type) As Boolean
Dim serializer As XmlSerializer
Dim reader As StreamReader
[CODE]...
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Sep 13, 2011
I'm having an issue with getting some of the values from with this json string:
{
"kind": "shopping#products",
"etag": ""YZWJaKE3MHROIW8rCIlu9mAACLM/6qxBB-GwuSPy5L3_zVS6sS2NYFI"",
"id": "tag:google.com,2010:shopping/products",
"selfLink": "https://www.googleapis.com/shopping/search/v1/public/products?country=US&
[code]....
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Feb 23, 2010
We are trying to consume WCF service which returns employee details in JSON Format.like:
{"d":[{"_type":"Employee:#","BigThumbNailURI":null,"ID":1,"Name":"E1"},{"_type":"Employee:#","BigThumbNailURI":null,"ID":2,"Name":"E1"}]}
From VB.net code behind when I am trying to deserialize it it's stating that "Expecting state 'Element'.. Encountered 'Text' with name '', namespace ''."
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Oct 29, 2010
How do you deserialized a serialized object?I'm trying to extract the serials of fingerprint template which will be stored to the database. Here is my
Dim features As DPFP.FeatureSet = ExtractFeatures(Sample, DPFP.Processing.DataPurpose.Enrollment) <--- Serialized Object
And here is my sad failure attemp:
SetText(String.Format("Stat: {0}", features.DeSerialize(WHAT SHOULD I PUT IN HERE????)))
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Mar 24, 2011
In VB.Net class, I have a JSON data as string. I want to convert them to LINQ class Object.[code]....
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May 10, 2011
I've written a custom class MyClass and marked it with the <Serializable()> attribute. I have a set of binary files on my hard drive that I've serialized using BinaryFormatter that came from instances of MyClass.
I've recently changed the structure of MyClass slightly (added some properties, deleted some properties, changed a few methods, etc).
What happens when I try to deserialize the existing objects to this changed class using the code below? I've tried it and not had an error thrown or anything - but surely it can't deserialize properly when the class has changed? Is there a way I can get some useful information out of the serialized files even though I've updated the class?
Here's the code I'm using to do the serialization:
Public Sub serializeObject(ByVal obj As Object, ByVal outFilename As String)
Dim fStream As FileStream
Try
[Code]....
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Aug 10, 2010
I'm getting 'Catch' cannot catch type 'Object' because it is not 'System.Exception' or a class that inherits from 'System.Exception'. and 'Expression detected' Code underlined in blue: Catch obj1 As Object When (?)
Private Sub OpenJAMem()
Dim num3 As Integer
Try
[code]....
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Feb 5, 2010
a) If the function returns true OR false will utilising the 'Using/End Using connection' statement close the connection cleanly? b) Is the 'Return TRUE statement' suitable placed to allow an error to occur and be raised returning a value of FALSE?
Public function doSomething () as boolean
Using conn As New SqlConnection(My.Settings.SQLConn)
Try
[code].....
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Jun 7, 2012
So basically I have a ComboBox on a form, which I populated by adding custom object named "Category" and by setting the DisplayMember to the property "Name" of my object.On another form that can be opened at the same time, I can edit the name of theses "Category" objects. I raise an Event, "NameChanged" but how can I catch it on the form which contains the ComboBox? Even if the property "Name" of the object "Category" change, the display on the ComboBox doesn't autoupdate. So I need to catch the event, but I don't know how to do it.
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May 15, 2012
I was wondering i have a try block setup but need to catch an object exists error so I can continue in my code and ignore that user because she/he exists already in another ou.Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - "Sherlock holmes" "speak softly and carry a big stick" - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to[url]...
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Mar 25, 2011
I have a program in VB.Net that receives mails from Outlook, extracts attachments and inserts the attachments into a table through a query. I would like to put the query/queries in a Try/Catch block, but cannot do so as Outlook exceptions cannot be caught, and it gives me an error, and unless I put a very specific exception, I cannot catch it. Is there a workaround?
Edit:
Try
Catch ex As Exception
End Try
Exception is underlined and when I hover on it, it says: "Catch cannot catch type 'Microsoft.Office.Interop.Outlook.Exception' because it is not in 'System.Exception' or a class that inherits from 'System.Exception'". This is affecting all my other code which I'd like to put into a Try/Catch block.
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Jun 19, 2012
The following code causes a "Warning" that Variable is used before value assigned.How do I restructure this Try/catch to eliminate error on the myreader.close command in the Catch part? Code appears to work fine but I dont like Warnings. [code]
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Apr 1, 2011
i have problem when i click a ADD button, there is one null value in the textbox .. so the try catch statemnt is to catch that null value error but after that the catch is success but the button click never stop excute the statemnt till the end of the button event.
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Mar 4, 2009
I have this scenario: in a Sub I have a Try...Catch statement.Within that Try..Catch I call another sub.In that 2nd sub is also a Try...Catch.(see below for example).Now if an exception occurs in the 2nd sub's Try...Catch, which Catch gets excecuted? The 2nd one, the 1st one or both?
Private Sub sub1()
Try
..do stuff[code].....
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Jun 2, 2009
If I throw an exception from within a catch, does the finally (from the catch) still execute? i.e.
Try
..some code with an exception in it...
catch ex as Exception
throw new SpecialException("blah blah" & ex.Message, ex)
[code]....
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Jan 23, 2012
I need to catch log4net exceptions (its own exceptions not app exceptions logged by it). I wish there's a way of doing it this way: [code] I have this code implemented and there's no errors in compilation but i force log4net to have an error (pointing to a non existing database in the config file) and nothing is threw.I've tried the listener aproach: [code] and it's writing the errors to log4net.txt, the forced ones i mean.This last aproach has a couple of drawbacks: it won't append every error to the file, if the error is the same it doesn't write it, i can't get the listener to write every error to that file, only one (I don't know how to fully configure the trace listener, it might be that). Thus it won't append the date and hour to every line wich is a necesity for me. Finally i can't give structure to it (xml). Even if the listener work i need to use the try/catch aproach, since i'm using ExceptionHandling from Enterprise library to log the errors in my app.
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Feb 12, 2010
I am using VB.NET 2005 to create a Windows forms application. I have a procedure named SendMail that creates an instance of Outlook.Application, to send an email from my application. I found the code on this forum, I think.The procedure works fine, but I can't use error handling with it.I call the procedure from a button click event. I put the procedure call in a try/catch block, and the application won't build, with the following error.
Error 68 'Catch' cannot catch type 'Microsoft.Office.Interop.Outlook.Exception' because it is not 'System.Exception' or a class that inherits from 'System.Exception'. C:datadevdmtiQTSQTSv7_1_20100212wQTSQTSReportsCriteria
pt_frmReportViewer.vb 43 21 QTS
Here is the code:
Sub SendMail(ByVal sFile As String)
' Create an Outlook application.
Dim oApp As Outlook._Application
[code]....
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Dec 17, 2010
I can't find any example about how to deserialize AMF in vb.net. I found one in C# but i don't know how to make it working for VB. Someone is able to show me an example of parsing AMF, simple client?
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Jan 13, 2011
I am trying to read in an XML document, add a record with a tag for the filename and write to a different XML document.I have been told I must use serialization.
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Nov 3, 2011
HTML Dim Geocache As FileStream = New FileStream("c:emps.gpx", FileMode.Open)Dim serialize As XmlSerializer = New XmlSerializer(GetType(Cache_Location))Dim myLocation As Cache_Location = New Cache_Location
[Code]....
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Jun 29, 2012
Ok, so I'm playing with some FTP profile files that are written in XML. I'm trying to get the program to be able to read the current users settings and fill in or remove servers they do or don't have access to. So the XML looks like
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<ftp>
<servers>
[code].....
it's probably more cosmetic than anything but the logic just doesn't flow to look over 'server' and not 'servers'?!
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Apr 16, 2012
I have a project converted from Visual Studio 2005 to Visual Studio 2010. It compiles and runs.
When I prune "unused references's from this project as listed by Visual Studio, the project fails to compile with the subject error message.
In particular one of the "unused refererences" is to "Microsoft.VisualBasic.dll". The IDE does not allow me to add back this particular reference.
What do I need to add back as a referenceto get this items?
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Apr 20, 2010
A few weeks back in reply to a thread, I said then that it's sometimes worse to use a Try/Catch when there's nothing in the Catch!There are exceptions to that I'm sure, but too often the Try/Catch is used with a blank Catch that makes even the developer scratch their heads when the program crashes because they have nothing to go on (by their own doing).DevExpress (and I'm a big fan of their stuff) has a little three minute video that encapsulates that concept well and I thought that you all might enjoy watching it:[URL]
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Feb 25, 2012
I am trying to deserialize a JSON string using VB.net and cannot seem to pull the values out of the finished List.[code]I am told "Index was out of range. Must be non-negative and less than the size of the collection."
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Mar 18, 2011
I'm new to VB and trying to write a webservice that exports and imports JSON.I'm using JSON.NET 3.5 and can serialize fine:My Token class is:
<DataContract()> _
Public Class Token
<DataMember()> _
Public TokenID As String
<DataMember()> _
Public Issued As Date
[Code]...
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Mar 31, 2009
I have an XML document that I am deserializing (VB .NET 3.5 Framework), changing some values, and the serializing again. The original document has several XML Comments in it. When I go through all the deserialize/serialize all of the comments are lost. Is there a way to preserve the comments? If not, is there a way to add comments on serialization without having to walk through with the writer and manually add all of the comments back in the appropriate place?
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May 26, 2011
I am trying to deserialize my data and I keep getting an error.I'm hoping for any ideas of what could be the problem.My code in Visual Basic Express 2010:Imports System.Xml.Serialization
Imports Systm.IO
Public Class Form1
Structure gro
[code]....
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Feb 13, 2012
For recent checkins it is pretty straightforward:
Dim UserSelfCheckins As FourSquare.UserSelfCheckins.Root
Dim ser As New JavaScriptSerializer()
UserSelfCheckins = ser.Deserialize(Of FourSquare.UserSelfCheckins.Root)(jsonstring)
[Code]...
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Feb 1, 2011
I have a json array which is formatted as follows:
[Code]...
How can I deserialize this in such a way that I can have a list of objects indexed by property? Meaning, I want to be able to access the data like this: MyList(96).lastproperty or MyList(96).listofstuff.yetanother and have it return the proper datatype too? Is that even possible in vb.net?
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Nov 14, 2011
I've the following JSON string to deserialize:
[{"application_id":"1","application_package":"abc"},{"application_id":"2","application_package":"xyz"}]
I'm using DataContractJsonSerializer method. It is made up of array of items and I couldn't find an example using VB.Net that can deserialize this structure. I have the following Application class to store this information:
<DataContract(Namespace:="")> _
Public Class ApplicationItem
<DataMember(Name:="application_id")>
[Code] .....
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