Make A MVC 2 Json Serializable Structure With Apropriate PK Array Keys?
Jan 1, 2010
I have a table with a Int PK column and a name. I want to load them into an object of some sort and return them using Json() ActionResult in MVC 2. I am having a hard time finding a built-in structure that is supported for serialization that keeps a simple key/value structure in tact.
Ultimately I would like to do something like:
Function JsonList() As ActionResult
Dim Things = New Dictionary(Of Integer, String)
[code].....
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Feb 17, 2010
I have a serializable class and structure I created for an ArrayList to be access within a Web Application. The problem I am having is the count comes back as zero after calling New. I debugged the code and the Arrylist is being populated
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Mar 10, 2011
Is there any way to make an array structure a part of a condition?[code]...
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Jul 17, 2011
How can I convert a JSON string to an array OR a JSON string to XML in VB.NET? I know how to do this in C#, as I have read dozens of articles on it, however, I am unable to figure out how to achieve the same result in VB.NET.
I'm using the System.Web.Script namespace via System.Web.Extensions.dll (from Microsoft).
I'm willing to use an additional DLL file if needed.
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Mar 9, 2011
I am trying to figure out a class/struture to handle the following JSON format:
{
"ReturnData": [
{
"id": "msg2DoesNotExistName",
[Code]......
I may or may not have Data for ReturnData and SetValue (one or both at a minimum). I am trying to let the serializer handle most of the formatting without having to check for empty sections and single-item arrays.
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Aug 21, 2010
I am wondering whether I can use DataContractJsonSerializer to serialize a Structure type, or does it have to be a reference/Class type? I have the following code:
<Extension()> Public Function ToJSON(ByVal target As Object) As String
Dim serializer = New System.Runtime.Serialization.Json.DataContractJsonSerializer(target.GetType)
Using ms As MemoryStream = New MemoryStream()
serializer.WriteObject(ms, target)
ms.Flush()
[Code]...
And yet if I call it on a Structure type, such as a KeyValuePair(Of T1, T2), I get the following error:
Public member 'ToJSON' on type 'KeyValuePair(Of String,Object)' not found.
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Dec 10, 2011
I'm trying to return code like this (can be found here):
{"hotspots": [{
"id": "test_1",
"anchor": { "geolocation": { "lat": 52.3729, "lon": 4.93 } },
[code].....
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Mar 22, 2012
Having to update somebody else's code. Did I do this correct for the code below?
[Code]...
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Aug 29, 2009
I am trying to communicate with an external device and i am trying to send a byte array to the external device via sockets but i am always getting a response the message size is too small so i am not sure what i have done wrong. Between the data type there should be no alignment present and all numbers are represented in little endian format. The char array is not null terminated as mentioned in the protocol specifications.
I have to send data based on a struct that embeds 2 other struct. So here's my vb.net code for the struct used to convert to byte array and the sending part.
Public Structure MESSAGETYPE_OIP_Login
Dim Header() As COMMANDHEADER
Dim UserName() As PSTRING
[Code]....
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May 23, 2010
I want to make a structure within a structure. Basically it will appear like this:
Structure ID
dim CardType as string
im CardCode as string
[code]......
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Oct 12, 2010
In Vb.net I am trying to assign an array of structure to another array of same structure[code]...
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Jun 23, 2011
I have the following code which serialize an array to json:
Dim col1 As New ArrayList
Dim col2 As New ArrayList
objJSONStringBuilder = New StringBuilder()
objSQLConnection = New SqlConnection(System.Configuration.ConfigurationManager.AppSettings("connString"))
objSQLCommand = New SqlCommand("select col1, col2 from table1", objSQLConnection)
objSQLCommand.Connection.Open()
[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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Feb 23, 2009
I need to pass back a JSON result for a routine I am working with. How can I encode an Array I created to JSON? I am writing this in VB.net
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May 6, 2011
I'm trying to parse this array using JSON.NET
[Code]...
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Jun 19, 2009
I'm trying to sort an array based on a structure but whenever I do this, it basically erases all the data in the entire array.I have verified that the array is populated correctly, it is when using array.sort that everything returns blank.
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Mar 5, 2012
How to create this JSON array using vb.net array [code]...
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Feb 16, 2010
I'm having problems deserializing some json data, getting InvalidCastExceptions and the like.
Can anyone point me in the right direction?
Here's the json i'm wanting to deserialize;
[{"OrderId":0,"Name":"Summary","MaxLen":"200"},{"OrderId":1,"Name":"Details","MaxLen":"0"}]
Here's my code;
[Code]...
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Mar 28, 2011
I have "Form Designer" web application, in which I need to post the controls of the new form to an ASP.Net page to insert to DB, each time I create form control. I push it into two dimensional array, when user click save, this array will be serialized and sent to Server Page using Ajax.
Array string After Serialization Looks Like :
[
[
[code].....
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Feb 3, 2012
I am attempting to deserialize a simple JSON array to .NET objects using the JSON.NET library in visual basic.
For the life of me, I cannot figure out what I am doing wrong here. My JSON string deserializes into appropriate objects (9 in total), but none of the properties are populated.
My code:
Public Class result
Public Property id As Integer
Public Property vote_percentage As String
[Code]....
When using JSON.NET you have to have constructor methods (i.e. Sub New) in order for the properties to get set during the Deserialization call.
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Jul 6, 2010
I'm using a web service programmed in Visual Basic .NET 3.5 to receive a JSON Array sent from other application.
I'm sending a JSON string like this one:
[{"idRecoleccion":1,"PIN":"553648138"},{"idRecoleccion":2,"PIN":"553648138"}]
And I'm receiving the code in Visual Basic .NET as follows:
[code]...
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May 27, 2010
I'm having problems with marshaling in VB.NET to C++, here's the code :
In the C++ DLL :
struct APP_PARAM
{
[code].....
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Jan 6, 2011
I have worked out how to pass my custom objects into ASP.Net json webservices. Works a charm. Problem I am having is passing in straight arrays of my custom objects or alternatively passing in arrays that are parameters of my custom objects. So for example...
Public Class WebService1
Inherits System.Web.Services.WebService
<WebMethod()> _
[code]....
Fails with error: The value "System.Collections.Generic.Dictionary`2[System.String,System.Object]" is not of type "WebApplication1.WebService1+Person" and cannot be used in this generic collection. Parameter name: value
So how do I explain to ASP.net that it is infact an array of Person? note: That changing the function to as List(of Person) or ArrayList does work but given that I implement my own custom collections this is not optimal for me.
UPDATE: Ok so what I have worked out so far is that this problem is definitely associated with how the JavascriptSerializer uses the SimpleTypeResolver to resolve types. Basically if I do something like this
Public Function AddPersonList(ByVal PersonList As String) As PersonList
I can recreate the error using the following code.
Dim PersonList As PersonList = jsonSerializer.Deserialize(Of PersonList)(PList)
However when I provide my own custom type resolver along the lines of
Dim jsonSerializer As New JavaScriptSerializer(New MyCustomTypeResolver)
I can successfully create an instance of my custom list.Now I have worked out how to provide my own custom convertor in the web.config file. Along the lines of this....
<system.web.extensions>
<scripting>
<webServices>
[code]....
PSS: I have tried to use the assembly fully qualified name as specified in the docs for the SimpleTypeResolver (SimpleTypeResolver MSDN) but this throws a "Operation is not valid due to the current state of the object." exception - which is an error caused when the TypeResolver cannot resolve the name?
My problem was never passing in a List(of Object) into my webservice (I simply posed the question as such to simplify it for stackoverflow). In such a case I would be willing to completely accept using a Generic List(of) but my problem was actually that one of my custom objects implemented a property with a strong typed List(of) so for example:
Customer {CustomerID AS Guid, FirstName AS String, LastName AS String, EmailAddresses AS EmailAddressList}
which now needs to be changed to
Customer {CustomerID AS Guid, FirstName AS String, LastName AS String, EmailAddresses AS List(Of EmailAddress)}
This is admittedly not the end of the world and is probably better in the webservice context (as you have suggested) but definitely a detriment when it comes to internal application usage of my Collection properties. What this means is that once I have this property I either need to cast it to my CustomCollectionList every time I want to use some advanced feature or I need to implement another property which exposes the CustomCollectionList.
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Dec 4, 2011
I am trying to deserialize a JSON string that looks like so: {'type':'clientlist','client_list':[]} I am using JavaScriptSerializer() to do it. For some reason the JavaScriptSerializer() is choking on the member 'client_list'. It doesn't give very good info. The error it gives is:
[Code]...
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Dec 2, 2009
Here's the data I'm trying to work with
Spark Plugs
column 1: PR214,PR223,PR224,PR246,PR247,PR248,PR324,PR326,PR444
Brands:
column 2: MR43T,R43,R43N,R46N,R46TS,R46TX,S46,SR46E,47L
column 3: RBL8,RJ6,RN4,RN8,RBL17Y,RBL12-6,J11,XEJ8,H12
column 4L 14K22,14K24,14K30,14K32,14K33,14K35,14K38,14K40,14K44
Here is what i came up with for my code so far
Public Class frmMain
Private strSpark() As String = {"PR214","PR223","PR224","PR246","PR247","PR248","PR324", "PR326","PR444"}
Private strBrands As String(,) = { { } }
End Class
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Oct 24, 2011
I'm trying to create this JSON string but having problem creating it.I'm getting System.NullReferenceException error.Here is the json string that I would like to create{"id":["1","2","3","4"]},"sid":["s1","s2","s3","s4"]}Here is the code I have so far.
Imports System.Web.Services
Imports System.Data
Partial Class test_sidetab
[code].....
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Nov 17, 2011
I was using a JSON MAKER class to make a JSON string to send off from my webservice - it was way too slow - so I thought I would do the string manipulation right in the recordset loop - how could I go wrong - it is only 1141 records![code]...
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May 9, 2012
I am been stuck on this for 3 days now...I have been accessing the twitter api to pull a user_timeline for a list of users and the json that comes back is impossible to work with. I tried to deserialize it using javascriptserializer and get an error:invalid object passed in , ':' or '}'
Now this is frustrating since I expect the json being returned to be error free. Then I tried json.net and split the posts using string.split and tried to convert each post to Jobject or jarray. for Jarray I get
'unexpected end of content while loading jArray
[Code]...
Now I have formatted the code here and not pasted the whole file but it does look like valid json to me and I do not alter anything after receiving the stream from the twitter api. Can someone please point me in the right direction? I really need to get this stuff parsed?
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Feb 21, 2011
I'm strugling the whole day with the next JSON string
{
"0":{"link":"afbeeldingenplaatje1.jpg"},
"1":{"link":"afbeeldingenplaatje2.jpg"},
"2":{"link":"afbeeldingenplaatje3.jpg"}
}
How can i deserialize this? What's wrong with the next code (vb.net)
Public Class DataString
Private m_link As String
Public Property link() As String
Get
[CODE]...
It returns always an empty result.
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Jul 28, 2011
how to receive and send back json. Hope someone can help me on this. I understand by examples.
On my clientside, I am sending a ajax json string "name":"theName" to the server side and would like the server side to return a string saying "welcome &name ".
Client-side code
<!DOCTYPE html>
<html>
[Code]....
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