How To Store A Byte[] List In Viewstate

Feb 6, 2011

I want to store some byte[] to ViewState. For example I want to store a list of FileBytes. How can I do it?

View 1 Replies

Similar Messages:

Mobiles :: Convert String To Byte (not Byte Array) And Store On RFID Tag?

May 8, 2010

I am develping an application that integrates with an RFID kit. The problem is, the kit comes with an .cs class that accepts data stored in a byte array however, each information stored in the array respresents an int. I wanted to store String information in each array but, my research suggest that a String itself can be converted to a byte array and not a the code from the .cs class:

byte BlockNo = 0;
byte[] BlockData = new byte[16];
byte ReturnCode = 0;

Each t_b*.text respresents an int. Is there a way I can stored a String in a single byte block?

View 1 Replies

State Management :: How To Store List In ViewState

May 27, 2010

I want to store List<Class> object to ViewState, when i try to do this than its giving me error to make class serialize,but my class is partial class so didn't get serialize keyword on class how can i store List object to viewstate.

View 4 Replies

Architecture :: Store The Image Into Sql Server As A Byte Array?

Mar 21, 2011

Is it better to store the image into sql server as a byte array or store the image's location to sql server and the image to the server?

View 2 Replies

Javascript - How To Store Value To ViewState

Jan 26, 2011

I can tried save some data to ViewState, but i get this Error:

Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Error serializing value 'HeRMeSSAAS.BussinesProcess.BussinesServices.CandidateService' of type 'HeRMeSSAAS.BussinesProcess.BussinesServices.CandidateService.'

private IActionService ActionService
get [code]...
How i can store value to ViewState?

View 2 Replies

C# - Store A Queue In Viewstate?

Apr 29, 2010

EDIT: ViewState does not change when browser is refreshed, so even if you write to viewstate it will not save the data. i am trying to store a Queue in a viewstate (to track postbacks and refreshes to stop a form from resubmitting). The Queue is only saving with a count of 1 (the first item that is added to it) no matter how many items i add.

// New Queue of strings
private Queue<string> sTemp;
private Queue<string> p_tempQue
ViewState["sTemp"] = value;
return (Queue<string>)ViewState["sTemp"];
//BasePage constructor
public BasePage()
//create a Queue of string
//sTemp = new Queue<string>();
this.Load += new EventHandler(this.Page_Load);
this.Init += new EventHandler(this.Page_Init);
//In the 'page_Init' event we have created a simple hidden field by name 'hdnGuid' which is attached to the page on the first hit itself.
protected void Page_Init(object sender, EventArgs e)
//initializing the hidden field
//create a hidden field with a ID
HiddenField hdnGuid = new HiddenField();
hdnGuid.ID = "hdnGuid";
//if it is the first time the page is loaded, create a new guid and assign it as the hidden field value
if (!Page.IsPostBack)
hdnGuid.Value = Guid.NewGuid().ToString();
//add the hidden field to the page
//In the 'page_Load' event we check if the hidden field value is same as the old value. In case the value is not same that means it's a 'postback'
//and if the value is same then its 'refresh'. As per situation we set the 'httpContent.Items["Refresh"]' value.
protected void Page_Load(object sender, EventArgs e)
if(p_tempQue != null)
sTemp = p_tempQue;
sTemp = new Queue<string>();
//The hdnGuid will be set the first time page is loaded, else the hdnGuid
//will be set after each time the form is submitted using javascript.
//assign the hidden field currently on the page for manipulation
HiddenField h1 = (HiddenField)(Page.Form.FindControl("hdnGuid"));
//create an instance of the GuidClass
GuidClass currentGuid = new GuidClass();
//set the GuidClass Guid property to the value of the hidden field
currentGuid.Guid = h1.Value;
//check to see if the Queue of strings contains the string which is the current Guid property of the GuidClass
//if the are equal, then the page was refreshed
if (sTemp.Contains<string>(currentGuid.Guid))
//adds item as key/value pair to share data between an System.Web.IHttpModule interface and an System.Web.IHttpHandler interface during an HTTP request.
System.Web.HttpContext.Current.Items.Add("IsRefresh", true);
//if they are not requal, the page is not refreshed
//if the current Guid property in the GuidClass is not null or not an empty string
//add the new Guid to the Queue
if (!(currentGuid.Guid.Equals(null) || currentGuid.Guid.Equals("")))
System.Web.HttpContext.Current.Items.Add("IsRefresh", false);
p_tempQue = sTemp;

View 3 Replies

How To Store And Retriew Xls File Into Sql Database In The Form Form Of Byte[] Using C# In Web Application

Jul 9, 2010

how to store into sql data base and and how to retriew xls file as xls file from database in the form form of byte[] using c# in application.

View 1 Replies

Store Viewstate Other Than In Hidden Field

Jan 30, 2010

can we store viewstate other than in hidden field in

View 2 Replies

C# - Store Viewstate In The Session Rather Than Bulking Up The HTML

Jan 7, 2011

I'm trying to get to store viewstate in the session rather than bulking up the html.

Now i've read that comes with the SessionPageStatePersister which can be used instead of the default HiddenFieldPageStatePersister to do this. I was wondering how i go about dropping it in?

This is what i've got so far:

I think i need to create a PageAdapter that returns a SessionPageStatePersister from its GetStatePersister method, and somehow get the page to use this pageadapter. But Page.PageAdapter only has a getter, so i'm not sure how you set it.

See the 'remarks' heading here: [URL]

View 3 Replies

State Management :: How To Store IQueryable Value In ViewState

Jan 3, 2011

i want to store IQueryable value to ViewState. my code is as below:

Property _Query()
As IQueryable
CType(ViewState("_Query"), IQueryable)
Set(ByVal value
As IQueryable)
ViewState("_Query") = value

but when i run my page i get following error:

Type 'System.Data.Linq.DataQuery`1[[DynamicQueries.VW_EmployeeProfile_Filter, DynamicQueries, ersion=, Culture=neutral, PublicKeyToken=null]]' in Assembly 'System.Data.Linq, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable

what should i do to get rid of this error. previously i was doing like this:

Private Shared _Query As IQueryable

but problem is that in Multi users environament, Shared variable is making problem, that is why i want to store it in ViewState.

View 4 Replies

Configuration :: Serialize An Object To Store In ViewState?

Aug 6, 2010

Why to Serialize an object to store in ViewState?

View 1 Replies

Web Forms :: How To Store Multi Dimensional Array To Viewstate?

Oct 8, 2010

How do you store multi-dimensional array to viewstate? Here's what I did:
public bool[,,] regsettings = new bool[7,5,4];
bool[,,] regsettings = (bool[,,])ViewState["regsettings"]; // this line works!
regsettings[i,j,tab] = (bool)ViewState["regsettings"]; // this line no working?! The error is: Object reference not set to an instance of an object. The letters i,j, tab are just variables in the loop. They are there. I also tried: (bool[,,,]) as a cast and it is a no-go either.?

View 1 Replies

To Store Credit Card And Pricing Information In ViewState Even Over Ssl?

Jul 7, 2010

The Title pretty much says it all but to clarify more I have a page with private properties that are storing a credit card object and a shopping cart object in viewstate so I can maintain a reference to them across postbacks. BTW the page involved will be using ssl. Is this safe?

View 6 Replies

Where Should Store A Data Table ViewState/ Session/ Cache

Apr 21, 2010

I have a DataTable with about 10,000 rows in it.

I would like to store this data once for aspx page. When the user selects different options in the page, data is further selected from the already stored DataTable.

I tried using the ViewState, but as soon as the data grows beyond 100 rows, performance degrades.

View 1 Replies

Postback - Store Object Class In Viewstate (or Other Ideas)

Sep 8, 2010

I've build a class like this:


The values of this class are set at postback by clicking a radiobutton list. Problem however is I don't know how to save this values across multiple postbacks. I thought of using viewstate but I'm not quite sure how to do it with this class.

Maybe I'm missing some important thing here.

Hope someone can point me in the right direction.

View 4 Replies

State Management :: Store Viewstate Values In Another Methods?

Apr 14, 2010

In my website the page viewstate values in hidden are very large.So i wish to store this values into another methods(session,files etc).so please advice me to some methods..

View 3 Replies

State Management :: Common Function To Retrieve / Store To Viewstate?

May 15, 2010

I have a public property that I use to store a GUID in the viewState:

Property myGUID()
value As
= value

I include this code on many pages in my there any way to migrate this to a common code file, so I don't have to repeat it on each page? If I try to add it to a class file, the "Me" part of course is out of scope.

View 4 Replies

C# - How To Store An Array In A ViewState Error / Unable To Cast Object

Feb 6, 2011

My code is:


When I run the program, an error occurs:

Unable to cast object of type 'System.Collections.Generic.List`1[System.Int32]' to type System.Int32[]'.

Why does this error occur?

View 2 Replies

State Management :: Store Viewstate In Session ( Framework 3.5, VS 2008 )?

Nov 9, 2010

I need to store viewstate in session to optimize my page performance on postback.

I am developing ASP.Net Website, using Visual Studio 2008.

I created a class named "BasePage" under "App_Code".


Now, I know if I inherit this class in all of my pages, that will work but I am looking to do this through Config file.

Is there any way that I can write something in Config file to use this class for all the pages?

so that if I want to remove, I can simply remove from config file and I do not need to compile my whole project again.

View 4 Replies

Byte B = (byte)(lstEndPoints[0]); //Error Cannot Convert

Jan 24, 2010

ArrayList lstEndPoints

0 element "0x01"
1 element "0x82"
byte b = (byte)(lstEndPoints[0]); //Error cannot convert

View 7 Replies

DataSource Controls :: "Fail To Convert Byte To Byte[]" When Storing Image To Database

Apr 3, 2010

Not sure if this is the correct section to ask this but this is regarding storing datatype trying to convert an image file retrieve from a folder and convert it to Byte so that i can save into database

In below function i retrieve and convert the image from a folder to byte


Then i set ImageUrl in PageLoad

My image datatype in database is image

View 1 Replies

Web Forms :: How To Checkbox List Viewstate

Jan 2, 2011

I have a CheckBoxList (CBL) control inside a gridview. The CBL viewstate is enabled and I populate the CBL items from a session variable with the following code


How can I maintain (save) the user CBL selection while postback ?

View 1 Replies

Disabling Viewstate On Drop Down List Causes?

Sep 13, 2010

I have a page that has two drop down lists on it and a button. All controls sit in an update panel. The first drop down list (ddl1) contains a lot of values which caused a huge viewstate so I disabled viewstate on it. In the page oninit event I populate the drop down list every time the page is posted back. This all seems to work fine, it shows all the values and I can access the selected value in my event handler.

ddl1 has the autopostback attribute set to true so when its value changes the second drop down list (ddl2) is populated with some values that depend on the selection in ddl1. This also works fine, the values in ddl2 change when I select a value in ddl1.

ddl2 does not have viewstate disabled. The button that sits under my two drop down lists is disabled by default and becomes enabled when the value of ddl2 is changed to anything except string.empty. This is where I run into problems. ddl2 does an autopostback too but it seems to lose the selected index/value. When I'm in my code to check whether to enable or disable the button the selected index is always 0 and the selected value is string.Empty.

If I enable viewstate on ddl1 this all works fine. Could anyone point me to what I'm doing wrong?

Here is the code executed by the ddl2 postback:


View 1 Replies

State Management :: How To Convert Viewstate To List

Jan 31, 2011

I stored a list<mytype> object in a viewstate. Type of list<mytype> comes from a public structure which is defined at page.

When I try to convert viewstate to a list<mytype> object it cause error.

Public struct mytype
{ list<mytype> obj = new list<mytype>();
list<mytype> tempobj = new list<mytype>();
tempobj = (list<mytype>)viewstate["mystate"];// this line cause error !

View 5 Replies

Web Forms :: Radiobutton List When Viewstate Disabled?

Oct 18, 2010

I am having an issue with dropdown list when viewstate is disabled. The selectedindexchanged event fires even for the other events on the page.

I am pasting the code bello. To reproduce the issues I am mentioning change the selected value of the dropdownlist and then click any button the selected indexchanged event fires even thought we didnot change the value.


View 1 Replies

Copyrights 2005-15, All rights reserved