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.'
Code:
private IActionService ActionService
{
get [code]...
How i can store value to ViewState?
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
{
set
{
ViewState["sTemp"] = value;
}
get
{
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
Page.Form.Controls.Add(hdnGuid);
}
//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;
else
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
else
{
//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("")))
sTemp.Enqueue(currentGuid.Guid);
System.Web.HttpContext.Current.Items.Add("IsRefresh", false);
}
p_tempQue = sTemp;
}
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 Repliescan we store viewstate other than in hidden field in asp.net
View 2 RepliesI 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 RepliesI'm trying to get asp.net to store viewstate in the session rather than bulking up the html.
Now i've read that asp.net 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]
i want to store IQueryable value to ViewState. my code is as below:
Private
Property _Query()
As IQueryable
Get
Return
CType(ViewState("_Query"), IQueryable)
End
Get
Set(ByVal value
As IQueryable)
ViewState("_Query") = value
End
Set
but when i run my page i get following error:
Type 'System.Data.Linq.DataQuery`1[[DynamicQueries.VW_EmployeeProfile_Filter, DynamicQueries, ersion=1.0.0.0, Culture=neutral, PublicKeyToken=null]]' in Assembly 'System.Data.Linq, Version=3.5.0.0, 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.
Why to Serialize an object to store in ViewState?
View 1 RepliesHow 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.?
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 RepliesI 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.
I've build a class like this:
[code]....
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.
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 RepliesI have a public property that I use to store a GUID in the viewState:
Property myGUID()
As
Guid
Get
Return
CType(Me.ViewState("myGUID"),
Guid)
End
Get
Set(ByVal
value As
Guid)
Me.ViewState("myGUID")
= value
End
Set
End
Property
I include this code on many pages in my website...is 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.
My code is:
[code]....
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?
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".
[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.
I have stumbled upon the issue when I need to retract html controls I've added client-side using JavaScript after the postback (due to server-side validation - this is not optional). I'm trying to achieve this is cr*p and there's a better way of doing this.
basically, what I'm doing is cloning a textbox control for up to 10 times on the page when the user hits "Add" and storing entered values from each of those texboxes in a hidden field to read from in the code behind. This works fine, however, when the server side validation doesn't pass after postback, all those dynamically added (cloned) texboxes disappear, since ViewState knows nothing about them.
I am considering 2 possible solution, both of which seem hacky:Rebuild all cloned textboxes on document onload() using stored values in the hidden field wrap the form in ajax update panel and place the cloned texboxes outside of it, thus, not refreshing this part of the screen on postback now, is it possible to somehow "update" ViewState to make it aware of all the html controls I've added using client-side script? I'd like to achieve this with client-side script, therefore not considering cloning textboxes on server-side,
How to maintain view state for the dynamically added html controls to a table using javascript(Below is the javascript which I am using to add HTML Controls Dynamically"). Because during the postbacks if I found any error while validating the data present in the dynamically added html controls, the controls are loosing their state and again I need to start adding rows and add data.
[Code]....
how could i store a Asp.net Application variable by javascript.
View 2 RepliesI have a text value of javascript and I want to store this value in a mysql database.
View 1 RepliesI have recently been using the title tag in various HTML elements to store data in JSON format in the DOM.
Is this a bad approach (I am assuming it is)? What is the correct way to accomplish this that works well with jQuery? By "works well" I mean
$("myButton").click(function (e) {
var myData;
eval("myData=" + $(this).attr("title"));
});
Works pretty well but again I am assuming there is a better way to do this no?
PS: BTW how does the title tag of HTML elements actually work? I cant seem to find where it actually ends up getting used?
PSS: Can I also get a jQuery based and Non jQuery response?
I'm working on a mapping application and will be allowing a user to make a query and have the resulting locations display on a map.I want the users to be able to interact with the map, but I need to know exactly which item they're interacting with, so it would be easiest if when the original query is made, the id's are put in a hidden field somewhere so I can just perform an insert statement based just on the key, rather than having to to another query to find out the key by saying "where location name is x and the coordinates are y, and the description is z" etc.Is this a bad idea, i.e. could anyone do any harm if they discovered that I was storing the primary key in a hidden field?
View 1 RepliesSo I have a dropdown setup on the page called ddlVehicleType that is populated from a store. This method gets called when another dropdown is changed, and it's supposed to remove all items from the aforementioned store, re-add them as needed, and then populate the dropdown with the new values. It's doing everything it's supposed to EXCEPT clearing the store before it re-adds the values, so the result is, when I switch, I'm getting what it used to be PLUS the new values that should be in there by themselves. Here is the weird thing though, when I switch back, the values are removed without re-adding anything. Can anyone tell me what I'm doing wrong? Method is below:
function filterVehicleTypes() {
var masterStore = Global.getComponent("vehicleTypeStore").getStore();
var Source = Global.getComponent("ddlValuationSource").getRawValue();
var isIncuded = '';
var IncludeFlags = '';
if (Source == undefined || Source == null)
Source = '';
Global.getComponent("ddlVehicleType").getStore().removeAll(false);
masterStore.each(function(rec) {
switch (Source.toUpperCase()) {
case 'KBB':
if (rec.get('Code') == 'KBB') {
Global.getComponent("ddlVehicleType").store.add(rec);
}
case 'NADA':
IncludeFlags = rec.get('MiscCode1');
if (IncludeFlags != null) {
isIncuded = IncludeFlags.substr(1, 1);
if (isIncuded == 'Y' && rec.get('Code') == 'NADA') {
Global.getComponent("ddlVehicleType").store.add(rec);
}
}
break;
default:
IncludeFlags = rec.get('MiscCode1');
if (IncludeFlags != null) {
isIncuded = IncludeFlags.substr(0, 1);
if (isIncuded == 'Y') {
Global.getComponent("ddlVehicleType").store.add(rec);
}
}
break;
}
});
}
I use Web Forms and Asp.Net with MS SQL.
For my Web Site I need store these codes belove, maybe others in future:
Google Analytic Code
Some JavaScript codes
HTML Footer and Header for my template.
I need a solution which could be centralized, use CACHE, easy to update:
01 Use a DATABASE with a Table (configure table) which for every records (VARCHAR) would allow storing of these spinets of code as string.
02 Use simple Text Files in a specific folder, so I can include these files in my code. I could update codes using FTP and NotePad (Here I am concern about cache).
03 Use Web.Conf file.
04 Use Text File and a Class wich would manage storing in cache the content of these file.
Where is the best place to store a javascript file in my website?
Should they be stored in the App_Code folder allong with C# files or should I create a dedicated folder in the root of the website? Or are there any other options?