Learn how to change an HTML element attribute value with JavaScript. Just as a thought it may be a limitation of the listbox server control try using a listbox HTML control and add runat=server to make it accessable in codebehind. 0. Or you could submit an event or a user group in your area. Explain how to access Viewstate values of this page in the next page?-PreviousPage property is set to the page property of the nest page to get the value of viewstate for the page in the next page. The value property contains the default value OR the value a user types in (or a value set by a script). The values are then passed as a variable to a hidden … Changing the viewstate won't do, because ASP.NET is actually using viewstate to restore the listbox condition. The part that Viewstate plays in the sample page above is easily examined using Fritz Onion's ViewStateDecoder tool (which no longer seems available), but a web search of ViewState Decoder will help you find up to date alternatives. Also you can compress javascript and Remember to put RUNAT=SERVER attribute so that you can reference your input from your ASP.NET code behind. get { return ViewState ("PropertyName"); } set { ViewState ("PropertyName") = value; } } assign a value to the property and then get the value in javascript using this: javascript. A commonplace to see that would be in your menu/navigation bar: < Here Mudassar Ahmed Khan has explained with an example, how to persist the variables created in JavaScript code across PostBacks in ASP.Net using C# and VB.Net. As long as you grab the old value before Page.SaveViewState, you are fine. Syntax and Try Online Examples are provided to get hands on. TAGs: ASP.Net, JavaScript, Arrays, Form ViewState["Name"] = "This is ViewState value"; Page.ClientScript.RegisterHiddenField("hf1", ViewState["Name"]); Javascript: I have a workaround to this, but not so elegant. The httpcontext.current.session object (to hold a value or a bolded, italicized column). Put the ViewState's value in a hidden field and read the hidden field value in client-side. The value property contains the default value, the value a user types or a value set by a script. We must give [Serializable] On the top line of declaring a class that needs to assign in ViewState. ProdCodeSelList.Items.Add(ProdCodeSelectedList.Items[j]); ProdCodeSelectedList.Items.Add(ProdCodeSelList.Items[j]); hi,       thnks for the reply, but this adds up to unecessary wrk. 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. When the "Javascript Change" button is clicked, the client-side script alters the Text values of both Label1 and TextBox1. These values are managed and restored purely by the LoadPostData method in controls implementing the IPostBackDataHandler interface. You can test this by removing the Text value of Button1 from the aspx, and setting it in Page_Load to "Button". View State is turned on by default and normally serializes the data in every control on the page regardless of whether it is actually used … That is because the viewstate is now stored in the session state. 1. Aspx Never have been. Manually assigning the value in Page_Load doesn't change this behavior. (Can’t access it.) There is a common misconception that form values are managed by ViewState. is it tht the view state is not affected if u change any state using javascript??? Here I will explain what is viewstate and uses of viewstate with example in asp.net using c# and vb.net. The reason why Label1 is incuded in ViewState, but Label2 is not is because Label2's Text value was set in the aspx - at Page Initialisation. Is it possible to use a multiline textbox instead? It was subsequently programmatically changed in Page_Load to "Original Label ". Even if you are using regular HTML control, you still need to convert it to become a "server control" (RUNAT = SERVER). 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