I'm trying to retain "visible" property of a control using view state in the following way
public bool showstatusbox {
get { return Convert.ToBoolean(ViewState["statusbox"]); }
set { ViewState["statusbox"] = value; }
}
Is there anything I should do other than this to retain value. Because, though I store the value in view state, on postback, its becoming null.
I have four dropdowns in the first page and then a button which saves the selected values from the dropdown to a session state .
In the second page I do have previous button which comes to the first page. My problem is that the dropdown values are not getting preserved.
Here is my code for the First page
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using MyBusinessLayer;
using MyDataLAyer;
[Code]......
The problem is that I get the error object instance not set to an instance of an object
How can we reterive value of a sever control from viewstatet? For example if we want to reterive value of text in texbox server control.
View 1 Replies Is there a way for a user to partially fill out a form and not commit it to the database, leave the page and come back to it and the information that the user filled out is still there?
I am in the process of designing a blogosphere that enable readers to leave comments. I want my dynamically added label controls added to the placeholder on the page to be retained and displayed on subsequent requests or postbacks to the same page. how do I go about this? I have tried using View State but it's kind of beyong me how to work it.
View 1 Repliesi have asp.net treeview control on my masterpage which is associated with many pages now my requirement is that when ever iam clicking child nodes in the treeview its getting navigate to the appropriate page but treeview not retaining its position.its getting collapse to its default position.
View 2 RepliesI have a very simple user control with 5 radio buttons on it, and 3 properties (ID, RatingSetID, and Rating). On the initial load of the page they are on, the code acquires data and places the data into the 3 properties. However, when the submit button is clicked the page reloads and the 3 properties get reset to 0, they are in the !IsPostBack as well.
View 2 RepliesI have a Listbox getting populated when the page loads itself and also in postbacks. Some items are already selected in that listbox even when the page loads or postbacks. I have to select one or more items in that textbox in addition to the selected one.
Till this point, it works perfectly, but the problem is that when i click an "update" button to save the newly added items, then also the page postbacks and so the list box get populated again. This will loose the newly selected items and none of the newly selected items will be saved.
So what should i do in order not to loose the newly selected items when i click the "update" button.
Note:- I need to populate the listbox on postbacks also. So the population of that listbox on postbacks cannot be discarded.
I've got several HTML Input controls (type = "text", runat="server") on a ASPX page. As part of this page, I'm doing a callback (no postback wanted) and am attempting to get the values of the HTML Input controls.
However, when I set a breakpoint in the callback method on the server side, the HTML Input control values aren't there.
So, I have two questions...
1)... According to Microsoft and several other experts, when a Callback is initiated (Javascript calling a server side method), that there would not be a Postback. But, when I debug, I see the Page Load and several other methods being called. I can see the HTML controls in the Page Load event, but again, there isn't any values
2)... How can I retain the values of the HTML Input controls so that I can retrieve their values server side? Again, I'm using Runat = "Server" so that I can "supposedly" find them server side.
I have a custom server control (composite control having dynamically created dropdown boxes and textboxes). I have enabled AJAX in order to avoid page reload.The server control is used inside the ASP.NET webcontrol having few buttons which controls the visibility of the server control. Now I enter values in the dropdown box and texboxes and click on any other button. After this postback the last entered values are gone! The control is not remembering the values. How can I retain the values after post back?
View 4 RepliesI Have the gridview control with 2 dropdown list and 2 text boxes,When the textbox chnaged event happen 1 row will create and the dropdown back to initial values( its not retaining the selected values),I am binding the control after text changed method,Is there any properties needs to be set or any other way we can retain the values in postbacks?
View 4 RepliesI am having a ASP.net application it having three pages ,page 1,page 2,page 3,when the user navigating between this pages I want to maintain the view state in page level after postbacks(i.e.) .If a user visits page 3, passing some query loads some data .then he moves to page 1 doing some entries .after that he once again moves to page 3 now I want to display the data previously available at the time he moves to page 1, same
way I want to do to my three pages up to the user logging out.
i have one method which save datatable in viewstate.i am calling this method in. page_load2. Prerenderthe page was every heavy,i did tracing of page i found due to calling of method from preprnder it doubled the viewstate sizewhat was the reseon behind this.
View 2 RepliesI have a clear button and a textbox in an aspx page. I set the session variable in this page as
String str = Textbox1.Text;
Session["TypeIds"] = str;
and I clear the sessions in a clear button event as
Session["TypeIds"]=null;.
Then when the user types some value in the textbox ,on Response.Redirect on another aspx page, the session variable returns null values.It does not retain its session state. The session state has to be maintained in the next page. Is it because this clear button event and setting explicitly to null creates this problem?
I know the basic of view state. But I dont understand the functionality of view state at a control. For example, a texbox has a property view state. what is the purpose ? what it wiil act for true or false value.
View 3 RepliesI have two radio button list:
*1* report views -- 4 options -- NOT in updatepanel
*2* pagination views -- 2 options -- IS in updatepanel
The situation goes as follows: Refresh WORKS in default setting but when I select *2* radio button options and refresh the page renders the state that the (1) was entered in.
Example: () are the radio buttons
Report Viewing: () (x) () () Pagination View: (x) () REFRESH works!
Report Viewing: () (x) () () Pagination View: () (x) REFRESH fails to display Report Viewing: () (x) () () Pagination View: (x) ()
Report Viewing: () (x) () () Pagination View: (x) () REFRESH works!
OR: () are the radio buttons
Report Viewing: () () (x) () Pagination View: () (x) REFRESH works
Report Viewing: () () (x) () Pagination View: (x) () REFRESH fails to display Report Viewing: () (x) () () Pagination View: () (x)
Report Viewing: () () (x) () Pagination View: () (x) REFRESH works
I am using the session variable to hold the Pagination Viewing option but during page states, I've noticed that when a 2nd option is selected of *2* radio buttons (doesn't matter of 1st or 2nd option was initially selected) that during debugging mode the step over corrects the issue but not the right table viewing. Upon entering Page_Init selection selection index of radio button list returns to 1st option.
What is the maximum size of view state?
View 4 Replies1. the difference of view state and control state.
2. when & how view state is created after that what extent we can use that view state.
3. when & how control state is created after that what extent we can use that controlstate.
As a programmer how much clarification we need to know about view state and control state??
I am trying to use "viewstate" inorder to 1.get the information i type in onepage and retrieve into another page.2.so i created 2 text boxes FirstName and Lastname and a submit button in first web page.3.i want to retrieve these names in the other page for which i am writing the code for button.But i dont know exactly how to use the viewstate....i tried with request.querystring and its working.So i want to use viewstate instead request.querystring.
View 9 RepliesI have a grid view with a nested text box in it.I would like to turn view state off but the fact of the matter is when data is posted,the text boxes inside the gridview aren't available (there are no rows in the gridview on postback). Control's information is not stored in the View State (for things like selected value and .text etc.):Control state,introduced in ASP.NET version 2.0, is similar to view state but functionally independent of view state.However,control state cannot be disabled. Control state is designed for storing a control's essential data (such as a pager control's page number) that must be available on postback to enable the control to function even when view state has been disabled. Source: http://msdn.microsoft.com/en-us/library/1whwt1k7.aspx
View 2 RepliesI have a partial view that is rendered on a view. That partial view has textboxes in it. The user can enter values into them.
I need to put all the values from the textboxes in my partial view into an array, and then give the view (the parent page rendering that partial view) access to that array.
I have a grid view which displays some values. now i have to calculate row wise sum of those values for each row and then display against them.i tried this code but i am getting error as Input String Was not in Correct Format.
public void gv_RowCreated(Object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
int total = Convert.ToInt32(e.Row.Cells[1].Text) + Convert.ToInt32(e.Row.Cells[2].Text) + Convert.ToInt32(e.Row.Cells[3].Text) + Convert.ToInt32(e.Row.Cells[4].Text) + Convert.ToInt32(e.Row.Cells[5].Text) + Convert.ToInt32(e.Row.Cells[6].Text) + Convert.ToInt32(e.Row.Cells[7].Text);
((Label)gv.FindControl("Label8")).Text = Convert.ToString(total);
}
}
I'm having troubles remembering how to grab the list view's state, or page, so that when you leave the list, you can return to the list view page you left on. I have a data pager, and I have hyplerlinks for items in the list view that take you to a file upload or file delete page, and then returns to the list view. It returns to the list view's initial state (first page).
View 1 Replieswhat is the use of view state?
what purpose we using view state?
difference between viewstate and session state?
i have been going through the documentation of viewstate. [URL]It was mentioned that objects that can be serialized are stored in viewstate. What is the meaning of serializing of objects ??
View 2 Replies