MVC :: How To Persist The State Of Html.RadioButton() Through Postbacks
Jul 20, 2010how to make radiobuttons created using Html.RadioButton("id","value") maintain its checked state through postbacks?
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Web Forms :: Persist Dynamically Added User Controls Between Postbacks?
May 6, 2010I have a C# web application that dynamically adds user controls to the default page for whatever "mode" the application is in. The problem is that it is not persisting these across postbacks. How do I persist these across postbacks and keep the content of the controls that are in the user control?
For instance, say I have a user control that creates a new tour record. The user clicks on the Tour item from the menu on the default page, it dynamically loads the tours user control. The user then fills out the form in the tours user control and clicks save. This is where the problem happens. When the postback occurs, the web application has no idea that the new tours user control was ever loaded. So, no save takes place because the Save button's click event never even gets fired.
Using Hidden Input Variable In The Base Class To Persist Value Across Postbacks?
Jan 13, 2011In my base class:
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In my user control that inherits from BaseUsercontrol The ascx has:
<asp:Button id="btnTest" runat="server" OnClick="OnButtonClick" />
Why can't I use the hidden input variable this way?
How To Persist Page State Across Pages
Mar 24, 2011I need a way to save and load the Page State in a persistent manner (Session). The Project i need this for is an Intranet Web Application which has several Configuration Pages and some of them need a Confirmation if they are about to be saved. The Confirmation Page has to be a seperate Page. The use of JavaScript is not possible due to limitations i am bound to. This is what i could come up with so far:
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I can't seem to find a way to load the Page State after being redirected from the Confirmation.aspx to the PageToConfirm.aspx.
ViewState - How To Persist State Between Two Pages
Feb 16, 2011On page1.aspx i hava a textbox with id="tb1"
On page2.aspx I have a textbox with id="tb2"
page2.aspx is set as postbackurl for page1.aspx. For both labels enabl;eViewState is true. Shouldn't the text I write in page1 also appear in the label on page2? Can I implement this without looking into Request headers, and setting the text myself?
Web Forms :: How To Persist The State Of Object On Postback
Jan 26, 2011I bind textbox to a property of an object. After running the app, if the value of textbox is changed, I expect the object to update this property .This does not happen. I also understand that I am recreating the object from viewstate on postback, which is wrong. how to persist the state of object on postbacks all.
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State Management :: Session Does Not Persist After Postback On Deployment
Nov 22, 2010I ve been searching for this on various forums and came through a number of supposed solutions which didnt work for me.
My web form works perfectly for me when on development and after publishing on IIS but when I try to access remotely the session value is always null.
I do these things in the following order and when accessing remotely I always get the exception i throw when session is null.
I debugged it and my list is never null when reaching the assignment point.
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in webconfig I have the following tag which I saw as an answer in many forums
<sessionState mode="InProc" cookieless="true" timeout="200" />
State Management :: Gridview CheckBox Persist In Paging?
Oct 6, 2010Related to this thread: Gridview CheckBox Persist in Paging
Is there any other option than ViewState or Session to save the datatable ?
State Management :: Cookies Just Dont Persist Locally?
Apr 14, 2010I've been trying to add a little Remember Me in my login page and been suffering 2 days with this cookie problem.This is how I set the cookie:
HttpCookie coo = new HttpCookie("test");
Web Forms :: Wizard Control Persist The State While Closed The Browser?
Feb 28, 2011I am using Wizard Contorl in one of my project, I want to maintain the state of the wizard control at any step .Let me explain further , let suppose when user is at Step 4 out of Step 10 and then user would close the browser so the state should be persisted and when the user come back again to the same URL the step would be 4.
View 1 RepliesState Management :: How To Persist A Class Object When Page PostBack
Oct 5, 2010i have created a user control UserControl.ascx, in Code behind file of UserControl.ascx i have created an object of a class MyClass.cs,
Like
if(!Page.IsPostback) {
objMyClass= new MyClass();
}
but when i click on button of UserControl.ascx page and try to access objMyClass object then it set as null, so how to persist MyClass object when page PostBack, i wanted to keep object persist till the user access the page, when user goes out of this page then object should distroy?
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State Management :: Session Variables Persist Between HTTP And HTTPS?
Feb 10, 2010Just wondering whether or not Session Variables that are declared and set while in a HTTP session will continue to exist if the users session moves to HTTPS?
View 4 RepliesNewbie PostBacks And State Of Controls?
May 4, 2010In the Page_Load() event handler for one of my pages I use the new statement about 100 times equating to memory allocation for about 100 objects. As follows:
using System.Web.UI.WebControls;
Table mytable1 = new Table();
TableRow [] myrows = new TableRow[5];
TableCell [] mycells = new TableCell[100];
int i;
for(i=0; i<5; i++) myrows[i] = new TableRow();
for(i=0; i<100; i++) mycells[i] = new TableCell();
My question is, should all of these new statements be enclosed like so:
if(IsPostBack==false) {
// Initialize all controls for page just once during the session
}
Or should the Controls be freshly allocated, initialized, and added to the page each time the Page_Load event handler is called? I personally don't think its efficient to create mytable from scratch every Page_Load since all I really ever change is the contents of the table and not the table itself.
State Management :: How To Make A Custom Property Or A Page Persist Across Postback
Sep 29, 2010I have an object to hold some specific state information in my web application - I pass it back & forward between pages by making it a property of a basepage which works fine, but I lose it on postback.
Is there any way to persist this property without manually adding & reading it again from viewstate?
GridView Doesn't Remember State Between Postbacks?
May 13, 2010I have a simple ASP page with databound grid (bound to an object source). The grid is within the page of a wizard and has a 'select' checkbox for each row.
In one stage of the wizard, I bind the GridView:
protected void Wizard1_NextButtonClick(object sender, WizardNavigationEventArgs e)
{
// Bind and display matches
GridViewMatches.EnableViewState = true;
GridViewMatches.DataSource = getEmailRecipients();
GridViewMatches.DataBind();
And when the finish button is clicked, I iterate through the rows and check what's selected:
protected void Wizard1_FinishButtonClick(object sender, WizardNavigationEventArgs e)
{
// Set the selected values, depending on the checkboxes on the grid.
foreach (GridViewRow gr in GridViewMatches.Rows)
{
Int32 personID = Convert.ToInt32(gr.Cells[0].Text);
CheckBox selected = (CheckBox) gr.Cells[1].FindControl("CheckBoxSelectedToSend");
But at this stage GridViewMatches.Rows.Count = 0! I don't re-bind the grid, I shouldn't need to, right? I expect the view-state to maintain the state. (Also, if I do rebind the grid, my selection checkboxes will be cleared)
NB: This page also dynamically adds user controls in OnInit method. I have heard that it might mess with the view state, but as far as I can tell, I am doing it correctly and the viewstate for those added controls seems to work (values are persisted between postbacks)
UPDATE: Could this be to do with the fact I am setting the datasource programatically? I wondered if the asp engine was databinding the grid during the page lifecycle to a datasource that was not yet defined. (In a test page, the GridView is 'automatically' databound'. I don't want the grid to re-bound I just want the values from the viewstate from the previous post!
Also, I have this in the asp header: ViewStateEncryptionMode="Never" - this was to resolve an occasional 'Invalid Viewstate Validation MAC' message
For reference, my GridView is defined as follows:
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JQuery - How To Maintain The State Of Hidden UI Elements Across Postbacks
Jan 17, 2011I'm working on a webform with various controls. Depending on user-input I show/hide (using JQuery's show()/hide() functions) bits of the GUI. However if the form is posted-back and fails validation, I want the GUI to remain in the same state it was pre-postback rather than returning to the first-load state. Obviously the ASP.Net controls retain state, but I have HTML containers that are pure client-side objects.
In attempting to design a solution I find myself heading towards the murky (and tricky-to-debug) realms of hidden form fields - more reminiscent of my pre-JQuery work than anything 21st Century :-(
AJAX :: Page State Lost During Postbacks With Updatepanel
Jan 14, 20101. I have couple of checkboxes and some text fields outside the updatepanel.
2. Based on the checkbox selection, I will be hiding/showing the fields to user using javscript.
3. I have a upload control in the same page which is placed under the updatepanel. When I upload the file, I will be reading the content of the file and I'm trying to load it into the controls which are outside the updatepanel. As I know the controls won't updated until unless it has been added under the updatepanel.
4. I moved all the controls outside the udpatepanel (checkboxes and textboxes) and placed it inside the updatepanel so that when the file is uploaded I can read the file and assign to the controls.
After this, I was able to assign the values to the control. However, the problem is, the state of the page (javascript hide and show) has not been retained during the postback. For example, if i have 2 checkboxes and 2 textboxes, if i click firstone, it should show the first checkbox. If I click the second checkbox, it will show the second textbox. By default, when the fresh load happens, first textbox will be shown. When I click the second checkbox (its showing the second textbox) and do the postback by uploading the file, the state gets lost and when the page load completes, it's showing the first textbox instead of showing the second textbox.
How To Maintain Button State In On_Load On AJAX Timer Postbacks
Nov 14, 2010I am developing a web part that uses AJAX Timer and Update Panel to perform some data check. There are two buttons outside the Update Panel on the web part that I also want to maintain during the Timer postback. I cannot put these two buttons in any UpdatePanel because they need to call Response.Write() to display some Excel data to users in their On_Click event. My current solution is using ViewState to maintain these two button in On_Load event. However, I am not sure if this is a correct solution (haven't tested it). Does any one know that during a Timer postback, if I disable/enable these two buttons using ViewState in On_Load, will it update the page properly with the two buttons disabled/enabled? Or will it ignore any control that are not in the UpdatePanel regardless where you maintain it? If my solution is not a good practice, can someone suggest other alternatives?
View 1 RepliesPersisting Checkbox State If Browser Back Is Clicked After Postbacks?
Feb 9, 2010I've a checkbox with autopostback=true. If i check the checkbox the postback occurs and changes a label text. But if i click back in the browser the checkbox is not returning to its previous unchecked state. How can i bring back its state?
Can i write some JavaScript to persist the state of a control?
State Management :: Viewstate Not Being Persisted Across Postbacks On Web User Control?
Mar 5, 20101) I found that my viewstate was not being persisted across postbacks for web user controls. I ensured that the Enable Viewstate property was set to true (of the page)
2) The Viewstate isnt being persisted on the 1st postback.
3) However, it is being persisted from the 2nd postback onwards.
I stepped through the code to ensure that the Viewstate had the 2 keys that I was adding on page load. However, on the 1st postback, the viewstate is empty. Everything is ok from the 2nd postback onwards.
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State Management :: Webcontrol Loosing Viewstate Information During Postbacks?
Feb 5, 2011I am having tough time finding out this reason. I have a web control where i add some variable in viewstate. like viewstate["test"] = "1".
when i post back this viewstate no more exists in collection.
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Web Forms : File Upload Control State Can Be Maintained During Postbacks?
Jul 14, 2010I have a requirement where i need to add file upload contorls dynamically.Intially i have a upload control in my page and button named 'Add fileupload' and another button named 'Upload'.the fileupload control is added dynamically when 'Add fileupload' button is clicked andUpload button is used to upload the files.when i click on 'Add fileupload' button after browsing the file to fileupload control, the new fileuplaod contorl has been adding successfully but the first fileupload control is empty.Can any one please help me how the state of fileuplaod control is maintained.Here is the code
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State Management :: Persisting DropDown List Attributes Across Page Postbacks?
Oct 12, 2010how can DropDownList attributes be persisted accross page Postbacks?
Example:
DropdownList1.AutoPostBack = True
DropdownList1.items(0).Attributes.Add("Attribute1","somevalue")
On Postback the attribute is no longer available (ie. attributes.count=0).
I tried persisting using the code below, but was unsuccessful:
Before PostBack: ViewState.Add("DDL","DropdownList1")
On PostBack: DropdownList1 = ViewState("DDL")
This generated the error: DropDownlist is not marked as serializable.
I than tried:
Before PostBack: Session.Add("DDL","DropdownList1")
On PostBack: DropdownList1 = Session("DDL")
This did not err but attributes were still not available.
Forms Data Controls :: Persist HTML Input In GridView On Post Back?
Nov 11, 2010I have a GridView control that has an ItemTemplate that contains an HTML radio button. In my code behind I am querying a database, retrieving a column of values, and then binding the list to the GridView. My problem is that the radio button that I select is not being persisted on post back. I have tried using an ASP RadioButton rather than an HTML control, but when I do that all of the radio button can be selected at the same time (i.e. like check boxes). how to persist the radio button that is selected in this scenario?
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Use Html.radiobutton - Getting Overload Error
Feb 25, 2010In a asp.net mvc form, im using a radiobutton set, to set a property.
<%=Html.RadioButton("Tipo", "Pizza",
CType(Model.Tipo = "Pizza", Boolean), New With {.id = "Pizza"})%>
<label for="Pizza">Tipo Pizza</label>
<%=Html.RadioButton("Tipo", "Barra",
CType(Model.Tipo = "Barra", Boolean), New With {.id = "Barra"})%>
<label for="Barra">Tipo Barra</label>
I need the CType or i get an overload error. This case seems like the most commom use of radiobutton when working with a Model property. Of course i could create a partial view or a control, but apart from that, is there a cleaner code to accomplish this?