If I have a list of radiobuttons like this:
[Code]....
, when submitting the form and return the untyped View again, the selection is lost. What is the best practise to overcome this in MVC?
My submit-action looks like this as I am also passing an uploaded file...
[Code]....
I'm inserting controls dynamicaly on my page on pre-init, thease controls are inserting based on a dropDownList that load its values from a database. These values are diferent to all clients.
If I insert my controls on pre-init then I have access to the value of radiobuttons, but this insert only 1 controls cause in pre render I don't have the selected value of dropDown.
If I insert my controls on on-load event then I have the value of my dropDownList control so I can be able to inser the correct number o controls but I don't have the value of my auto-postback radioButtons.
I make a project to solve this and I share the code of it here. (VB.Net 4.0)
Front Code:
[Code]....
I have a user control with a dozen radion buttons in it.Every pair of radio buttons execute a Sub on server side.All of the radio buttons have the autopostback set to true.There is a public Sub of the usercontrol that gets called only once by the page and loads the data setting the radio buttons to checked or not checked.The problem is, that once a radio button is set, it will execute it's server side code on every postback even if the postback is caused by another control on the usercontrol or even another control on the page. So if all the radiobutton pairs are set and a postback is caused, there will be six server side Sub executing! Casting the sender in each of those Subs gives back the radiobutton that is checked at that point, so it's if on every postback the event is fired for each checked radiobutton.
View 2 RepliesI have a set of radio buttons for "yes" and "no" values which have a name="choice". "yes" is checked by default. They're both runat="server". I read the choice on postback like below. It works perfectly fine as long as the validation doesn't fail. For example, if I select "no" and validation fails on postback, I still see "no" selected. But if I submit the form after correcting everything, the value read is "yes" on server side! Is this a bug in .net, and if so, how do i fix this?
foreach (string key in Request.Form.AllKeys)
{
if (key.EndsWith("choice"))
return Request.Form[key] == "yes";
}
I'm having trouble with a simple radio set of two radio buttons (I don't want to use a RadioButtonList [RBL] because RBL doesn't allow child controls, and in my case, if you select one option, I want to enable a textbox next to the button; yes you could hack this with jQuery to move the textbox, but that's dirty!). I would check one, submit the form (either explicitly or through AutoPostBack), and the CheckedChanged event would never fire. When the page was reloaded, both buttons would be unchecked, regardless of their initial state on non-postback load or the state before form submission.
form id="form1" runat="server" enableviewstate="true">
<div>
<asp:RadioButton ID="foo" Text="foo" runat="server" AutoPostBack="true" OnCheckedChanged="rbChanged" Checked="true" GroupName="foobar" EnableViewState="true" />
<asp:RadioButton ID="bar" Text="bar" runat="server" AutoPostBack="true" GroupName="foobar"
OnCheckedChanged="rbChanged" Checked="false" EnableViewState="true" />
[code]...
I'm having a little problem with my file uploading. Does anybody know how to maintain the value in the FileUpload control between server posts?
I have a form which, among other things, uploads a file. I am using an ileUpload control (created dynamically) to let a user browse their PC for a file and then using the SaveAs method to upload the file to the server.When I'm selecting a file and Click on Next button for processing then selected file is lost.
Same is happening with me with HtmlTextArea (dynamically generated) , the problem was that I was not again re-initializing the controls after postback. What I did is re-initialized it in Init method of placeholder (as I have created/placed all dynamic controls in placeholder ).
But this thing is not working for fileupload control. I found solution in one of the forum is that "use hiddenField Control to transfer the selected file from the client to server"but this mechanism will only help to retain the name of file
in a hidden variable and the FileUpload1.PostedFile.SaveAs(filename) will not work bcz of absense of object (fileupload1).
here is code:
[Code]....
I have done almost the same in different test project , it works . I dont know whats wrong?
[Code]....
How to correct this?
There is button(btnOpen) and a textbox (txtResult) in the page.
Once I clicked on btnOpen, a modal dialog will appear, displaying TextBox1 and Button1.
The user is required to type something in TextBox1 and I want to pass the TextBox1.Text into my database but when I try to do that, the value actually = "", which is gone.
So I created this test program to illustrate by passing the value into a txtResult.
Can anyone guide me on getting the TextBox1.Text value?
Besides that, is there anyone to tell more about what does this lines of code do?
[Code]....
The aspx code:
[Code]....
the Code Behind .cs :
[Code]....
I am creating a control that inherits from the RadioButton, so that I can set the GroupName property manually. Everything is working okay apart from the fact that when the page posts back, the RadioButton becomes unchecked if it has previously been checked. This is the first time I've tried inheriting from controls, so must be doing something really silly. I would welcome anyone helping me to improve my code so that the control's Checked value persists through postbacks. I am causing a postback using a button, not the actual RadioButton itself, if that makes any difference. Here is my code:
[Code]....
I have the following simple code:
[Code]....
So when i select "Yes" from the first drop down, the "hiddenDetail" label becomes visible and when i select "No" from q1 the "hiddenDetail" label becomes invisible.The problem is that because i am using AutoPostBack when you select "No" the "hiddenDetail" loses its children (i.e. the label inside it) which is obvious why but i am wondering, is there anyway i can make the "hiddenDetail" invisible (sort of like display:none in style) in VB without losing its children. Or is my only option to work with this in
radiobuttonlist Value is not saved when saving on where the problem is?
<form id="form1" runat="server"> <div> <asp:RadioButtonList ID="rblShippers" runat="server"> </asp:RadioButtonList> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /> </div> </form>
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Data;using System.Data.SqlClient;public partial class _Default : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) {
string strConnString = "data source=.;initial catalog=saeed;integrated security=true"; using (SqlConnection con = new SqlConnection(strConnString)) {
[CODE]...
I have gridview. In my griview, i have Fileupload template field.
but, problem is whenever my page get postback fileupload loses its content or selected file.
Currently struggling with a problem that I've encountered variations on in the past. At the moment a worthwhile solution escapes me, but it seems such an obvious issue that I can't help wondering whether or not there's a "best practice" approach I should adopt.Without code, here's the issues in a nutshell:
page has databound control (a repeater) which isn't populated until user inputs data and clicks a button.Repeater item template contains a buttonUser clicks button, page posts back. On load, the repeater is actually empty so event is never handled because the originating control no longer existsGo back to the beginning of wretched cycle I've confirmed that this is the problem because if you provide the repeater with some static data on page load, everything works fine. But of course that's no use because it has to be populated dynamically.Is there a commonly approved way round this headache? I can store the data in session and re-use it on page load, but it seems terribly clumsy.
First time using an Accordion Control and I'm having some trouble with the CSS, as per the subject description. I have only created the headers so far and assigned some basic CSS to them. Right now that CSS is only there to limit the width (and therefore clickable area) of the header to the width of the image that the header is represented by. This works fine until I click on one of the headers and then its width property is lost. Same for the other headers, they are fine for the first click and then after that they lose their style. There is no postback caused by selecting a header so this is not the reason that the CSS is being lost.
Here is my html:
[Code]....
I have a gridview with columns 'Edit', 'Delete', 'View Results' and other details. The 'Edit' column opens a modal popup to edit the record. The 'View Result' column is in a login view and this column is only visible to users belonging to the group 'Manager' as below:
[Code]....
When the page is first loaded, the hyperlinks are displayed correctly. however, after editing a record and saving the changes, the 'View Results' column loses the hyperlink.
I tried creating a temp hyperlink column outside a loginview control and this seems to work correctly.
I have a custom radiobutton and it renders fine but loses state after postback.
How can it be modified?
[Code]....
I have an asp.net page with some JQuery tabs. Everything works ok.I added a dropdownlist in one of the tabs, that causes a postback. After the postback I want the same tab to be selected.I initialize the tabs as:
<script type="text/javascript">
$(document).ready(function() {
var $myTabs = $(".tabsDiv").tabs();
</script>
Then, on the PageLoad event, I inject a script to select the tab:
Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "TabSelect", "$myTabs.tabs('select', 1);", true);
For some reason this doesn't work. The script is running but the tabs are not selected.Is it because the RegisterClientScriptBlock places the script in the bottom of the page and, for some reason, it runs too late?
Platform: ASP.Net 2.0 I have multiple checkboxlist controls on a webpage. Along with that i have the same number of buttons on that page. Initially all the checkboxlist controls are hidden. When user clicks on a button, corresponding checkboxlist controls gets visible making others hidden and allows user to select the options.
On postback, if user clicks on the same button again, the corresponding checkboxlist gets visible but the item selection is not retained. However, this happens only in IE. This works fine in FireFox. I am using JQuery to toggle the visibility of checkboxlist.I guess the problem is because i am toggling the visibility of checkboxlist which IE doesnt seem to like. What is the solution to this problem?
I have a search page with a TextBox that allows someone to type in a search term and press enter. (Which fires TextChanged). I have a DropDownList that specifies the kind of search that will be performed. It is defined in the markup as follows:
<asp:DropDownList ID="lstSearchType" runat="server" AutoPostBack="false">
<asp:ListItem Value="0">Last, First</asp:ListItem>
<asp:ListItem Value="1">Last</asp:ListItem>
<asp:ListItem Value="2">First</asp:ListItem>
<asp:ListItem Value="3">Liberty ID</asp:ListItem>
<asp:ListItem Value="4">E-mail</asp:ListItem>
<asp:ListItem Value="5">Telephone</asp:ListItem>
<asp:ListItem Value="6">Birthday (exact m/d/yyyy)</asp:ListItem>
<asp:ListItem Value="7">SSN (exact ###-##-####)</asp:ListItem>
<asp:ListItem Value="8">Address</asp:ListItem>
</asp:DropDownList>
As you can see, AutoPostBack is set to false, and there is no event hookup.
Pressing enter fires the OnTextChanged event for the TextBox, which performs a search and updates a GridView in an UpdatePanel. This UpdatePanel has its UpdateMode set to conditional and has one trigger: the TextChanged event of the search TextBox.
It's very simple.
And it works beautifully, almost.
Whenever I change the search type, the very next search does a full postback. All subsequent searches do partial postbacks (as desired) unless I change the search type again.
There is one exception to this rule: if I load the page and immediately change the search type, it doesn't do a full postback. So the first change of the DropDownList before any postback (full or partial) does not trigger a full postback.
Full Disclosure: I'm doing a lot of JavaScript to change the appearance of the gridview during async requests. I don't detail it here because it seems unrelated. This problem only occurs when a DropDownList with no JavaScript wired up is changed.
I have been having some trouble with dropdown lists reverting back to selecting the initial item in the list after a postback once a selection has been made from the dropdown list. I have read up on this and found out that a "if not ispostback then" is required.This works fine when I add in all the items in the dropdown list manually like:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
ddl1.Items.Add("Select...") [code]....
However, I have over 250 items and so it is far more efficient for me to load then in by using part of a multidimensional array which is created from a text file - Definitive database.txt. I have been using the following code to do so:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
'loads the definitive database array[code]...
This loads all the items into the dropdown list perfectly, but now every time a selection is made, it reverts back to the inital item on postback even though i have included the "if not ispostback then" part.
I'm trying to put a updateprogress into a webpage where selection from the dropdownlist causes postback. Works out well except that on the first postback, the gif image shows on the leftside rather than on the center. On succeeding postback, it will show on the centre where I intend it to be. Below is my code:
[Code]....
I have two dropdownlists on my page that are related to one another, and are built dynamically. I did not write the original code, but I believe it is using AJAX so the whole page doesn't postback when the ddl selection changes. The first ddl is Status and the second is ContractType. Here is the code for the event handler:
Code:
protected void Status_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
DropDownList status = (DropDownList)sender;
string selectedStatusId = status.SelectedItem.Value;
[Code] ....
Here is some of my debugging info:
? view.Count
4
? view.Table.Rows.Count
20
? contractTypeDropDown.SelectedValue
[Code] .....
I commented out the event handler since this snapshot, just to see what would happen, but when I was hitting it you can see what ex.Message was. I don't understand why it says the SelectedValue is invalid when I see the selected value is "E " and that is one of the four items in the ddl.
I have an asp:ListBox which contains a list of countries. Users select one or more countries and then assign them to another list box on the page.
<asp:ListBox id="countrylist" runat="server" SelectionMode="Multiple" AutoPostBack="True" CssClass="inputC" OnSelectedIndexChanged="countrylist_SelectedIndexChanged"></asp:ListBox>
In Internet Explorer, if I scroll down (say to United States) and then click it, the list scrolls back to the top. United States is still selected, if I press the "Assign" button it will appear within the second list box, and if I scroll down I can see that United States is still selected.
However, users are complaining about this, especially since it happens so quickly that they can't select multiple countries.
I tried using smartnavigation and MaintainScrollPosition, but this has had no effect.
<%@ Page Language="C#" smartNavigation="true" MaintainScrollPositionOnPostback="true" AutoEventWireup="true" EnableEventValidation="false" MasterPageFile="MasterPage.master" CodeFile="form.aspx.cs" Inherits="forms_template" %>
This behaviour is not exhibited in Firefox.
i have a dropdown list
<asp:DropDownList ID="DDName" runat="server" AutoPostBack="True"
DataSourceID="sdsName" DataTextField="Name" DataValueField="name_ID"
Width="179px">
</asp:DropDownList>
the problem that it is not causing post back on the first selection but on the second, I mean if i select from drop down list first selection no post back on the server,but when i select another item from the list (the second click on a different list item )
i have searched on google and got an article [URL] keep selected file in fileupload control even after page postback. But it's not working at all. So is there any way through which we can keep selected files in fileupload even after page postback.?
View 1 RepliesThis is likely a n00b question, but I can't seem to find any info on how to solve it. Here's the scenario:
I have a Textbox and a RadioButtonList in an UpdatePanel, both with AutoPostBack turned on (they need to be, can't turn it off on the text box))
The user enters some text in to the textbox, then clicks one of the Items in the radio button list.
Because the textbox post back is executing, the radio button is losing the value that the user selected.
How can I workaround this?