Web Forms :: Show/Hide Image On Dropdownlist SelectedIndexChanged?
Mar 12, 2010
Basically I have a dropdownlist (ddlSystem) and an AJAX update panel. Inside the update panel I have an asp:GridView (gvSystemSpecs) and an asp:Image (imgLoad).
For triggers on the update panel I have:
[Code]....
When the user changes ddlSystem it makes a service call to pull back a bunch of data and populate the gridview.
I want to be able to show a loading image (imgLoad) when ddlSystem is changed. Once the function to pull data and populate the gridview is complete I need to hide the loading image.
I think I'll need to use some JavaScript, but what ever I try doesn't work and I don't know if the update panel has anything to do with it...
I have a label , textbox ,and dropdownlist,in dropdown i have two items Accepted and Not Acceptedif i choose Not accepted it visible the label and textbox in vb.net.
I have an emergency request that I need to sort it out very quickly as I did not notice it early :(.
I have a dropdownlist, the contnet in the gridview (sqldatasource connection) changes based on the value the user slects, say I have play1, play2 from the dropdownlist, I would like to show column1, column2 and column3 with user selects play1; show column4, column5, and clomn6 when use selects play2; the datatable actually includes all 6 columns.
I understand that I need to use something like RowCreated event, and I need to set up condition based on the dropdownlist value, but I dont really know how to.
I have a dropdown list which include "yes" and "no". When I click "yes", then there have to be 2 text boxes visible, just below the dropdownlist. If the user selects "no" in the dropdownlist, then the 2 text boxes have to disappear again.
ALTER procedure [dbo].[storeinfo1] @Behcode nvarchar(10) as begin select behcode,Name ,(select Behcode from House_p where BehCode=@Behcode) behcodeP from House_Info where BehCode=@Behcode end
I have image=>Productimage in product.aspx page I want if in House_p table there be my users behcode it do Productimage.visible=true
i.e
In House_info table exist user Sara with behcode=3333 her behcode isn't in House_p table so I want in product.aspx page ProductImage.visible=true
i am using template field display image based on condition in table field. i have field name verify i used to store yes or no value if it is yes then display image else noting to display in gridview
I have one dropdownlist control which populates values to other controls. Means upon selecting item in dropdownlist, related data is populated in other controls. I have also assigned dropdownlist's autopostback to TRUE. Everything is working good as far as dropdown has more than one item.
Whenever there is only one item, selectedindexchanged event is not fired (obviously.....) and eventually the data is not populated to other controls.
How could I get rid of this scenario? I mean which event should I use to avoid this?
At this time, I have just added the first item as something like "---Select Item---" , so when end-user has to select different item and thus the selecteditemindexchanged is fired. no biggie... but just wondering if proper solution is available....
I want to be able to show dates on calendar on SelectedIndex event of dropdown list.. i.e. once a user picks a value from dropdown list according to that dates (from DB) will be selected on calendar..
This is the code i am using, but i am using it in a DayRendar event. (How can i link them) how can i make it work??
Getting an unexpected event firing dropdownlist's selectedIndex event. When I try to redirect from another page by a linkButton. I just changing dropdownlist selectedIndex.Its okay.But after that When I attempt to redirect to another page,DropDownList's selectedIndex event firing (before linkButton Onclick event).But I am not changing any thing in dropdownlist.Somehow its event firing.
also any page viewstates is default (not off).But loading webcontrols into masterpage Page_Load like this :
[Code]....
if this dropdownlist selectedIndexchanged event firing. Because of I am loading webcontrols each masterpage's PageLoadEvent.
What do you prefer this may the reason of this unexpected event firing ? if so. Do you have a better technic to load controls Just for one time and not each pageLoad.maaybe a caching technic I am missing or shoult I use substution.
I couldnt find the main reason why a dropdownlist selectedIndexchanged event firing without I changed anything on that dropdownlist.
what reasons may cause this problem ? if you say viewstate its turned on defaultly. any other reason you know why ?
When I select from the first dropdown I want to populate the second. However, this is not happening. The postback is happening, but the SelectedIndexChanged handler isn't being called (I have a breakpoint which isn't being hit). The user controls are created dynamically and put into a PlaceHolder which itself is within an AJAX Updatepanel, with ChildrenAsTriggers set to true.
Problem:in the Host(not local system) Captcha show only one image that created for first time,but in my local system every things is right,and captcha change for every page load...
i think image can't find server folder address and always show first produced image!!!
see code:
[Code]....
where is the problem?
notice:when i see server "Upload" folder and "AddIntuitionReflexRandom.gif" file,content change truly,but that can't show in my image.
I have in my MasterPage a DropDownList that appears in all my Pages. I want it to run a specific code when user select another item in the list, but the event SelectedIndexChanged in the MasterPage doesn't work. How can I do to get this event working?
on SelectedIndexChanged event handling of DropDownList in ItemTemplate of ListView. I put OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" in mark up, with code behind, but only to get Compiler Error Message: BC30456: 'DropDownList1_SelectedIndexChanged' is not a member of 'ASP.webform1_aspx'. How do I make it a member? When I do not put OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" in mark up, BC30456 does not pop up, but nothing happens when dropdownlist selected item is changed.
I am adjusting my DropDownList on my MASTERPAGE to point to resourcefiles - like this:
<asp:DropDownList runat="server" ID="Language1" AutoPostBack="true" OnSelectedIndexChanged="Language1_SelectedIndexChanged"> <asp:ListItem value="0" Text="<%$ Resources:SiteMapLocalizations, DropDownSelect1%>"></asp:ListItem> <asp:ListItem Value="0" Text="<%$ Resources:SiteMapLocalizations, DropDownSelect2%>"></asp:ListItem> <asp:ListItem Value="0" Text="<%$ Resources:SiteMapLocalizations, DropDownSelect3%>"></asp:ListItem> </asp:DropDownList> Problem now is that my SelectedIndexChanged has broken its funktionality in MasterPage.master.vb: Protected Sub Language1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Dim cookie As New HttpCookie("SelLang") cookie.Value = Language1.SelectedValue Response.SetCookie(cookie) Response.Redirect(Request.UrlReferrer.AbsoluteUri) this is for the redirecting to the referrer page End Sub
I have a gridview and dropdownlist, let say the content of dropdownlist is YEAR and the content of gridview is Name and Year. Now for everytime I change the Value of dropdownlist the content of gridview will change but it will not load the page
In our asp.net web application we load the dropdown list boxes in the page load. We than set the SelectedValue of each dropdown list box to an object from session. We have event handlers for many of the SelectedIndexChanged events of the drop down lists boxes, but these do not get executed when we set the selected value programmatically.
Someone else mentioned this is by design, and only when a user manually changes the drop down list selected index, will the event get raised.
I would think this is a common scenario of wanting the selectedindexchanged event handled when setting the selectedvalue/selectedindex/listitem's selected property, of a DropDownList. What is the suggested way to handle this? Is there a significant drawback of creating a custom control inherited from DropDownList that has the functionality of raising this event when changing the SelectedIndex or SelectedValue?
