I have three cascading dropdowns on my web page and they work fine. The issue I am facing is that there are other controls on the page which cause a postback and with each postback the cascading drop downs are being re-populated (service methods are called) which is becoming a performnace issue.
View 1 RepliesI am using cascading dropdown list where the no of dropdowns is created dynamically on the page. The cascading drop downs are contained in a User Control. I need to call a method from the Parent page which will be executed when the values in one of the dropdowns change. The server side event is not firing as I have set AutoPostback property for the dropdownlists to be false. How can i make the Page event fired from the Selected index changed of the dropdowns keeping the autopostback property to be set as false.
View 5 RepliesI am using an AJAX dropdownlist control with two dropdownlist. Instead of using a webservice to populate the data, I used the pagemethod to populate. My problem is the second droplist won't populate. I get a server error, 500 in the droplist. The first droplist populates fine.
BUT here's the real kicker. If I reverse the order of the public static function such that GetHelloList2 comes BEFORE GetHelloList1 in the code, then the GetHelloList2 works ...... it just seems like it is only firing one pagemethod event and allowign only one.
[URL]
I have a web service/wsdl file that requires client authentication to passed through SOAP headers.
There is not property or method available in web service to set the SOAP headers.
how to call the web service method along with SOAP headers in .NET 2.0
I've been working on my first version of an ASP.NET app, using cascading dropdowns. I've got 2 dropdowns on a page.
However, the third major control on the page is a details view. It works fantastic, with the cascading dropdowns, to display information from the second dropdown, and allow the user to edit that data. All well and good. But now, in testing, I suddenly realized that I've got no way of displaying the details view if I want to let the user enter new data, which would show some information in the second drop down.
This has totally spoiled my .net 4 vs2010 realease day happiness. Running Cascading dropdowns using 'webservice' asmx method. Everything worked on .3.5 and i solved the running 'code In page' method with this post. Method error 500 [URL] Thought I was sorted but seems the rules are totaly different for the 'webservice method'. For example where did ToolkitScriptManager come from Ive been using ScriptManager for years. Anyway below is the Webservice and Page code. Ive looked at and tried everything of the forum but all of it is pre .4. This is demo code, the real version has 3 dependant dropdowns and the lookups are used several times so it HAS to be a webservice. My current theroies are:
1. Permissions- dosent makes sense.
2. Something missing in web.config to enable webservices.
3. Something to do with placement of 'System.Web.Script.Services.ScriptService()>'
<%@ Page Language="VB" ValidateRequest="false" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="Default2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "[URL]">
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
<html xmlns="[URL]">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager>
<asp:DropDownList ID="DDListManufacturer" runat="server" CssClass="ddsearch" Width="140px">
</asp:DropDownList>
<asp:CascadingDropDown ID="DDListManufacturer_CascadingDropDown" runat="server" Category="Manufacturer"
PromptText="Select a manufacturer"
ServiceMethod="WebService.GetDropDownContents"
TargetControlID="DDListManufacturer"
ServicePath="WebService.asmx">
</asp:CascadingDropDown>
</form>
</body>
</html ............................................
I have 3 dropdowns in my VB.Net 3.5 web app. After a user selects a value from the first (let's call it Countries) the second (called States) should populate correspondingly. Dropdown three (cities) should also cascade down after a State is selected. The Countries and States dropdowns have SQL DataSources. The Cities dropdown has to call 2 procs (based on the selected State value) so it does not have a SQLDataSource. My question is, the code below works for Countries and States, however, I cannot ge the Cities to populate...
<asp:DropDownList ID="drpCountries" runat="server" DataTextField="CountryName" DataValueField="CountryId" DataSourceID="sdsCountries" AutoPostBack="true">
</asp:DropDownList>
<asp:SqlDataSource ID="sdsCountries" runat="server" ConnectionString="<%$ ConnectionStrings:MyConnectionString %>"
SelectCommand="SELECT * FROM [Countries] ORDER BY [CountryName] ASC"></asp:SqlDataSource>
<asp:UpdatePanel ID="updStates" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:DropDownList ID="drpStates" runat="server" DataTextField="StateName" DataValueField="StateId" AutoPostBack="true" DataSourceID="sdsStates">
</asp:DropDownList>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="drpCountries" EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
<asp:SqlDataSource ID="sdsStates" runat="server" ConnectionString="<%$ ConnectionStrings:MyConnectionString %>"
SelectCommand="SELECT * FROM [states] WHERE StateId = @StateID ORDER BY [StateName] ASC">
<SelectParameters>
<asp:ControlParameter ControlID="drpCountries" Name="StateID" PropertyName="SelectedValue" DefaultValue="" />
</SelectParameters>
</asp:SqlDataSource>
THIS DOES NOT WORK:
<asp:UpdatePanel ID="updCities" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:DropDownList ID="drpCities" runat="server" DataTextField="CityName" DataValueField="CityId" AutoPostBack="true">
</asp:DropDownList>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="drpStates" EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
Protected Sub drpStates_DataBinding(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles drpStates.DataBinding
' Call some procs and get a DataSet
drpCities.DataSource = ds
drpCities.DataBind()
End Sub
I am showing state,city, zipcode in cascaded format. I designed cascade dropdown with asp dropdown list controls. I am loaing the citys & zipcode based on selection index changed.. here when I am selecting city the request is sending to server & its loading citys....
I don't want see post back operation on my page when I am selecting city & zipcode. So I am thinking to use Ajax cascade dropdown list to avoid sending the request for each selection.
If I use Ajax Cascade dropdownlist can i cascade the loading of citys & zipcode without using webservices?
If I use only webmethods for cascade dropdown it will work ?
I have three cascading dropdowns and two of them need to trigger something outside of the dropdowns, so I have OnSelectedIndexChanged events on them. So as to not reload the whole page when these items are triggered, I have all of this in an Update Panel.
Everything works fine -- the only issue that the client doesn't like is that the cascading dropdowns reload on the asynchronous postback.
I have a working version of cascading dropdowns.
the code line that adds each item into dropdown is:
[Code]....
I have an AsyncFileUpload with an image control to show a preview of the pic that is uploaded. Everything works fine, however on the postback from the asynchFileUpload the page jumps to the top of the page and then after a second or two it goes down to the proper scroll position. What can I do to avoid having the page jump to the top and then back down again on the postback ?
[Code]....
I am using ModalPopupExtender of Ajax Control Toolkit(v2.0.50727) as shown in the following way.
The problem iam facing is whenver i try to show the Popup ,Postback of entire page is happening which is cauisng lot of performance issues.
how to avoid the post backs when using ModalPopupExtender ..
<asp:UpdatePanel
ID="upmodal"
UpdateMode="Conditional"
runat="server">
<ContentTemplate>
<asp:Panel
ID="pnlCmnSrc"
runat="server"
CssClass="modalPopup"
Style="display:
none">
<table>........
I have written web methods in code behind and I'm able to call them using PageMethods.(method name) in an ordinary aspx page.
If I'm trying to call the webmethods in a master page using PageMethods.(method name), it is throwing a jscript error pagemethods is undefined.
My code is like this:
[Code]....
[Code]....
From one of my webpage, I am opening up another form as ModalDialog, and on this form, I have a Grid, Treeview and some other controls.
[Code]....
I have some code on click of Treeview Node, I fill out other data in Grid on click of Treeview Node.
Now the problem is when page posts back ( on click of Treeview Node ) , page flickers once during filling up data in Grid.
Basically whenever page.ispostback is true, page flickers, Now I want to avoid this.
I have to keep "SmartNavigation="false"" on this page because of some of the Treeview Problems.
Specifically on Node click of Treeview and on Update button press.
Here is the sample code am trying.
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true" />
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="conditional">
<Triggers>
<asp:PostBackTrigger ControlID="Button1" />
[Code] ....
This upload is working. But why the page is getting refreshed? this is not partial post back and instead it 's full post back. i have read the articles for the fileuplaod with issue inside the update panel. is there any way to achieve this asynchronous upload on button click?
I don't want to use the Ajaxtoolkit Asyncupload because that will upload (Ref : [URL] ....] the moment when we seelct the file itself which i don't want to do that. i need to do on the button click event.
I've got a bit of a problem UpdatePanelAnimationExtenders. Here's an example of the code structure I have:
[Code]....
Now here's my problem. When dd1 triggers the postback both dd1 and dd2 get disabled (instead of just dd1) and after the request is complete only dd1 gets enabled back. The behaviour is also true the other way around (if dd2 triggers the postback both dropdowns get disabled but only dd2 gets enabled back). I'm not really sure what to make of this.
provide me the cascading dropdown code upto 3 levels without using the WebService .
View 1 RepliesI have three dropdowns, the second one is visible only if first dropdown selection is "Sunshine"
I have a blank space between when the second dropdown visible = false
it is possible to avoid this blank space, between the dropdowns.
I have a sample app below
[Code]....
I am trying to call a web service function within my own ASP.net (code behind) using AJAX on the page.
Once i push the button to execute the JS/AJAX/codebehind - I got an error.
POST http://************/admin/Admin.aspx/getDBInformation 500 (Internal Server Error)
This is my code below that I am currently using:
Code:
<WebMethod> _
Public Shared Function getDBInformation() As String
loadDBData()
Return JsonConvert.SerializeObject(dbInfo, System.Xml.Formatting.Indented)
End Function
End Class
The code behind looks like this:
Code:
Imports System.DirectoryServices
Imports System.Security.Principal
Imports System.Net
Imports System.Drawing
Imports System.IO
Imports System.Data.SqlClient
Imports System.Web.Services
Imports Newtonsoft.Json
[Code] ......
How can I correct this issue so that I am able to call **loadDBData()** without that 500 error?
Add rows dynamically to a table and poulate data in cascading dropdowns,I am using ASP.NET3.5,
View 2 RepliesScenario is, I have a tab container inside which I placed 5 tabs and each tab having 4 Cascaded dropDown.Now for changing the tab page everytime refreshed and calling all 5 parent control dropwdown to fill.But can I prevent it in that manner so that for changing the tab only that parent webmethods will be called to populate.In page load itself it will call only the active tab parent Cascading dropdown web method.
View 8 RepliesI have four fields on my insert form: Server, Farm, Silo and Reason. Farm and Silo populate based on the name of the server that is entered. If I take out the SelectedValue='<%# Bind("value") %> the form doesn't error out, but the fields don't post back to the DB.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%@ Page Language="C#" %>
<html dir="ltr" xmlns="http://www.w3.org/1999/xhtml"> runat="server">
<meta content="en-us" http-equiv="Content-Language" />
[code]...
i'm using the Ajax cascading dropdown list it works fine. But how to call the server side after the dropdown list populated....
i don't want to call those method in drop down list index changed because it may cause postback..
I have 3 Cascading dropdowns in a user control. After making a selection i want to clear the values of the selections or make it to select some values that I pass in. The ownCategoryValues does not get reset and everytime the service gets called the knowncategory values is the same.At what point should the knowncategoryvalues be changed to reset the dropdowns
View 1 RepliesAt me is user control. I cannot change its property from JavaScript in any way(SectionName) . I can not understand in what a problem?
ratingElement = document.getElementById('ctl00_MainContent_rating_rating_RatingExtender_ClientState');
function handleStateChange() {
if (xmlHttp.readyState == 4) {
[code]...