I have DropDownList with CascadingDropDown extender.
If I want to retrieve data from the database for update to what I should assign the data...... to the dropdownlist or to CascadingDropDown extender and to what properties exactly I should use?
I am trying to populate 3 dropdown lists with using CascadingDropDown. DDLs shows make, model and color respectively. The last DDL is having AutoPostBack = true and I am trying to display the values from dropdown in one label control. I am pulling data from a webservice to populate DDLs. I am not getting any error while compiling but when I run the code it shows Error 500. I am not sure where I am going wrong. I am following the tutorial video of 'How Do I' -
[URL]
I am using C# and .Net framework 2.0. Web Service code looks like this
[Code]....
And Web Page Default.aspx looks like this -
[Code]....
I don't understand where i am getting wrong.
[WebService(Namespace = "[URL]/")]
I am trying to create a cascading dropdown list using two dropdown lists in Visual Studio 2008 Professional connecting to a SQL Server 2008 Standard database on my local machine. I have added the two dropdown lists, as well as a CascadingDropDown extenders from the AJAX Control Toolkit that corresponds with the first dropdown list. The problem I am running into is that despite the fact that I have a CascadingDropDown extender for the first dropdown list so far, and the extender is configured properly, the first dropdown list is showing Unbound in Design view. I also don't see a TargetControlID entry in the properties window for the externder.
I hard coded the TargetControlID to the extender in the Source view and, although I am not receiving any dynamic errors from the TargetControlID entry (meaning, the TargetControlID is a valid parameter, and the dropdown list I entered for that parameter exists on the same page), the dropdown list doesn't populate properly and when in Design view, not only do I not see an entry for the CascadingDropDown extender, but the target dropdown list shows as being "Unbound."
A couple of things I want to point out first:
1) I am using Master pages on this site for the header, footer and navigation. The opening and closing <form> tags, as well as the <ScriptManager> entry are in the Master page, not the content pages. I did this with the assumption that at runtime, each page would have the proper <form> tags and <ScriptManager> entry to function properly.
2) I have been able to add a CascadingDropDown extender to a page in Design view (and it initially displays properly), but by the time I have added all of the properties settings to apply it to its corresponding dropdown list, the entry appears normal in Source view but no longer appears in Design view. When I run the page, the dropdown list does not populate. Obviously, I assume that this is related to the dropdown list showing in Design view as being Unbound, but I don't know how to get the dropdown list to recognize that I have a CascadingDropDown extender that is supposed to apply to it.
Here is what the two elements look like in Source view:
<asp:DropDownList ID="ddlCompany" runat="server">
</asp:DropDownList>
<ajaxToolkit:CascadingDropDown ID="cddCompanies" runat="server" TargetControlID="ddlCompany" Category="Company" PromptText="Select a Company" LoadingText="Please Wait..." ServicePath="~/CompaniesService.asmx" ServiceMethod="GetCompanies">
</ajaxToolkit:CascadingDropDown>
To create these, I have been following Joe Stagner's example in his video on the topic (http://www.asp.net/ajax/videos/use-aspnet-ajax-cascading-drop-down-control-to-access-a-database) virtually word for word. I have set up two TableAdapters/DataSets, one for each dropdown list, and the datasets are able to accurately pull the appropriate data from the database, so I know those are working properly. I believe the problem is that the dropdown list isn't binding with the CascadingDropDown extender properly. It wouldn't bother me that I don't see a TargetControlID entry in the properies window for the CascadingDropDown extender, although I have a feeling that the absense of that property is related to the fact that the dropdown list is not binding to the extender. I searched online for causes to this problem, but I wasn't able to find any solutions.
I use the CascadingDropDown to fill several DropDownList in my web to manage different application access rights
I use the Ajax CascadingDropDown component for that.
My problem is that, depending on the application, the selections criterias of the values in my database will be different.
I would like to know if there is a way to get or to identify the name or the ID of the dropdownlist which execute the CascadingDropdown class in the .asmx part (in the "public CascadingDropDownNameValue[] GetApplication1(...)" class ) ??
The name of the DropDownList give me the code of the application manage use to select my data in my SQL query
I don't want to write several query for each dropdownlist like :
public CascadingDropDownNameValue[] GetApplication1(...), public CascadingDropDownNameValue[] GetApplication2(...) etc ...
as they will be create automatically at the loading of the page.
I have asp.net content page with an update panel, asp.net controls with ajax extenders and it has asp.net button with event click. everything is working ok exept one case. I have 3 DropDownList with CascadingDropDown extenders. when I click the button without selecting anything from DropDownLists then click on the button the event click will work OK but if I select anything my page will respond when I click on the button.I already I added triggers for click button.is there anything I should check to fix this problem???
View 7 RepliesI used below code to set default value for DDL
state.Items[1].Selected = true;
now I use cascading for DDL how I can same thing for cascading?
<cc1:CascadingDropDown ID="CDLdistrict" TargetControlID="DDLDO" PromptText="All"
PromptValue="" ServicePath="../ServiceCS.asmx" ServiceMethod="GetDistrict" runat="server"
Category="District" ParentControlID="DDLzoneO" />
Regarding this example: [URL] .... it works locally, within VS 2012.
But when I publish to a local or remote webserver, it doesn't show an error, but the dropdown lists are populated with this line: [Method Error: 500].
How can i assign value to an gridview extender control properties during runtime in aspx.cs page ???
View 1 RepliesRequirement is:When I click on "Show Modal" button, it should open a ajax ModalPopup with 2 buttons: "Add Node" and "Add Goal"when I click on "Add Node" button, panel 1 should openWhen I click on "Add Goal" button, panel 2 should open.
I tried below code:
HTML:
<asp:Button ID="BAdd" runat="server" Text="Show Modal" ValidationGroup="usrvalid"/>
<!-- ModalPopupExtender -->
<cc1:ModalPopupExtender ID="Modal" runat="server" PopupControlID="ShowPanel" TargetControlID="BAdd" CancelControlID="btnClose" BackgroundCssClass="modalBackground1">
</cc1:ModalPopupExtender>
[Code] ....
But its not showing the panel1 and panel2 on button click(that are inside modal pop up)....
I have a UpdatePanel which is having a Datalist inside it , and in datalist i have a country dropdownlist whose autopostback = true , now it is causing postback which i want to trigger , but i am unable to set it as AsyncPostBackTrigger inside update panel because update panel won't find the dropdownlist as it is in datalist.
View 1 RepliesA run time problem occured in my website. While i was using ajax calenderextender and asp.net2.0 dropdownlist in different rows. Now, when user clicked on popupbutton a popupcalender will open but it was override(overwritten) by dropdownlist which was looking very much odd as a user
View 1 RepliesHow to use watermark(--select--) in dropdownlist.
View 1 RepliesI've build a Modal Popup extender with a DataBound DropDownList. The only problem I've got is that the DropDownList is being filled in the Page_Load. Even when I put the binding in the Load of the Modal PopUp extender there is no data inside my Dropdownlist.What am I doing wrong here? Because everything should work when I hit the TargetControlID.
View 3 RepliesI have have 2 DropDownList controls with CascadingDropDown
I need set data to the first dropdownlist on server side if i do this, and when i get page on client side, the first DropDownList without data that i set on server side
//client
<asp:DropDownList ID="ddlAjaxManufacturer" runat="server">
</asp:DropDownList>
<ajaxToolkit:CascadingDropDown ID="CascadingDropDownManufacturer" runat="server"
TargetControlID="ddlAjaxManufacturer" Category="Make" PromptText="....." ServicePath="../../Ajax.asmx"
ServiceMethod="GetMakes" />
<asp:DropDownList BackColor="white" ID="ddlAjaxModel" runat="server">
</asp:DropDownList>
<ajaxToolkit:CascadingDropDown ID="CascadingDropDownModel" runat="server" TargetControlID="ddlAjaxModel"
ParentControlID="ddlAjaxManufacturer" PromptText="....." ServiceMethod="GetModelsForMake"
ServicePath="../../Ajax.asmx" Category="Model" />
//server
ddlAjaxManufacturer.Items.Add(new ListItem("...", "", true));
ddlAjaxManufacturer.Items.Add(new ListItem("11", "ford", true));
ddlAjaxManufacturer.Items.Add(new ListItem("22", "bmw", true));
The problem is simple, it doesn't fire (show the dropdownlist)
Here's all my code related to it.
Inside my masterpage:
[Code]....
I've compared it to many exemples and all is fine
If I test the service directly, it work
I am unable to get the selected value of the DropDownList. When the user selects a value and clicks OK, the value that was loaded as the default selected value with an index of 0 is available in code behind, not the newly selected value. See the attached code for the dropdownlist in the Modal Popup form.
<div class="well" style="margin: 5px">
<asp:Label ID="lblPlanOptAdd" runat="server" AssociatedControlID="ddlPlanOptAdd">Plan Option:</asp:Label>
<asp:DropDownList ID="ddlPlanOptAdd" runat="server" CssClass="form-control" OnSelectedIndexChanged="PlanOptAdd">
[Code]....
I have three cascading drop down boxes populated by way of a web service. I would like the selection of the third box to then populate the details View based solely on that selection. When I run the page, the DetailsView is populated with every item from the table (using paging) instead of only showing the details of the item selected in drop down. In the database the a field named ItemId is the identity for the table. Am I simply not passing this correctly to the detailsView from the ddl?
Here is an example of what I have so far:
third drop down aspx snippet:
[Code]....
.vb code for dropdown event:
[Code]....
and aspx snippet for details view:
[Code]....
how the dropdown is populated:
[Code]....
GetItems is the following:
[Code]....
I wan to do a required field validation for the cascading dropdownlist . When my page first load out the validator is fired first in the google chrome, the callout extender message is prompt out first in the Google Chrome. I have tested the code in IE and safari, this two browsers never prompt out the validator callout first when the page is loaded.
i wonder why the google chrome will prompt out the validator when i validate the cascading dropdownlist. I have did some research on it, but failed to get any solution.
I got GridView with 2 columns both are Template field with drop down list. What I need to do is someting like when user select course 3/3A/2A/2B , the type column will auto select pratical option dynamically. When select RTT /FTT/BTT , the type column will select Theory option. Can someone tell me how to work on this thing.
<asp:GridView
ID="GridView1"
runat="server"
AutoGenerateColumns="False">
<Columns>
<asp:TemplateField
HeaderText="Course">
<ItemTemplate>
<asp:DropDownList
ID="DropDownList1"
runat="server"
AutoPostBack="True">
<asp:ListItem>2A</asp:ListItem>
<asp:ListItem>2B</asp:ListItem>
<asp:ListItem
Value="3">3</asp:ListItem>
<asp:ListItem>3A</asp:ListItem>
<asp:ListItem>BTT</asp:ListItem>
<asp:ListItem>RTT</asp:ListItem>
<asp:ListItem>FTT</asp:ListItem>
<asp:ListItem></asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField
HeaderText="Type">
<ItemTemplate>
<asp:DropDownList
ID="DropDownList2"
runat="server">
<asp:ListItem></asp:ListItem>
<asp:ListItem>Practical</asp:ListItem>
<asp:ListItem>Theory</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
i have a dropdown list control which gets data from a database. how do i assign a value to each of the item.
View 3 RepliesIm using CascadingDropDown to edit data inside listview edititem template.
Code:
[Code]....
But when i post data its throw error. i found out that posts wrong data:
1:::First Item instead of 1
How i can fix it?
I have a request:((( Now I can use the TextBox auto-complete but my problem that i use (Key/Value) mean that I should display for example the country name and use the country iso code in the code behind.... so how can I do that by using ajax (TextBox or DropDownList)
View 1 RepliesCan I Use CascadingDropDown without WebService?
View 1 RepliesIs it possible to add a new item to cascadingdropdown? I tried ddl_master.Items.Insert(0, "3"), but it doesn't show up. When I view the source in the browser it's there.
<asp:DropDownList ID="ddl_master" runat="server" Width="200" CssClass="ui-state-default ui-corner-all">
</asp:DropDownList>
<ajaxToolkit:CascadingDropDown ID="cdd_master" runat="server" Category="Action"
[code]...
i am using ajax cascading ddl for binding customer, package, device and leadcount.. i need to bind the package by customer, device by customer & package, leadcount by customer & package & device. but we can pass only one value to the webservice method when binding.. but i need to pass 2 or 3 values to the webmethod. how can we do this. also when i select the customer i need to bind all the 3 controls. but in ajax cascadeing ddl we can give 1 parent control id only. i need the solution for this also...
View 1 Replies