AJAX :: Using Cascadingdropdown To Update Detailsview
Nov 9, 2010
I have two sets of cascading drop down lists they are contained in a detailsview <edititemtemplate>. The problem is that when the user clicks update; the original data is wiped out and the user has to redo the selection of all items contained in a cascading dropdown even if the user didn't want to change that particular aspect of a record. If the user doesn't select everything an error is thrown by the stored procedure in regrds to null values not being valid.
Is there a way i can use cascadingdropdown so that the current values are visible when the user clicks update; meaning that they don't have to redo selections for all items involving drop down lists. The current selections would be default values.
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Similar Messages:
Feb 20, 2010
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]....
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Mar 15, 2010
i have a religion dropdown1 , on this selectedindexchange i have to populate castes into the listbox(not dropdownlist).
i am unable to use cascadingdropdown as it is tightly binded with dropdowns.
please guide me how do i update listbox items based on the dropdown selected value using ajax.
i tried with pagemethods getting the dictionary object using JS function and thought of binding it.
but i am unable to bind the list.
//html code
Religion
<asp:DropDownList ID="ddlReligion_RS" runat="server" TabIndex="6" onchange="GetCastes_RS(this.value);">
</asp:DropDownList>
<br />
Caste
<asp:ListBox SelectionMode="Multiple" ID="lstBxCst_RS" runat="server">
</asp:ListBox>
//js function
function GetCastes_RS(relgnID)
{
abc.BLL.Services.AjaxService.GetCastes(relgnID,
function (resp)
{
var ddlCaste= document.getElementById("<%=lstBxCaste_RS.ClientID%>");
ddlCaste.length=0;
var castesList = resp;
alert (resp);
if(castesList.keys.length >0)
{
for(var i=0 ;i< castesList.keys.length;i++)
{
op=castesList.keys[i];
ddlCaste.options[ddlCaste.length]=new Option(castesList.values[i],op);
}
}
},
function(val)
{
alert(val.get_message());
}
);
}
i could call the webmethod, but i am getting this error in javascript.
Type 'System.Collections.Generic.Dictionary`2[[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089]]' is not supported for serialization/deserialization of a dictionary, keys must be strings or objects.
when gone thru few links i have seen few examples supporting dictionary object , why not in my case?
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Dec 14, 2010
I have a form for our staff to list an event in a calendar system. In the form, there is a DDL for their Department, and a CasscadingDropDown that provides a list of staff members (the staff list is filtered by Department, as chosen in the first DDL). When the form gets submitted, I need to store the selected values of both DDL's (DepartmentID and StaffID, respectively) into the database.
So, I have a DetailsView, and am using the InsertItemTemplate. Now, I can get both DDL's populated correctly (with the cascade working correctly), and I used custom DDL's derived from the standard DDL class to avoid any Postback/EventValidation problems. But I can't seem to get the values of the user's selected items so I can save them back into the database! I've tried many different approaches, but all I seem to get returned is a value of "".
Here's what I have so far...
[code]....
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Apr 8, 2010
I've been following the tutorial from (hxxp://mattberseth.com/blog/2008/04/masterdetail_with_the_gridview.html), and trying to implement it in my web app.
I get details view showing up with right data and in edit mode, but when I try to update I get following error:
Error: Sys.WebForms.PageRequestManagerServerErrorException: Could not find a row that matches the given keys in the original values stored in ViewState. Ensure that the 'keys' dictionary contains unique key values that correspond to a row returned from the previous Select operation'Source File: http://localhost:60402/ScriptResource.axd?
d=3oiN1MDGJVpGswd12OLVOJgMLkGU5WbI3vBe1TTtzf4yTJhIhsSkkCJOlM3EDqJ-SuCssTKwPcNsExJPGVKVXA2&t=ffffffffa10539b4
Line: 1678
I am using LinqDataSource (in tutorial above, author is using ObjectDataSource).Here is aspx
[Code]....
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Mar 10, 2011
I´m using a AsyncFileupload control inside a detailsview. When the file is uploaded i need show a control that is hidden in detailsview.
I´ve tried to use OnUploadedComplete evento to do that but it doesn´t work. How can i get this?
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Mar 17, 2010
In code-behind I can do this to select something:
// Select item in first DropDownList
myCascadingDropDown_1.SelectedValue = itemValue_1+":::"+itemText_1;
// Select item in second DropDownList
myCascadingDropDown_2.SelectedValue = itemValue_2+":::"+itemText_2;
How can I do this in JavaScript?
EDIT:
I can select my desired item in the first dropdownlist. The problem is however, that new values based on that selected item (it is a CascadingDropDown, remember?) don't show in the second dropdown so I can't select anything there. I would need to somehow invoke the update method of the second dropdown manually.
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Jun 12, 2010
My Master/Detail view is working fine, but if i try to add Modal PopUp extender it does not work at all.
[Code]....
adding Modal Popup to this code. I have studied [URL] article many times but could not find problem with my code. My code should display Modal PopUp 2 times. Once New Client btn is clicked & other time when edit inside GridView is clicked.
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Feb 4, 2011
I have a gridview and when i click on the edit button i will get the modalpopup window which is having a popup window i want to update the data in that details view and refresh the data into gridview also.
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Nov 16, 2010
I have a page that binds data from DB to a DetailsView.I want to use the auto-generated Update command.
Everything went OK, and also updating was successful, but if I remove any field that I don't want to have chance to update, then the Update command doesn't update! the old values retain!
I mean: if all of the fields are present in the detailsView, the update will be OK, otherwise, the update will NOT update any thing.I've tried to mark the fields that I don't want to view as "Visible = 'false'" but with no good results!
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Jan 31, 2010
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)
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Feb 2, 2010
Can I Use CascadingDropDown without WebService?
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Nov 23, 2010
Is 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]...
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Jun 17, 2010
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.
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Mar 19, 2010
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...
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Jul 1, 2010
I've implemented a cascadingdropdown solution using the demo video here on ASP.NET.
Below is my code for one of my sub-categories. I want to have my sub category controls hidden and only show them if there are sub-categories (not all categories have sub-categories)
So, my question is how to get the count of the subcategories returned by method below and turn on the visibility of the dropdown control from the web method?
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Jan 27, 2011
I'm using a CascadingDropDown in my page and I need to do the following things :
- Getting the list of elements in the dropdown
- Setting a specific value to the dropdown if it exists in the list
I am a total noob in webservices and javascript so I would like to do this in the codebehind but when I try to get the items of my dropdown, the only one returned is the one that is selected on the client side.
Is there a way to get the full list from the codebehind?
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Mar 2, 2011
I already used the search, but without success.
I want to use a CascadingDropdown inside an Accordion.
The ParentControlID for the CascadingDropdown is in pane1 and the CascadingDropdown in pane2, but it won't work.
When I put them both into one pane it works. But separated into two panes it doesn't work.
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May 19, 2010
I have big problem with the CascadingDropDown. I have 60 CDD with one "Child". So on the page are 60 Parents and 60 Childs. When i use FF3.5 everything works fine when he is the only Browser which is connected to IIS
When i use FF3.0 i get Methode ERROR 403 and 500
When i use IE6 i get Methode ERROR 12030 or 403 or 500
When i use Google Chrome no ERROR no content in the List!?
When i use IE8 sometime it works sometime not!?
This errors are not shown on every DropDownList (but on most of them!) I played with the "<jsonSerialization maxJsonLength="50000000" />" in the Web.config which seams to make it work a little bit better.
What can i do to get the CDD working?
I think it is a timing problem. The CDD are not filled in the order i placed them on the page. Local it works better then remote.
Can you help me?
This is my WebService:
[Code]...
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Jun 13, 2010
I have the method 500 error problem, I have tried to do a simple reproduction of the problem still the same, if I run the webservice [URL] it returns the values needed ok (5) in xml format, but the dropdown always return error 500 inside, here are the codes (Using VS2008, NF3.5, Windows 7), I have the whole day trying to solve this but I just can't:
[Code]....
[Code]....
[Code]....
[Code]....
'WEBCONFIG
[Code]....
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Aug 19, 2010
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]/")]
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Dec 26, 2010
I downlaoded the sample code accompanying the "Cascading Drop Down Control to Access a Database" AJAX Toolkit video, and added the datasets from the sample code to my application running in VS2008 and AJAX 3.5. I think the sample code is in a prior version of AJAX.
When I ran my project I used to get Method Error 500 and after 2 days of searching the web could not get a solution. Finally by chance I recreated the datasets fresh in my app using the wizard as shown in the video and the error dissapeared and the cascading drop down worked beautifully.
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Nov 6, 2010
I am new to Ajax and i wanted to use the CascadingDropDown to get rid of the postbacks. But somethings wrong and when i debug i am not running any code from the Web Service for some strange reason.
this is my code in the .aspx file:
<asp:ScriptManager ID="ScriptManager1" runat="server">
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Feb 18, 2010
I am using CascadingDropDown the problem is that the parent of it is not dropdownlist its a textbox.
can i set ParentControlID to a textbox or any other control like a gridview selected row? if so, then how to do that? i tried setting ParentControlID to a textbox but did not work,
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Mar 16, 2010
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???
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