AJAX :: Way To Use Two Cascading Dropdownlists With The Same Values
Mar 15, 2010
I'm trying to use two cascading dropdownlists with the same values -- one shows a code, and the other a description. They are sorted alphabetically, so they have the same values, but not the same index. Both are generating correctly. What I am trying to do is set the abbreviation when the description changes (and vice versa).If I use this javascript, it changes on the web page, but I get a null value returned to the form handler. If I comment out the CascadingDropDown control and load the TrickAbbrev from a database it all works.
I have a web app with several groups of cascading dropdownlists. All the cascading dropdownlists work as designed, but now the app is in the live enviroment with multiple users they are getting error 500 messages returned in some of the dropdownlists. Just wondered if there is a set amount of time to populate between selections? As these users are sometimes waiting tens of mins betwen selecting the values.On some of the dropdowns i'm pasing a date to the method using session variable whether this could be the issue? an example of one of the methods is below:
Am using masterpages.I have written following code to add rows to dynamictable with html controls. I need to load data from database in cascading dropdownlists(like country,state);this javascript code is not accepting asp controls.can we load data in cascading html dropdowns? using javascript/AJAX?
I have some cascading dropdownlists using the ajax toolkit I have a set up datatables in an xsd file. Then use these in a webservice to populate all the fields ... this all works great but now i need to pass an additional paramter to the first dropdownlist ( a date) but don't know how to do this? The method is below...
[Code]....
The other code is:
[Code]....
The first change would be to the tableadapter to add a param to the code i.e
AuditWebDS.TeamsDataTable teams = teamsAdapter.GetTeams(calldate);
but how do i get the calldate param to the webservice method... i tried a session variable but it comes up with session is null ? Is there another better way?
Imagine I'm developing a webform with two dropdownlists and a submit button. The second dropdownlist depends on the choice in the first, and both are loaded dynamically using webmethods being called with javascript in de ASPX page (ajax). When I submit the form to the server, to save the data, I can't get the value of those dropdownlists. I think it is because with client AJAX no viewstate data is being generated. I need to send the data to the server and save the webform data, and identify wich data is on each webcontrol.
I have a DetailsView control with several fields that is in insert mode. Three of them are the source of my problems and headaches.
I have three DropDownLists in template fields.
The first one is OK, bound to it's designated field in table1 in the database. The next two however have to change their bound tables according to the SelectedValue.
So far, I've managed to get it working, BUT when I insert the data I've entered, these two DropDownLists are not entered into the database.
DropDownList3 - the list that controls the other two DDLs
DropDownList4 and DropDownList5 - the list that need to change their items accordingly
DropDownList3 has six different values, so I have 6 tables for each of the other two DDLs
However I have only tried with one to see if it would work, that's why the Sub seems incomplete.
Here is the relevant part of the code:
[Code]....
And the DropDownList3_SelectedIndexChanged sub:
[Code]....
If I leave SelectedValue='<%# Bind("shelves") %>' and SelectedValue='<%# Bind("type") %>' in the <asp:DropDownList> tag of the two DDLs that change values, I get an error when the first one does the postback.
The error is:
Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control. This error, I spent a whole day looking through forums and knowledge bases, but I could find nothing that solves my problem. Maybe the problem is me, but my boss wants this done, despite it is not my area of expertise to write code.
I have 3 cascading dropdowns in a user control. I am trying to clear off the values of the dropdowns on the click of the clear or cancel button on the page. I am setting the value as selected index as 0 but the last dropdown never gets disabled. How do i achieve that. Is there a way that i can set only the first dropdown and the rest of the dropdowns get disabled.
I'm wanting to maintain the dropdownlist values that were selected when i use postbackurl with a button. They cascading dropdowns are on a masterpage in an accordion pane. I select the 3 vales in the ddl and then presss a button which redirects to the new content page.
I've been able to get the values using previousPage.master.fincontrol... but am then setting the selectedValue in the page_init of the conent page, but they aren't set when the page loads... does anyone know where to put the code to set the values?
I have 3 cascading dropdown lists in an update panel. To submit the values of cascading dropdown without error it needs to turn eventvalidation off. Is there any way that i can avoid turning off the event validation and still use cascading dropdown?
I've got 3 SqlDataSource controls, and 2 dropdownlists and 1 detailsview on a page. The first SqlDataSource is associated with the first dropdownlist, and second SqlDataSource (which is filtered based upon the selection chosen in the first dropdownlist) is associated with the second dropdownlist and the third SqlDataSource (which is filtered both by the selection of the first dropdownlist and the second dropdownlist) is associated with the detailsview. The idea is the user selects something in the first dropdownlist, and it is supposed to update what is returned by the second SqlDataSource control and second dropdownlist, and that in turn is supposed to change what is returned in the third SqlDataSource control and it's associated detailsview. All of the dropdownlists have AutoPostback set to True.
I have a detailsview with template fields. when i go into edit mode i am trying to set the selectedvalue of a dropdownlist to be the value of the corresponding label from the item template in code behind as once i go into edit mode i loose the initial value from the detailsview and the dropdownlist defaults to the first listitem. what i am doing is onDataBinding of the detailsview i access the cell value of the label , i then assign that to a public variable but once i've exited the routine the public variable looses the value of the detailsview cell i've just assigned to it. this is the value i'm hoping to assign to the selectedvalue of the dropdownlist when i go into editmode. The reason i'm doing it this way is although i can use bind in the html to mantain the dropdownlist selected value between detailsview states once i come to update the detailview i get the following error
Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.to work arround this i've had to assign the values to update paramteres also in code behind. here's my code behind page i've bolded the routines in question. drpDataStoreDDL is the variable in question.
I have a FormView in InsertItem that contains one DropDownList linked to a Table Datasource to display ItemCodes. In that "lookup" table I also have a Retail and Cost field.When the user selects the item from the drop down, how can I have these to field carry over into my new record that is being inserted. The new record also has a Retail and Cost field that are TextBoxes.Basically I am populating the new fields with the default values from the DropDownList.
This is my table ... I am retriving the values of "FROM"  and "TO"  based on the id .. Separate Dropdownlist for FROM & TO . While Displaying , in  "TO" Dropdownlist NY value is repeated twice .. How to remove the duplicate value? need vb coding frnz ...
Basically the scenario is like this, I'm getting an XML from a 3rd party application with available dates for booking, for each day there are types of rooms the person can choose, single, double, etc.
Each hostel will return me an unknown number of room types. But dont get too confused with this. The thing is simple I just need to add an unknown number of dropdownlists (or HTML Select) with the numbers of persons to book for. Now because I don't know how many of those dropdowns I will have I need to add them programatically inside a "for int i=0; i
How can I add an unknownn number of dropdownlists programatically to a page and retrieve the selected values with c# on submit?The last column on the screenshot
http://i.imgur.com/37chw.png
Update:I'm creating the code from the xml results as a string that will print as html code:
I know that doing that and adding the runat=server won't help on my control, there is where my main problem is now, how to add the code on the html to be able to get the dropdownlist selected value later with c#. Can I do that with Request.Form ? was trying but so far I couldnt do it.
I have 3 cascading dropdownlists. Everything works OK EXCEPT whenever I change the selection in the dropdownlist, the old values from the previous selection are added to the new values (specifically DropDownList id=InstructorList and CourseNumberList)
ASPX page, <asp:AccessDataSource id="CourseNameSource" Runat="Server" DataFile="r:angel_file_storageCourses.mdb" SelectCommand="SELECT DISTINCT CourseField FROM (SELECT Mid(CourseField, 1, 4) AS CourseField FROM Course_Load) ORDER BY CourseField"/>
I have an accordion and a nested accordion as a menu ba on left. thepanes contain various controls mainly dropdownlists. I disable the accordion after a user has enetered some values and clicked the search button. However in IE7 the accordion is disabld and all the contained controls are too. But in IE6 the dropdownlists aren't disabled whats the reason behind this and whats the solution?
I am new to Ajax Control Toolkit, with the help of online tutorials I had created a cascading dropdown list in asp.net and tested it on my local machine. For this dropdown list data source would be an xml file (which is saved on my local machine c drive). I haven't encountered any issues until I deploy the precompiled web site on to IIS 7. When I open the web site from IIS I would see the two dropdown boxes on the web page with an error "Method error 500". I believe this error occured due to incorrect xml file path provided on IIS. I had copied xml and xsd files into IIS server C drive but it did not help out and then I created a network map and placed the xml and xsd files in that shared folder tried to access that path from web service, it's working on local machine but not on IIS. It would be great, if any one could explain me the solution.
I'm wondering how I can make one dropdownlist affect another one.. For example...You select your country from a drop down list of countries. On selecting it, another dropdown list becomes visible and displays the states of your country. I'm taking this data from a database, so it merely has to link to a different table for each country selected.
Also, I want the option of being able to add a 'state' to the database from the webform by typing whatever its called into the combobox so that future users will see that option.
I tried cascading dropdown in asp.net using ajax. I have tried with 3 dropdown control. The scenario is First dropdown is loaded when page gets loaded and the second dropdown is loaded based on first is selected and thrid dropdown is loaded based on second one selected, now I want to know how do I load third dropdown based on first and second selected value...
