Web Forms :: Implement Cascading DropDownList In GridView Control
May 10, 2012
I have two comboboxes say DDL 1 : Artist , DDL 2: Albums and a Gridview containing ( album name, artist name, no.of tracks, year, etc), What I want to achieve is: when an option(artist1) in DDL1 is chosed, then the albums related to DDL1 needs to display in DDL 2 and also it must update the appropriate values in the gridview( artistname, albums(album name -no of songs, year)etc...(language: Asp.net(VB)-Sql server ).
I looked at your article regarding cascading dropdownlists and was really useful but in my case I want to use two drop down lists and a grid view.
I have two dropdownlists inside a repeater. And based on the value I pick in the first dropdownlist the second needs to get populated (both need to be populated from the DB via stored proc). I am adding the code I have so far but it's not complete
I am having two dropdownlist in my project,one dropdownlist for empid, another dropdownlist for month, if the user select the empid, the values are retrieved in the textbox.
In the second dropdownlist, if the user select the month in the dropdownlist it will display the leave details, its all working fine, if the user again select the first dropdownlist that means empid, I want to show the second dropdownlist as select month, how can do this.....
I'm trying to follow this article on cascading dropdown list in a GridView control in edit mode (except I'm using C#) [URL] I keep getting this error message "ProjectID is neither a DataColumn nor a DataRelation for table DefaultView."
I seriously want to learn how to create a custom server control, for that I made a requirement for myself, but lost on how to accomplish it. Requirement -I want to create a cascading dropdownlist control - which should have following properties -1) ConnectionString - used to get data for the 1st dropdown from database, and also it is used by 2nd DropDown to get data.2) 1stSelectCommand - Used by the 1st DropDown to get data from the database.3) 2ndWhereCommand - used by the 2nd DropDown - uses the selected value from the 1st DropDown in the where clause to get data. Methods - 1) DropDown1_SelectedIndexChanged()2) DropDown2_SelectedIndexChanged(3) CustomCascading_Changed() - this happens when any of the DropDowns index changed. PS - This is a random requirement, of course it got nothing to do with any project or real time.I want to learn, so i incorporated basic concepts like Data Access, Custom Methods, Properties etc.PPS - I know how to create basic custom server control, so plz dont forward me links to how to create basic custom server controls. But in case with extrordinary links.
I am making an application that deals with vehicles. I need two DropDownLists:
Makes: All Vehicle Makes Models: Models that belong to the selected value of the Make DropDownList
How is this done in MVC2? My Idea: Do I use an ajax call when my first list is selected and then pull back the Models to bind to the Model DDL? How would model binding come into play that way? UPDATE I posted what I ended up doing as an answer. It is super simple and works great. You can use a get too if you feel so inclined, but you have to specify that you want to like so... return Json(citiesList, JsonRequestBehavior.AllowGet);
i have a table with three columns as ID,baseid,name.
[code]...
i will display all baseid 0 values in first dropdownlist1
based on the selection corresponding values will be shown in dropdownlist2 (like when desc1 is selected desc1212 &desc2323 will be shown in dropdownlist2. now i want to edit/add details to the table from aspx page.
let me know if some body tried to use a cascading dropdownlist inside a formview to be used in update and insert templates.known that my tables are like this:
Section: SecID SecTitle Category: [code]...
I need to create a formview to insert and update all my news but I need a cascading Dropdownlist to select a section and generate the related categories Note that I need to display the Sectoin and the Category Titles
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 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 2 dropdownlists and on change 1st dropdownlist (ddlPlant), the 2nd dropdownlist (ddlCategoryName) refreshes its data based on 1st dropdownlist value. However, the codes does not worked.
I have created two dropdown lists. The 2nd DDL depends for values on the 1st DDL. I have written code on the SelectedIndexChanged event of 1st DDL to change values of 2nd DDL. also i have used detailsview. In the template field i have used 2 DDL mentioned above. they are having SelectedValue='<%# Bind("") %>' property. Everything works fine but when i tried to edit record in detailsview & select value from 1st DDL then it gives me following error.
Server Error in '/' Application. Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidOperationException: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.
I have an ASP.NET/C# web project that uses an Entity Data Model and Entity Framework to interact with my database. I also have a DetailsView control that will serve as the control used to insert a new record. The user will need to be able to select from multiple, cascading dropdownlist controls to determine what parent record this new record will belong to. Here is an example.Say we have an online ordering system with the following hierarchy.
Customers -> Orders -> OrderParts -> Parts
We're going to add a new part to an order, under a customer. Ultimately the orderparts table won't have a reference to a customer, just an order. The order will have the reference to the customer. In the DetailsView for the new orderparts record we will need two cascading dropdownlist controls. One for customer and one for order, since we won't want to view some crazy amount of orders all in one dropdownlist.
However, the customer dropdownlist should not be bound to the detailsview control since there is no field for it. I also don't want to use the AJAX control since I don't want to create a separate web service to provide all of this information to the dropdownlist controls.
I have a .aspx page having two dropdowns, the data to be loaded in them is usually static(but may change everyday), the first dropdown always displays the main categories and the second dropdown is initially empty.
Now, the requirement is:
As the user selects a category from the first dropdownlist, the second dropdownlist should populate based on the selection just made.
The road-block:
This should be done without a postback. My boss wants something like the drop downs on this page.
So what I gather is, I'd have to retrieve the data from the database on page load event, store it in the cache(or somewhere else?), then use javascript to handle the selectedindexchanged event of the 1st dropdown, use the data from database stored at pageload and populate the second dropdown according to the selected value of first dropdown.
P.S.- I'm a beginner ASP.Net C# programmer and have no knowledge of Javascript.
I am new to ASP.NET MVC 2. In my project, there are two selects: one that contains a list of countries and another that should contain the states/provinces/etc for the country selected in the previous select.
Is there any possibility to create a cascading select without using any client scripting?
I am trying to use a solution for a cascading dropdownlist (the selection in one dropdownlist determines the options in the second one) found here:
[URL]
[code]...
how to get a default value for the dropdownlists. Since otherwise the customer dropdownlist will have a value when you first get to the page, but the task list won't...
I am referring to following line from this link [URL] ....
data 'continentId ' 'ddlContinents.ClientID'.val ''
In your code. i tried using this code and facing a tiny problem. In above mentioned code 'ddlContinents.ClientID'.val stores integer value in contentId for obvious reasons but the requirement of my code is different. i want to pass text which is selected instead of id no.for example if mumbai is listed as second option and i select mumbai it should store mumbai in contentId instead of 2 i.e. integer value.
I am trying to implement pagination in my gridview control. Here is the code for databind and pageindexchanged
Private Sub BindGrid() Dim dataTable as DataTable = CType(Session.Item(APPLICATION_DATA), DataTable) Grid.DataSource = dataTable.DefaultView Grid.DataBind() End Sub
Protected Sub OnChangePageSize(ByVal send As Object, ByVal e As GridViewPageEventArgs) Handles Grid.PageIndexChanging Grid.PageIndex = e.NewPageIndex _BindGrid() End Sub
But I get error after Grid.DataBind() as "Unable to cast object of type 'System.EventArgs' to type 'System.Web.UI.WebControls.GridViewPageEventArgs'"
