Dropdownlist Selectedindexchanged Event In Mvc


protected void ddlCiclo_SelectedIndexChanged(object sender, EventArgs e) { //algo aqui } Qual seria o equivalente em ASP. In the same way, you can write your JS functions to handle client-side events. Learn how to add this feature programmatically to ASP. C#: protected void ddlstate how to read XML file and display data using asp. Bind DetailView onSelectedIndexChanged event of Gridview --Example of onSelectedIndexChanged event in ASP. com ( Learn more ) This section provides detailed information on how to use DevExpress products for ASP. If you see in above dropdownlist control, we do not have any JavaScript method called on OnChange event. Net with ASP. I was using a Dropdownlist in a PagerTemplate fill with Documents Number. NET MVC dropdown works in UI for ASP. The AsyncPostBackTrigger needs to be specified in the AJAX UpdatePanel in order to fire the SelectedIndexChanged event of the DropDownList using Partial PostBack. Access a value using SelectedIndexChanged() event when a row in a GridView control is selected There are many instances when the value in a cell is required. In this scenario, the SelectedIndexChanged event of the dropdownlist used to select the grid's datasource would be fired before the grid's CRUD events. DropDownList. DataGridItemEventArgs e). Hi, I have a situation where I had to set the seleted index property of the DropDonwList dynamically at runtime. Hi, I'm having an asp dropdownlist with selectedindexchanged event. That means, it comes to the Page Load again on selection of any Option and calls the BindDropDownList(). NET Forums on Bytes. My problem is when user goes back and makes another selection on first (parent) DDL (note that it's not a postback event, since user did not leave the page yet!! OR is. So, when ever a selection in the dropdownlist changes, the webform is posted back to the server automatically. How can You call dropdownlist selectedIndexchanged on PageLoad event? protected void Page_Load(object sender, EventArgs e) { //call the DropDownList1 selectedindexchanged event manually. 关于dropdownlist的SelectedIndexChanged的问题 我在页面上添加Dropdownlist且在SelectedIndexChanged时间函数下写了rnResponse. textchanged event; When user change text of dropdown list. SelectedIndexChanged. datalist tutorial get search data from the database sql server using dropdownlist selectedindexchanged event. Now in the code behind file (. SelectedIndexChanged event is raised when the dropdownlist control item selection changes between posts to the server. I guess you can follow this code. Here in this example i am going to create a page for update Person details where List of person show in a Gridview with the following fields Person ID, Person Name, Address, State, and city. But it doing postback but I don't want postback. NET Core DropDownList example to find out how events are triggered in the drop down listcontrol. As we all know xml file can be used as a Data Source and it’s a free and fastest way to travel data. NET Web Forms (Classic). 6m developers to have your questions answered on Trigger change event manually of Kendo UI for jQuery DropDownList. Example of cascading DropDownList | ASP. DropDownList Selected Index Changed Event: In above View sample, the dropdown list has an on change event and that will hit JavaScript method SelectedIndexChanged(). In below Index view I have created a DropDownList and use a Model property to fill the items in DropDownList. Dynamically Created Dropdownlist Does Not Fill The Licencee May 21, 2010. Introduction: In previous articles i explained How to Fill Country,State,Cities in the DropDownList and Ajax TabContainer example to create multiple tabs/panels and Ajax Accordion example to create Vertical DropDown menu in asp. C#: protected void ddlstate how to read XML file and display data using asp. Telerik ASP. You wrote that your ASPxComboBox selected the default item after a round-trip to the server. DropDownList SelectedIndexChanged Event does not fire and when selecting a new item the dropdown reverts back to 0 (first item). Net with ASP. NET MVC seems not very straight forward. I have placed a dropdownlist in the header template of a column from my AspxGridView. For more information about how to handle events, see Handling and Raising Events. NET Core MVC para um DropDownList?. i want to retrive item from combobox when i selected. How to get a WebDataGrid cell value in DropDownList_SelectedIndexChanged event? I have GRIDVIEW in ASP. Part 35 How to set an item selected when an asp net mvc dropdownlist is loaded. 10-B Taskand Marg, Near Patrika Chauraha, Civil Lines, Prayagraj, UP, India-211001. Take a look at this ASP. However, the Session lookup table is global, and it is not capable to store the argument values for separate instances of the NotesControl. SelectedIndexChanged event of a DopdownList in a Gridview templatecolumn not firing. THE SELECTED DROPDOWNLIST DATA IS REQUIRDE TO BE DISPLYED IN A GRIDVIEW. You can add SelectedIndexChanged event for the child dropdownlist inside the datagrid in the ItemCreated event of the datagrid private void Datagrid1_ItemCreated(object sender, System. When the selectedindexchanged event is fired, I store the viewstate in a dataview and filter it by the value of the radio button which checked property is set to true. NET MVC 3 DropDownList selectedindexchanged. This is a very pared down version of my code, but it contains the problem areas. NET Web Forms Server Controls. I found something about the EnableViewState property. NET DropDownList control Example output is: DropDownlist control SelectedIndexChanged event in asp. Take a look at the The general technique of using the Init/Load event handler article on DevExpress. Is there any way I can detect this change on the client and fire the selectedindexchanged event on the server? thanks. Okay, the onclick event from last chapter was easy, but let's try creating all the code required to use an event from scratch. The SqlDataSource arguments of the dsNotes were bound to the Session. The DropDownList control is bind to the data source on the grdvCategoryList_RowDataBound event of the grid view control. plz mail to me at [email protected] and when the selection changes it doesnot invoke the event. Join a community of over 2. net c# example code demonstrate us how can we make the DropDownList first item to non-selectable. Grid within a dropdownlist Sample Code in C# or vb. HTML Markup : Add Gridview to HTML Page. It executes on the server and generates output to the browser. Value Case 0: Label1. 6m developers to have your questions answered on Size of DropDown of UI for WinForms DropDownList. Net,MVC,AngularJs,Jquery,Javascript,Sql Server AND WCF snippets and tutorial Asp. But since doing so - the selectedindexchanged event is not firing (I guess because without view state the control does not know if there was a change in the. SelectedIndexChanged. Here is the html code which is used to bind the SelectedIndexChanged of the dropdownList with the code behind event handler. Get form data: asp:checkbox, asp:DropDownList, asp:TextBox (VB. Solution: Model: First you need to create a class in the Model. Implementing AutoPostBack in ASP. 我的页面是用几个用户控件组合在一起的,后来我把有Dropdownlist 的那部分独立出来测试发现. Such event is the SelectedIndexChanged. NET MVC? 705. I also used Updatepanel but after that the action what I want its not happening. NET Controls and MVC Extensions > ASP. Suppose you need to display the states stored in the DropDownList that are dependent upon on the selected value in another DropDownList named Country. The session variable was set up to try to hold the info for the update, but the method. Although modifying the editor's item collection may also indirectly change the SelectedIndex property value (e. MvcHtmlString DropDownList (this System. In this Blog, we will learn how to get the current Row of GridView inside the SelectedIndexChanged Event of a DropDownList present on the GridView itself and then find the other DropDownList and bind that. Referencing Controls in Grid Row Edit Form. Net controls in a GridView column. net) Sub DropDownList1_SelectedIndexChanged(sender As Object, e As EventArgs) Select Case DropDownList1. Skip to content @JaredMeredith. SelectedIndexChanged Event of Dropdownlist on a DLL. I have a ddl in a template column of a data grid. Cascade DropDownList example to fill city,state and country. Selected Index Changed event for asp:DropDownList (VB. Sorry for that one. Following code explains how to handle dropdown list SelectedIndexChanged event which is placed inside a grid view control in asp. Keyword Research: People who searched dropdownlist default value also searched. The DropDownList control is provided as a server control. Write a handler for the SelectedIndexChanged event to perform tasks in response to an end-user selecting a different item from the editor's list. So, the problem is that i need to save the both values of DropDownLists to a database, i can do easily for the first DropDownList , but how to capture the second value ( DropDownList2. No Ajax requests are made. Whenever the first drop down selected then another drop down will be disabled. NET and Csharp In this article you will see some guides to work with checkbox and checkboxList using asp. Okay, the onclick event from last chapter was easy, but let's try creating all the code required to use an event from scratch. Using Forums > Off-Topic Posts (Do Not Post Here) Dropdownlist in MVC. Net Dropdownlist Gridview VB. Value Case 0: Label1. The SelectedIndexChanged event occurs when the user selects a new item in the drop-down list. That means, it comes to the Page Load again on selection of any Option and calls the BindDropDownList(). Rate this: me how to hide some textbox on dropdown selectedindexchange event in mvc5. The MVC Dropdown Edit includes an edit box to display editor values (defined via the Text property) and a button to activate a dropdown whose contents can be templated. NET MVC? 705. binding dropdownlist in. I'm having no luck though getting an event to fire when the user selects a new value in a row's ddl. NET Web Forms. Grid within a dropdownlist Sample Code in C# or vb. Value)? this is a part of my code. The following HTML Markup consists of an HTML Select DropDownList. How would I get the previous item on DropDownList before OnSelectedIndexChanged fires the event? I had a DropDownList that has names as its items ("John", "Mark"). net mvc application using razor view engine. But before that we need to cast the sender of the object who triggers the event to determine which DropDownList is triggered within the GridView row. Googling should find examples of both. Web User Control DropDownlist Control Event not working. C# - Why DropDownList. Join a community of over 2. Binding those data from database or custom collection in ASP. the idea is to display data in the griview depending on what is selected in the dropdownlist. I have a very simple Web form with two drop down controls. We display ASP. [Solved] Fire DropDownList SelectedIndexChanged event without reloading page in ASP. How to get a WebDataGrid cell value in DropDownList_SelectedIndexChanged event? I have GRIDVIEW in ASP. NET MVC DropDownList example to find out how events are triggered in the drop down listcontrol. I have placed a Dropdownlist inside a Grid View in Default. NET DropDownList control Example output is: DropDownlist control SelectedIndexChanged event in asp. For example, when we need to display more information about the selected row. you can do post back using javascript method __doPostBack and call the selectedindexchanged event in this method by passing 2 parameters. I tried creating a custom control with a commandname property but that still didnt seem to trigger rowcommand. The SelectedIndexChanged event is raised when a row's Select button is clicked, but after the GridView control handles the select operation. Net Web Application To ASP. The textchanged event doesnt fire after i enter any value. Th problem is the SelectedIndexChanged event for the dropdownlist is not firing. NET MVC Controls ). In this post we will see the easiest example :- 1) To fill the DropDownlist from database. DropDownList Selected Index Changed Event: In above View sample, the dropdown list has an on change event and that will hit JavaScript method SelectedIndexChanged(). In this gridview control we edit particular gridview row data through this DropdownList selectedIndexChanged event. Below is the HTML Markup of the page. Net MVC, please refer my article. NET using VB. Today we'll learn to work with the DropDownList in the MVC 5 using jQuery. GridView1_PageIndexChanging Event; Gridview_RowDeleting Event; Gridview_RowCanceling Event; Gridview_RowEditing Event; Gridview_RowCommand Event; Gridview_RowCreated Event; Gridview Row_DataBound Event; Gridview Total For Current Page; Convert commaString To Int Array; Convert Int Array To Comma Strings. For some reason it is not firingi have set autopostback to true. Utilizar o HtmlHelper para criar um DropDownList em uma View do ASP. I'm paging using webgrid in ASP. Posts about Sql Server written by A2H we will be using the SelectedIndexChanged event in dropdown list and then load the data in dropdown list. I had the same problem, the SelectedIndexChanged event not fired. SelectedVal. Can someone pls help me ? I have an ASP. Hi, I'm having an asp dropdownlist with selectedindexchanged event. Take a look at this ASP. The SqlDataSource arguments of the dsNotes were bound to the Session. The DropDownList will be placed inside a Form and when an Item (Option) is selected, the Form will be submitted using the JavaScript onchange (SelectedIndexChanged) event handler of the DropDownList in ASP. DropDownList SelectedValue inside SelectedIndexChanged Event does not give the current Selected Value, rather it gives the Default Value or first Option Value. The event handler function context (available via the this keyword) will be set to the widget instance. However, it's not posting back. Here in this example i am going to create a page for update Person details where List of person show in a Gridview with the following fields Person ID, Person Name, Address, State, and city. When the User changes the dropdownlist, the SelectedIndexChanged is not firing for that dropdownlist. Cascade DropDownList example to fill city,state and country. In this blog, I’m explaining how to make dropdownlist using bootstrap in asp. You can create a custom column class that replaces the filter text box with a drop-down list. Qtal, tengo un problemita con el evento SelectedIndexChanged de un DropDownList y es que no me ingresa al manejador cuando selecciono un item que tiene el mismo value del actualmente seleccionado. This entry was posted in ASP. SelectedVal. Note: For beginners in using ADO. This demo shows how the cascading ASP. net using C#. In this example I have used the DatabaseFirst approach. The SqlDataSource arguments of the dsNotes were bound to the Session. AutoPostBack property get or set a value indicating whether a post back to the server automatically occurs when the user changes the dropdownlist item selection. It's necessary to keep a button and then click on it then get the item through click event(by writing code to return item in click event). DropDownList. But I don't want this. I use SelectedIndexChanged event to populate the second DropDownList. Get WebGridView row from dropdownlist selectedindexchanged Roger Tristan posted 5 months ago okay so in a typical gridview (Microsoft ASP. NET MVC: server—The data is serialized to the client. NET Core DropDownList component R2 2018 Release is here - now with modern UI for chatbots and more!. I want to create a DropDownList control at runtime and then be able to access the SelectedIndex of that newly created DropDownList. Dropdownlist. I tried creating a custom control with a commandname property but that still didnt seem to trigger rowcommand. Archive for category Asp. As you can see I am dynamically adding a DropDownList to a panel which is inside an update panel. NET MVC, Products: MVC Data Editors, Type: Question, Subject: Does MVC CheckboxList has the SelectedIndexChanged event Q505727 - Does MVC CheckboxList has the SelectedIndexChanged event | DevExpress Support Center. 6m developers to have your questions answered on Trigger change event manually of Kendo UI for jQuery DropDownList. Telerik ASP. Dropdownlist Losing Value On Postback. i search on internet to solve this problem. I tried using dropDownList. This property is not related to the SelectedIndexChanged event. Returns a single-selection select element using the specified HTML helper, the name of the form field, and the specified list items. •"Controllers" in a MVC based application are the components responsible for handling end user interaction, manipulating the model, and ultimately choosing a view to render to display UI. here in this example On the basis of selected Country corresponding States will be filled in the State DropDownList and on the basis of selected state corresponding cities will be filled in City DropDownList. MVC Dropdown onchange load another dropdown. NET Technology. here is my code:-. For demonstration purposes, an integer Property Editor is implemented in this example. DropDown List Selected Index Change Event In MVC 3 Razor View: < script type ="text/javascript"> script type ="text/javascript">. net mvc application using razor view engine. I can able to bind the values to the dropdownlist. NET MVC Razor views, with an emphasis on producing functional HTML forms with a minimum amount of code. DropDownList SelectedIndexChanged event not fired when programatically setting SelectedValue. here is my code:-. This demo illustrates the use of the DevExpress MVC Dropdown Edit and List Box editors to emulate a combo box - allowing end-users to select multiple items from a dropdown list. •"Controllers" in a MVC based application are the components responsible for handling end user interaction, manipulating the model, and ultimately choosing a view to render to display UI. i want to retrive item from combobox when i selected. Note: For beginners in using ADO. NET MVC General Discussions. Learn how to add this feature programmatically to ASP. net) Sub DropDownList1_SelectedIndexChanged(sender As Object, e As EventArgs) Select Case DropDownList1. Demo for events in ASP. so i write a tip about that topics. Master/Detail DropDownList and DataGrid and I think the problem is on selectedIndexChanged event of the dropdownlist coz I am suppose to be selecting a category. 6m developers to have your questions answered on Trigger change event manually of Kendo UI for jQuery DropDownList. Problem: Suppose wehave a collection and one field is type string contains some special character (like [email protected]#$%) and we don’t want these special character. Widgets / DropDownList. I'm paging using webgrid in ASP. I have a requirement to update the second dropdownlist based on the value selected from the first dropdownlist. Net DropDownList SelectedIndexChanged event not firing Make sure you have set AutoPostBack = "true" and also defined SelectedIndexChanged event for the. FacebookTwitterLinkedInIn this example, we will explain how to bind a DropDownList in ASP. RowsPerPage property webgrid i want to choose in DropDownList. It is intended to help developers who are working to improve their proficiency with some key technologies. Cascade DropDownList example to fill city,state and country. The SelectedIndexChanged event occurs on the client side, whenever selection is moved between items within a list editor. Net DropDownList and an ASP. you create a dropdownlist from an enum in ASP. I have loaded a DropDownList in the first row of the child gridview and have loaded checklists in all other rows of the child gridview (I hid the checklists in the first row and the dropdownlist in all other rows). Net MVC in Client Side and Server Side. Perhaps there is. Introduction: In this article I am going to explain with example How to get DropDownList selected value/item and based on that value fetch the detailed data and show/display in GridView and Label/TextBox controls in asp. SelectedIndexChanged is a webforms concept, it doesn't exist in MVC, you'll need to generate your own javascript to submit the form when the values change, or just use a pure ajax solution. How To Create MultiColum Dropdownlist using DropDownExtender Control SelectedIndexChanged Linq WCF Ajax Article WPF node. I have taken 3 dropdownlists in gridview when i select the value in first dropdownlist then accourding to that value i should bind 2 and 3 dropdownlists. Join a community of over 2. NET MVC Dropdownlist Demo R2 2018 Release is here - now with modern UI for chatbots and more!. Now, according to the Event Life Cycle rules, when you select an Option from DropDownList, it Posts Back and goes to Page Load Event first and then it comes to the SelectedIndexChanged Event. The following asp. Access a value using SelectedIndexChanged() event when a row in a GridView control is selected There are many instances when the value in a cell is required. The topics in this section provide comprehensive information on using DevExpress ASP. The event is not fired when the value of the widget is changed programmatically. this is so much similar to selectedindexchanged event and code will be almost same. AutoPostBack property get or set a value indicating whether a post back to the server automatically occurs when the user changes the dropdownlist item selection. NET and I seem to have problems with events This time it is the DropDownList SelectedIndexChanged event that is not firing. As we all know xml file can be used as a Data Source and it’s a free and fastest way to travel data. I have created a DropDownList at runtime using c#. Now I will explain how to get dropdownlist selected value using JavaScript in asp. ==>> In this post I explain how Get Selected Value on Dropdownlist selectedindexchanged event using JQuery this is help us for get value of dropdown without any page post back in asp. Value)? this is a part of my code. net We use the onchange event in the java script for get value of dropdown on Dropdownlist selectedindexchanged event in JavaScript. Problem: Suppose wehave a collection and one field is type string contains some special character (like [email protected]#$%) and we don't want these special character. ddStates_SelectedIndexChange says to populate ddCounties. As we all know xml file can be used as a Data Source and it’s a free and fastest way to travel data. NET MVC? 705. Here Mudassar Ahmed Khan has explained with an example, how to implement DropDownList SelectedIndexChanged event in ASP. However, the Session lookup table is global, and it is not capable to store the argument values for separate instances of the NotesControl. NET DropDownList - easy to use, high performance, templates, client-side binding, Odata. NET server control counterpart: the DropDownList. Notice we are sharing the same event handler (DropDown_SelectedIndexChanged) for all DropDownList controls. NET AJAX UI for ASP. Today we'll learn to work with the DropDownList in the MVC 5 using jQuery. I was using a Dropdownlist in a PagerTemplate fill with Documents Number. In previous article I explained Fire Dropdownlist selectedindexchanged event and many articles relating to JavaScript. Telerik ASP. I have created a DropDownList at runtime using c#. I want, when user focused an element of dropdownlist, SelectedIndexChanged event will not be triggered, and pressing enter or left mouse down events will trigger SelectedIndexChanged event only. Net DropDownList SelectedIndexChanged event not firing Make sure you have set AutoPostBack = "true" and also defined SelectedIndexChanged event for the. you can do post back using javascript method __doPostBack and call the selectedindexchanged event in this method by passing 2 parameters. Text = "You got Grade E!". After populating the DropDownList from Sql Server 2005, giving it an ID, setting AutoPostBack = true, and setting its SelectedIndexChanged property to point to the Event, the DropDownList posts back but it never hits the SelectedIndexChanged Event. ==>> In this post I explain how Get Selected Value on Dropdownlist selectedindexchanged event using JQuery this is help us for get value of dropdown without any page post back in asp. I'm having no luck though getting an event to fire when the user selects a new value in a row's ddl. So Here is an idea for tracking usercontrol control event in the parent page, find control of usercontrol in parent page (using FindControl pass control id), assign method to particular event of that control do the work inside that method. C# - Why DropDownList. net using c#, vb. The DropDownList will not retain it's values when a Postback is done (caused by a submit button being pressed), and I cannot use the. 我的页面是用几个用户控件组合在一起的,后来我把有Dropdownlist 的那部分独立出来测试发现. The functionality of DropDownList is like a Single Row List Box. NET MVC: server—The data is serialized to the client. Dropdownlist. net,devexpress. SelectedIndexChanged. NET MVC 3 DropDownList selectedindexchanged. thanks ahead! Probably you do not have an event delegate set up. You can create a custom column class that replaces the filter text box with a drop-down list. Getting Started The Basics. Problem: Suppose wehave a collection and one field is type string contains some special character (like [email protected]#$%) and we don't want these special character. of UI for ASP. The MVC Dropdown Edit includes an edit box to display editor values (defined via the Text property) and a button to activate a dropdown whose contents can be templated. I use SelectedIndexChanged event to populate the second DropDownList. Get form data: asp:checkbox, asp:DropDownList, asp:TextBox (VB. Rate this: me how to hide some textbox on dropdown selectedindexchange event in mvc5. Now, After Design a page go to the DropDownList control SelectedIndexChanged Event by Clicking the DropDownList. If you are looking for information on managing multiple selections or supporting enums as a data source for your drop down, you should check out my newer post: ASP. DropDownList> in my aspx page But the SelectedIndexChanged event is not starting,. If i changed the value of dropdownlist then its immediately execute selectedIndexChanged event and updated the sql server database table. About RadDropDownList for ASP. NET Code Snippets Javascript SQL Server Gridview asp. I have a problem with DropDownList's SelectedIndexChanged event. net In this post i will show how to disable a drop down in asp. Example of cascading DropDownList | ASP. Binding DropDownListFor from enum, database and some hard coded values in our previous article MVC dropdown binding best ways. New here? Start with our free trials. Value Case 0: Label1. This guide presents a couple of common ways to populate dropdown lists in ASP. NET web forms will recollect that certain server controls such as DropDownList have a property called AutoPostBack. , when you insert an item before the currently selected one), these modifications do not trigger the SelectedIndexChanged event. Demo for events in ASP. Text Case 1: Label1. There are numerous situations in which you may need to get reference to controls in grid row/edit form and modify their state depending on the option the user chooses for another control in the same row/edit form. AutoPostBack property get or set a value indicating whether a post back to the server automatically occurs when the user changes the dropdownlist item selection. I've been trying to get this to work for hours to no avail (at least they're paying me :cheesy: ). In this Blog, we will learn how to get the current Row of GridView inside the SelectedIndexChanged Event of a DropDownList present on the GridView itself and then find the other DropDownList and bind that. NET MVC Extensions > Data Editors Extensions > ComboBox > Overview - ComboBox. I put a breakpoint in the method and the program does not stop. where to write coding of dropdownlist selected index change in mvc razor application. Web Forms are web pages built on the ASP. NET Not firing IndexChanged Event Hi everybody, (USING ASP. what do you mean with: 'How can I make dropdownlist no postback' ? In your example code I do not see the OnSelectedIndexChanged event. SelectedValue);rnrn没动静????是不是还要修改什么地方的属性或是。。。? 论坛. Net; DropDownList SelectedIndexChanged event not working when placed. Your Model. Do I have to add any javascript code to get the SelectedIndex from the dropdownList ? I´m not very used to this, so I hope somebody can help me. Parameter property. IsPostBack Then". If i changed the value of dropdownlist then its immediately execute selectedIndexChanged event and updated the sql server database table. Keyword Research: People who searched dropdownlist default value also searched. The DropDownList control is bind to the data source on the grdvCategoryList_RowDataBound event of the grid view control. If you need to handle changes made by API, wire the cascade event. NET AJAX in ASP. Alternatively, handle the corresponding client-side ASPxClientComboBox. The OnSelectedIndexChanged method also allows derived classes to handle the event without attaching a delegate. NET Core DropDownList component R2 2018 Release is here - now with modern UI for chatbots and more!. OnSelectedIndexChanged="DropDownList_WC_SelectedIndexChanged" > what I wanted when the user select a value to redirect the page to somewhere else. I have loaded a DropDownList in the first row of the child gridview and have loaded checklists in all other rows of the child gridview (I hid the checklists in the first row and the dropdownlist in all other rows). when the value of district DropDownList is changed, it fires its SelectedIndexChanged event but it does not fill the licencee DropDownList. C# - Get The Previous Item On DropDownList Before OnSelectedIndexChanged Fires The Event Jan 26, 2011. Net MVC Razor. There are many scenarios while creating a data entry form in the web application, where we need to present the data in DropDownList or ListBox from which user can select one or multiple items. Net using C# and VB. NET) This topic explains how to implement a Property Editor for ASP. As a resolution reopen the modal pop in dropdownlist selectindexchanged event like below protected void ddlEditTypeOfLand_SelectedIndexChanged(object sender, EventArgs e) {//Your code here //Open the popup.