What is the use of SelectedIndexChanged in asp net?
The SelectedIndexChanged event is raised when the selection from the list control changes between posts to the server. A list control must persist some values between posts to the server for this event to work correctly.
What is SelectedIndexChanged?
The SelectedIndexChanged event occurs when the SelectedIndex has just changed. The SelectedIndexChanged event does not fire unless the AutoPostBack property is True . The SelectedIndexChanged event handler receives two arguments: The RadDropDownList that is loading items.
How can I call DropDownList SelectedIndexChanged event without AutoPostBack?
[Solved] Fire DropDownList SelectedIndexChanged event without reloading page in ASP.Net. Put your DropDownList and GridView inside the Update Panel. Set the OnSelectedIndexChange Event and Set Auto Postback to true for DropDownList. You will be having the Partial Postback not full Postback.
What is SelectedIndexChanged C#?
Occurs when the SelectedIndex property or the SelectedIndices collection has changed. public: event EventHandler ^ SelectedIndexChanged; C# Copy.
How do you call a function SelectedIndexChanged in page load?
protected void Page_Load(object sender, EventArgs e) { //call the DropDownList1 selectedindexchanged event manually dropDownList1_SelectedIndexChanged(sender, e); //page load event handling code } protected void dropDownList1_SelectedIndexChanged(object sender, EventArgs e) { //DropDownList1 SelectedIndexChanged event …
What is AutoPostBack in asp net?
The AutoPostBack property is used to set or return whether or not an automatic post back occurs when the user selects an item in a list control. If this property is set to TRUE the automatic post back is enabled, otherwise FALSE.
What is ListBox control event?
The ListBox represents a Windows control to display a list of items to a user. A user can select an item from the list. It allows the programmer to add items at design time by using the properties window or at the runtime.
How do I populate a second dropdown without postback?
hi, you can make use of Updatepanel in your page, this will not postback your page. Check this i have used it. The ControlID given in the is the Control on whose indexchanging changes the values in the second dropdown.
What is AppendDataBoundItems in Dropdownlist in asp net?
The AppendDataBoundItems property allows you to add items to the ListControl object before data binding occurs. After data binding, the items collection contains both the items from the data source and the previously added items. The value of this property is stored in view state.
What is combo box in VB?
The ComboBox control is used to display a drop-down list of various items. It is a combination of a text box in which the user enters an item and a drop-down list from which the user selects an item. Let’s create a combo box by dragging a ComboBox control from the Toolbox and dropping it on the form.
What is ViewState used for?
View state is used automatically by the ASP.NET page framework to persist information that must be preserved between postbacks. This information includes any non-default values of controls. You can also use view state to store application data that is specific to a page.
What is the meaning of IsPostBack in ASP.NET c#?
IsPostBack is a property of the Asp.Net page that tells whether or not the page is on its initial load or if a user has perform a button on your web page that has caused the page to post back to itself. IsPostBack property will be set to true when the page is executing after a postback, and false otherwise.
What is selectedindexchanged event in ASP NET dropdownlist?
The SelectedIndexChanged event of ASP.Net DropDownList. When an item is changed in ASP.Net DropDownList, the following OnSelectedIndexChanged event handler is executed. Inside the event handler, the selected Text and Value of the DropDownList Selected Item is fetched and displayed using JavaScript Alert message box.
When does the selectedindexchanged event occur?
Occurs when the SelectedIndex property or the SelectedIndices collection has changed. The following code example demonstrates how to use the SelectedIndexChanged event to search for and select an item in a different ListBox control. The example uses the SelectedIndexChanged event to determine when the selected item in the ListBox is changed.
What is the data class of the selectedindexchanged event in Salesforce?
Occurs on the client side after a different item in the list has been selected (focus has been moved from one item to another). The SelectedIndexChanged event’s data class is ASPxClientProcessingModeEventArgs .
How to detect if the selected index in a listbox has changed?
If index = -1 Then MessageBox.Show (“Item is not available in ListBox2”) Else listBox2.SetSelected (index, True) End If End Sub You can create an event handler for this event to determine when the selected index in the ListBox has been changed.
