AJAX :: Fill A Listbox With Value Selected From A Dropdownlist
Sep 8, 2010
Maybe the question has already be posted, but I didn't find it. I have in my web page two controls: a dropdownlist and a listbox My goal is to fill the listbox with values from my database depending on what I have selected in my dropdownlist. I wouldlike to use the CascadingDropDown component for that. Is that possible? (I tried on my own and I get this error message
Exception Details: System.InvalidCastException: Unable to cast object of type 'System.Web.UI.WebControls.ListBox' to type 'System.Web.UI.WebControls.DropDownList'. I think it's when i tried to fill the listbox with this function:
I am having a 2 dropdown list, in the first dropdown I have 3company names,for each company I am having separate tables,every table have a empcode, if the user select the company name in the 1st dropdownlist, as per company selected the 2nd dropdownlist it will fill the list of employee codes as per the selection..
I have a modalpopup extender that is brought up if the user presses a button. This is fine and the user can enter the data. There are a number of textboxes and dropdownlists. However, I have a gridview which I want to bring up modalpopupextender so the user can edit an entery. How can I set the data to the controls? A dynamicpopulate extender will repopulate the modalpopupextender with all the data. It doesn't make sense for me. Is there anyway I can populate the data with c#? Also can I assign two buttons to call the modalpopupextender?
Im using a web form that contains a button(having id=btnSubmit) dropdownlist(having id='ddlDynamic') and a panel which has a dynamicpopulateextender that makes use of the fllg webservice method
I have to parse the data to dropdownlist and then choosed the data from dropdownlist, this data will be appear in listbox. But my problem is when I parse the data to dropdownlist, I used updatepanel. It is no problem. It is okay. And then when I choose the data from dropdownlist, It can't be appear in listbox. Why? I have no idea. My code is :
how I can read the selected field from the listbox?I have MSAccess table attached to the app.I can get to the properties, but I don't know which property gets me the data of the specific field.In VB it would be "listbox1.Column(x)", where 'x' represents the column number in the listbox1.I am using Microsoft Visual Web Developer 2010 Express
I have a number of dropdownlists which use cascading dropdownlist / webservices. All fine. Now user wants last dropdown to be multi-select. So I want to replace the last dropdownlist with a listbox. But there is no cascadinglistbox. I'm looking for a straight-forward solution if possible. Either how to fill the listbox with the existing webservice which fills the last dropdownlist, or - is it possible to use the contrents of the last dropdown as a datasource for the listbox? I thought maybe hide the last dropdown and loop through its contents to fill the listbox.
I have one dropdownlist and textbox which is databinded and will display retrieved data on a listbox, i wanted to clear the textbox and dropdownlist using a button after displaying data on the listbox.
How to get the selected item from the listbox in the selected index changed event. I tried: Label1.Text = ListBox1.SelectedItem.Text; It is giving me object set to null reference.
foreach (ListItem item in ListBox1.Items) { if (item.Selected) { //lblResults.Text += item.Text + " "; Label1.Text = item.Text; } }
I'm having trouble getting selected items in a listbox to be seen as selected. On my aspx page there's a listbox and a button:
[Code]....
But if I change my condition to Not selected, the string does build, with every item in the list. So the Sub is reached, the items and their text and values are seen, but user selection of items doesn't work. What am I missing?
I have an accordion which contains a dropdownlist. In my code behind I'm trying to get the value selected by the user. I've tried so many different ways but couldn't get it to work. The latest one I tried was: (accordion1.FindControl("ddlGender")).ToString or
if Request.Params.Item(ddlGender.UniqueID).Length <> 0 then
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'd like to set the selected value of cascading dropdownlist by reading from a Textbox.Text value when the dropdownlist has been populated, is this possible?
I have a form in which I have a gridview with a LinkButton culumn in which when the user clciks a modal popup extender shows up. In the modalpopup I have a dropdownlist which is filled from DB in code behind. but when the user clicks on Add button in modalpopup panel, the selected value of the dropdownliast is always its default value.
[Code]....
here is my code behind:
[Code]....
I traced my code behind, the fillData() which fills up dropDownList is called only once in page load's first time.
PS. I understood the problem exists only when the modal is poped up by linkbutton click of gridview. when It is poped up by a button outside the grid it workes fine.
When I use the code below an error accur when click add button to insert into sql because the selected value in DropDownList is back to --select-- Idon't know why it should be the the value I selectedbut when not use this code and bind the DropDownList using wizard it works but I need to use the code to make the first selection is --select--.
private void PopulateDropDownList() { string constr = ConfigurationManager.ConnectionStrings[1].ConnectionString; using (SqlConnection con = new SqlConnection(constr)) { using (SqlCommand cmd = new SqlCommand("SELECT Country_ID,Country_Name FROM Country", con)) { using (SqlDataAdapter da = new SqlDataAdapter(cmd)) {
I am unable to get the selected value of the DropDownList. When the user selects a value and clicks OK, the value that was loaded as the default selected value with an index of 0 is available in code behind, not the newly selected value. See the attached code for the dropdownlist in the Modal Popup form.
I use RequiredFieldValidator for Dropdownlist and I have button.I want if users don't select Item from DropDownList when they click on button it will shows validation error and if they select Item from DDL and click on button it will shows popup..now here if users don't select Item from DDL and click on button it show validation error and popup both...I want if they don't select Item from DDL it just show validation error and if they select Item from DDL it just show popup.
my requirement is to get the result in gridview based on the treeview node selection using javascript i.e. client scripting. Currently the same can achieve using server side scripting, but i want with out postback and without using selectednodeindexchanged event.
