VS 2008 / Unable To Get Selected-index Of DropDownList?
Jan 26, 2012
I am populating a DropDownList from a text file (class requirement).
The file is read in the Page_Load method and the DropDownList is populated then.
When I press the Submit button, throughout the process of the code it is supposed to get the SelectedIndex and use it to grab a value out of a List(Of ).
The thing is, nothing is ever passed through. I even setup an alert box and it passes right over the alert box and never even triggers it, but gives me an Index out of range error when it moves to the line right after the Alert.
I am using SelectedIndexChanged in the DropDowList and it works fine and populates a GridView based upon a site selection.
Is there there a way I can reset the SelectedIndexChanged so if user wants to refresh the GridView they would open the drop down list and click on the same selection again?
I am binding months to a list 0-13 items default selection is 0 months duration, and years 0-8 items and 0 years is the default selection.As I know there are always going to be 12 months in a year, I could use selectedvalue or selectedindex without any perceived problem. Is there a reason why I should not use either/or of the two properties to select a list item?
i have 2 drop down list..first for city and second for state i want to fill the state list when the city is selected...m using the code
protected void Ddl_SelectedIndexChanged(object sender, EventArgs e) { String sqlQuery="select SM.StateId,StateName From StateMast SM,CityMast CM where CM.StateId=SM.StateId AND CM.CItyId='"+ Convert.ToInt16(DdlCity.SelectedValue.ToString())+"'"; DdlState.DataSource = cls.Select(sqlQuery); DdlState.DataTextField = "StateName"; DdlState.DataValueField = "StateId"; }
but nothing is happing on selecting city..i have set the autopostback of city=true..select is a function which is returning data tablepublic DataTable Select(String sqlQuery) { con.Open(); SqlDataAdapter adapter = new SqlDataAdapter(sqlQuery,con); DataTable table = new DataTable(); adapter.Fill(table); con.Close(); return table; }
I have a problem in setting the selected index /value in a drop down list. The list is bound by a Linq query and I want to add an item at the top of the list and set it as the selected item.
THis is the code i am using
ListItem li = new ListItem("Select", "", true); list.DataSource = (from ap in edc.Approvers where ! ap.approverEmail.Equals("") orderby ap.approverEmail select new {ap.approverEmail}).Distinct(); list.DataTextField = "approverEmail"; list.DataValueField = "approverEmail"; list.DataBind(); list.Items.Add(li); list.Items.FindByText("Select").Selected = true;
The listItem li is the item i want to be first in the list and also selected. Adding this before the databind just loses the item.
I have a user control that has some drop down lists. These DDLs are used by the user to filter their product search on my search page. A button is used to post the form and get the results of the product search. Those results are displayed on the results page, which also has the search filter user control on it. I'd like the results page to have the values of the DDLs be preserved from the search page. Example: user selected color of red and size of large on the search page. When the results page is displayed, I'd like the selected color to be red for the color DDL and the size to be large for the size DDL. How can I do this?
I have a dropdownlist1 control in footer template, but when i go to edit command for editing an existing row. at that time. the footer dropdownlist box showing exact index which is selected in edit template dropdownlist box.
dropdownlist1 is in footer template and dropdownlist2 is in edit item template.
same datagrtid i am using for adding new rows via footer template and editing existing rows via edititem template.
how to make dropdownlist1 which is in footer template to selectedindex "0", when i go to editcommand. tried using itemdatabound but not working.
there is 3 drop down list control in in first dropdown load Districts when page load when we select or index changed in drop down1 items changed or loaded in drop down list2 according to the disrict.According to the item selected in drop downlist2 items changed or loaded in drop downlist3.
I have a simple query based on the index changed event of a dropdownlist in ASP.NET. The scenario is i have a dropdown list bearing a collection of items (say ONE, TWO, THREE, FOUR, FIVE) with the default value selected as 'ONE'. Now, when the client changes the index (say the client selects 'TWO'), a confirmation box is prompted asking 'Are you sure want to change the index?' with the buttons YES & NO. Now, the problem is, if YES button is clicked then its working fine as the index is changed. But when NO button is clicked in the confirmation box, I do not want the index to be changed to 'TWO' and it should be holding the previously selected value which was 'ONE'. How can I do this? For which event should I write the code, as I cant think of writing the code for the IndexChanged event because here the index change has already occured and since there is no 'IndexChanging' event in ASP.NET, where shall i write the code
In ASP.NET, I can get the selected index of dropdownlist using:
var dropdown1 = document.getElementById('dropdown1');But I want the selected index of that dropdownlist, which is present INSIDE a GridView.How to get that using JavaScript?
I have a gridview that receives data based on selection from a primary dropdownlist object. Works.
Within the gridview, there is a dropdownlist whose selected index is based on the query from the primary dropdownlist. Works.
Problem.
How do I force the used to change whatever value that the dropdownlist contains after they make their initial selection from the primary dropdownlist; except the default value of "make a selection".
Gridview, contains a checkbox which drives whether a selected row is inserted into the data base. The databind in done using an ObjectDataSource on the presentation page, not in the code behind.
How do i change the name column text the current row when the selected index of drop down is changed? ex:first row is mudassar khan and belgium, when i change belgium i want mudassar to be replaced to a name which i fetch from database....
I want to filter grid view, drop down list should select the column and text box will filter the column. like ID NAME Phone Designation fields in gridview.i will select Designation in dropdown and type programmer in text box .so it should filter programmers from the gridview...
Now I am going through the rows of the gridview manually and need to get the values. You can see I have tried different ways. How can I do this from clicking a button to get the values instead of any other event? I only get True or False returned instead of the text in the dropdownlist controls.
Code: For X = 0 To gvFields.Rows.Count - 1 Dim chkBox As CheckBox = CType(gvFields.Rows(X).Cells(0).Controls(1), CheckBox) If chkBox.Checked = True Then Dim ColumnName2 As String = Trim(gvFields.Rows(X).Cells(1).Text)
I am trying to hide 2 buttons depending on the value in the dropdownlist. It works when the page is initially loaded but chokes when returning to the page sometimes. I have some pretty simple code in the Page_Load event within an If Not Page.IsPostBack statement
i need to Filter and display Google Map Markers from database based on DropDownList selection. for that I need to pass the selected value of DropDownList to the query.What should i do in the following code to do the above task?
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI;
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; } }
