Web Forms :: Dynamically Populated Listbox Always Return Selected Items As False?
Mar 10, 2011
I have the following code which simply gets data from a table and populates the questions_lb listbox with items. I have a button on the page, which when clicked, should write (on submit) the selected state of each of the items. The code below writes the text values of each of the items fine however it always writes the li.Selected as False even though i have selected items from the list. Note that you can select Multiple items from the list. Does anyone have a clue why its not writing 'True' for an item that is selected on submit?
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 am trying to persist data in a dynamically populated ListBox in a user control. Here are the details
I have a user control which contains a a listBox and button. On Page_Load of user control I am populating the ListBox control with some values. On Click of button, I am trying to fetch the values which I have selected in ListBox. Though this seems very simple and straight forward I am unable to fetch values.
I have placed brake point at Page_Load and on click function, I am seeing that the moment the breakpoint hits Page_Load function (before If (!Ispostback)) , listBox.SelectedIndex is becoming -1.
One more thing here is, I am placing this user control in an SharePoint application page to be specific checkin.aspx page . ( I know this should not be done, but that is the requirement for me)
I had used listbox control with multiple selection mode. I stored id with comma delimiter in database.
e.g.
1. List Item One. 2. List Item Two. 3. List Item Three. 4. List Item Four. 5. List Item Five. 6. List Item Six.
Suppose user select item 2, 4 & 6. So I will store it as a 2,4,6 in database. This will work fine.
Now in editing I have to shows selection-bar for item 2, item 4 & item 6. So I had typed below source.
string strData ="2,4,6" if(strData != null) { char[] separator = new char[] { ',' }; string[] strSplitArr = strData.Split(separator); int x = 0; for (x = 0; x < strSplitArr.Length; x++) { // lstWDef_PurchasesEdit.Items[x].Selected = true; lstWDef_PurchasesEdit.SelectedValue = strSplitArr[x].ToString(); } }
But with this statement I got only last item id as a selected item with selectionbar. In our example 2,4,6 only item whoseid is 5 got as a selected item.
if i use
for (x = 0; x < strSplitArr.Length; x++) { if (lstWDef_PurchasesEdit.Items[x].Value == strSplitArr[x]) { lstWDef_PurchasesEdit.Items[x].Selected = true; } }
if the selected items are serial like 2,3,4 then it is displaying correctly..
if items are 2,4,6 then it is not selecting the items of listbox properly.
Is anybody guide me how to make item 2, item 4, item 5 as a selected item ?
i have a listbox LbGeneratedExcelLinks when i click inside of it on an item it download the selected item
here s my code
Protected Sub LbGeneratedExcelLinks_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles LbGeneratedExcelLinks.SelectedIndexChanged Dim RedirectUrl As String = LbGeneratedExcelLinks.SelectedValue Response.Redirect(RedirectUrl) LbGeneratedExcelLinks.SelectedIndex = Nothing End Sub
problem is if i want to click on another button or other event it keeps showing the dialog open or save file the one i put inside selectedindexChanged
unselect after the selectedindexchanged i think it will solve my problem
I have a DropDownList shows the company names and a ListBox shows the products of the company I selected in the DropDownList and I can select many products from ListBox:
I must be doing something wrong, but this makes sense to me. I have a Listbox loaded with tons of items from a datasource. A user clicks one of these items it grabs the selectedindex (an integer) and stores it in a HiddenField (works fine).
Now when the page does a complete a refresh (after postback) I want the ListBox to go back to that selectedindex that is in the HiddenField. Problem is, it seems that after postback the HiddenField is empty? Then I thought about storing the value in an Integer variable in code, but that is simply coming up as a zero at all times.
Question 1: What is the best/simplest way to do this?
Question 2: How?
I am currently grabbing it on selectedindex change
I have a list box which is populated using a dictioanry. When I iterate throught the selected items using the following code, it always show only the first items as selected - even if the first item is not selected. Have you ever encountered this scenario? This problem occurs when I use dictionary for binding. On the other hand a generic list works fine.
i am making use of two listboxes. the data from one listbox is transfered to other listbox on button click, bt teh the data which is selected must be added to the table in the sql server. but it is not storing values it is throwing execption...
private void InsertRecords(StringCollection sc) { SqlConnection conn = new SqlConnection("Data Source=ABCD;Integrated Security=True"); StringBuilder sb = new StringBuilder(string.Empty);
my vb.net will not use listbox1.selecteditems it always comes up with a blue line underneath even though when i search online everyone is using this. my goal is to get the selected items and list them in a textbox
Protected Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim li As ListItem For Each li In ListBox1.Items If li.Selected Then TextBox1.Text &= li.Text & vbCrLf End If UpdatePanel2.Update() Next End Sub End Class
I am persisting the search selection criteria of a listbox onto another page which is called AreasLb. Multiple areas can be selected, I simply want to set the listbox items that the user selected as .Selected = true
I think the below code should work, but it doesn't, with no items in the Listbox being selected.
if (s == "Areas") { string[] area = nv[s].Substring(0, (nv[s].Length - 1)).Split(';'); int i = 0; foreach (ListItem item in AreasLb.Items) { foreach (var s1 in area) { if (s1 == item.Value) { AreasLb.Items[i].Selected = true; } continue; } i = i + 1; } continue; }
This has got to be more simple than I'm making it. I want to generate a listbox with years for the values. It needs to be dynamic. It needs to list from 17 years ago to 25 years ago. This is what I have so far, I get the correct number of items in the listbox, but I don't get the correct value. They are all "1985".
<% Dim y As Integer Dim NextTime As Date = Now Dim bday_yr As New ListItem() y = 0 For y = 17 To 25 NextTime = DateAdd(DateInterval.Year, -y, System.DateTime.Now) bday_yr.Value = NextTime.Year bday_yr.Text = NextTime.Year BirthYear.Items.Add(bday_yr) Next %> <asp:DropDownList ID="BirthYear" runat="server"> </asp:DropDownList>
i have asked myself if there is an easy way to check if a ListBox has a maximum of 5 selected items. There must be at least one and at most 5 items selected.Do i need a CustomValidator with server-side validation?
I added some food items in CHeckBoxList. I want to add selected food item(s) in a ListBox. The Text Property is name of the food and it's value is there Price (Food Price) As soon as I add any food item in a ListBox the total should be displayed.
Whichever code I wrote using it, if i select 1 item then it adds in a ListBox. But If I select another food item then Previous food item also added because it is selected. I will select some food items then it will be adding in the ListBox, I will check the total, if the total is greater than my budget then i can remove some food items.
I am trying to return in a string the selected items from a dynamically bound checkbox list control with no luck. In my code behind file I am conencting to a class called users and building a datatable. I then bind the data table to the cblist control
private void populateUserList() //called on page load { SubmitOptions mySubmission = new SubmitOptions(juris, rptType, tmplName); if (mySubmission.Users.Count == 0) {
[Code].....
The list populates fine and all I want to do is return in a string all selected users from the checkbox list control.
As I said if I hard code the item values into the control the above code works and I can see the selected items in the string however removing the itemslist tags and switching over to a binding nothign happens. The above method counts the entire number of returns but nothing selected is ever returned.
I'm trying to auto-populate a listbox of zip codes from a database table state_zipcode_plans based on the state a user selects from the previous listbox. I'm getting the error: Must declare the scalar variable @state_code.
I'm creating a search form that will include textbox and multi-select listboxes. I figured out how to load the listboxes but not how to grab those values on the postback in the controller method. Here's my simplified code:
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using System.ComponentModel.DataAnnotations; [code]...
