How To Remove An Item From A List
Nov 17, 2010I know the employee's ID and would like to remove it from my List<Employee> listOfEmployees.
The listOfEmployees.Remove seems to require index of the item to be removed.
I know the employee's ID and would like to remove it from my List<Employee> listOfEmployees.
The listOfEmployees.Remove seems to require index of the item to be removed.
I have a class name Holder. I create a List of Holder, then add Holder to it.
holder = new Holder();
holder.Id = id;
holder.Distance = distance;
holderList.Add(holder);
its cool at this point. But now i want to delete a holder from holderList and I do following in another method.
holder = new Holder();
holder.Id=id;
if(holderList.Count > 0)
holderList.Remove(holder); //Error here it does not remove that spacific item.
I have an asp.net menu in which i have to let some nodes visible or invisible base on some logic.I know i can find value by item but i wnated to FindItemByValue of my asp.net menu.Could it be possible?
View 3 RepliesI have a list with 2 sorts of items. Items that have actual values (1,2,3,4 etc) and items that are like group headings so all their values are set to 0. If someone decides to select a group heading - which has a value of 0, is it possible to redirect them to my 'Select an item' item which has a value of ""?
If worse comes to worse, I can just reconstruct the entire list, although if possible I'd like to avoid it.
i use a dropdownlist in a page, with its items taken from a mysql database
i also use autopostback property...my problem here is that, every time i selecct an item, the first item in the list gets seelected
I have a drop down list control populated with items and some code to take the currently selected item value. The problem is I only get the value of the first item in the list regardless of what item is actually selected. Here is my code to populate the drop down:
protected void displayCreateCategories()
{
StoreDataContext db = new StoreDataContext();
var a = from c in db.Categories
orderby c.Name
select new{catName= c.Name,
catId=c.CategoryID};
ddlCategory.DataSource = a;
ddlCategory.DataTextField = "catName";
ddlCategory.DataValueField = "catId";
ddlCategory.DataBind();
}
To get the value of the currently selected item which in my case is always of type integer I do label1.text=Convert.toInt32(ddlCategory.SelectedValue); I get the selected value, but it is always for the 1st item in the list. I'm pulling my hair out over this.
Clicking the label of a drop down list, re-sets the selected value to the first item in the list. This has a history of causing data entry problems when users accidently click on the label.
In the below example ddlContactType has a selected value as 'PRIMARY' and whenever i click on the lblContactType Text, the dropdown box Selected value is changing to "Select One" Text.
How to prevent this one. It should be on PRIMARY Only.
<p>
<tr> <td ><asp:Label ID="lblContactType" Font-Bold="true" Text="Contract Type: *" ForeColor= "red" runat="server" AssociatedControlID="ddlContactType"></asp:Label> </td> <td > <asp:DropDownList runat="server" ID="ddlContactType" DataSourceID="SqlDataSource2" AppendDataBoundItems="true"
DataTextField="TYPE" DataValueField="ID" SelectedValue='<%# Bind("CONTACT_TYPE_ID") %>'>
<asp:ListItem Text="Select One" Value="0" Selected="True"></asp:ListItem>.......
I have a dropdownlist, and in some cases need to remove an item (in the code-behind). I need to remove the item based on the value of the item.
View 3 RepliesI have a requirement in my application that, while saving the application, need to get all the value from drop down list and pass it to the view model. But application should not allow the user to select more than one item from drop down list manually, ie, only one value at a time. My view model is like ...
public class ListManagement
{
public IEnumerable<selectListItem> InactiveProduct { get; set; }
public string[] InactiveProductSelected { get; set; }
public IEnumerable<selectListItem> ActiveProduct { get; set; }
}
[code]...
I have a master page which has an unordered list in this way:
[code]....
These links are directed to my content pages. I am able to highligt the selected list item on hover and on active.
But I do not understand how I can highlight the selected list item as long as the user is on that specific page/link (current list item). I know that we can specify a seperate body tag and id for each of the content pages and then use CSS to highlight the current list item, but all this code rests already inside a body tag in the master page.
I am having an unordered list like:
<ul style="list-style: square url(Images/rssIconSmall.png)">
<li><h3>All Items</h3></li>
<li>Item1</li>
<li>Item2</li>
<li>Item3</li>
I've put together the following code which generates a dropdownmenu list (values from a database) in a repeater control, then adds a final item. I can make it selected, but I'd like it to appear at the top, rather than the bottom as it does now.
[Code]....
I have 2 cascading dropdown lists (ListA and ListB).
The selected value from List A is used to determine ListB.
I am wondering if there is a way to dynamically remove items from ListB after ListA value is selected. There are entries in ListB that should not be available unless the user has certain security permissions.
I have I gridview in which the data source is a List<T>. When I try to remove an item from the gridview in my buttonRemove_Click() function another function which handles the RowDeleting event is invoked where I remove the item from the List<T> as well. The problem is that if I select to remove multiple items from the gridview the index of the gridview and that of my List<T> un-syncs. For example I have 10 items in my gridview and in my List and I try to remove the last two items. Here is how I do it in my buttonRemove_Click function
foreach (GridViewRow row in gridViewItems.Rows)
{
CheckBox cb = (CheckBox)row.FindControl("checkBox");
if (cb != null && cb.Checked)
{
gridViewItems.DeleteRow(row.DataItemIndex);
}
}
Then in the RowDeleting function, I'll first receive the event for the index 8, I removed it. Now when it comes to deleting the last item (index 9), then it'll throw exception because the index is out of range. How do I solve this problem? I think the problem will be solved if I try removing the rows in reverse order i.e. starting from the highest index. Can anyone tell how can this be done?
I am using list view to display the the data but i am getting an error like An item placeholder must be specified on ListView 'ListView1'. Specify an item placeholder by setting a control's ID property to "itemPlaceholder". The item placeholder control must also specify runat="server.Even i have specified the itemplaceholder id but no use still same error.
[Code]....
I have a web page with paypal. In the page user add items to list then buy it. when user add item to list i block that item in stock until user buy or delete that item.Now my problem is when user add item in the list and then close the broswer from IE close button , the item get blocked. I want to rollback the added items when user close the browser from IE button.
View 2 RepliesI have created my menu items using web.sitemap, asp:sitemapdatasource control and asp:menu control. I'd like to programmatically remove some of the parent menu's based on certain conditions (I'm guessing it will be under the MenuItemDataBound event).
I know how to remove child menu items, not sure how parent menu items can be removed.
i have a place order form and i have a drop down list that contains list of items whenever i add item (for example item1) to place order and click add another item button, i need to remove (item1 ) from drop down list to avoid dupplicate insert in sql table or mayb need to fill the drop down but without (item1) cause i already selected it i am using sql datasource to fill the drop down list of items.
View 13 RepliesI Use listView and flow configure and connect to database whit wizard.
in Item Template View, i cannot remove items, when reomve it, after 2 seconds, An item that was deleted is shown again!
I need to remove an item from the check box list ("cblServices") based on the query string value ("serveytype").
I pasted my code here.
[Code]....
When the query string ("serveytype") = 1, some of the items in the checkboxlist "cblServices" need to be removed before it's being Enabled = true.
Similarly, when "serveytype" = 2, some of the items need to be removed.,etc..
I have two drop down list on a page. The first one list projects and the second list users. The userlist is populated with an object datasourse that pulls a list of users for the selected Project.Whenever the Project list selection changes the second ddl Userlist always reverts to the first person in the list instead the person that was selected before a new Project was chosen.
View 1 RepliesI have a list view with couple rows, which has a delete button for each row.
Now once the delete is performed and it's a success, I want to remove that item from the ListView
[Code]....
I use asp.net 4, ef 4 in c#.I use System.Web.Security to manage users in my web application.
I have a collection of users in MembershipUserCollection and I need remove some users during a foreach on that collector.
I suppose it is impossible to remove an item from the collector when you are looping.
MembershipUserCollection users = Membership.GetAllUsers();
foreach (MembershipUser x in users)
{
if (!Roles.IsUserInRole(x.UserName, "CMS-AUTHOR"))
{
users.Remove(x.UserName);
}
}
Error: Collection was modified; enumeration operation may not execute.
Based on the image, how to select the value from dropdownlist, then tick the checkbox and update the value ?
View 1 RepliesIn Listbox after select one item in first and how to unselect or remove focus on that listbox.
View 1 Replies