I am filling a listview control with a big number of items but i came across an problem, the repeated values. In those items i use .Text and .Tag so i can relate some hidden values per item. I have been trying to use the items.find() with no luck since it looks like to search for keys, which i don't really have. Every item has different .Tag values but it can happens that they have the same .Text Is there any way to remove or just not add items based on a .Text search in the ListView?
see if an object is already in a generic List(Of T) than the way I am currently doing it? The way I do it at the moment is like so:I have a method that I call each time I want to check to see if an object exists in the list (if it already exists I do not want to add it again) and the list to check is passed in to this method along with the item that should be added to it:
[Code]...
So as you can see this function just loops through the list that was passed in and if the DisplayName property of one of the items in the list is the same as the ProgramName argument that was passed in to the method as well then it returns True to indicate that this program is already in the list.I thought about using a Predicate with the List.Find method but cant see how I would get it to work because that predicate method will not have any way of referencing the list (its a method local list, not class level)
I have 2 listboxes on my form.Listbox 1 - populated with "available" field namesListbox 2 - populated with "selected" field names.There cannot be the same field name in both listboxes - it's either one of the other.The logic I was going to apply was to populate Listbox 1 with every field name ... and then as I populated Listbox with the field names which the user has already selected, remove the corresponding item from Listbox 1.
I am trying to add tooltip to each item in a listview but they dont seem to come out. I tried setting the .ToolTipText = "text" on each item but when i put mouse over each item, nothing appear. What am i doing wrong?
Using the following code to add results from sql to a listview. Is there anyway that I can make a comparison from the reader against all currently existing item strings?
vb.net LstResults.Items.Clear() If con.State <> ConnectionState.Open Then Try con.Close()
I was trying to at random select a listview item, I tried: Dim random As New Random Dim test As String = random.Next(0, formMain.ListViewSearchResults.Items.Count) MessageBox.Show(test) but this brings me back a "0".
I have a listview, and when you right click, it shows some things. I need to make it see if an item on the listview is selected. Is there a way to do this?
Like, this doesn't work, but in code it would be like
If listview1.HasItemSelected = true then'code here end if
I want to retrieve the selected item in my listview as a string. I have 2 columns, Name and Version. When i click a button it should come up the value of the column Name of the item that is selected.
I remember doing this in a checkboxlist element, but with listview element its giving a hard time.
Private Sub CheckedListBox1_ItemCheck(ByVal sender As Object, _ ByVal e As ItemCheckEventArgs) Handles ListView1.ItemCheck If e.NewValue = CheckState.Checked Then For index = 0 To Me.ListView1.Items.Count - 1
ok I made my self a listview with a checkbox on it. I was wondering if it was even possible to add something to my form so when I build my project and I rightclick on my list view item a menu will open saying:
delete item Clear Item
A menu (not a form) just like when you do a right click on your mouse.
I need to add multiple images to a list view item dynamically. For example, if an alarm exceeds limit one image has to be displayed and is fine with me.But when the user clicks alarm inhibit checkbox,then two images has to be displayed,one for alarm existance and second for manual operation which represents the user action.Both the images have to be displayed under one column only..
I have a listview with a few items like below. What I need is when I select an item in the listview then click a button it will go to the url that in the second column in a webbrowser. So when I select an item then click a button it will do webbrowser1.navigate(listview1.selecteditem) or something like that but I cannot figure out how to get just the url.
I am trying to programmatically select all items, including subitems, in a listview and can't seem to get the result I am looking for. I have FullRowSelect = True set and when I click on the items, all is fine. However, if I use the following code, only the ListViewItem is selected and not the item's subitems. Is there a way to achieve this?
I am doing this within a thread:For Each item As ListViewItem In lvUsers.Items and I am getting: Cross-thread operation not valid: Control 'lvUsers' accessed from a thread other than the thread it was created on.I have been able to adjust a control in a way using something like:
Public Delegate Sub ListAddNameInvoker(ByVal text As String) Public Sub ListAddName(ByVal text As String) If lvUsers.InvokeRequired Then
[code]....
But how do I get data from a control and pass it to another thread?
how to, by a listview selected item make an picturebox appears?for exemple. got a listview in a form, and a hide picture box, and when i select an listview item, the picture box appears, turn the visible to true.
The following code will save an item to file over and over again, but how do I save an item only once? Dim w As New IO.StreamWriter("E:est.txt", True) w.WriteLine(ListBox1.SelectedItem, True) w.Close()
If, for example, number1 is already saved in the txt file then how do I not save it again, using something like the following? dim exist As IO.FileAccess ("e:s.txt") if exist.that.item.is.exist= true then w.WriteLine(ListBox1.SelectedItem, True) [Code] ..... I am using VS 2010.
And I select one and it works! But when I try to select a different one it comes up with an error on..If ListView2.SelectedItems.Item(0).Text = "None" Then The error..InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index
I have a list view control and for each item I set to display an icon it will change the icons for the other items that already have icons, to the most recently added icon.
Here is my code.
vb.net Dim ext As String = Strings.Right(e.Item.Text, 4) Dim fileandparam As String = IconsInfo(ext).ToString
Ok, so I have a listview on one form, and when a button is pressed it opens up a new form with the contents of the selected listview item and it's subitems in a series of textboxes. The user can then change the data in the textboxes and either press save to make the changes or cancel to close the window. What command would I use to change the selected listview item and subitems to whatever is in the boxes?
this is the code that populates the boxes:
Private Sub Form_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim appeditcontents As String = main.passlist.SelectedItems(0).ToString
removing Listbox item from checked Listview item.The code I tried just errors out.
Private Sub ListView1_ItemCheck(sender As Object, e As System.Windows.Forms.ItemCheckEventArgs) Handles ListView1.ItemCheck If (e.CurrentValue = CheckState.Unchecked) Then ListBox1.Items.Add(Me.ListView1.Items(e.Index).Text) ElseIf (e.CurrentValue = CheckState.Checked) Then
I have a media browser program I am building. I am trying to use drag/drop so a user can drag media tracks from one listview to another listview and then use the second list view as a playlist in windows media player com object. Reading at MSDN I have found out that there is no built in support for item re-ordering with the listview control. I have listview1 working correctly but when I try to reorder items in listview2, the dragged item ends up at the end of the list. So basically I need to get the item insertion index corrected. I have tried more than 10 times to get this code right.
Here is my code which includes a form with two listview's.
Public Class Form1
Private Sub ListView_ItemDrag(ByVal sender As Object, ByVal e As _ System.Windows.Forms.ItemDragEventArgs) Handles ListView1.ItemDrag, _ ListView2.ItemDrag
Currently, the following code shows a blank line if Address2 (which comes from the database) is Null. How can I condition on the value of <%#Container.DataItem("Address2")%> so I can get rid of the blank line if Address2 does not exist (or is Null) in the database? If code in the code-behind is needed
I've been scouring the net, and can't seem to find a solution that works.I have a page done in ASP.NET (in VB) that has a drop down list populated by an SQL query.My dropdown list gets renders as follows (information slightly altered):
