ListView - Remove Last Entry With Button
Apr 11, 2009I have a listview I populate using a button and a textbox. I want to use another button (btnClear) to select and remove the last entry from the listview if there's an error.
[Code]...
I have a listview I populate using a button and a textbox. I want to use another button (btnClear) to select and remove the last entry from the listview if there's an error.
[Code]...
Just lately I've been 'playing' with entering data into a ListView and I have come up with the following code which seems to be OK. Can anyone see if there is any fault with it?
Code:
I need help on improving the performance of a program I wrote some time back. This is the main performance issue of the program below. Basically I need to look through some data that is displayed to a user in a list view and determine if the data is a duplicate of any other data in the list. If it is I need to delete the duplicate before my program continues.The below code does the job just fine, however the list view of data has approximately 30,000 rows of data. Hence looping this list 30,000 to the power 30,000 times makes the program very slow. Note subItem(4) in the data is the "unique" identifier that I later discovered was not so unique....
This was a work around function implemented in the code back when I wrote it (not meant to be permanent). I know that listView is not Ideal to store this much data.how to store the data in a more efficient manner or improve the performance of the Search and Delete [code].....
I need to display all the data in that table but it only shows me the last entry.
db.OpenConnection()
strSQL = "SELECT * FROM BaselineTeam WHERE Process = '" & txtProcess.Text & "' " & _
"AND SubProcess = '" & txtSubProcess.Text & "'"[code]......
How can i remove an array item by selecting an item from listobx and press remove/delete button?for an example, if i want remove index 2 from listbox, so the array should remove index 2 item and move the item of index 3 to index 2 and so on.
View 7 RepliesI have 3 forms, one frmMain - main form, second is frmUserType- childform, and the last frmCreateUserType. In the main form I have a menu item to open my frmUserType, In this form I have a button to open another form which is my frmCreateUserType, In this form I have a button to add records then update the listview in frmUserType. The problem is the listview will not access with my add button control in frmCreateUserType. I tried not to used mdiparent declaration for my frmMain and frmUserType as children and it works, so meaning that the problem is showing my frmUserType as childform?I am using vb.net 2008
Code to open my second form (frmUserType)
[CODE]...........
Code for my add button to update the listview in frmUserType
[CODE]...........
In my VB.net solution I have a form in which I have to choose a beginstation and an endstation. I have to select both from comboboxes. Now what I want is that when I choose a beginstation, the chosen station will be gone in the combobox of the endstation so that I can't pick the same endstation as the beginstation.Is there a way to do this? I've tried a lot with SQL and LINQ queries but it didn't work out :(
View 1 RepliesI need to have 4 text boxes and three command buttons. One button should be used for exiting the program, one button should be used for clearing all of the text boxes, and the last button should be used for any calculations/conversions. You should also have a radio button group for the user to choose entry temperature type.
One text box should be used for the entry of an initial temperature. The radio button group will then allow the user to select the entry temperature. When the button is clicked for conversion, the other three text boxes will populate with answers to the conversion. and if I enter 37 degrees Fahrenheit, the Fahrenheit text box should read 37 after the conversion.)
Below is the code that will and does add to listview1 when triggered, but, will not remove it. I have spent a lot of time trying to figure this one out. There is not any error even when I step through.[code]...
View 2 RepliesI have a listview that has multiple entries and each entry has 2 subitems. I am wanting to know how to remove each item in the listview where the subitem(1) equals a certain string.
View 1 RepliesI am using vbexpress 2008. I have two queries. How a selected item of a listview can be removed? when there are more items than the height of listview an there is scrollbar how focus can be set on the last item of listview every time a new record is added in the listview?
View 9 Repliesi am pulling together a cash register that will allow both bar code product entry and manual key entry.imagine if you have a tin of beans in front of you, in a small corner shop they would probably type "47" and then hit "Produce". Fairly straight forward as I have the button Produce to act upon my code and update my salestrans.mdb but,if you scan the bar code I want the same form to handle both 'real' actions, (i assume that keyboard emulation barcode scanner includes "ENTER" after providing 13 digits)....
Q. in perhaps a long winded way i want to know how to kick off an event based on the "ENTER" key being activiated by the barcode scanner)?i do not want to have to hit any buttons if i am scanning bar codes.
I have a listview and on save or update of the database it saves the TicketID to the listview. It also shows all the prior tickets created in the listview as well. I would like to pass the very last entry ie in this case TicketID to a textbox so that it prints out a ticket with the ticketID for the user.
Don't really want to loop through all the other tickets in the listview since it could end up running into the tens of thousands of numbers.
What is the code for ignoring the case of an entry while checking to see if the entry is correct or not... (i.e. in a flashcard program... given definition, asks for the name) I don't want the case of a character to affect whether the answer is correct or not.
View 2 RepliesI'm trying to remove items from Application Settings using a ListView.[code]...
View 8 Repliesi don't have any idea how to remove or prevent duplicate item in a listview when ever you update it or insert value to your data base.
View 5 Repliesi've got this code to remove all selected items in a listview... but i like to know if there is any more simple code to do this ...
My code:
Dim i As Integer
With frmMain.FeedsList
For i = 0 To .Items.Count - 1
[code]....
Imports System.Diagnostics
Imports System.IO
Public Class Form1
Public Function callme()
[code].....
If you add a list view, then add a column, and an item, set the view to Details and run it, there will be dots around the item. Those dots will also appear whenever you select an item, along with a highlighted color. I've downloaded projects that don't have them, and when comparing I don't see any difference in listview settings between that and my listview... How do you remove those dots?
View 2 RepliesAll this code does is remove the checked items. I want to remove it from one listview box and transfer it to another. Is that possible?
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
With ListView1
[Code].....
I'm trying to make a chat room that when the user connects hes added to a listview. Im having trouble on how would i remove that client when the user disconnects.
I understand that you can do ListView1.Item.RemoveAt(Sender) but that would not work because RemoveAt only accepts integers.
Ok, I found some code online on how to do this, but they only compare the Listview.item.text, and they don't care what is in the entire ListViewItem. Is there any code to remove duplicates in a ListView that checks to see if all the subitems are the same as well and THEN removes the entry? [Code]
View 7 RepliesI am trying to make a program with a bar code reader for the first time. I am programming with VB 2005. I want to differentiate a bar code entry to keyboard entry. My questions:
1. Does bar code reader generate a keydown (or keypress) event for each of the digits of the entry? For example, if the barcode read: 1234567890, does that mean that there will be 10 keydown (or keypress) events for that single barcode that was read?
2. I have read from the posts that the best way to differentiating keyboard vs bar code input is to analyse the time between keystroke (for less than certain number of milliseconds).
I'm using VB 2008 and windows vista. I'm using a listview in my application.(view=details) I assign an image list to listview.smallimagelist. when user try to sort the listview by clicking the column header i use the imageindex property to set an icon for that column header, this works fine. When user clicks another column to sort the listview by that, I use listview.columns(PreviousColumnIndex).imageindex=-1 to remove the sort order icon from the previously selected columnheader, but it does not remove the picture from the previous columnheader. How should I remove the icon(picture) from the previous column header?
View 7 RepliesHow can I remove items if the listview colum 2 contains a certain word?
example
Col 1 Col 2
John Hired
Joe Fired
Bob Fired
after clicking a button it would remove the all the Fired items so both the person and the fired would be removed.
I am trying to make a program with a bar code reader for the first time. I want to differentiate a bar code entry to keyboard entry. My questions: 1. Does bar code reader generate a keydown (or keypress) event for each of the digits of the entry? For example, if the barcode read: 1234567890, does that mean that there will be 10 keydown (or keypress) events for that single barcode that was read?
2. I have read from the posts that the best way to differentiating keyboard vs bar code input is to analyse the time between keystroke (for less than certain number of milliseconds).
I have a ListView with the columns 'Name', 'Expected', 'Total', and I want to add another column saying 'Recount' at the end. The 'Recount' column will ideally have a checkbox only if the 'Expected' value is larger than the 'Total' value.
So far I have got the ListView with columns and can add a check box on the left hand side, but that check box is not under a column heading (though I can probably put another column with no values in there to work around that) and it is on all of the records.
I'm using a listview in my application.(view=details) when user try to sort the listview by clicking the column header i use the imageindex property to set an icon for that column header, but I don't know how to remove that icon from that column header when user clicks another column header. How should I remove the icon(picture) from the previous column header?
View 20 Repliesthis code should delete only the selected item from the listview in a report.txt but this code delete all the data in the txt file whether i selected only one data from the listview....
Dim myFile As String = "C:
eport.txt"
Dim stream As New IO.FileStream(myFile, IO.FileMode.Create)
[code]......
I am working on my program as I'm adding the listview subitems string in the label.Do you know how to remove the listview subitem in the label when the matches are found?
Private Sub listView1_MouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs)
Dim item As ListViewItem = listView1.HitTest(e.Location).Item
Dim a() As String = Nothing
[code]....
When I use the code on above, it doesn't remove the listview items in the label when I click on the checkbox on each row. Do you know how to remove the string in the label when I click on the checkboxes in the listview while the strings in the label is matched with the listview subitems?