ListView Woes With Forms?
Aug 27, 2010
I'm using VB2008 Express and I'm using the ListView control for the first time. My problem is that I'm trying to add an item to the listview on one form (frmMain) to another (frmItems) but it's not doing it. I'm using subroutines and have discovered that it seems that the command has to come from within the form the listview is contained itself. But even if i have the subroutine in the same form, it doesn't work if i call it from the 2nd form.
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May 25, 2012
I have a DataGridview in which one column is a checkbox. I use the following code to check/uncheck the box whenever the cell is clicked.
Private Sub dgUnscheduled_CellClick(sender As Object, e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgUnscheduled.CellClick
If dgUnscheduled.CurrentRow.Cells(0).Value = True Then
[code].....
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Jan 6, 2012
i have a list that has things that needs to be looped. This list can be up to 500k items.I would like to add a multithreading option with a variable. This is not an issue, as I know how to make multiple bgw's (Code below)
i = spin_NumOfThreads.Value
Dim bgwrks(i) As System.ComponentModel.BackgroundWorker
For Each bgworker As System.ComponentModel.BackgroundWorker In bgwrks[code]....
so in that code, it'll make the number of threads based off of my spineditor.Now, ideally i'd like it to go through a list, each thread does its thing.Now, a simple dowork would just allow it to do 1. i would ideally like it to stay @ X threads until the list is done, so how would I basically go about remaking a thread once it finishes to continue? So, lets say I have 50 items in a list, i set the number of threads to 5.The first 5 would do the first 5 items, when the 1st one finishes, it works on item 6, then the next would do 7, etc. and it'd keep remaking until 50 is done.
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Jul 16, 2010
This is probably a really easy question but i cant seem to find an answer anywhere.I've got a datagrid in which the first 2 columns are comboboxes.I have them populating from 2 different datasets but what i need is for the second one to be filtered, depending on what is selected in the first.How is the best way to pass the selected value from the first combo to the query in the second?On a related note, how can i set the combos to values i pull back from a query?Basically I'm running a query to pull back a load of information that has been previously entered and then populate the grid so that it can be viewed/amended, but i cant seem to set the value (or the display value) to what i pull back, even when it appears in the list of options in the drop down.
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Apr 21, 2009
I am having a problem regarding to pass all the data on the listview from one form to another and add another columns. The purpose of my columns is that I want to put text from there because I am sending a mail but I want to get the status of my message if it failed or send and write it at every end of the rows.
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Feb 26, 2010
i have a form app that needs to get the output of a console app in real time.or as close to it as possible.[code]that is my code so far, and it seems to work great for everything other than the actual console app i need it to.when i use it on ping commands it comes up in my text box perfectly.when i use it with my console app (which i don't have access to the source for) it outputs nothing until the app closes, sometimes.it depends on the arguments given. i am 100% sure it is the way the app is written but there is nothing i can do about it.so is there any way to get the desired functionality some other way?
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Feb 25, 2011
I'm trying to figure out how to get mixed-language support working in Visual Studio 2008. In my app_code folder, I've created two subfolders (CS, VB), and added the following to the web.config file:
[Code]...
The main application is a VB.NET Web application (with a .vbproj file). Any time I attempt to open a C# file from the app_codecs folder, it treats the file as Visual Basic for compilation and syntax checking purposes. It still tries to build the classes in the CS folder as though they were Visual Basic. (The extension on these classes is, indeed, .cs.)
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Oct 10, 2009
I have an AppBar application that I've added a few drop down menu items and context menus to, but each and every time I try to access the menus, they appear outside of the form. This is what's happening with the drop down menu button I've added to my status strip, and context menus show up on the right side as well.
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May 14, 2011
When changing a textbox border style to "none," and the font size to anything higher than the default 8.5, everything is fine unless if the letter goes downward ('g', 'y', 'j', etc). This is most noticeable with the g. I've linked a picture here, and I have no solution to have each character come out clearly. If I'm using another textbox border, it works fine. If I use the font size of 8.5, it's fine, but I can't have no border and a larger font. Though the textbox changes size it does not change enough to show the tail of the g. I can't change the size of the textbox because i
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Aug 8, 2011
I have a content page linked to a master page. The master has the toolkitscriptmanager. On the content page, I have a nested repeater within the item template of the parent repeater, I have a CollapsiblePanelExtender for the child repeater control. Upon partial postback, if the collapsed attribute is not set, then all of the panels expand. If the collapsed attribute is set to true, then all of the panels are collapsed upon partial postback.
The databinding of the repeater is occurring in the page_init section of the code behind, and I am checking the state of the panels by iterating through the items in the page_load event. Nothing appears to be working, while debugging the code, I do see the properties being appropriately set, but when rendered in the browser, all panels are open. The edit event that triggers the partial postback is preformed in a modalpopup.
I have attempted to move the panels into their own update panel, remove the update panel, place the modal outside of the update panel to no avail. The ViewState is not maintained.
Page Code:
<asp:Repeater ID="rptrConsultants" runat="server" OnItemCommand="rptrConsultants_ItemCommand" OnItemDataBound="rptrConsultants_ItemDataBound">
<HeaderTemplate>
[code]....
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Nov 16, 2010
I am having problem with using multiple Splits for an entry to be populated to my listview columns.
Here is my
Sub AddProcess(ByVal client As Connection, ByVal strings() As String)
For i = 1 To UBound(strings)
Dim firstsplit() As String = strings(i).Split("|")
[Code]....
Now I am trying display the result in 3 different columns of my listview and to split them into 3 parts. From my code above, what I am getting is A, B:C, and C in my columns instead of A, B, and C. I know the problem is due to the firstsplit itself where its only splitting the packet based on | while leaving the B:C as a result. I can't figure out how to split them to A, B and C.
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May 12, 2009
I am using a textbox which handle the name of the employee and when it get focus i am using a listview with detail view which shows all available employees and user have to select any of them. I am using all this control in a panel, unfortunately listview need more size then panel, and i cannot increase the size of panel. But placing listview inside the panel make its child control and hide the half list view. Is there any way that i can show full list view control under the textbox?
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Dec 23, 2009
I have two forms frmA, frmB. I have a listview on frmA with a couple items with tags. In the listviews Itemactivate event I get the FocusedItem's tag and open frmB. Everything works fine until I close frmB and come back to frmA. The original item is still selected but the Itemactivate no longer opens frmB. I can step right into the frmB.Show line on frmA, it's just that frmB nevers shows.
Private Sub ListView1_ItemActivate(...) Handles ListView1.ItemActivate
Select Case ListView1.FocusedItem.Tag
Case "showfrmB"
[code]....
I've tried adding Hides, Activates, etc. with no luck.
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Jun 15, 2011
I have an issue in a project trying to auto-scroll down a ListView (used as Details with columns) when adding a new ListViewItem when the window is minimized. I guess we have to use TopItem property to set force the listview to scroll down.I get two exceptions when the form is minimized: "Object reference not set to an instance of an object." "Index (zero based) must be greater than or equal to zero and less than the size of the argument list."
I'm just using standard .Net components (Events/Delegate) with standard way to use them.
I made a small test code to isolate the issue:
[Code]...
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Jun 11, 2011
i'm a programming student and a newbie in forums. How can I search for a data in listview from fist form using my second form?For example, I entered 7 entries to my listview, and when I press "Search in listview" button, the second form will open.(My first form contains the listview table and a button named "Search in listview", while the second form contains a textbox which I'll type what I want to search,for example the ID Number, and a button named "Search".)To shorten my code, I like to use from the System.IO Namespace.Is it possible to use System.IO? How? It is frustrating that I can't even find it in Google.
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Nov 7, 2009
Here is the code I am playing around I am getting error populating the table cells into my listview. In my codes it is always add only in one cloumn in my lv.
Private Sub DumpTables()
Dim t, c As Integer ' Used to count tables and cells.
Dim IWebDocument As HTMLDocument
[Code]....
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Jan 4, 2010
an anyone show me an example or source code of how to load the value of a selected index value to a textbox using onclick event?
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Nov 13, 2010
I have created a client and server application where the clients will be run on multiple computers while the server application will be run on the host computer in the same network. So far I am able to list all the connected clients in a ListView on the server application with the IP addresses and computer names of the client computers.
[Code]...
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Sep 14, 2011
I got one problem. I did simple listview-saver, (with 1 line) and all working (import, export)...
But i want to add new colums. But I don't know how to export or inport them.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox4.Text = TextBox1.Text & vbNewLine & TextBox2.Text & vbNewLine & TextBox3.Text & vbNewLine
Dim str(3) As String
Dim itm As ListViewItem
[Code]...
This code is with adding items to colums, but it saving only first item from line. Anybody know how to export and import all items from line?
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Jun 24, 2011
I have a simple Windows application, it list all Directories from a specified path in a liestview. My Listview have 2 column. First one show only icons and second one is the name of the Directory. Now i have a context menu "open dir". It should be open the Directory in/with explorer - Doesnt work.The Problem part, i think, is following event: ToolStripMenuItem1_Click
Here is my
Imports System
Imports System.IO
Public Class Form1
[code]....
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Jan 2, 2011
i am having trouble loading data into listview from access database
Try
Dim iForLoop As Integer
Dim ds As DataSet
[Code].....
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Apr 27, 2010
It has the ability to recursively grab all .wmv and .mp3 files in any chosen folder, and add them to a playlist.When opening the playlist, my program adds all the songs to an array, then starts adding the songs to a listview, categorizing them by song, artist, album, and genre, using a dll to access the ID3v1 tags on the .mp3 file.It can successfully create playlists of thousands of songs at a somewhat okay speed, the problem is loading that into the categorized listview.It used around 75% of my friend's CPU while loading his 5k+ song playlist into the listview, and it never finished after loading it in for a couple minutes (it auto updates as it loads, because it is done in a new thread.) It never finished because his OS has a bug where, if the CPU usage is over 100% for more then a few mins, it BSOD's, but that's beside the point.
His CPU, by the way, is a quad core 2.33 GHZ processor.The listview loads thousands of songs by using a lot of CPU [low amount of RAM, less then 40MB 99% of the time], and it does it slowly. [code]I've already redone the sub once or twice to speed it up, and at the moment it's 2-3.,
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Jun 9, 2011
I've tried this but it's giving me 'System.NullReferenceException':
For Each MyListViewItem As ListViewItem In MyListView.Items
MsgBox(MyListViewItem.SubItems("MyColumn").Text)
Next
[Code].....
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Oct 16, 2009
I'm trying to display all services on a computer into column 1 under Processes and column 2 as services. I can't figure out how to do this with the WMI statements.
Here is my code......
Private Sub OKButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OKButton.Click
[CODE]..................................
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Aug 23, 2011
how to search partial string using textbox from listview in vb.net 2005?example i have my record in listview:
Apple
Grapes
Mango
now if im going to type string in textbox like "pl" only, then the selected items will be the apple.
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Mar 23, 2010
I have been playing with, and researching, this all day and can't figure it out. I have a Windows Explorer style form with a TreeView and a ListView. I've populated the TreeView with directories and when a node is selected, the ListView fills with the contents of the directory associated with that node. No problem there, but I want to be able to select a directory in the ListView and automatically select the associated node in the TreeView, just like it works in Windows Explorer. All the information I've found online tells me how to populate the ListView from the TreeView, but I haven't found any good examples of how to populate the TreeView from the ListView.
[Code]...
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Nov 1, 2011
What I am trying to do is to instantly apply a filter to a large list of data such that the list is updated almost immediately regardless of the number of items in the list. I have this working using a listview right now but it is far from instant, a list of 5000 items takes over a minute to get through. What I do currently is to maintain a cache of my data that my listview entries are based on. When the user selects a filter I parse this data one item at a time and determine if each item should still be displayed in the listview, if not I remove it. The complexity of determining whether or not a data entry meets the filter requirements is O(1), but just getting through each element in a loop takes significant time, and so does updating the list view graphically at the end of the process.
I have considered using a datagridview instead, using a database connection. I have never done this before and my main question here is whether this would allow me to do what I have described. With the database I could form an SQL query to return only the items that meet the new filter requirements... but would the data in the form update immediately, or would there still be significant delay?
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Feb 9, 2012
I have an application ..windowsform [my solution name]
I am using CheckedListBox .. whereas I want ListView instead of CheckedListBox
but I get the following error
vb.net
ListView.Items.AddRange(DirectCast(ListBox.SelectedItem, [produts]).files)
error for this code
Overload resolution failed because no accessible 'AddRange' can be called with these arguments:
'Public Sub AddRange(items As
[Code]....
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Jun 16, 2012
I have designed a form which contains a listview(to see the list records) and textboxes (used for adding or updating).an already save record into table using this
cmd.Connection = con
cmd.CommandText = "INSERT INTO student_info_tbl VALUES('" & txtUserId.Text & "','" & txtFirstName.Text & "','" & txtMiddleName.Text & "','" & txtLastName.Text _
[code].....
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Mar 12, 2009
i want to format listview head of listview textalign = center and item of listview textalign = right
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