VS 2005 : Update ListViewItems From ListView In A Buffer?
Aug 3, 2011
I'm trying to use a BackgroundWorker process to update the status on servers once a Refresh button is hit.add all ListViewItems to an ArrayList and pass that ArrayList to the worker process to update. Once it was done updating, I would clear all items from the ListView, and then refresh the ListView with the new ArrayList with the updated ListViewItems.When I get to this line of code in the RefreshListView function:
'POS_IP_ADDRESS is just a constant I created with the column index in the event I decide to change the layout of the list view columns at a later time
objItem.SubItems(POS_IP_ADDRESS).Text = strIPAddr
I get a InvalidOperationException stating Cross-thread operation not valid: Control lstStatus (my list view object) access from thread other than the thread it was created on.Do the ListViewItem objects have a tie back to the original ListView items when I pass the ListViewItems to the ArrayList? I just want to edit the objects in a buffer and refresh the ListView... does this make sense to do? Why can I not update the item in an ArrayList?
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Dec 6, 2009
Here's an interesting issue:I've got a listview on a form that will load up properly, but as soon as I get my proxy (multithreaded) going, the listviewitems inside the listview suddenly cease to exist.
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Sep 11, 2011
I already deleted the record in my database and my problem is How can I update my listview that i already deleted the selected item it wont delete in my listview i have no clue how to do it??can someone elp me with this. . . .
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
Dim SQL1 As String = "DELETE FROM Employee WHERE Employee_ID = '" & ListView1.SelectedItems(0).Text & "';"
Dim cmd As New MySqlCommand
Dim table As New DataTable
[code]....
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Sep 29, 2009
I'm reading a file into a buffer using the Space function. Then I'm using blowfish dll's to encrypt it, and want to write the encrypted data to a txt file. (I realize you can use .NET cryptography classes, but I need to use these old blowfish dll's for this project.) Anyway, when when I encrypt the data in the buffer, I can see all encrypted data, but when I write it out to a file, I get a few lines of encrypted data and the rest of plain text.
HTML
' BLOCK_SIZE is a const which = 2048
sBlock = Space(BLOCK_SIZE)
Using sr As StreamReader = New StreamReader(FileToEncrypt)
sBlock = sr.ReadToEnd()
End Using[Code] ....
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Dec 15, 2011
[Code]...
This is my code for retrieving pictures, it was working before but then i accidentally deleted the table and i created it again with the same name and same fields. and now whenever i open the form with the picture, there was a message box error. it says Buffer cannot be null. Parameter name: buffer I don't know what i did wrong.
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Nov 7, 2010
i have been working on a customer database project. i created a user control with ListView control for Customer details. and an another user control was created for Product details. both controls are placed in main form.I am trying to get Customer details and Product Details from separate thread but i faced CROSS THREAD...Error how can i overcome this problem.
this is my main process
Public _lstVwCstDet, _lstVwPrdct As New ListView
Private Sub M_ProcessStart()
_lstVwCstDet = frmMain.axCustmrCnt.LstVw
[Code]....
I want to Get List View Items and it's Subitems from an another Thread.
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Jun 10, 2012
I'm attempting to discard the contents of a System.Net.Sockets.Socket send buffer using theSocket.IOControl(IOControlCode.Flush, .... Does anybody know whether VB.NET supports this command? I've tried supplying 'Nothing' and 'Nothing' for both required parameters, also empty and populated byte arrays in combination with 'Nothing' for both required parameters, but I consistently get an 'Invalid argument' exception. I've tried a web search for an answer, but the only mention I've found was a question asked about 8 years ago, with still no answer.
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Nov 16, 2010
I am trying to sort an array of ListViewItems, here is my code for setting is up:
vb.net
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Apps(), Owners() As String
Apps = {"App2", "App1", "App4", "App3", "App5"}
Owners = {"AOwner2", "BOwner1", "COwner4", "DOwner3", "Owner5"}
Dim ListViewItemArray(Apps.Count - 1) As ListViewItem
[Code] .....
I know I can have the ListView be sorted but I want the item "All" to stay at the top. I have tried sorting the array with:
vb.net
Array.Sort(ListViewItemArray)
But I get this error: "Failed to compare two elements in the array.".
I also tried:
vb.net
ListViewItemArray.Sort()
But it says there is invalid number of arguments. Is it possible to sort this array or is there an easier way to accomplish what I am trying to do?
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Aug 27, 2009
I am trying to display the listview subitem in the Listview .Actual Problem Dispaly:I have to dispaly the three values :
BARcode CheckoutFlag TAGUID
L00657 Loo657 E00010003E
But ,I am getting the wrong display:
BARcode CheckoutFlag TAGUID
E00010003E Loo657 E00010003E
I am unable to print the barcode value.where ever Ia m able to display the Little value.The main two functions are below.
vb.net
Private Sub rfLoadtoList(ByVal iBarcode As String, ByVal iTitle As String, ByVal ImgIndex As Integer, ByVal bgColor As Color, ByVal frColor As Color, ByVal cFlag As Boolean)
Dim Srnumber As Integer
[code].....
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Jan 23, 2008
VB.NET 2005
Anyone has a quick way to copy a listview to a new listview?
It tried the following, but it crashes ..
Dim arrTemp(lvwTemp.Items.Count) As ListViewItem
lvwTemp.Items.CopyTo(arrTemp, 0)
lvwObjectsFound.Items.AddRange(arrTemp)
[Code].....
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Jul 21, 2009
I have listview with Items, i would like to update the informantion in one of the row in the listview.
[Code]...
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Feb 23, 2011
I have this subroutine and i pass 2 parameters. 1 the Printernum (it is the line that i want to change in my listview) 2 the returndata i want in the printernum line to add or update the txtonlyCounter in the 7 subitem.
[Code]...
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Aug 24, 2010
I had a form here with 3 texboxes, 1 combox and 2 dtpicker. When I tried to update my database with this code:
Dim cn As ADODB.Connection
Dim rst As ADODB.Recordset
Dim Con, sql As String
Dim i As Integer
Con = "Provider=Microsoft.jet.OLEDB.4.0;Data Source=C:NOSDE\_MDBNOSDatabase.mdb"
[Code] .....
All of my records has change. for example I have a 5 records of different people, I've pick the first record and update it, then after I've save it, the remaining 4 records change with the same name as I pick the first record.
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Mar 28, 2012
the GUI shows that (in the listview portion) when i click sa "save" button, the item/s in the listview will be updated to the "remaining stocks" (datagridview portion).
Here is my running code for that
Dim a As Integer
Dim y As Integer
Dim x As Integer
[Code].....
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Feb 27, 2012
I am using a Listview to update database. It works perfect for the first row in listview. How can I update my database if there is more then one row in listview?I have 6 columns in listview.
Listview Property changed to:
Hideselection = false
Multiselect = false
Fullrowselect = true
My Code:
For y = 0 To ListView1.Items.Count - 1
If (objcon.con.State = ConnectionState.Closed) Then objcon.con.Open()
cmd1 = New OleDbCommand("UPDATE Customers SET " & _
[code].....
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Jun 26, 2009
I load a bunch of files into a wpf listview and want to update the content of the listviewitems after loading the files, eg:
1. load the files from a directory into the listview - that's okay
2. Start a background worker and replace the full filename with only the filename and extension on each listviewitem. How could i achieve this using dispatcher or background worker?
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Aug 30, 2010
i have a list view on my form and i'm having trouble on how to code to update the subitem on the listview.
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Nov 3, 2011
I have a 3rd windows form opened and I have 2 textboxes to add Username and Password as well as a button that says add account. Username is named as Email2 and Password is named as Pass2 and the button is addaccount2. The forms are named Form 1 Form 2 and Form 3. I have a listview in form2 that has columns with names and im trying to get it to when you fill in the info on Form3 the username and pass and click the Add account button it will put it in the listview box but I would like it to be so username would be under the username column and password to be under password column under Form2 in the listview.
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Dec 4, 2011
I'm having difficulty trying to figure out why I can't seem to update the data I selected from the listview. I keep getting an error saying 'Invalid column name'. Can anyone help to fix this issue? I've tried for hours, but can't figure it out. [code] It doesn't seem to update for the others.
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Jun 22, 2010
i have some problem with the listview control i dont know how to use it
[Code]...
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Mar 15, 2012
i am using a listview on my admin form to see those who are logged in. so i have a table which captures users logging in and logging out. this table data is reflected onto this listview. but i want the listview to refresh itself as soon as the user has logged out. this way the admin doesn't have to keep pressing refresh.so i want to know if there is way to refresh the listview on database update.
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Dec 14, 2011
I can't find a proper answer on how to update the ListView after I inserted another item. When I add ListView1.Clear() and DatabaseSelect() in Button1 there was nothing to view.
How do I refresh my ListView everytime I insert new items?
Here is the code of filling the ListView:
Function DatabaseSelect()
Try
myDA.SelectCommand = conn.CreateCommand()
[Code]....
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Feb 23, 2011
I have this subroutine and i pass 2 parameters.
1 the Printernum (it is the line that i want to change in my listview)
2 the returndata
i want in the printernum line to add or update the txtonlyCounter in the 7 subitem.
Dim txtCounterLength As Integer = Len(returndata)
For i = 1 To txtCounterLength
FindBlank = Mid(returndata, i, 1)
If FindBlank = " " Then
[code]....
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Jun 15, 2012
Environment = VB.NET 2005 & Pervasive SQL 9.5 ADO.NET In a simplified example, I have single database table (customers) with the columns "customer_code_PK" and "customer_name" This table is presented in VB.NET 2005 as a single form datagrid (bindingsource/dataset). In this example, the database table is populated with the following data
customer_code_PK customer_name
SHELLShell Oil
BPBritish Petrolium
MOBMobile
In very simplified terms, code does the following;
sub on form load
fill dataset with database records (select * from customers)
[code]....
The datagridview loads the records correctly.Here is the sequence of operations that produces the bizzar behaviour.In the editable datagrid;
1.remove the row with PK = MOB -> save_button -> Database correctly updates
2.add a new row with PK = KFC -> save_button -> Database correctly updates
3.remove row with PK = SHELL -> save_button -> Database exception occurs
On this last command, the row SHELL is INSERTED!!, not removed.However, If I change ths save_button routine to this
save_button
call generate_custom_updateinsertdeletecommands
bindingsource endedit
[code]....
It works correctly !Is it correct that you would need to "refresh" the sql update commands after every tableadapter.update?
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Aug 28, 2011
How to delete a record in the listview and will update to my database?[code]....
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Jul 1, 2011
I am trying to update a ListView control from 10 background worker progress. It is working well if there is only 1000 list in ListView control. But when the list is big then the update is not working properly. The different value is not updating the appropriate list index. Here is my partial code of worker progress:
Private Sub worker1_ProgressChanged(ByVal sender As Object, ByVal e As System.ComponentModel.ProgressChangedEventArgs) Handles worker1.ProgressChanged
SyncLock updmxresult
[Code]....
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Jun 19, 2012
right now i'm trying to google some related article about LINQ to better understand it. But I came across with this issue been googling to find some answer but I didn't get lucky so here my problem.
For Each lvItem As ListViewItem In lv_orderlist.Items
passSQL = "INSERT INTO t_selling_history (f_product_id_fk, f_qty, f_qty, f_user_id_fk, f_created_dt, f_trans_status)" _
[code].....
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Jun 23, 2012
Imagine you expand onto 'Sofas and armchairs' and click 'fabric sofas', it will redirect to next page on click and it will send data '10661' to the next page. Then the listview will updated with reference '10661'. After that click on another link, maybe leather sofas. The listview will re-update table with new reference '10662'
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Sep 5, 2011
I want to update my data in SQLSERVER with listview checkboxes. but how do I update those selected values?
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May 21, 2011
I have a listview which contains information. This information is retrived from database, 'till now ok. The problem is: I must update the existing items on listview and insert the new ones.
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