VS 2008 How To Implement "filter" Into Own Bindinglist
Jan 7, 2012Dim tempList As New BindingList(Of Advocate)(advocates)
Dim bsource As New BindingSource
bsource.DataSource = tempList
[code].....
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VS 2008 - Session Serialization And BindingList (Of Items)
Jan 28, 2010I have created a huge monster based on generic objects and the BindingList. It is a web app that has users, security rights and restrictions, as well as the business logic to persist to the database. I have been using inProc sessions but each user creates about 50 megs of memory. I was initially told that would not be a problem, that a few users it at any time, and the items in the collections were supposed to be lot smaller, but I digress. For the amount of processing that the app has to do in real time, and for how it manages the data, the data it produces is 100%.
The speed and performance has been superior, but the only problem was it was on a box that was used for alot of other applications and it would run out of memory. I have since put it on Server 08 and have placed the Serializable attribute on all classes. I get a an error how ever when the web app tries to serialize the session. I get the feeling that there is an unsaid concensus that inheriting from BindingList is not supported by .net sql or state server session handling.
VS 2008 : Filter The Results Of A Datagridviw Using The Bindingsource.filter Method?
Mar 20, 2009I am trying to filter the results of a datagridviw using the bindingsource.filter method.
Dim filters(2) As String
...
If Me.txtPartIDFilter.Text = "" Then
[code]....
The issue is in the last line. ID_Part is an Int64 data type filters(0) is a string so the system returns a "Can't perform 'Like' operation on System.Int64 and System.String" error message.As you can see I tried converting the data type, but that failed since it is encased in String.Format()- it's going to be a string no matter what, I suppose.It's almost 1:00 a.m. so I'm not firing on all cylinders.
Take Clone Of BindingList Object
Mar 10, 2011I have a object collection type of BindingList(of T), i want to take same copy of the object. but the problem is when ever i made the changes in the copy then the original object also reflect that change, how can i avoid it .
View 1 RepliesUsing Bindinglist As Bind For Textbox?
Sep 9, 2010I have a bindinglist. i am using a textbox to show its itemsWithEvents xBind As New BindingList(Of Emp)
I added items this way
xBind.Add(New emp("alpha0", "B"))
xBind.Add(New emp("alpha1", "B"))
[code].....
.net - Getting The Index Of Deleted Item From Bindinglist?
Aug 7, 2009I am able to get the index of items added to the BindingList. When I try to get the index if the deleted item I get the error Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
Here is my code
Private Sub cmdRemove_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdRemove.Click
For i As Integer = 0 To _assignedSelection.SelectedCount - 1
Dim item As Jurisdiction = CType(_assignedSelection.GetSelectedRow(i), Jurisdiction)
_list.Remove(item)
Next
End Sub
Private Sub list_Change(ByVal sender As Object, ByVal e As ListChangedEventArgs) Handles _list.ListChanged
[Code]...
Binding Two BindingList<of T> Object To The Grid?
Jan 18, 2009Is is possible to bind two BindingList<> object to the DataGridView? Both the bindinglist objects are of the same type. I tried binding an array of BindingLit<> object to the grid, but this fails.
View 3 RepliesReflection - Getting Item Type Of A Bindinglist
May 27, 2010I am trying to write a function that has an object parameter. That object will always be an BindingList. That BindingList will be of some unknown (at design Time) class. I think I've figured out how to get the type of the collection object, but now here the tricky part. I'm trying to create a function that can handle any type of collection and be able to return an item from that collection. I need to create a new object of that type and return it from the function. [Code]
View 1 RepliesSelect Distinct Items From A BindingList?
Jun 5, 2010I have set up a class to hold song information - artist, title. I then created another class that containg a BindingList(of clsSong). I use this binding list to create a data object that can be used to create an RDLC report. This all works. Now I am trying to remove duplicates from the binding list so they don't show up twice on the report. I can't figure out how to get a distinct list for my report. [code]...
View 3 RepliesUse BindingList(of T) To Bind To A Listbox Or A Datagridview?
Nov 16, 2009I am using VB.net 2005 I have a form with a DataGridView on it called "DG"
Here is my Code:Option Explicit On Option Strict On Imports System.ComponentModel
[Code]...
.net - Winforms, BindingList, BindingSource - Cannot Bind To Property/column Id
Feb 28, 2011I have the following code on a form:
Public Sub Init(ByVal SelectedItems As List(Of Cheque))
Items = New BindingList(Of Cheque)(SelectedItems )
BindingSource1.DataSource = Items
[code]....
This code gets called like so:
...
fmEdit.Init(myList)
fmEdit.Show()
All variables are populated etc, it seems to go through the DataBindings.Add ok but when the form appears I get the error about unable to bind to a property or column called Id. I tried replacing the DataBindings.Add code to use the BindingSource1 instead of Items but I get a similar error.The names of the properties in the class match that of the name in the Databindings.Add code.
UPDATE: Here is my class:
Public Class Cheque
Public Id As String
Public Status As Byte
[code]....
IFF Is Not Null Query - Filter A Sql Db With Many Filter Criteria Which Inert The User In Textboxes
Feb 15, 2012I m trying to filter a sql db with many filter criteria which inert the user in textboxes .. i ve tryed this query
[Code]...
Binding Source.filter - Filter My Access Database
Oct 10, 2011I'm trying to filter my access database and when I "search" by name, it works, but when I search by policy number it doesn't seem to work.
Here's my code:
If RadioButton3.Checked = True Then
Form3.Show()
Me.Close()
[CODE]...
Databinding.filter - Filter Date And Also Time (shortime)
Sep 20, 2010i want to filter date and also time (shortime) for example if Datum.hour="8:15" andalso Datum.day of week "Saturday"or "Monday" now i can only filter date ... this is my filterline objbindingsource.Filter = "Datum > = '" & Dtp1.Value.Date & "'"
View 5 RepliesVS 2008 How To Implement A Silverlight Control In Vb 2008
Dec 23, 2011I want to build a flip clock for my vb 2008 form.But I cant seem to get it done.So I searched and found a flip clock control for not Vb but silverlight.Here is the link
[URL]
Is there a way I can use this clock in my vb form.
Implement Networking Through .net 2008?
Mar 23, 2009how should i implement networking through vb.net 2008?
View 6 RepliesVB 2008 - How To Implement The Keyword, Me
Dec 16, 2009I am working in vb2008. how to implement the keyword, Me. I see it used in code examples but when I try it, it does not work.
View 3 RepliesVS 2008 How To Implement The IBindingListView
Oct 19, 2011I have a custom object that I would like to turn into a Collection that could then be used in a BindingSource. From what I've read, I can Inherit Collection(Of T) where T is my specific object. Then I can Implement IBindingListView. This is all great, but I have no idea how to actually use the IBindingListView Interface. I know I want to be able to sort and filter my collection, so I have the following.
Imports System.ComponentModel
Public Class ChemicalCollection
Inherits Collections.ObjectModel.Collection(Of Chemical)
[code]....
As you can see, I haven't really done anything other than let Visual Studio fill in the required properties and methods when I implemented the interface.
Datagridview - Use Filter With LIKE Clause When The Filter Text Contains %?
Feb 13, 2012I want to filter a text in all columns in a datagridview. So I use Like % in the filter text. However, I found that the text(strFilter in my code) may contain % sometimes. So it have a syntax error. How can I use filter with like clause when the filter text contains %?
Private Sub PassFilter(ByRef dataTable As DataTable, ByVal strFilter As String)
Try
Dim dataview As DataView = dataTable.DefaultView
[Code].....
Sql Server - Filter Row And Put It In A Textbox And Filter Another Row In Another Text Box?
Mar 16, 2012i want to filter row and put it in a textbox and filter another row in another text box vb.
ex.
ID--------- Date -------- msg_num ------------ Message <<
10001 -- 01/01/2012 ------ msg1 ------------- Blah! Blah![code].....
Implement Clickonce Like In 2008 In 2003?
Sep 16, 2010i would like to ask if it is possible to implement clickonce like in vb2008 in vb.net 2003?..example:i have a button "Update" in my application running on local machine...if i click it it will check the remote server if there is an update of that app.if yes then download it an change the application on local machine...
View 22 RepliesVS 2008 - How To Implement New Encryption Algorithms
May 28, 2009I want to try and use the new encryption algorithms provided with .NET 3.5. Any links or examples for how to use one of them to encrypt xml content?
As written on msdn site is:
The following algorithms are included:
Advanced Encryption Standard (AES) with key sizes of 128 and 256 bits for encryption.
Secure Hash Algorithm (SHA-256 and SHA-384) for hashing.
Elliptic Curve Digital Signature Algorithm (ECDSA) using curves of 256-bit and 384-bit prime moduli for signing. This algorithm is provided by the ECDsaCng class. It allows you to sign with a private key and verify with a public key.
Elliptic Curve Diffie-Hellman (ECDH) using curves of 256 and 384-bit prime moduli for key exchange/secret agreement. This algorithm is provided by the ECDiffieHellmanCng class.
VS 2008 Implement Multiple BackGroundWorkers?
Mar 24, 2009I am making an application that has a tabbed interface. Each tab uses a UserControl with the controls that I need on it. The user enters some data & clicks a button, which starts a lengthy process. I would like to run that process in a BGW, so that the user can switch to (or open) another tab & process another set of data simultaneously.
View 7 RepliesCommunications :: 2008 - Implement A Barcode Reader ?
Aug 10, 2011I am wondering how to implement a barcode reader on vb.net 2008. I haven't started creating a program yet. I have only these simple questions
How to declare Barcode Reader on vb .net?
If I want to scan a product on the barcode reader how to catch the data that is being scanned?
VS 2008 : Infinite Undo/redo: How To Implement It
Apr 4, 2011basically add and remove text and selection information from a stack. Result: When using Undo/Redo the selection got messed up, the text moved, sometimes causing lag of epic proportions. I need a way of having complete and smooth undo/redo class for storing all information I would possible need.How to know whether or not to add an undo stack is easy, I just checked if the user clicked in the text or moved using the arrow keys. As soon a previous marking was given for "next text change needs to be backed up", it was backed up. At that point I stored the RTF and selection start/length. What do I have to store of a RichTextbox control to be able to restore it to a previous state, and how can I reset it back to a previous state? See it as having a "RichTextBoxState" class:
Public Class RichTextBoxState
Sub New(ByVal RTB As RichTextBox)
Me.text = RTB.RTF
Me.selectionstart = RTB.SelectionStart
[code]....
After restoring it must display the EXACT same thing as when it was saved as a state.
VS 2008 - Implement Event To Detect User Inactivity
Jul 30, 2011PROJECT TYPE: Windows Forms Application
LANGUAGE: Visual Basic
.NET VERSION: 3.5
IDE: Visual Studio 2008
OPTION STRICT: on
OPTION EXPLICIT: ON
I am developing a parental control application containing a feature that logs a user off of the computer after an administratively set period of time. I do not however want the application to continue counting time against the time limit when the user is not active on the computer. EXAMPLE: Child logs on and is active for an hour then leaves computer for 45 minutes to get dinner. The session timer needs to ignore the 45 minutes of inactivity. I have thought of two ways to accomplish this.
1) Use a SystemEvents.SessionSwith event (to detect the Start Menu > Log Off > SwitchUser action), or
2) Use an event which would detect user inactivity in excess of a set time, e.g. 5 minutes (similar to a screensaver).
Either event would call a method which would simulate a pause feature (as StopWatch and Timer have no pause support that I know of). I believe the 2nd option would prove to be more universally affective as 1) some users do not have Fast User Switching enabled, and 2) users would be required to manually switch users in order to prevent their inactive time from counting against them. My problem arises when I attempt to implement one of these methods. According to the IntelliSense error checking engine, I have absolutely no clue how to do either of these tasks in spite of the research I have conducted on the topic. I would prefer to go with the system idle time approach.
VS 2008 BindingSource Filter?
Jun 12, 2011Private Sub LoadMovieDetails()
Try
Dim cmd As SqlCeCommand
[code].....
VS 2008 Can't Filter The Text
Oct 31, 2010i have this text
[Code]....
3d 04h also this could be random, anything. thats why i cant filter it <SPAN>(Nov 03, 2010</SPAN><SPAN class=vi-is1-t>17:23:00 PDT)</SPAN>
VS 2008 How To Filter 2 Columns
Jun 13, 2011I can filter BindingSource base on 2 columns. Example data starting with "s" in column A & column B must be filtered.
View 5 RepliesVS 2008 Using LIKE In DataTable Filter?
Nov 9, 2011I am writing part of a function that tries to search for a username in a list in a rather broad way (last resort). It seems that LIKE does not like trying to match only the first and last characters.
strCriteria = "somename"
drFilter = tblUsers.Select("User LIKE '" & Strings.Left(strCriteria, 1) & "%" & Strings.Right(strCriteria, 1) & "'")
[code]....