I've been studying the example of what I think is an overridden ListView class posted at MSDN: [URL] Am I correct in assuming that this is, in fact, an overridden ListView class that I can use in place of ListView as an OwnerDrawn version of ListView, and which I can modify to my liking as I make sense of how to do so?
View 16 RepliesSimple Question about .Net processing:
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(using VB.Net 2008) I'm inheriting from a class, and overriding one of the properties. However, the original property has public get & set, whereas I want to make it read-only in my derived class, because the property in my derived class is already determined by other factors. But it appears I can't change the access level of any overridden method. Is this possible?
The closest analogy I came up with is suppose you have a Person class, with a get/set Address property. Now suppose you inherit Child from Person, and Child will have a new Parent property. Say you want the Child's Address property to be readonly, because it will simply return the address of Parent. Even if you can override the Address property, you can't make the Set non-public. The best I can do is make it throw an exception but that's obviously misleading during design time.
Given a list of objects, I'd like to print a string version of them just in case the object.ToString() result is a relevant string.By that I mean I don't want to get things like:
obj.ToString() -> System.Collections.Generic.List`1[MyLib.Dude]
obj.ToString() -> System.Collections.Generic.Dictionary`2[System.Int32,System.DateTime]
obj.ToString() -> System.Byte[]
But I want to get things like:
obj.ToString() -> Hi
obj.ToString() -> 129847.123
obj.ToString() -> Id = 123
What should be the best way to implement this in a method:
Public Sub PrintInterestingStuffOnly(ByVal coolList as Ilist(Of Object))
For Each obj in coolList
'insert solution here
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I have a simple Windows Form that hosts property controls at runtime. When the user clicks Close [X] I want to keep the window and its contents alive rather than killing it by handling the FormClosing event, canceling the event and simply hiding the form.
That's fine but at close of the application I need to actually close the window. I implemented the below but it feels kludgey. Is there a simpler, more clever way to handle this situation? (The form's controller calls KillForm explicitly after it receives a closing event from the main window.)[code]...
I have a usercontrol which overrides the property Text. But this property is not shown at design time.If I rename it to caption or value it is shown in properties at design time but Text is not shown.
public Class SomeControl
Inherits System.Windows.Forms.UserControl
Public Overrides Property Text() As String
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rewriting a class I use for saving Treeview data to a XML file for use of saving ListView data I can't really figure out the rewrite, I'm stucked, unfortunately Listviews seems to be a big problem for me in general.
Option Strict On
''' <summary>
''' The TreeViewDataAccess class allows the nodes within a TreeView to be
''' persisted to xml for later retrevial.
''' </summary>
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I have a vb-2008 program that contains a (listview) control.
View = details
AllowColumnReorder = true
Lets say the table has 3 columns (a,b,c) and 1 row of data.
a b c
1 2 3
I want the user to be able to re-arrange the columns (by dragging the column headers) before printing the contents of the table.
c a b
3 1 2
Statements like:
.. ListViewX.Columns(2).Text
.. ListViewX.Columns.Item(2).Text
.. ListViewX.Items(0).SubItems(2).ToString
Give the column-name (c) and cell-contents (3) of the origional table .. not the (3rd) column (b) of the re-arranged table.
How can i get the column-name and cell-contents of the (3rd) column of the re-arranged table?
Do I really have to go through all this just to find out what item has been selected in a ListView?
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Isn't there something fundamental like this? Is absolutely everything in VB.NET buried beneath a colossal heap of bureaucracy?
i am developing a point of sales system. currently i have my product code scanned and displayed in a listview. lets say that i have 5 product codes displayed in my first listview. By clicking on a button, how can i use these codes to call upon the details (prices, product name, etc.) of the corresponding codes and display in another listview?
i am using Visual Basic 2008 and MsAccess as my database. who have the idea on solving my question. (As my last thread has not been answered at all..
I have created a user control in wpf which consists of a textbox and a listview. Now, I want to bind a class object to the list view from the form where I will use this control. So, basically I want to dynamically set the binding for the listview.
View 1 RepliesHaving a class that defining ListView in a class, then passing through the methods as an object (listview)
but having error on
Value of type 'System.Windows.Forms.ListView' cannot be converted to 'Proj.MainForm.ReadMsgClass'.
Public Class ReadMsgClass
Public ListView2ReadMsg As ListView
End Class
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I want ListView instead of CheckedListBox files in checkedListBox is being updated via ListBox1 How can I add the size of file too in listview
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I have a two-column ListView linked to a Datapager. The ListView lists all files of a particular type in a particular directory, so the data source is an ArrayList of type FileInfo. Consequently, I had to create a Comparer class to use in the ArrayList.Sort method.
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I inherit from ListView. I want my control to have an AllowCheckBoxes property rather than a CheckBoxes property.
Listview.Checkboxes is not overridable.
Can I add attributes to Listview.Checkboxes? Maybe the following?
<Browsable(False), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)>
If not, does the following make sense?
<Browsable(False), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)>
Public Property Shadows CheckBoxes() As Boolean
Get
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What about using
EditorBrowsableState.Never)
I'm trying to use a custom listviewitem class that attaches additional information to a lisview item. Here is the class:
Public Class albumListViewItem
Inherits ListViewItem
Public hash As String
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When I try to cast a listviewitem to my custom class like this:
Dim albumItem As albumListViewItem = CType(lsvHidden.items.item(0), albumListViewItem)
I get the following error, "Unable to cast object of type 'System.Windows.Forms.ListViewItem' to type 'AudioMatic.albumListViewItem'."
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I know how to do the code shown in ClassA and ChildClassB, but how do I go about coding the example in GrandChildClassC, which needs to not do the stuff that ChildClassB does in this function, but still do what Class does.
I am trying to create an list or an array of a class.Here is my "Ingredient" class that I am trying to create a list of:[code]In my "recipe" class, I am want to create a list (or array) and I am drawing a big blank on how to do it. Can anyone point me in the right direction?
View 2 RepliesI am searching for the Component Class. When I go to "Add New Item" ,in my project their is no Component Class Item in VS 2008. I would like to Drag and Drop control onto my new class and I can't see how to do this ?
View 6 RepliesI have a 'property management class' that contains several functions and properties. I have several other classes that use the 'management class' as a property to derive the value of several of its other properties.Is there a way for me to reference the outer class from the 'management class' functions without having to pass it as a parameter? I ask because several different classes can have this 'management class' as a property and am having a hard time typing the parameter.
View 7 RepliesI need to grab some data from a webpage but for me the main problem is I can't grab the data the way I want. I want to grab the data in a listview control but my code is fetching all data within any span tag (span class "inputFieldLabel" which is not required) in a single column of a listview control. I am giving the format (source) of the webpage below and my coding in vb.net (2008),
<br>
<span class="inputFieldLabel">Following Are ...</span>
<span class="inputFieldLabel">01/02/2011</span>
<span class="inputFieldLabel">And</span>
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When inheriting class or control e.g. ListView, TreeView, etc..., what is the best way to distinguish between built-in methods/property/events and mine?
Currently, i start my methods/property/events with "aa" in order to make them at the top of auto complete list.
I have a listview control. it has an imagelist attached to it with two images in it. I have entered items into my listview, and they are using the first image in my imagelist.... GREAT! Now, there is a variable I have that will tell me which index in the listview is currently active, noting to do with what I select that could be at another index it's just what's being processed by the program at the time in some task.
Create a function that will change the images of all my listview items by looping through them. If the index variable is set to 2, I want the 3rd item in my list view set to use the 2nd image in my imagelist. The rest of the items in my listview need to be set to the first image in the imagelist.
i have a class call it clsFamily this class contains properties that make up a family object. This class works fine with no issues. Now i need a new class (called MyAccount) which contains 3 properties, an ID a user name and a clsFamily object. I have declared both classes as Friend from within my globals Module and define the clsFamily as family, however when i try to put this type within my 2nd class i get an error "Type 'family' is not defined" what am i doing wrong? i know i could get it to work fine by adding the ID and User Name properties to the clsFamily object but i need to define this as a new type of object as the ID and User name are not normally part of this class.
View 12 RepliesI'm using the next class to fill my listview
Imports System.Data.SqlClient
Public Class ListViewData
Public Sub FillListView(ByRef MyListView As ListView, _
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I want all the listview columns to be in auto width. I tried adding the next line of code but then only my first column fills my entering listview width. All other columns are not affected!
lvwColumn.Width = -2
If Class X is within the scope of Class Y, is X a subclass of Y?If Class A is a sub Class of B, then is Class B considered a super class of A?if Class C inherits Class D is Class D a superclass or parent of Class C?if Class E extends Class F then we can consider Class E a child of F?if Class G inherits Class H and is within the scope of Class I then who is the parent of Class G? Classes that inherits Class J and classes that are within Class J are all sub classes of Class J?
View 1 RepliesI have put this code in the global form Inherits System.Windows.Forms.Form. And then in the form that will inherit this from the global Inherits MenuStrip. "MenuStrip" is what the global form is called. But keep getting this error: Error1Base class 'MenuStrip' specified for class 'Lesson2' cannot be different from the base class 'System.Windows.Forms.Form' of one of its other partial types.
View 5 RepliesI have a class (see below)
Imports Microsoft.VisualBasic
Imports System.Data.SqlClient
Public Class ClientProfile
#Region "Variables"
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It is in the file ClientProfile I have placed in both App_Code and also App_Code/Models
In my code behind I have the following
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The last word, "ClientProfile" has the scary squiggly red line below it. It is not recognizing my class.Even the Intellisense is not picking up te class. Do I have to register the class file in any way?
i want to format listview head of listview textalign = center and item of listview textalign = right
View 1 RepliesI am trying to figure out a way to include the listview's tag field when dragging one listview's subitems into another listview. I am hoping someone here has experience with this. My Listview drag code is below - the two listviews that I am dragging subitems into or from are LV1 and LV3. Also, this is being done in Visual Basic 2008 and the project is a windows application.
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