Two-way WPF Binding To Properties Of A Class Inside Of An ObservableCollection

Nov 17, 2011

I've searched as best as I can, and I can't find an answer to this specific problem that I have... WPF binding seems to be great and all, but I end up banging my head against the wall more often than not.

Okay, I have a singleton class which is ultimately the one that I'm binding to:

Imports System.ComponentModel
Imports System.Collections.ObjectModel
Public Class AmandaSeyfried

[Code].....

If I throw some break points on the Getter and Setters of the CountryTranslation class, I can monitor when they're being changed (via the datagrid, so binding is working), but try as I might I can't figure out how to raise an event based upon that back in the main class to subsequently update the datastore to show the changes.

View 1 Replies


ADVERTISEMENT

C# - Binding Controls To Class Properties?

Mar 20, 2009

I have yet to find a "nice" way to do two way databinding in .Net. The one thing I don't like for example in the present asp.net two way databinding is doing the binding in the aspx page is no compile time checking, ie:

<asp:TextBox ID="TitleTextBox"
runat="server" Text='<%# Bind("Title_oops_spelled_wrong") %>'>

I would like to have something like this:

Class Binder
Public Sub BindControl(ctl As Control, objectProperty As ???????)
'// Add ctl and objectProperty to a collection
End Sub

What I don't know is possible is, how to receive the objectProperty in my example; I want to receive a reference (ie: a pointer) to the property, so later, via this reference, I can either read from or write to the property.

Can this somehow be done with delegates perhaps??

UPDATE: Note, I want to add the control reference to a binding collection, this collection would then be used for binding and unbinding.

View 3 Replies

Wpf - Property Notification When Binding To Class Not Properties?

Jun 13, 2011

I have a window that contains different functional areas of an account. The details, roles, type, contracts The window's DataContext is set to the 'AccountViewModel'. Inside the AccountViewModel, there are properties one of them being 'Account' which contains the details. I need for the user to be able to update these details. How can I notifiy the properties to call my Update() code when they are changed?

Here is what I have

<TextBox x:Name="txtAccountNumber" Grid.Row="0" Grid.Column="1" Text="{Binding Path=Account.AccountNumber, UpdateSourceTrigger=LostFocus}" />

[Code]...

View 1 Replies

WPF Binding Listview To A ObservableCollection?

May 3, 2011

I'm trying to figure out what I need to change to bind this code to a listview.

XAML:

<Window x:Class="MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

[code]....

what I need to do to change my XAML to Bind to my data.

View 2 Replies

Directly Binding A BitmapImage Created Inside A Class Bound To A ListBox In WPF?

Aug 31, 2011

I am adding object directly to a ListBox, and inside this class, I've got a BitmapImage object.I'm using an ItemTemplate :

<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>

[code].....

View 1 Replies

Asp.net - XML Axis Properties Do Not Support Late Binding

Jun 27, 2012

Im having a problem with the XML in this function and many functions like it.Error XML axis properties do not support late binding.

Namespace
Imports Microsoft.VisualBasic
Imports System.Web

[code]....

seems to be where the error is occurring and I'm not quite sure how to fix it.

View 1 Replies

Forms :: Object Binding - Properties Didn't Set The Value?

Mar 17, 2011

it's about object binding, yes it's just a simple binding. but i don't know why it won't work.for summary, i will write about what i am doing:

1. i have one solution, and have two project in it. WaitressDataWin and WaitressDataObject

2. inside WaitressDataWin, i have 'waitressdata.vb' . this is my simple form , there are some basic textbox (waitress name, address, phone)

3. inside WaitressDataObject, i have 'waitressDataObj.vb' is where i put my object class, i have WaitressName property, WaitressAddress, and Phone.one of my property is like this, others are same except the name of course.

Private _WaitressName As String
''' <summary>
''' Gets or sets the Waitress Name[code]....

4. i create data source , that is object data source. i add reference so i can add my second project which is WaitressDataObject and set the WaitressDataObj as the data source.now i have datasource with three properties (WaitressName, WaitressAddress, Phone)

5. I bind my textbox, by dragging the WaitressName (in datasource) to my waitressname textbox .. so on to all my properties.., i also get bindingsourcecomponent, WaitressDataObjectBindingSource

6. then I put this code to my form load :

dim wdm = new WaitressDataObj
Me.WaitressDataObjectBindingSource.DataSource = wdm

7. done, it should've been worked, but it didn't , i don't know why.. , every time i fill one of my textbox, the properties didn't set the value, i put breakpoint in the 'set' part of all my properties but it never breaks anyway.. (the 'get' part is good, it read my property value when i load the form). so i just had problem in my 'SET' Part.

8. I think i had checked on my variable (word, case sensitive,etc), no problem.

View 2 Replies

Hide / Omit Some Properties In Binding Of A Collection?

Mar 26, 2010

My problem is similar to the one described in this article, but I'm trying to use a different grid(DevExpress.xtraGrid) and therefore the answer (if it even works) does not apply for me: Binding Collection to DataGrid without showing all columns

Briefly, I'm binding the grid to the collection of custom objects - cMessage - to grid's datasource, but I don't want all the propertieties of the cMessage to be shown in the grid. Is there any way to hide some properties from the binding, while leaving them acessible from outside (ie.leave them as public or friend)?

View 1 Replies

Can't Inherit Shared Properties From A Base Class In A Child Class?

Dec 29, 2010

This is another one of my "I think it's not possible but I need confirmation" questions.I have a base class for a bunch of child classes. Right now, this base class has a few common properties the children use, like Name. The base is an abstract class (MustInherit)Technically, this means that everytime a child class is instantiated, it lugs around, in memory, its own copy of Name. The thing is, Name is going to be a fixed value for all instances of a given child. I.e., Child1.Name will return "child_object1", and Child2.Name will return "child_object2".

View 1 Replies

Inside The Service Class, Declare A Class Variable Named Started?

May 8, 2012

Create a class named Service. Inside the Service class, declare a class variable named Started. The datatype of this variable is Boolean.Public Class Service Dim started as Boolean End Class Create a class named Server. Inside the Server class, declare a dynamic array that can contain elements of the type Service.(Note: For convenience, both the array and the variable Started can be accessible from a client program that creates an instance of Server and Service respectively)

Create a constructor for the Service class. When the constructor is executed, it will set the value of the class variable Started to True. Create two new classes: WebServer and DatabaseEngine. Both of these classes inherit from the class Service. Inside the Service class, declare a Sub procedure (method) named Terminate. This method should display the following text Service stopping in a message box when executed.This method can be overridden in classes that inherit from Service class.

Inside both the WebServer and DatabaseEngine class, override the method Terminate inherited from their base class Service. Both methods should first call the base class Terminate method. The messages Web server stopping and Database engine stopping should also be displayed in a message box when the Terminate method for the WebServer and DatabaseEngine are called respectively. These messages should only be displayed if the Started variable inherited from their base class is not equal to False.

Inside the Server class, declare a method named Shutdown. This method does not return any value. When executed, it will call the Terminate method for each of the Service instances (if any) in the arrServices
array. You should call the Terminate method within a For Each loop that loops through the elements of the arrServices array.

In the Sub Main method, create an instance of the class Server. Set the size of the arrServices array in
your Server instance to contain 2 elements. Create first a WebServer instance and then a DatabaseEngine
instance into this array. Call the Shutdown method from your Server instance.

View 7 Replies

Get A Value Inside Parent Class From Child Class (in Nested Classes)?

Jan 1, 2012

I have Class1 and class2 which is inside class1, VB.NET code:

Public Class class1
Public varisbleX As Integer = 1
Public Class class2

[code]....

View 1 Replies

How To Assign A Different Reference To A Class Instance From Inside The Class Code

Jan 18, 2011

my proble is the following: I have a class MyClass and another class Modifier, which has a method ModifyMyClass(ByRef mc as MyClass) that receives a MyClass instance as ByRef parameter to modify it. A smell of the code is:

[Code]...

View 4 Replies

VS 2008 Reference Parent Class From Inside Child Class?

Apr 11, 2009

I 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 Replies

Class With Class Properties: AObject Reference Not Set To An Instance?

Aug 19, 2009

I have a class in which some of the fields are also classes.I can put values in the "normal" properties, but in the others when o try to assign values it gives the: "Object reference not set to an instance of an object"But the code compiles fine.

dados_Defenicao = New ServiceReference1.draftClaimEntryDefinition
dados_Defenicao.arCode = "123"
dados_Defenicao.claimMarket.warrantyType = "w" - Here it gives the error

How can i fix this ?

View 6 Replies

Class With Class Properties: Object Reference Not Set To An Instance

Aug 19, 2009

I have a class in which some of the fields are also classes.

I can put values in the "normal" properties, but in the others when o try to assign values it gives the: "Object reference not set to an instance of an object"

But the code compiles fine.

dados_Defenicao = New ServiceReference1.draftClaimEntryDefinition
dados_Defenicao.arCode = "123"
dados_Defenicao.claimMarket.warrantyType = "w" - Here it gives the error

View 4 Replies

Hide Or Omit Some Properties In Binding Of A Collection To Grid Control?

Mar 26, 2010

My problem is similar to the one described in this article, but I'm trying to use a different grid (DevExpress.xtraGrid) and therefore the answer (if it even works) does not apply for me: [URL]

Briefly, I'm binding the grid to the collection of custom objects - cMessage - to grid's datasource, but I don't want all the propertieties of the cMessage to be shown in the grid. Is there any way to hide some properties from the binding, while leaving them acessible from outside (ie.leave them as public or friend)?

View 2 Replies

Access The Base Class Inside A Derived Class?

Oct 22, 2010

How do I access the base class inside a derived class?

View 1 Replies

Handle An Event Raised In Class Inside Own Class?

Apr 14, 2009

I have a "partial" class in VB.NET. Half of it is auto generated by a code generation tool. That half implements INotifyPropertyChanged, so any properties in that part of the partial class raise the PropertyChanged event.In my "custom" part of the class, I declare another property that depends on one of the properties in the auto-generated side. Therefore, when that auto-generated property changes, I also want to raise a PropertyChanged event on my custom property that depends on it.

If I go into the generated part of the class and raise the event there, that will get overwritten if I ever re-generate that part, so I don't want to do that. I would rather add an event handler in my side of the partial class that checks if the generated property changed, and if so, raise another event for my custom property.

[Code]...

I'm assuming it's because normally you'd use the WithEvents keyword to tell the compiler that you're subscribing to events from that object. I don't have a clue how to do this inside of the class that's actually raising the event, or if that's even possible.

View 1 Replies

IDE :: Class Files. Same As Namespace Or The Same As The Class Object Inside?

May 22, 2009

If my namespace is Company.Application.EDI.Acknowledgement and if I stick with theprogramming practice of one class per file then should my class be saved asacknowledgement.vb? Are there any gotchas that will come up?

View 5 Replies

VS 2008 - Can Data Binding To Object Properties Be Setup During Design Time

Feb 17, 2010

Im doing my first project with WinForms, and Im trying to get the DataBinding working. Theres no database in my project, but I'd like to bind some of the TextBoxes to objects' properties. In the other section of this forum (here) I found this line of C# code which does it: textBox2.DataBindings.Add(new Binding("Text", this.myPerson, "LastName"));

my question is can data binding to object properties be set up during design time (without writing code)? If so, how? P.S. I know how I would set up this binding if in WPF, but I'm forced to use WinForms.

View 1 Replies

Make Class Array Inside Class

Feb 28, 2012

I am New to <acronym title="Visual Basic">Vb</acronym>.Net. this is my first test. i try to create small address book. but i don't know what wrong. it compile perfect but when it run it give error and not work. is there any other way to add same class like in class inside array?

[Code]...

View 6 Replies

VS 2010 Arrayed Class Inside A Class?

Nov 27, 2011

Haven't coded in a while, and ran into a wall when setting up my program data structure

So I have something like this in a class file;

Public Class X
Public Stuff as Integer
Public Stuff1 as String

[Code].....

I want to structure my program this way, what's the best way to go about that?

I want to access multiple data types in the same array from within a class, as it should be a subset of my base class etc... and want to be able to change the size of the array

Or is this class array within class nesting a dead end?

View 5 Replies

Altering Label Properties Inside Of A Function?

Oct 19, 2011

I'm trying to validate a form to be filled out by the users, and when the required section isn't filled, I increment an

ErrorCount += 1

variable to show that error(s) have occurred inside the program, I then also set an

ErrorArray()

to whatever the corresponding field number is, now I have 0-12 (13 fields). What I have also done is titled the labels that are associated with all of these fields to correspond with the ErrorArray() value that might be set, such as.

PatLabel0
PatLabel1 etc.

What I am trying to do is loop through the array contents, depending on which ErrorArray() values have been set, to go and set the corresponding fontcolor property of that label to red, to show that these now need to be filled out. This is what I have, but Visual Studio doesn't allow me to use the iteration through the loop as a reference to changing properties. Can anyone point me in the right direction to trying to figure this out, or at least tell me what else I could do. Just seems doing 20 if....then....else.... statements with 2 - 3 lines in each of them is redundant when 1 function line could do the same job. This is what I have.

for i = 0 to UBound(ErrorArray(12))
if(ErrorArray(i) = "*")then
PatLabel(i).forecolor = color.red

[code]....

that is basically all im looking for initially, but I can't do it.

View 1 Replies

Enum Inside Structure - Adding Properties?

May 19, 2009

I have an enum that I want to give some methods. I thought about changing the enum to a structure so I could add properties, but then the enum is a value inside the structure (not the structure itself), so this would affect comparisons and such. (For example, instead of writing
EnumVariable=EnumConstant,
Now it is
StructureVariable.EnumValue=EnumConstant).
At least, this is my understanding of it. It seems awkward to have to do this for such a simple scenario, so is it possible give enums properties, yet still have them treated as before? I've thought maybe I need to create a new valuetype from scratch, but I've never done that before.

View 7 Replies

C# - .NET: Getting A Class To Copy Properties Of One Class To Another?

Nov 10, 2010

I wrote a function that copies the properties of one class to another so make a copy of an object.So something like

MyObject myObject = myOtherObject.MyCustomCopy(myObject)
where myObject and myOtherObject are of the same type. I do it by bascually doing
myObject.prop1 = myOtherObject.prop1

[code]....

I am pretty sure in the past I used a .NET object that automaticaly did this, by reflection I guess, but can't remember it ... or an I imagining that such a method exists?

View 5 Replies

Asp.net - Structure A Class Inside A Class?

Jun 3, 2011

Currently, if I have different classes containing functions etc, I would structure them all in the 1 VB file titled whatever the main Class is. For example:

[Code]...

However, the problem with this is the file can become 1000s of lines long making hard to find portions of code. Is there a way I can store SubClass in a file such as MainClass.SubClass.vb so that its easier to locate classes? Or is there a better, more standard, way of doing this?

View 3 Replies

.net - WP7 Custom Class UI Binding?

Feb 4, 2011

I have a map with a MapItemsControl in my WP7 app that contains pushpins bound to items in a collection of custom classes. The pushpins are bound to properties of the item in the collection via a DataTemplate.When an item is added to or removed from the collection, all pins display correctly, with properties as per bindings, but when just an items' properties are modified, the UI does not update. The bindings just seem to get values from the source item upon loading, but I'd like them to keep the UI elements updated when the source collection items' properties are updated.To illustrate, I'll create a similar example:

Heres a custom class:

Public Class Box
Property CurrentColor As Color
Property Location As GeoCoordinate
End Class

[code]....

Whenever I add or remove items from TempBoxes, the pins all render as they should (e.g. if I specify a color in the collection item, the pin shows the color).Tapping on the item triggers the BoxTouched sub, which causes the item's color to change in the collection, but the UI doesn't change (pin color stays the same).To get the UI to update the color, I have to get it to render the pins again, by adding something like this to BoxTouched:

BoxControl.ItemsSource = Nothing
BoxControl.ItemsSource = TempBoxes

View 1 Replies

Wpf - Binding To Class Item

Sep 30, 2011

This seems like it should be really basic but I can't seemto get it working. I have a class file called XMLSource as follows:

[Code]...

View 1 Replies

C# - Binding Class Object To Listview In Wpf?

Apr 30, 2012

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 Replies

Customizing Binding Navigator Class

Apr 17, 2010

I am trying to customize the default binding navigator as i inherit it to my own class and add some buttons to it.every thing gos fine and great as i want it, but the problem is when i change any thing in the AddStandardItems() method class dos not reflect to the existing form which has the same class, i have to remove it from the form and put it again to reflect the changes.This is not good solution, i have more than 30 forms using the same Binding navigator class and it is not possible to remove it form all those forms and put it again.[code]

View 10 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved