I am currently trying to make a slider in ViewA change the font size of text in viewA and viewB. I have everything bound correctly, but the delegate command is not calling the execute method when the font size property is changed. If I manually call this function everything works as expected, so it is likely one line of code that is the problem. The ViewAViewModel is below:
public class ViewAViewModel : BindableBase
{
private Person _CoolChick = new Person();
private int _fontSize = 12;
private IEventAggregator _eventAggregator;
public DelegateCommand UpdateSizeCommand { get; set; }
public Person CoolChick
{
get
{
return _CoolChick;
}
set
{
SetProperty(ref _CoolChick, value);
}
}
public int FontSize
{
get { return _fontSize; }
set {
Console.WriteLine(_fontSize + " => Font Size");
SetProperty(ref _fontSize, value);
//Execute();
}
}
public ViewAViewModel(IEventAggregator eventAggregator)
{
CoolChick.Age = 25;
CoolChick.Name = "Methalous";
_eventAggregator = eventAggregator;
//likely the problem in this code
UpdateSizeCommand = new DelegateCommand(Execute, CanExecute).ObservesProperty(() => FontSize);
}
private void Execute()
{
_eventAggregator.GetEvent<UpdateEvent>().Publish(FontSize);
}
private bool CanExecute()
{
return true;
}
}
Why would it? You're not calling UpdateSizeCommand.Execute in the setter of your Font property. The command will not invoke unless you bind it to a command property or invoke it manually.
Related
thank you for helping.
First, I created a form with a (user defined) property.
as see below
public partial class nfrmtableitem : Form
{
private DataRow _datarow;
public DataRow U_Table_Row { get { return _datarow; } set { _datarow = value; } }
public nfrmtableitem()
{
InitializeComponent();
}
}
And I create second form with property as type of Form.
as see below
public partial class nftableshow : Form
{
private DataTable _datatable;
public DataTable U_DataTable { get { return _datatable; } set { _datatable = value; } }
private Form _inputform1;
public Form U_DGV_InputForm1 { get { return _inputform1; } set { _inputform1 = value; } }
}
when call it:
any where
nftableshow newfrmtableshow = new nftableshow()
{
Name = "newfrmtableshow",
Text = "Show the table",
MdiParent = this,
U_DGV_InputForm1 = new nfrmtableitem(),
};
newfrmtableshow.Show();
But I can not use the first form property in second form.
and the property is not in instance.
//the button in second form
private void button1_Click_Click(object sender, EventArgs e)
{
Form f1 = _inputform1 as Form;
/*
* {
* U_Table_Row = db.maindataset.Tables["customer"].NewRow(),
* };
*/
f1.Show();
}
Question:
How can I use the First form with specific (user defined) property in second form.
Regards
You should probably use dot notation to access the property of the first form. Try using
//the button in second form
private void button1_Click_Click(object sender, EventArgs e)
{
Form f1 = _inputform1 as Form;
{
f1.U_Table_Row = db.maindataset.Tables["customer"].NewRow(),
};
f1.Show();
}
The intial problem was that when I called a webservice ( asmx) methos with a type the type was always going through as null . Inspecting the Soap confirmed that the type was going as an empty element. So I tried a simple test.
Here is my type which of course has been generated from WSDL
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Xml", "4.0.30319.233")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(Namespace="http://dto12.api.echosign")]
public partial class SendDocumentInteractiveOptions {
private bool authoringRequestedField;
private bool authoringRequestedFieldSpecified;
private bool autoLoginUserField;
private bool autoLoginUserFieldSpecified;
private bool noChromeField;
private bool noChromeFieldSpecified;
/// <remarks/>
public bool authoringRequested {
get {
return this.authoringRequestedField;
}
set {
this.authoringRequestedField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlIgnoreAttribute()]
public bool authoringRequestedSpecified {
get {
return this.authoringRequestedFieldSpecified;
}
set {
this.authoringRequestedFieldSpecified = value;
}
}
/// <remarks/>
public bool autoLoginUser {
get {
return this.autoLoginUserField;
}
set {
this.autoLoginUserField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlIgnoreAttribute()]
public bool autoLoginUserSpecified {
get {
return this.autoLoginUserFieldSpecified;
}
set {
this.autoLoginUserFieldSpecified = value;
}
}
/// <remarks/>
public bool noChrome {
get {
return this.noChromeField;
}
set {
this.noChromeField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlIgnoreAttribute()]
public bool noChromeSpecified {
get {
return this.noChromeFieldSpecified;
}
set {
this.noChromeFieldSpecified = value;
}
}
}
Now here is some simple code to serialize it.
SendDocumentInteractiveOptions sdio = new SendDocumentInteractiveOptions();
sdio.authoringRequested = true;
sdio.autoLoginUser = true;
sdio.noChrome = true;
XmlSerializer xmlSer = new XmlSerializer(typeof(SendDocumentInteractiveOptions));
XmlWriter xw = new XmlTextWriter(#"g:\test.xml", null);
xmlSer.Serialize(xw, sdio);
xw.Close();
And here is the resulting XML
<?xml version="1.0"?>
<SendDocumentInteractiveOptions xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
So what am I missing here. Why are my public properties not getting serialized?
This is kind of an old question, but oh well. I think the solution might be in another question "Why isn't my public property serialized by the XmlSerializer?". Part of the answer lists reasons why an attribute would not be serialized and in that list is
it has a public bool FooSpecified {get;set;} property that returned false
In your code, you set the various Boolean values but set the related specified values. I was facing a similar issue and setting the specified value fixed it for me.
I have created custom component for displaying text with either Simple or Password mode, intention to develop this control is the Silverlight does not support custom TextMode (like Password or Text).
This is my requirement
In addition to the access rights it will be possible for organizations to specify restricted access to certain fields in the database. The access restriction to these fields will be Update and Redacted, thus meaning if a specific field has true against Update then a user will be able to update the field as well as viewing it, and if the field has true against Redacted then the user will only be able to see a redacted value in the filed (possibly asterisks - * * * * *). It will be possible to set a field to being Update-able and Redacted, thus meaning a user will see the redacted view but still be able to go and update the field with a new value. Such a requirement is mostly used when holding sensitive information against a contact or information which could be used to discriminate against the contact.
I have created custom control for this requirement and it is working perfectly. i am able to set TextMode dynamically but i couldn't able to get the original value in my ViewModel. (I am able to get original value in View but can't in ViewModel)
If i am access the original value in View using following then it is work.
string s = UserName.Text;
but not getting this value in ViewModel it is giving me like **.
Following is the complete code for PasswordTextBox control.
namespace QSys.Library.Controls
{
public partial class PasswordTextBox : TextBox
{
#region Variables
private string text = string.Empty;
private string passwordChar = "*";
private int selectionLength = 0;
#endregion
#region Properties
/// <summary>
/// The text associated with the control.
/// </summary>
public new string Text
{
get { return text; }
set
{
text = value;
DisplayMaskedCharacters();
}
}
/// <summary>
/// Indicates the character to display for password input.
/// </summary>
public string PasswordChar
{
get { return passwordChar; }
set { passwordChar = value; }
}
/// <summary>
/// Indicates the input text mode to display for either text or password.
/// </summary>
public Mode TextMode
{
get { return (Mode)GetValue(TextModeProperty); }
set { SetValue(TextModeProperty, value); }
}
public static readonly DependencyProperty TextModeProperty = DependencyProperty.Register("TextMode", typeof(Mode), typeof(PasswordTextBox), new PropertyMetadata(default(Mode)));
#endregion
#region Constructors
public PasswordTextBox()
{
this.Loaded += new RoutedEventHandler(PasswordTextBox_Loaded);
}
#endregion
#region Event Handlers
void PasswordTextBox_Loaded(object sender, System.Windows.RoutedEventArgs e)
{
if (this.TextMode == Mode.Password)
{
text = base.Text;
this.TextChanged += new TextChangedEventHandler(PasswordTextBox_TextChanged);
this.KeyDown += new KeyEventHandler(PasswordTextBox_KeyDown);
this.SelectionChanged += new RoutedEventHandler(PasswordTextBox_SelectionChanged);
DisplayMaskedCharacters();
}
this.Loaded -= PasswordTextBox_Loaded;
}
void PasswordTextBox_SelectionChanged(object sender, RoutedEventArgs e)
{
selectionLength = this.SelectionLength;
}
public void PasswordTextBox_TextChanged(object sender, TextChangedEventArgs e)
{
if (base.Text.Length >= text.Length)
text += base.Text.Substring(text.Length);
else
{
int cursorPosition = this.SelectionStart;
selectionLength = (selectionLength > 1) ? selectionLength : 1;
text = text.Remove(cursorPosition, selectionLength);
}
DisplayMaskedCharacters();
selectionLength = 0;
}
public void PasswordTextBox_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{
int cursorPosition = this.SelectionStart;
// Handle Delete and Backspace Keys Appropriately
if (e.Key == System.Windows.Input.Key.Back && cursorPosition > 0)
{
DeleteAt(cursorPosition);
}
else if (e.Key == System.Windows.Input.Key.Delete)
{
DeleteAt(cursorPosition);
}
else
{
if (selectionLength > 0) text = text.Remove(cursorPosition, selectionLength);
base.Text = text;
this.Select((cursorPosition > text.Length ? text.Length : cursorPosition), 0);
DisplayMaskedCharacters();
}
selectionLength = 0;
}
#endregion
#region Private Methods
private void DisplayMaskedCharacters()
{
int cursorPosition = this.SelectionStart;
// This changes the Text property of the base TextBox class to display all Asterisks in the control
base.Text = new string(passwordChar.ToCharArray()[0], text.Length);
this.Select((cursorPosition > text.Length ? text.Length : cursorPosition), 0);
}
private void DeleteAt(int position)
{
if (text.Length > position)
{
text = text.Remove(position, 1);
base.Text = base.Text.Remove(position, 1);
}
}
#endregion
}
}
LoginView.xaml
<control:PasswordTextBox x:Name="UserName" TabIndex="1" Grid.Row="1" TextMode="Password" Text="{Binding Path=LoginModelValue.UserName, Mode=TwoWay,ValidatesOnNotifyDataErrors=True, ValidatesOnExceptions=True, ValidatesOnDataErrors=True, NotifyOnValidationError=True}" HorizontalAlignment="Left" VerticalAlignment="Top" Grid.Column="1" Width="200" Height="25" Validatevalue:UpdateSourceTriggerHelper.UpdateSourceTrigger="True"/>
LoginViewModel.cs
public class LoginViewModel : INotifyPropertyChanged, IRegionMemberLifetime
{
public LoginModel LoginModelValue
{
get { return _LoginModelValue; }
set
{
_LoginModelValue = value;
OnPropertyChanged("LoginModelValue");
}
}
}
LoginModel.cs
namespace QSys.Model
{
public class LoginModel : INotifyPropertyChanged
{
#region Variables
private string _userName;
private string _password;
#endregion
#region Constructor
public LoginModel()
{
}
#endregion
#region Properties
[CustomValidation(typeof(PasswordTextBox), "IsValidUserName")]
[Required(ErrorMessage = "User Name is required")]
[Display(Name = "UserName")]
[StringLength(50)]
//[RegularExpression(#"^[a-zA-Z\\0-9\\.\\,\\'\s]+$", ErrorMessage = "Please enter right format.")]
public string UserName
{
get { return _userName; }
set
{
_userName = value;
OnPropertyChanged("UserName");
ValidateProperty("UserName", value);
}
}
[Required(ErrorMessage = "Password is required")]
[Display(Name = "Password")]
[StringLength(10)]
public string Password
{
get { return _password; }
set
{
_password = value;
OnPropertyChanged("Password");
ValidateProperty("Password", value);
}
}
#endregion
#region INotifyPropertyChanged
public event PropertyChangedEventHandler PropertyChanged = delegate { };
private void OnPropertyChanged(string propertyName)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
#endregion
#region Private Methods
public bool IsValidObject()
{
ICollection<ValidationResult> results = new Collection<ValidationResult>();
return Validator.TryValidateObject(this, new ValidationContext(this, null, null), results, true) && results.Count == 0;
}
public void ValidateProperty(string propertyName, object value)
{
Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = propertyName });
}
#endregion
}
}
**I am looking for solution since two days without any luck.
Please help me if you have any solution, your comments or suggestion would be highly appreciated.**
Thanks
Imdadhusen
Wouldn't it be easier to build your own UserControl around the regular TextBox and PasswordBox and just switching their visibility when your dependency property TextMode changes? You could then have a single VM for the UserControl with property Value and bind in TwoWay mode both the TextProperty of the TextBox and the Password property of the PasswordBox to it.
I have resolved using following code.
I am missing Mode=TwoWay in LoginView.xaml:
<control:RestrictedBox Type="Text" Value="{Binding Path=UserName,Mode=TwoWay}">
Thanks,
Imdadhusen
I have created custom Textbox in Silverlight 4, MVVM and PRISM 4. The custom text box has dynamic behavior link it dynamically set TextMode to either Password or Text.
This is working perfect. ( if i am bind TextMode static)
<control:PasswordTextBox x:Name="customTextBox2" Width="100" Height="30" Grid.Row="4" Grid.Column="1" Text="{Binding Email}" TextMode="Password"/>
This is giving me an error (if i am binding with dynamic)
<control:PasswordTextBox x:Name="customTextBox1" Width="100" Height="30" Grid.Row="4" Grid.Column="1" Text="{Binding Email}" TextMode="{Binding WritingMode}"/>
following is my ViewModel code
[Export]
[PartCreationPolicy(CreationPolicy.NonShared)]
public class UserRightsViewModel : NotificationObject, IRegionMemberLifetime
{
private Mode _writingMode = Mode.Text;
public Mode WritingMode
{
get { return _writingMode; }
set
{
_writingMode = value; RaisePropertyChanged("WritingMode");
}
}
[ImportingConstructor]
public UserRightsViewModel(IEventAggregator eventAggregator, IRegionManager regionManager)
{
UserSecurity security = new UserSecurity();
FormSecurity formSecurity = security.GetSecurityList("Admin");
formSecurity.WritingMode = Mode.Password;
}
}
following is the enum
namespace QSys.Library.Enums
{
public enum Mode
{
Text,
Password
}
}
following code for Custom PasswordTextBox
namespace QSys.Library.Controls
{
public partial class PasswordTextBox : TextBox
{
#region Variables
private string _Text = string.Empty;
private string _PasswordChar = "*";
private Mode _TextMode = Mode.Text;
#endregion
#region Properties
/// <summary>
/// The text associated with the control.
/// </summary>
public new string Text
{
get { return _Text; }
set
{
_Text = value;
DisplayMaskedCharacters();
}
}
/// <summary>
/// Indicates the character to display for password input.
/// </summary>
public string PasswordChar
{
get { return _PasswordChar; }
set { _PasswordChar = value; }
}
/// <summary>
/// Indicates the input text mode to display for either text or password.
/// </summary>
public Mode TextMode
{
get { return _TextMode; }
set { _TextMode = value; }
}
#endregion
#region Constructors
public PasswordTextBox()
{
this.TextChanged += new TextChangedEventHandler(PasswordTextBox_TextChanged);
this.KeyDown += new System.Windows.Input.KeyEventHandler(PasswordTextBox_KeyDown);
this.Loaded += new RoutedEventHandler(PasswordTextBox_Loaded);
}
#endregion
#region Event Handlers
void PasswordTextBox_Loaded(object sender, System.Windows.RoutedEventArgs e)
{
//this.TextChanged += ImmediateTextBox_TextChanged;
}
public void PasswordTextBox_TextChanged(object sender, TextChangedEventArgs e)
{
if (base.Text.Length >= _Text.Length) _Text += base.Text.Substring(_Text.Length);
DisplayMaskedCharacters();
}
public void PasswordTextBox_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{
int cursorPosition = this.SelectionStart;
int selectionLength = this.SelectionLength;
// Handle Delete and Backspace Keys Appropriately
if (e.Key == System.Windows.Input.Key.Back || e.Key == System.Windows.Input.Key.Delete)
{
if (cursorPosition < _Text.Length)
_Text = _Text.Remove(cursorPosition, (selectionLength > 0 ? selectionLength : 1));
}
base.Text = _Text;
this.Select((cursorPosition > _Text.Length ? _Text.Length : cursorPosition), 0);
DisplayMaskedCharacters();
}
#endregion
#region Private Methods
private void DisplayMaskedCharacters()
{
int cursorPosition = this.SelectionStart;
// This changes the Text property of the base TextBox class to display all Asterisks in the control
base.Text = new string(_PasswordChar.ToCharArray()[0], _Text.Length);
this.Select((cursorPosition > _Text.Length ? _Text.Length : cursorPosition), 0);
}
#endregion
#region Public Methods
#endregion
}
}
I am getting following error if i am binding with dynamically.
Set property 'QSys.Library.Controls.PasswordTextBox.TextMode' threw an exception. [Line: 40 Position: 144]
Your answer would be appreciated.
Thanks in advance.
Imdadhusen
Try to change in your PasswordTextBox class
public Mode TextMode
{
get { return _TextMode; }
set { _TextMode = value; }
}
to
public static readonly DependencyProperty TextModeProperty =
DependencyProperty.Register("TextMode", typeof(Mode), typeof(PasswordTextBox), new PropertyMetadata(default(Mode)));
public Mode TextMode
{
get { return (Mode) GetValue(TextModeProperty); }
set { SetValue(TextModeProperty, value); }
}
You can read more here:
Dependency Properties Overview
DependencyProperty Class
The main paragraph from the second link is:
A DependencyProperty supports the following capabilities in Windows
Presentation Foundation (WPF):
....
The property can be set through data binding. For more information about data binding dependency properties, see How to: Bind the
Properties of Two Controls.
I provide links for WPF, but basically for Silverlight it's the same
has someone been able to correctly to update a cell browser at runtime, i.e. when u remove a node or add a node, the change is reflected immediately in the CEll Browser, because I am using a List and when i am making a change it is not being updated on the spot
You can use ListDataProvider setList(...) method for dynamic updates. Here is an example how I update cell browser via RPC:
private void loadAllData(final ListDataProvider<Data> dataProvider) {
dBservice.getAllData(new AsyncCallback<List<Data>>() {
public void onSuccess(List<Data> result) {
dataProvider.setList(result);
}
public void onFailure(Throwable caught) {
caught.printStackTrace();
}
});
}
to refresh a cellBrowser you have to close all the child on the root node.
anyway something like this
for (int i = 0; i < cellBrowser.getRootTreeNode().getChildCount(); i++) {
cellBrowser.getRootTreeNode().setChildOpen(i, false);
}
the AsyncDataProvider calls refreshes data
private final class Model implements TreeViewModel{
private List<ZonaProxy> zonaList = null;
private List<CategoriaProxy> categoriaList = null;
public void setCategoriaList(List<CategoriaProxy> categoriaList) {
this.categoriaList = categoriaList;
}
public void setListZona(List<ZonaProxy> zonaList) {
this.zonaList = zonaList;
}
#SuppressWarnings({ "unchecked", "rawtypes" })
public <T> NodeInfo<?> getNodeInfo(T value) {
CategoryDataProvider dataProvider1 = new CategoryDataProvider();
return new DefaultNodeInfo(dataProvider1, new CategoriaCell());
}
/**
* Check if the specified value represents a leaf node. Leaf nodes cannot be
* opened.
*/
public boolean isLeaf(Object value) {
if (value instanceof CategoriaProxy){
if (((CategoriaProxy) value).getLivello() == 3) {
return true;
}
}
return false;
}
}
private class CategoryDataProvider extends AsyncDataProvider<CategoriaProxy>
{
#Override
protected void onRangeChanged(HasData<CategoriaProxy> display)
{
requests.categoriaRequest().findAllCategorias(0, 8).with().fire(new Receiver<List<CategoriaProxy>>() {
#Override
public void onSuccess(List<CategoriaProxy> values) {
updateRowCount(values.size(), true);
updateRowData(0, values);
}
});
}
}
it Works.
Apparently it is not enough to change the data provider and refresh it.
You need also to force the affected cell to close and reopen it, as in this example
public void updateCellBrowser(String id) {
TreeNode node = getNode(cellBrowser.getRootTreeNode(),id);
if(node != null && ! node.isDestroyed()) {
TreeNode parent = node.getParent();
int index = node.getIndex();
parent.setChildOpen(index, false,true);
parent.setChildOpen(index, true, true);
}
}
In my particular example the cell ids are pathnames hence the following
implementation of getNode().
private TreeNode getNode(TreeNode node, String id) {
for(int i=0; i < node.getChildCount(); i++)
if(node.isChildOpen(i)) {
Object value = node.getChildValue(i);
if(value instanceof String) {
String nodeId = ((String) value);
if(id.equals(nodeId))
return node.setChildOpen(i, true);
if(id.startsWith(nodeId))
getNode(node.setChildOpen(i, true),id);
}
}
return null;
}