In a GirdView the text of some columns sould be aligned to the right.
To do that I create a DataTemplate, which contains a TextBlock.
Binding bd = new Binding("path");
FrameworkElementFactory tbContent = new FrameworkElementFactory(typeof(TextBlock));
tbContent.SetBinding(TextBlock.TextProperty, bd);
tbContent.SetValue(TextBlock.TextAlignmentProperty, TextAlignment.Right);
DataTemplate dataTemplate = new DataTemplate();
dataTemplate.VisualTree = tbContent;
myGridViewColumn.CellTemplate = dataTemplate;
In an other class I have to access the Bindings of my GridViewColumns. How can I access the Binding of this column?
I had the same issue, so I exposed the TextAlignmentProperty as a public property.
Related
I have a border generated dynamically.
I want to bind thickness property of it, with my style model.
Border db = new Border();
Binding borderthickness = new Binding();
borderthickness.Source = this.imodel.GridStyleProperties.BorderThickness;
borderthickness.Path = new PropertyPath("BorderThickness");
BindingOperations.SetBinding(db, Border.BorderThicknessProperty, borderthickness);
This is what I have done so far. Its not working for me.
Please suggest me what is wrong with this code.
Thank you
You are binding to a BorderThickness object, with Path set to BorderThickness. That means the binding will look in this.imodel.GridStyleProperties.BorderThickness.BorderThickness which doesn't exist.
Try
borderthickness.Source = this.imodel.GridStyleProperties;
borderthickness.Path = new PropertyPath("BorderThickness");
or just
borderthickness.Source = this.imodel.GridStyleProperties.BorderThickness;
I loaded the datatemplate for image column in code behind . Please refer the below code snippet,
FrameworkElementFactory fef = new FrameworkElementFactory(typeof(Image));
Binding bind = new Binding() { Path=new PropertyPath(imagecolumn.MappingName),Converter = new StringToImageConverter(),Mode=BindingMode.TwoWay };
fef.SetBinding(Image.SourceProperty,new Binding(imagecolumn.MappingName));
DataTemplate template = new DataTemplate() { VisualTree = fef };
this.imagecolumn.CellItemTemplate = template;
But my converter is not invoked. I need to load different images in each row of the column . Am i missed anything ? Please share any idea
You instantiate a new Binding but you never use it. Do this:
FrameworkElementFactory fef = new FrameworkElementFactory(typeof(Image));
Binding bind = new Binding() { Path=new PropertyPath("MappingName"),Converter = new StringToImageConverter(),Mode=BindingMode.TwoWay,Source=imagecolumn };
fef.SetBinding(Image.SourceProperty, bind); // here you just created
//another instance of Binding instead of using your bind variable
DataTemplate template = new DataTemplate() { VisualTree = fef };
this.imagecolumn.CellItemTemplate = template;
EDIT:
Have a look at FrameworkElementFactory. In the remarks it sais:
This class is a deprecated way to programmatically create templates, which are subclasses of FrameworkTemplate such as ControlTemplate or DataTemplate; not all of the template functionality is available when you create a template using this class. The recommended way to programmatically create a template is to load XAML from a string or a memory stream using the Load method of the XamlReader class.
Maybe you should do it the recommended way.
I'm trying to create a custom control which inherits from a TextBox control. in the constructor of my custom control I need to have the text property bound. this the code I'm using by now.
var binding = new Binding("Name");
binding.Mode = BindingMode.TwoWay;
binding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
binding.ValidatesOnDataErrors = true;
SetValue(TextProperty, binding);
I haven't set a source for binding because I want it be the DataContext of the form on which my custom control will be placed however I suppose I'm doing it in a wrong way because when I added on the form I face the error message in xaml which says: "System.Windows.Data.Binding is not a valid value for property text.
Its not good to do in code-behind, hope this answers your question
Binding binding = new Binding();
binding.Path = new PropertyPath("yourPropertyTobeBinded");
binding.Source = sourceObject;
BindingOperations.SetBinding(youTextBox, TextBox.TextProperty, binding);
Here is the combobox in my UserControl:
<Combobox ItemsSource="{Binding ComboItemsProperty}" />
I have tried:
Binding bind = new Binding();
bind.Mode = BindingMode.OneWay;
bind.Source = this;
bind.Path = new PropertyPath("ComboItemsProperty");
this.SetBinding(ComboBox.ItemsSourceProperty, bind);
However, this doesn't work. I think I am doing the bind.Source wrong, but I'm not sure what to set the Source to. This code is inside my UserControl.xaml.cs.
You can try (Replace this)
Binding bind = new Binding();
bind.Mode = BindingMode.OneWay;
bind.Source = yourCollectionSourceOrClass; //<--Replace with your collection
bind.Path = new PropertyPath("ComboItemsProperty");
this.SetBinding(ComboBox.ItemsSourceProperty, bind);
You need to the set context of the instance containing your property ComboItemsProperty. So instead of 'this' u should set it to 'this.DataContext' or other class object instance containing the ItemSource property you have defined..
Try this,
Binding bind = new Binding();
bind.Mode = BindingMode.OneWay;
bind.Source = this.DataContext;
bind.Path = new PropertyPath("ComboItemsProperty");
this.SetBinding( ComboBox. ItemsSource Property, bind);
(posting frm mobile)
I have tried a lot of ways to do this, however, nothing seems to work.
I am instead going to serialize the binding when the .xaml file gets saved out. This seems to be working perfectly. Binding will no longer have to be set in code.
I am trying to build a dropdown list for a winform interop, and I am creating the dropdown in code. However, I have a problem getting the data to bind based on the DataTemplate I specify.
What am I missing?
drpCreditCardNumberWpf = new ComboBox();
DataTemplate cardLayout = new DataTemplate {DataType = typeof (CreditCardPayment)};
StackPanel sp = new StackPanel
{
Orientation = System.Windows.Controls.Orientation.Vertical
};
TextBlock cardHolder = new TextBlock {ToolTip = "Card Holder Name"};
cardHolder.SetBinding(TextBlock.TextProperty, "BillToName");
sp.Children.Add(cardHolder);
TextBlock cardNumber = new TextBlock {ToolTip = "Credit Card Number"};
cardNumber.SetBinding(TextBlock.TextProperty, "SafeNumber");
sp.Children.Add(cardNumber);
TextBlock notes = new TextBlock {ToolTip = "Notes"};
notes.SetBinding(TextBlock.TextProperty, "Notes");
sp.Children.Add(notes);
cardLayout.Resources.Add(sp, null);
drpCreditCardNumberWpf.ItemTemplate = cardLayout;
Assuming that you've already set up the ItemsSource etc for drpCreditCardNumberWpf...
//create the data template
DataTemplate cardLayout = new DataTemplate();
cardLayout.DataType = typeof(CreditCardPayment);
//set up the stack panel
FrameworkElementFactory spFactory = new FrameworkElementFactory(typeof(StackPanel));
spFactory.Name = "myComboFactory";
spFactory.SetValue(StackPanel.OrientationProperty, Orientation.Horizontal);
//set up the card holder textblock
FrameworkElementFactory cardHolder = new FrameworkElementFactory(typeof(TextBlock));
cardHolder.SetBinding(TextBlock.TextProperty, new Binding("BillToName"));
cardHolder.SetValue(TextBlock.ToolTipProperty, "Card Holder Name");
spFactory.AppendChild(cardHolder);
//set up the card number textblock
FrameworkElementFactory cardNumber = new FrameworkElementFactory(typeof(TextBlock));
cardNumber.SetBinding(TextBlock.TextProperty, new Binding("SafeNumber"));
cardNumber.SetValue(TextBlock.ToolTipProperty, "Credit Card Number");
spFactory.AppendChild(cardNumber);
//set up the notes textblock
FrameworkElementFactory notes = new FrameworkElementFactory(typeof(TextBlock));
notes.SetBinding(TextBlock.TextProperty, new Binding("Notes"));
notes.SetValue(TextBlock.ToolTipProperty, "Notes");
spFactory.AppendChild(notes);
//set the visual tree of the data template
cardLayout.VisualTree = spFactory;
//set the item template to be our shiny new data template
drpCreditCardNumberWpf.ItemTemplate = cardLayout;
You can use the same way I have set the ToolTip on the TextBlocks to set other properties such as margins.
The full version
var ms = new MemoryStream(Encoding.UTF8.GetBytes(#"<DataTemplate xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""
xmlns:c=""clr-namespace:MyApp.Converters;assembly=MyApp"">
<DataTemplate.Resources>
<c:MyConverter x:Key=""MyConverter""/>
</DataTemplate.Resources>
<TextBlock Text=""{Binding ., Converter={StaticResource MyConverter}}""/>
</DataTemplate>"));
var template = (DataTemplate)XamlReader.Load(ms);
var cb = new ComboBox { };
//Set the data template
cb.ItemTemplate = template;
Well, indeed we still have another way, you will really like it if you dislike those FrameworkElementFactory things.
And I think it just makes minor changes to the natural code, that is, declare a UserControl and put your control into it, and then, use just one FrameworkElementFactory to call the UserControl.
Simple demo code (in F#):
let buildView()=StackPanel()
//Build it with natural code
type MyView()=inherit UserControl(Content=buildView())
let factory=FrameworkElementFactory(typeof<MyView>)
let template=DataTemplate(VisualTree=factory)
let list=ItemsControl(ItemsSource=makeData(),ItemTemplate=template)