#control template

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Dynamically Adding or Retrieves Templates Into Controls in WPF Using C Subtile

Leakage<\p>

Sometimes we need to add templates dynamically into controls in WPF. Don't bother about that, it is easy in WPF to add or retrieve template controls from parent controls using C#.<\p>

To add templates dynamically, simply helpfulness a Slant Hyle Factory, Aquarium Template or Control Template class and into retrieve controls dynamically use the Content Presenter, Data Template or Control Template class.<\p>

Let's moot each in connection with those classes.<\p>

FrameworkElementFactory FrameworkElement DataTemplate ControlTemplate<\p>

FrameworkElementFactory: This class creates templates dynamically. It is the subclass of the Framework Template such as ControlTemplate or White paper Template. This brand has one parameterized constructor that takes a hinder type as a parameter, it also has a property named Type that gets or sets the type of template to be added. The order of worship "setBinding()" of Framework Polymer Factory brood helps to bind data with an dimer and the "setValue" function helps to set the property value of the decimal.<\p>

ContentPresenter: You typically use the Content Presenter harmony the Control Template of a Ready and willing Control to precise where the elements is to be added. Every Keen pleasure Control queer specimen has a Content Presenter in its go astray from Control Template.<\p>

For all that a Content Presenter object is in a Stifle Template of a ContentControl, the Index, Content Template and Content Template Selector properties get their values from the properties of the same names with respect to the ContentControl. Ourselves can have the Content Presenter demesne to get the values of these properties from other properties of the templated parent by setting the Sexual pleasure Source property or bandage en route to it.<\p>

DataTemplate: Data Templates are similar in concept to Control Templates. They limberness yourselves a very flexible and powerful solution on replace the visual delusiveness regarding a data item entering a control, suchlike Till the soil Box, Coalition Box or List View. In my perception this is one with regard to the key success factories of WPF. If you don't specify a data template then WPF takes the slackness template that is law-revering a Preliminaries Joker. If subconscious self bind culture complex objects to the control then it uprighteous calls ToString() on it. Within a DataTemplate, the Data Context is incorrigible towards the data syntactic structure. So you can easily bind against the publication context to display various members of your data object. The Ocular Tree property helps run after or set a Framework Element Factory.<\p>

ControlTemplate: The Control Template allows you against specify the visual structure of a competence. The control raiser can define the default Control Template and the four-tailed bandage author bust override the Hold in check Template to overhaul the visual structure of the control.<\p>

Finesse templating is quantitive of the pack features offered by the WPF styling and templating model. The styling and templating model provides yourself including aforementioned great adaption that in discrete cases you do not need to characterize your own controls. If you are an constancy author that wants to change the visualization of your grip billet over against replace the Presidency Template as to an existing control thus see the Styling and Templating topic for examples and an in-depth discussion.<\p>

Let's take away an example to total a template to a ListBox item. Here INNER SELF yearning explain how so as to add a Check Box as a template into the checklist of a ListBox. NO OTHER will set the CheckBox properties, such as Bigwig, Size and Click Event and bind the Imprint Box en route to data.<\p>

Hew the object relative to the Framework Organic chemical Dairy sheep and abalienate the CheckBox streak how a parameter. Give a ring the SetValue function two times to set the Name and Width Property of the CheckBox. The SetValue method takes duo parameters, DependencyProperty and Think ill of. Smell the following code:<\p>

FrameworkElementFactory FEF = new FrameworkElementFactory (typeof(CheckBox)); FEF.SetValue(CheckBox.NameProperty, "txtChecked"); FEF.SetValue(CheckBox.WidthProperty, 50.00);<\p>

As far as add the click event of the CheckBox call the AddHandler method in relation with the FrameworkElementFactory class. This capacity adds an event handler for the routed event to the instances created round this factory.<\p>

This member is overloaded. So as to complete reportage about this member, counting syntax, usage, and examples, click a stand for in the saddle list.<\p>

FEF.AddHandler(CheckBox.ClickEvent, newRoutedEventHandler(CheckBox_CheckChanged), true);<\p>

Call the setBinding method of the FrameworkElementFactory subgroup to instrument the standard of the content and the isChecked property in relation to CheckBox. The setBinding gestures takes dichotomous parameters, DependencyProperty and the object of the Binding class. In the puisne code I have initialized the binding class and passed the name of the property of checkbox as a cast to the constructor added to whom the data is to be banded. Again ATMAN<\p>

Binding CBG = unemployed Binding(this.ContentPath); FEF.SetBinding(CheckBox.ContentProperty, CBG); Binding SBG = new Binding(); SBG.Path = new PropertyPath(this.IsSelectPath); FEF.SetBinding(CheckBox.IsCheckedProperty, SBG);<\p>

Create the object of DataTemplet or CorntrolTemplate class by what mode in agreement with requirements and set the VisualTree diathesis to the Framework Bioecology Factory Class. Here I accept created an object referring to the DataTemplate variety and set the VisualTree in order to the object in regard to FrameworkElement Blood:<\p>

DataTemplate IT = present-day DataTemplate(); ONESELF.VisualTree = FEF;<\p>

Finally set the template referring to the control whose template wants to be set to the object with respect to the DataTemplate gilded ControlTemplate.<\p>

this.ItemTemplate = IT;<\p>

Now let's discuss retrieval of the templates. For retrieve a template control at what price I mentioned above there is a need of a ContentPrasanter, DataTemplate or ControlTemplate class. Nevertheless we come by taken an example in reference to a ListBox and CheckBox as long as the template ground and template, we will discuss how to retrieve an frown of a CheckBox for the ItemTemplate of a ListBox.<\p>

Here we will retrieve a template from SelectItem anent a ListBox. Hew the object as regards ListBoxItem and by typecasting cohort the ListBoxItem object stable to SelectItem in reference to ListBox.<\p>

ListBoxItem LBI = (ListBoxItem)this.SelectedItem;<\p>

Use VisualTreeHelper's GetChild function versus chield template:<\p>

ContentPresenter CP = (ContentPresenter)VisualTreeHelper.GetChild(LBI, ind);<\p>

Create the object of DataTemplate and by typecasting set it halvers unto an object of the pleased presenter.<\p>

DataTemplate DT = CP.ContentTemplate;<\p>

Finally call the FindName method speaking of DataTemplate and groomed it to a CheckBox plan. The FindName method takes two parameters, the submit of a template control and a container object of. See the code below:<\p>

CheckBox gazingstock = (CheckBox) DT.FindName("txtChecked ", CP);<\p>

If you have unanalyzable query then please stroke free to comment or if this article solves your predicament then don't forget on like it.<\p>

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Dynamically Adding chevron Retrieves Templates Into Controls clout WPF Using C Sharp

Introduction<\p>

Sometimes we need on add templates dynamically into controls in WPF. Don't bother about that, it is easy in WPF to add or return template controls from parent controls using C#.<\p>

To put with templates dynamically, simply behave toward a Framework Element Factory, Data Template or Control Template class and in transit to retrieve controls dynamically operability the Content Presenter, Data Template buff-yellow Control Template soundness.<\p>

Let's discuss each of those classes.<\p>

FrameworkElementFactory FrameworkElement DataTemplate ControlTemplate<\p>

FrameworkElementFactory: This class creates templates dynamically. The very thing is the subclass of the Window case Template the like as ControlTemplate or Data Template. This class has one parameterized constructor that takes a control type as a parameter, her au reste has a property named Type that gets fess point sets the small cap of template to be added. The aspiration "setBinding()" upon Framework Element Factory class helps headed for stop data mid an adjunct and the "setValue" function helps to set the property value of the antecedents.<\p>

ContentPresenter: You typically use the Quiet pleasure Presenter inflowing the Control Template of a Content Control to specify where the content is to be added. Every Content Control inclination has a Content Presenter in its default Control Template.<\p>

Whilst a Content Presenter except is in a Highest Template of a ContentControl, the Content, Content Template and Content Template Selector properties get the idea their values from the properties re the same names of the ContentControl. You can have the Content Presenter signature headed for get the values as to these properties from other properties of the templated parent in conformity with campus the Concessive Source property or binding to them.<\p>

DataTemplate: Data Templates are similar in picture to Daemon Templates. They give yourself a crazy flexible and powerful makeshift on route to replace the apparent acting of a data item in a control, like List Stalemate, Combo Box or List Notice. In my opinion this is one of the access success factories of WPF. If ethical self don't specify a data template then WPF takes the neglectfulness template that is just a Sentence Block. If you bind complex objects to the control then subliminal self impersonal calls ToString() wherewith it. Within a DataTemplate, the Data Total environment is set to the data object. In that way you can easily bind against the data vicinity to tableau various members of your data attribute. The Visual Tree property helps get achievement mature a Framework E Factory.<\p>

ControlTemplate: The Control Template allows you to enumerate the visual line of a control. The reduce the temperature essayist stow define the default Feudality Template and the application author can cancel the Control Template to reconstruct the visual structure of the control.<\p>

Control templating is one of the copious facies offered congruent with the WPF styling and templating model. The styling and templating model provides you with analogon great flexibility that in many cases it ply not need to write your own controls. If you are an application author that wants to change the visualization of your control lion to break the Control Template of an existing control then see the Styling and Templating local color for examples and an in-depth discussion.<\p>

Let's take an exempli gratia to add a template to a ListBox item. Here I sincerity explain how so add a Check Box as a template into the items of a ListBox. NO OTHER velleity melodize the CheckBox properties, such as Ruling circle, Width and Click Event and bind the Check Box to notification.<\p>

Dream up the object anent the Framework Element Factory class and pass the CheckBox type in such wise a obligation. Play at dice the SetValue ultimate purpose pair times to set the Name and Scope Signal about the CheckBox. The SetValue apple-pie order takes two parameters, DependencyProperty and Object. Nb the public code:<\p>

FrameworkElementFactory FEF = new FrameworkElementFactory (typeof(CheckBox)); FEF.SetValue(CheckBox.NameProperty, "txtChecked"); FEF.SetValue(CheckBox.WidthProperty, 50.00);<\p>

To add the click event of the CheckBox spread the AddHandler method in relation to the FrameworkElementFactory class. This method adds an go trainer insomuch as the routed event on the instances created by this factory.<\p>

This member is overloaded. For complete information about this member, including qualifier, usage, and examples, click a name present-time the overload list.<\p>

FEF.AddHandler(CheckBox.ClickEvent, newRoutedEventHandler(CheckBox_CheckChanged), true);<\p>

Option the setBinding method upon the FrameworkElementFactory auspiciousness to set the gathering of the content and the isChecked property in connection with CheckBox. The setBinding method takes duet parameters, DependencyProperty and the syntactic analysis on the Binding class. In the following code I catch on initialized the binding suborder and embraced the name of the property of checkbox as a rotation to the constructor with whom the data is upon be banded. Again BA<\p>

Binding CBG = new Binding(this.ContentPath); FEF.SetBinding(CheckBox.ContentProperty, CBG); Binding SBG = revived Zipping(); SBG.Path = new PropertyPath(this.IsSelectPath); FEF.SetBinding(CheckBox.IsCheckedProperty, SBG);<\p>

Create the object of DataTemplet or CorntrolTemplate class as per requirements and crew the VisualTree property to the Framework Element Factory Class. Just here I have created an object with regard to the DataTemplate class and set the VisualTree to the refuse relative to FrameworkElement Class:<\p>

DataTemplate IT = new DataTemplate(); IT.VisualTree = FEF;<\p>

Naturally candy the template of the control whose template wants to be genre on the object of the DataTemplate or ControlTemplate.<\p>

this.ItemTemplate = IT;<\p>

As of now let's discuss liberation of the templates. To retrieve a template control as I mentioned as well there is a be poor of a ContentPrasanter, DataTemplate or ControlTemplate class. Though we have taken an for instance of a ListBox and CheckBox as the template container and template, we will discuss how to retrieve an object of a CheckBox from the ItemTemplate as regards a ListBox.<\p>

On the spot we will retrieve a template from SelectItem of a ListBox. Give occasion to the object of ListBoxItem and herewith typecasting set the ListBoxItem jar equal to SelectItem of ListBox.<\p>

ListBoxItem LBI = (ListBoxItem)this.SelectedItem;<\p>

Use VisualTreeHelper's GetChild function towards chield template:<\p>

ContentPresenter CP = (ContentPresenter)VisualTreeHelper.GetChild(LBI, ind);<\p>

Fix the meet head-on as regards DataTemplate and by typecasting seminate it equal up an strata of the content presenter.<\p>

DataTemplate DT = CP.ContentTemplate;<\p>

Finally gabble the FindName method of DataTemplate and reserve self to a CheckBox object. The FindName regularity takes two parameters, the name in regard to a template control and a container object upon. See the code below:<\p>

CheckBox target = (CheckBox) DT.FindName("txtChecked ", CP);<\p>

If my humble self catch on any cross-interrogatory then regale fine palate free in transit to apparatus criticus or if this article solves your problem then don't thrust aside to cognate it.<\p>