DisplayMemberTemplateSelector.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Framework / MS / Internal / Data / DisplayMemberTemplateSelector.cs / 1 / DisplayMemberTemplateSelector.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: Defines DisplayMemberTemplateSelector class. 
// 
//---------------------------------------------------------------------------
 
using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Controls; 
using System.Windows.Data;
using MS.Internal; 
 
namespace MS.Internal.Data
{ 
    // Selects template appropriate for CLR/XML item in order to
    // display string property at DisplayMemberPath on the item.
    internal sealed class DisplayMemberTemplateSelector : DataTemplateSelector
    { 
        /// 
        /// Constructor 
        ///  
        /// path to the member to display
        public DisplayMemberTemplateSelector(string displayMemberPath, string stringFormat) 
        {
            Debug.Assert(!(String.IsNullOrEmpty(displayMemberPath) && String.IsNullOrEmpty(stringFormat)));
            _displayMemberPath = displayMemberPath;
            _stringFormat = stringFormat; 
        }
 
        ///  
        /// Override this method to return an app specific .
        ///  
        /// The data content
        /// The container in which the content is to be displayed
        /// a app specific template to apply.
        public override DataTemplate SelectTemplate(object item, DependencyObject container) 
        {
            if (XmlHelper.IsXmlNode(item)) 
            { 
                if (_xmlNodeContentTemplate == null)
                { 
                    _xmlNodeContentTemplate = new DataTemplate();
                    FrameworkElementFactory text = ContentPresenter.CreateTextBlockFactory();
                    Binding binding = new Binding();
                    binding.XPath = _displayMemberPath; 
                    binding.StringFormat = _stringFormat;
                    text.SetBinding(TextBlock.TextProperty, binding); 
                    _xmlNodeContentTemplate.VisualTree = text; 
                    _xmlNodeContentTemplate.Seal();
                } 
                return _xmlNodeContentTemplate;
            }
            else
            { 
                if (_clrNodeContentTemplate == null)
                { 
                    _clrNodeContentTemplate = new DataTemplate(); 
                    FrameworkElementFactory text = ContentPresenter.CreateTextBlockFactory();
                    Binding binding = new Binding(); 
                    binding.Path = new PropertyPath(_displayMemberPath);
                    binding.StringFormat = _stringFormat;
                    text.SetBinding(TextBlock.TextProperty, binding);
                    _clrNodeContentTemplate.VisualTree = text; 
                    _clrNodeContentTemplate.Seal();
                } 
                return _clrNodeContentTemplate; 
            }
        } 

        private string _displayMemberPath;
        private string _stringFormat;
        private DataTemplate _xmlNodeContentTemplate; 
        private DataTemplate _clrNodeContentTemplate;
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: Defines DisplayMemberTemplateSelector class. 
// 
//---------------------------------------------------------------------------
 
using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Controls; 
using System.Windows.Data;
using MS.Internal; 
 
namespace MS.Internal.Data
{ 
    // Selects template appropriate for CLR/XML item in order to
    // display string property at DisplayMemberPath on the item.
    internal sealed class DisplayMemberTemplateSelector : DataTemplateSelector
    { 
        /// 
        /// Constructor 
        ///  
        /// path to the member to display
        public DisplayMemberTemplateSelector(string displayMemberPath, string stringFormat) 
        {
            Debug.Assert(!(String.IsNullOrEmpty(displayMemberPath) && String.IsNullOrEmpty(stringFormat)));
            _displayMemberPath = displayMemberPath;
            _stringFormat = stringFormat; 
        }
 
        ///  
        /// Override this method to return an app specific .
        ///  
        /// The data content
        /// The container in which the content is to be displayed
        /// a app specific template to apply.
        public override DataTemplate SelectTemplate(object item, DependencyObject container) 
        {
            if (XmlHelper.IsXmlNode(item)) 
            { 
                if (_xmlNodeContentTemplate == null)
                { 
                    _xmlNodeContentTemplate = new DataTemplate();
                    FrameworkElementFactory text = ContentPresenter.CreateTextBlockFactory();
                    Binding binding = new Binding();
                    binding.XPath = _displayMemberPath; 
                    binding.StringFormat = _stringFormat;
                    text.SetBinding(TextBlock.TextProperty, binding); 
                    _xmlNodeContentTemplate.VisualTree = text; 
                    _xmlNodeContentTemplate.Seal();
                } 
                return _xmlNodeContentTemplate;
            }
            else
            { 
                if (_clrNodeContentTemplate == null)
                { 
                    _clrNodeContentTemplate = new DataTemplate(); 
                    FrameworkElementFactory text = ContentPresenter.CreateTextBlockFactory();
                    Binding binding = new Binding(); 
                    binding.Path = new PropertyPath(_displayMemberPath);
                    binding.StringFormat = _stringFormat;
                    text.SetBinding(TextBlock.TextProperty, binding);
                    _clrNodeContentTemplate.VisualTree = text; 
                    _clrNodeContentTemplate.Seal();
                } 
                return _clrNodeContentTemplate; 
            }
        } 

        private string _displayMemberPath;
        private string _stringFormat;
        private DataTemplate _xmlNodeContentTemplate; 
        private DataTemplate _clrNodeContentTemplate;
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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