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LINQ to Tree - A Generic Technique for Querying Tree-like Structures

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4 Mar 2010CPOL14 min read 358.6K   3.1K   234  
This article presents a generic approach to applying LINQ queries to tree like structures. Using T4 templates for code generation, LINQ to VisualTree (WPF), LINQ to WinForms, and LINQ to FileSystem APIs are constructed.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;

namespace LinqToWindowsForms
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            // find any buttons that are within GroupBoxes
            var buttons = this.Descendants<Button>()
                                .Where(i => i.Ancestors<GroupBox>().Any());

            // find all visible textboxes
            var textBox = this.Descendants<TextBox>()
                              .Cast<TextBox>()
                              .Where(t => t.Visible);
        }
    }
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Architect Scott Logic
United Kingdom United Kingdom
I am CTO at ShinobiControls, a team of iOS developers who are carefully crafting iOS charts, grids and controls for making your applications awesome.

I am a Technical Architect for Visiblox which have developed the world's fastest WPF / Silverlight and WP7 charts.

I am also a Technical Evangelist at Scott Logic, a provider of bespoke financial software and consultancy for the retail and investment banking, stockbroking, asset management and hedge fund communities.

Visit my blog - Colin Eberhardt's Adventures in .NET.

Follow me on Twitter - @ColinEberhardt

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