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Form1.cs
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Form1.cs
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using System;
using System.ComponentModel;
using System.Windows.Forms;
namespace DataBindingTest
{
public class Form1 : Form
{
private readonly BindingSource _bs = new BindingSource() { DataSource = typeof(Outer) };
private Outer _dummy;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
textBox1 .DataBindings.Add(new Binding("Text" , _bs, "Comment" , false, DataSourceUpdateMode.OnPropertyChanged));
dataGridView1 .DataBindings.Add(new Binding("DataSource" , _bs, "Innards" , false, DataSourceUpdateMode.Never));
button1 .DataBindings.Add(new Binding("Enabled" , _bs, "Dirty" , false, DataSourceUpdateMode.Never));
}
private void Form1_Shown(object sender, EventArgs e)
{
_dummy = new Outer("hello world");
_bs.DataSource = _dummy;
}
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.dataGridView1 = new System.Windows.Forms.DataGridView();
((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
this.SuspendLayout();
//
// button1
//
this.button1.Enabled = false;
this.button1.Location = new System.Drawing.Point(12, 12);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(120, 23);
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.UseVisualStyleBackColor = true;
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(12, 41);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(120, 20);
this.textBox1.TabIndex = 1;
//
// dataGridView1
//
this.dataGridView1.AllowUserToAddRows = false;
this.dataGridView1.AllowUserToDeleteRows = false;
this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dataGridView1.Location = new System.Drawing.Point(12, 67);
this.dataGridView1.Name = "dataGridView1";
this.dataGridView1.Size = new System.Drawing.Size(240, 220);
this.dataGridView1.TabIndex = 2;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(800, 450);
this.Controls.Add(this.dataGridView1);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.Shown += new System.EventHandler(this.Form1_Shown);
((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private Button button1;
private TextBox textBox1;
private DataGridView dataGridView1;
}
public class Outer
{
public event PropertyChangedEventHandler PropertyChanged;
private bool _dirty;
private string _comment;
public Outer(string comment)
{
_comment = comment;
for (int i = 0; i < 5; i++)
{
Inner inner = new Inner();
inner.PropertyChanged += ChildPropertyChanged;
Innards.Add(inner);
}
}
private void ChildPropertyChanged(object sender, PropertyChangedEventArgs e)
{
Dirty = true;
}
public string Comment
{
get { return _comment; }
set
{
if(value != _comment)
{
_comment = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Comment"));
Dirty = true;
}
}
}
public bool Dirty
{
get { return _dirty; }
set
{
if(value != _dirty)
{
_dirty = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Dirty"));
System.Diagnostics.Debug.WriteLine($"outer -- Dirty: {_dirty}");
System.Diagnostics.Debug.WriteLine($"outer PropertyChanged: {PropertyChanged}");
}
}
}
public BindingList<Inner> Innards { get; } = new BindingList<Inner>();
}
public class Inner
{
public event PropertyChangedEventHandler PropertyChanged;
private bool _dirty;
private bool _isExcluded;
public bool IsExcluded
{
get { return _isExcluded; }
set
{
if(value != _isExcluded)
{
_isExcluded = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("IsExcluded"));
Dirty = true;
}
}
}
public bool Dirty
{
get { return _dirty; }
set
{
if(value != _dirty)
{
_dirty = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Dirty"));
System.Diagnostics.Debug.WriteLine($"inner -- Dirty: {_dirty}");
System.Diagnostics.Debug.WriteLine($"inner PropertyChanged: {PropertyChanged}");
}
}
}
}
}