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BindingSource.BindingComplete Event

Note: This event is new in the .NET Framework version 2.0.

Occurs when all the clients have been bound to this BindingSource.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public event BindingCompleteEventHandler BindingComplete
/** @event */
public void add_BindingComplete (BindingCompleteEventHandler value)

/** @event */
public void remove_BindingComplete (BindingCompleteEventHandler value)

JScript supports the use of events, but not the declaration of new ones.

The BindingComplete event occurs after all the clients, typically controls, have been bound to the current BindingSource. The handler of this event can take the appropriate action based on the success, error, or exceptions in the binding process, by examining the BindingCompleteState property of the BindingCompleteEventArgs parameter.

For more information about handling events, see Consuming Events.

The following code example demonstrates handling the BindingComplete event. To run this code, paste it into an empty code file.

using System;
using System.Drawing;
using System.Windows.Forms;

class Form1 : Form
{
	private BindingSource BindingSource1 = new BindingSource();
	private TextBox textBox1 = new TextBox();
	private TextBox textBox2 = new TextBox();
	private TextBox textBox3 = new TextBox();

	public Form1()
	{
		//Set up the textbox controls.
		this.textBox1.Location = new System.Drawing.Point(82, 13);
		this.textBox1.TabIndex = 1;
		this.textBox2.Location = new System.Drawing.Point(81, 47);
		this.textBox2.TabIndex = 2;
		this.textBox3.Location = new System.Drawing.Point(81, 83);
		this.textBox3.TabIndex = 3;

		// Add the textbox controls to the form
		this.Controls.Add(this.textBox2);
		this.Controls.Add(this.textBox1);
		this.Controls.Add(this.textBox3);

		// Handle the form's Load event.
		this.Load += new System.EventHandler(this.Form1_Load);
	}
	Binding partNameBinding;
	Binding partNumberBinding;

	private void Form1_Load(object sender, EventArgs e)
	{
		// Set the DataSource of BindingSource1 to the Part type.
		BindingSource1.DataSource = typeof(Part);

		// Bind the textboxes to the properties of the Part type, 
		// enabling formatting.
		partNameBinding = textBox1.DataBindings.Add("Text",
			BindingSource1, "PartName", true);
		
		partNumberBinding = textBox2.DataBindings.Add("Text", BindingSource1, "PartNumber",
			true);

		//Bind the textbox to the PartPrice value with currency formatting.
		textBox3.DataBindings.Add("Text", BindingSource1, "PartPrice", true,
			DataSourceUpdateMode.OnPropertyChanged, 0, "C");
			

		// Handle the BindingComplete event for BindingSource1 and 
		// the partNameBinding.
		partNumberBinding.BindingComplete +=
			new BindingCompleteEventHandler(partNumberBinding_BindingComplete);
		partNameBinding.BindingComplete +=
			new BindingCompleteEventHandler(partNameBinding_BindingComplete);

		// Add a new part to BindingSource1.
		BindingSource1.Add(new Part("Widget", 1234, 12.45));
	}

	// Handle the BindingComplete event to catch errors and exceptions 
	// in binding process.
	void partNumberBinding_BindingComplete(object sender,
		BindingCompleteEventArgs e)
	{
		if (e.BindingCompleteState != BindingCompleteState.Success)
			MessageBox.Show("partNumberBinding: " + e.ErrorText);
	}		

	// Handle the BindingComplete event to catch errors and 
	// exceptions in binding process.
	void partNameBinding_BindingComplete(object sender,
		BindingCompleteEventArgs e)
	{
		if (e.BindingCompleteState != BindingCompleteState.Success)
			MessageBox.Show("partNameBinding: " + e.ErrorText);
	}

	[STAThread]
	static void Main()
	{
		Application.EnableVisualStyles();
		Application.Run(new Form1());
	}
}

// Represents a business object that throws exceptions when invalid values are
// entered for some of its properties.
public class Part
{
	private string name;
	private int number;
	private double price;

	public Part(string name, int number, double price)
	{
		PartName = name;
		PartNumber = number;
		PartPrice = price;
	}

	public string PartName
	{
		get { return name; }
		set
		{
			if (value.Length <= 0)
				throw new Exception("Each part must have a name.");
			else
				name = value;
		}
	}
	public double PartPrice
	{
		get { return price; }
		set { price = value; }
	}

	public int PartNumber
	{
		get { return number; }
		set
		{
			if (value < 100)
				throw new Exception("Invalid part number." +
					" Part numbers must be greater than 100.");
			else
				number = value;
		}
	}
}

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

.NET Compact Framework

Supported in: 2.0

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