FlowLayoutPanel and anchoring child controls - ahh!

[sklett]

I've read several articles/blogs/threads about anchoring/docking child
controls in a FlowLayoutPanel. It sounds like it *should* work, but I can't
get it to work for the life of me.

Jon Skeet: I've created a short and complete sample to illustrate the
problem. Beat you to it! :0)

I would really appreciate if anyone could take a look at this and tell me
what the magic trick is to make this work. All I want is to have the child
panels anchor to the left/right edges of the LayoutPanel. Shouldn't be
hard.

<code>
// Form1.cs
//

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

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

// Form1.Designer.cs
//

namespace FlowLayoutTest
{
partial class Form1
{
/// <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.flowLayoutPanel1 = new
System.Windows.Forms.FlowLayoutPanel();
this.panel1 = new System.Windows.Forms.Panel();
this.panel2 = new System.Windows.Forms.Panel();
this.panel3 = new System.Windows.Forms.Panel();
this.flowLayoutPanel1.SuspendLayout();
this.SuspendLayout();
//
// flowLayoutPanel1
//
this.flowLayoutPanel1.Anchor =
((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top
| System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.flowLayoutPanel1.Controls.Add(this.panel1);
this.flowLayoutPanel1.Controls.Add(this.panel2);
this.flowLayoutPanel1.Controls.Add(this.panel3);
this.flowLayoutPanel1.FlowDirection =
System.Windows.Forms.FlowDirection.TopDown;
this.flowLayoutPanel1.Location = new System.Drawing.Point(12,
12);
this.flowLayoutPanel1.Name = "flowLayoutPanel1";
this.flowLayoutPanel1.Size = new System.Drawing.Size(836, 455);
this.flowLayoutPanel1.TabIndex = 0;
//
// panel1
//
this.panel1.Anchor =
((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left
| System.Windows.Forms.AnchorStyles.Right)));
this.panel1.BackColor = System.Drawing.Color.Red;
this.panel1.Location = new System.Drawing.Point(3, 3);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(688, 100);
this.panel1.TabIndex = 0;
//
// panel2
//
this.panel2.BackColor = System.Drawing.Color.Blue;
this.panel2.Location = new System.Drawing.Point(3, 109);
this.panel2.Name = "panel2";
this.panel2.Size = new System.Drawing.Size(688, 100);
this.panel2.TabIndex = 1;
//
// panel3
//
this.panel3.BackColor = System.Drawing.Color.Lime;
this.panel3.Location = new System.Drawing.Point(3, 215);
this.panel3.Name = "panel3";
this.panel3.Size = new System.Drawing.Size(688, 100);
this.panel3.TabIndex = 2;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(860, 479);
this.Controls.Add(this.flowLayoutPanel1);
this.Name = "Form1";
this.Text = "Form1";
this.flowLayoutPanel1.ResumeLayout(false);
this.ResumeLayout(false);

}

#endregion

private System.Windows.Forms.FlowLayoutPanel flowLayoutPanel1;
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.Panel panel2;
private System.Windows.Forms.Panel panel3;
}
}

</code>

Thanks for reading,
Steve

 

[sklett]

Wow, this is a record for me answering my own question!

Single line of code "fixes" the problem. (which I would consider a bug, but
MS thinks is not)
(
https://connect.microsoft.com/Visua...Feedback.aspx?FeedbackID=112563&wa=wsignin1.0 )

<code>
panel1.Width = flowLayoutPanel1.Width;
</code>

Sorry for the long original post.
-Steve