当 PictureBox 将父 ListView 和 ListView RightToLeft 设置为 true/yes 时，我在绘图时收到了一些伪影。
为什么会发生这种情况以及如何删除这些工件？
图片
http://i.stack.imgur.com/kx0zQ.png http://i.stack.imgur.com/E5il3.png
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
void DrawOnPictureBox(PictureBox pc)
{
int delta;
int.TryParse((string)comboBox1.SelectedItem, out delta);
pc.Width = 100;
pc.Height = 40;
if (pc.Image == null)
pc.Image = new Bitmap(pc.Width, pc.Height);
else
if (pc.Image.Width != pc.Width || pc.Image.Height != pc.Height)
pc.Image = new Bitmap(pc.Width, pc.Height);
Graphics gr = Graphics.FromImage(pc.Image);
gr.Clear(Color.White);
int paintWidth = pc.Width - 1;
int paintHeight = pc.Height - 1;
PointF[] points = new PointF[4];
points[0] = new PointF(delta, paintHeight - 1);
points[1] = new PointF(paintWidth - delta, paintHeight - 1);
points[2] = new PointF(paintWidth - delta, 0);
points[3] = new PointF(delta, 0);
//gr.DrawPolygon(new Pen(Color.Black), points);
/**/
gr.DrawLine(new Pen(Color.Black), points[0], points[1]);
gr.DrawLine(new Pen(Color.Black), points[1], points[2]);
gr.DrawLine(new Pen(Color.Black), points[2], points[3]);
gr.DrawLine(new Pen(Color.Black), points[3], points[0]);
/**/
gr.DrawString("1", this.Font, new SolidBrush(Color.Black), 10, 10);
}
private void button1_Click(object sender, EventArgs e)
{
pictureBox1.Parent = listView1;
DrawOnPictureBox(pictureBox1);
pictureBox2.Parent = listView2;
DrawOnPictureBox(pictureBox2);
pictureBox3.Parent = listView3;
DrawOnPictureBox(pictureBox3);
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
listView1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
listView1.RightToLeftLayout = true;
listView2.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
listView2.RightToLeftLayout = true;
listView3.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
listView3.RightToLeftLayout = true;
}
else
{
listView1.RightToLeft = System.Windows.Forms.RightToLeft.No;
listView1.RightToLeftLayout = false;
listView2.RightToLeft = System.Windows.Forms.RightToLeft.No;
listView2.RightToLeftLayout = false;
listView3.RightToLeft = System.Windows.Forms.RightToLeft.No;
listView3.RightToLeftLayout = false;
}
}
}
namespace WindowsFormsApplication2
{
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.button1 = new System.Windows.Forms.Button();
this.checkBox1 = new System.Windows.Forms.CheckBox();
this.listView1 = new System.Windows.Forms.ListView();
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.listView2 = new System.Windows.Forms.ListView();
this.pictureBox2 = new System.Windows.Forms.PictureBox();
this.listView3 = new System.Windows.Forms.ListView();
this.pictureBox3 = new System.Windows.Forms.PictureBox();
this.comboBox1 = new System.Windows.Forms.ComboBox();
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBox3)).BeginInit();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(357, 23);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 23);
this.button1.TabIndex = 1;
this.button1.Text = "button1";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// checkBox1
//
this.checkBox1.AutoSize = true;
this.checkBox1.Location = new System.Drawing.Point(481, 35);
this.checkBox1.Name = "checkBox1";
this.checkBox1.Size = new System.Drawing.Size(80, 17);
this.checkBox1.TabIndex = 2;
this.checkBox1.Text = "checkBox1";
this.checkBox1.UseVisualStyleBackColor = true;
this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);
//
// listView1
//
this.listView1.Location = new System.Drawing.Point(2, 263);
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(317, 364);
this.listView1.TabIndex = 3;
this.listView1.UseCompatibleStateImageBehavior = false;
//
// pictureBox1
//
this.pictureBox1.Location = new System.Drawing.Point(24, 280);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(130, 99);
this.pictureBox1.TabIndex = 0;
this.pictureBox1.TabStop = false;
//
// listView2
//
this.listView2.Location = new System.Drawing.Point(394, 55);
this.listView2.Name = "listView2";
this.listView2.Size = new System.Drawing.Size(538, 426);
this.listView2.TabIndex = 4;
this.listView2.UseCompatibleStateImageBehavior = false;
//
// pictureBox2
//
this.pictureBox2.Location = new System.Drawing.Point(407, 69);
this.pictureBox2.Name = "pictureBox2";
this.pictureBox2.Size = new System.Drawing.Size(130, 397);
this.pictureBox2.TabIndex = 5;
this.pictureBox2.TabStop = false;
//
// listView3
//
this.listView3.Location = new System.Drawing.Point(2, 3);
this.listView3.Name = "listView3";
this.listView3.Size = new System.Drawing.Size(183, 155);
this.listView3.TabIndex = 6;
this.listView3.UseCompatibleStateImageBehavior = false;
//
// pictureBox3
//
this.pictureBox3.Location = new System.Drawing.Point(2, 3);
this.pictureBox3.Name = "pictureBox3";
this.pictureBox3.Size = new System.Drawing.Size(183, 155);
this.pictureBox3.TabIndex = 7;
this.pictureBox3.TabStop = false;
//
// comboBox1
//
this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.comboBox1.FormattingEnabled = true;
this.comboBox1.Items.AddRange(new object[] {
"0",
"1",
"5",
"10"});
this.comboBox1.Location = new System.Drawing.Point(216, 55);
this.comboBox1.Name = "comboBox1";
this.comboBox1.Size = new System.Drawing.Size(120, 21);
this.comboBox1.TabIndex = 8;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(951, 627);
this.Controls.Add(this.comboBox1);
this.Controls.Add(this.pictureBox2);
this.Controls.Add(this.pictureBox1);
this.Controls.Add(this.pictureBox3);
this.Controls.Add(this.listView2);
this.Controls.Add(this.listView1);
this.Controls.Add(this.checkBox1);
this.Controls.Add(this.button1);
this.Controls.Add(this.listView3);
this.Name = "Form1";
this.Text = "Form1";
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBox3)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Button button1;
private System.Windows.Forms.CheckBox checkBox1;
private System.Windows.Forms.ListView listView1;
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.ListView listView2;
private System.Windows.Forms.PictureBox pictureBox2;
private System.Windows.Forms.ListView listView3;
private System.Windows.Forms.PictureBox pictureBox3;
private System.Windows.Forms.ComboBox comboBox1;
}
}