前提
入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。
GitHub：https://github.com/kwwwvagaa/NetWinformControl
码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
如果觉得写的还行，请点个 star 支持一下吧
欢迎前来交流探讨： 企鹅群568015492 
NuGet
Install-Package HZH_Controls
目录
https://www.cnblogs.com/bfyx/p/11364884.html
用处及效果
准备工作
这个是基于（四十一）c#Winform自定义控件-进度条 扩展的，如果你还没有了解，请先移步了解一下
开始
添加一个用户控件，命名UCProcessLineExt
属性
1 [Description("值变更事件"), Category("自定义")] 2 public event EventHandler ValueChanged; 3 4 [Description("当前属性"), Category("自定义")] 5 public int Value 6 { 7 set 8 { 9 ucProcessLine1.Value = value; 10 Refresh(); 11 } 12 get 13 { 14 return ucProcessLine1.Value; 15 } 16 } 17 18 19 20 [Description("最大值"), Category("自定义")] 21 public int MaxValue 22 { 23 get { return ucProcessLine1.MaxValue; } 24 set 25 { 26 ucProcessLine1.MaxValue = value; 27 Refresh(); 28 } 29 } 30 31 32 [Description("值进度条颜色"), Category("自定义")] 33 public Color ValueColor 34 { 35 get { return ucProcessLine1.ValueColor; } 36 set 37 { 38 ucProcessLine1.ValueColor = value; 39 Refresh(); 40 } 41 } 42 43 44 [Description("值背景色"), Category("自定义")] 45 public Color ValueBGColor 46 { 47 get { return ucProcessLine1.ValueBGColor; } 48 set 49 { 50 ucProcessLine1.ValueBGColor = value; 51 Refresh(); 52 } 53 } 54 55 56 [Description("边框颜色"), Category("自定义")] 57 public Color BorderColor 58 { 59 get { return ucProcessLine1.BorderColor; } 60 set 61 { 62 ucProcessLine1.BorderColor = value; 63 Refresh(); 64 } 65 } 66 67 [Description("值字体"), Category("自定义")] 68 public override Font Font 69 { 70 get 71 { 72 return ucProcessLine1.Font; 73 } 74 set 75 { 76 ucProcessLine1.Font = value; 77 Refresh(); 78 } 79 } 80 81 [Description("值块颜色"), Category("自定义")] 82 public override System.Drawing.Color ForeColor 83 { 84 get 85 { 86 return base.ForeColor; 87 } 88 set 89 { 90 base.ForeColor = value; 91 Refresh(); 92 } 93 } 重绘
1 protected override void OnPaint(PaintEventArgs e) 2 { 3 base.OnPaint(e); 4 e.Graphics.SetGDIHigh(); 5 float fltIndex = (float)this.ucProcessLine1.Value / (float)this.ucProcessLine1.MaxValue; 6 7 int x = (int)(fltIndex * this.ucProcessLine1.Width + this.ucProcessLine1.Location.X - 15) - 2; 8 GraphicsPath path = new GraphicsPath(); 9 Rectangle rect = new Rectangle(x, 1, 30, 20); 10 int cornerRadius = 2; 11 path.AddArc(rect.X, rect.Y, cornerRadius * 2, cornerRadius * 2, 180, 90); 12 path.AddLine(rect.X + cornerRadius, rect.Y, rect.Right - cornerRadius * 2, rect.Y); 13 path.AddArc(rect.X + rect.Width - cornerRadius * 2, rect.Y, cornerRadius * 2, cornerRadius * 2, 270, 90); 14 path.AddLine(rect.Right, rect.Y + cornerRadius * 2, rect.Right, rect.Y + rect.Height - cornerRadius * 2); 15 path.AddArc(rect.X + rect.Width - cornerRadius * 2, rect.Y + rect.Height - cornerRadius * 2, cornerRadius * 2, cornerRadius * 2, 0, 90); 16 path.AddLine(rect.Right - cornerRadius * 2, rect.Bottom, rect.Right - cornerRadius * 2 - 5, rect.Bottom);//下 17 path.AddLine(rect.Right - cornerRadius * 2 - 5, 21, x + 15, ucProcessLine1.Location.Y); 18 path.AddLine(x + 15, ucProcessLine1.Location.Y, rect.X + cornerRadius * 2 + 5, 21); 19 path.AddLine(rect.X + cornerRadius * 2 + 5, 20, rect.X + cornerRadius * 2, rect.Bottom);//下 20 path.AddArc(rect.X, rect.Bottom - cornerRadius * 2, cornerRadius * 2, cornerRadius * 2, 90, 90); 21 path.AddLine(rect.X, rect.Bottom - cornerRadius * 2, rect.X, rect.Y + cornerRadius * 2);//上 22 path.CloseFigure(); 23 24 e.Graphics.FillPath(new SolidBrush(ForeColor), path); 25 26 string strValue = ((float)Value / (float)MaxValue).ToString("0%"); 27 System.Drawing.SizeF sizeF = e.Graphics.MeasureString(strValue, Font); 28 e.Graphics.DrawString(strValue, Font, new SolidBrush(Color.White), new PointF(x + (30 - sizeF.Width) / 2+1, (20 - sizeF.Height) / 2 + 1)); 29 } 全部代码
1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Drawing; 5 using System.Data; 6 using System.Linq; 7 using System.Text; 8 using System.Windows.Forms; 9 using System.Drawing.Drawing2D; 10 11 namespace HZH_Controls.Controls 12 { 13 public partial class UCProcessLineExt : UserControl 14 { 15 [Description("值变更事件"), Category("自定义")] 16 public event EventHandler ValueChanged; 17 18 [Description("当前属性"), Category("自定义")] 19 public int Value 20 { 21 set 22 { 23 ucProcessLine1.Value = value; 24 Refresh(); 25 } 26 get 27 { 28 return ucProcessLine1.Value; 29 } 30 } 31 32 33 34 [Description("最大值"), Category("自定义")] 35 public int MaxValue 36 { 37 get { return ucProcessLine1.MaxValue; } 38 set 39 { 40 ucProcessLine1.MaxValue = value; 41 Refresh(); 42 } 43 } 44 45 46 [Description("值进度条颜色"), Category("自定义")] 47 public Color ValueColor 48 { 49 get { return ucProcessLine1.ValueColor; } 50 set 51 { 52 ucProcessLine1.ValueColor = value; 53 Refresh(); 54 } 55 } 56 57 58 [Description("值背景色"), Category("自定义")] 59 public Color ValueBGColor 60 { 61 get { return ucProcessLine1.ValueBGColor; } 62 set 63 { 64 ucProcessLine1.ValueBGColor = value; 65 Refresh(); 66 } 67 } 68 69 70 [Description("边框颜色"), Category("自定义")] 71 public Color BorderColor 72 { 73 get { return ucProcessLine1.BorderColor; } 74 set 75 { 76 ucProcessLine1.BorderColor = value; 77 Refresh(); 78 } 79 } 80 81 [Description("值字体"), Category("自定义")] 82 public override Font Font 83 { 84 get 85 { 86 return ucProcessLine1.Font; 87 } 88 set 89 { 90 ucProcessLine1.Font = value; 91 Refresh(); 92 } 93 } 94 95 [Description("值块颜色"), Category("自定义")] 96 public override System.Drawing.Color ForeColor 97 { 98 get 99 { 100 return base.ForeColor; 101 } 102 set 103 { 104 base.ForeColor = value; 105 Refresh(); 106 } 107 } 108 109 public UCProcessLineExt() 110 { 111 InitializeComponent(); 112 this.SetStyle(ControlStyles.AllPaintingInWmPaint, true); 113 this.SetStyle(ControlStyles.DoubleBuffer, true); 114 this.SetStyle(ControlStyles.ResizeRedraw, true); 115 this.SetStyle(ControlStyles.Selectable, true); 116 this.SetStyle(ControlStyles.SupportsTransparentBackColor, true); 117 this.SetStyle(ControlStyles.UserPaint, true); 118 ucProcessLine1.ValueChanged += ucProcessLine1_ValueChanged; 119 } 120 121 void ucProcessLine1_ValueChanged(object sender, EventArgs e) 122 { 123 if (ValueChanged != null) 124 { 125 ValueChanged(this, e); 126 } 127 } 128 129 protected override void OnPaint(PaintEventArgs e) 130 { 131 base.OnPaint(e); 132 e.Graphics.SetGDIHigh(); 133 float fltIndex = (float)this.ucProcessLine1.Value / (float)this.ucProcessLine1.MaxValue; 134 135 int x = (int)(fltIndex * this.ucProcessLine1.Width + this.ucProcessLine1.Location.X - 15) - 2; 136 GraphicsPath path = new GraphicsPath(); 137 Rectangle rect = new Rectangle(x, 1, 30, 20); 138 int cornerRadius = 2; 139 path.AddArc(rect.X, rect.Y, cornerRadius * 2, cornerRadius * 2, 180, 90); 140 path.AddLine(rect.X + cornerRadius, rect.Y, rect.Right - cornerRadius * 2, rect.Y); 141 path.AddArc(rect.X + rect.Width - cornerRadius * 2, rect.Y, cornerRadius * 2, cornerRadius * 2, 270, 90); 142 path.AddLine(rect.Right, rect.Y + cornerRadius * 2, rect.Right, rect.Y + rect.Height - cornerRadius * 2); 143 path.AddArc(rect.X + rect.Width - cornerRadius * 2, rect.Y + rect.Height - cornerRadius * 2, cornerRadius * 2, cornerRadius * 2, 0, 90); 144 path.AddLine(rect.Right - cornerRadius * 2, rect.Bottom, rect.Right - cornerRadius * 2 - 5, rect.Bottom);//下 145 path.AddLine(rect.Right - cornerRadius * 2 - 5, 21, x + 15, ucProcessLine1.Location.Y); 146 path.AddLine(x + 15, ucProcessLine1.Location.Y, rect.X + cornerRadius * 2 + 5, 21); 147 path.AddLine(rect.X + cornerRadius * 2 + 5, 20, rect.X + cornerRadius * 2, rect.Bottom);//下 148 path.AddArc(rect.X, rect.Bottom - cornerRadius * 2, cornerRadius * 2, cornerRadius * 2, 90, 90); 149 path.AddLine(rect.X, rect.Bottom - cornerRadius * 2, rect.X, rect.Y + cornerRadius * 2);//上 150 path.CloseFigure(); 151 152 e.Graphics.FillPath(new SolidBrush(ForeColor), path); 153 154 string strValue = ((float)Value / (float)MaxValue).ToString("0%"); 155 System.Drawing.SizeF sizeF = e.Graphics.MeasureString(strValue, Font); 156 e.Graphics.DrawString(strValue, Font, new SolidBrush(Color.White), new PointF(x + (30 - sizeF.Width) / 2+1, (20 - sizeF.Height) / 2 + 1)); 157 } 158 } 159 } 1 namespace HZH_Controls.Controls 2 { 3 partial class UCProcessLineExt 4 { 5 /// <summary> 6 /// 必需的设计器变量。 7 /// </summary> 8 private System.ComponentModel.IContainer components = null; 9 10 /// <summary> 11 /// 清理所有正在使用的资源。 12 /// </summary> 13 /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> 14 protected override void Dispose(bool disposing) 15 { 16 if (disposing && (components != null)) 17 { 18 components.Dispose(); 19 } 20 base.Dispose(disposing); 21 } 22 23 #region 组件设计器生成的代码 24 25 /// <summary> 26 /// 设计器支持所需的方法 - 不要 27 /// 使用代码编辑器修改此方法的内容。 28 /// </summary> 29 private void InitializeComponent() 30 { 31 this.ucProcessLine1 = new HZH_Controls.Controls.UCProcessLine(); 32 this.SuspendLayout(); 33 // 34 // ucProcessLine1 35 // 36 this.ucProcessLine1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 37 | System.Windows.Forms.AnchorStyles.Left) 38 | System.Windows.Forms.AnchorStyles.Right))); 39 this.ucProcessLine1.BorderColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(192)))), ((int)(((byte)(192))))); 40 this.ucProcessLine1.Font = new System.Drawing.Font("Arial Unicode MS", 10F); 41 this.ucProcessLine1.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(77)))), ((int)(((byte)(59))))); 42 this.ucProcessLine1.Location = new System.Drawing.Point(18, 33); 43 this.ucProcessLine1.MaxValue = 100; 44 this.ucProcessLine1.Name = "ucProcessLine1"; 45 this.ucProcessLine1.Size = new System.Drawing.Size(399, 16); 46 this.ucProcessLine1.TabIndex = 0; 47 this.ucProcessLine1.Text = "ucProcessLine1"; 48 this.ucProcessLine1.Value = 0; 49 this.ucProcessLine1.ValueBGColor = System.Drawing.Color.White; 50 this.ucProcessLine1.ValueColor = System.Drawing.Color.FromArgb(((int)(((byte)(73)))), ((int)(((byte)(119)))), ((int)(((byte)(232))))); 51 this.ucProcessLine1.ValueTextType = HZH_Controls.Controls.ValueTextType.None; 52 // 53 // UCProcessLineExt 54 // 55 this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None; 56 this.BackColor = System.Drawing.Color.Transparent; 57 this.Controls.Add(this.ucProcessLine1); 58 this.Name = "UCProcessLineExt"; 59 this.Size = new System.Drawing.Size(434, 50); 60 this.ResumeLayout(false); 61 62 } 63 64 #endregion 65 66 private UCProcessLine ucProcessLine1; 67 } 68 } 最后的话
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