C# Winform 实现自定义半透明遮罩层介绍

在网页中通过div+css实现半透明效果不难,今天我们看看一种在winfrom中实现的方法:

效果图如下,正常时:

C# Winform 实现自定义半透明遮罩层 - 1

显示遮罩层时:

C# Winform 实现自定义半透明遮罩层 - 2

自定义遮罩层控件的源码如下:

 

1 using System;
2 using System.Drawing;
3 using System.Windows.Forms;
4 using System.ComponentModel;
5  
6 namespace MyOpaqueLayer
7 {
8     /// <summary>
9     /// 自定义控件:半透明控件
10     /// </summary>
11     /*
12      * [ToolboxBitmap(typeof(MyOpaqueLayer))]
13      * 用于指定当把你做好的自定义控件添加到工具栏时,工具栏显示的图标。
14      * 正确写法应该是
15      * [ToolboxBitmap(typeof(XXXXControl),"xxx.bmp")]
16      * 其中XXXXControl是你的自定义控件,"xxx.bmp"是你要用的图标名称。
17     */
18     [ToolboxBitmap(typeof(MyOpaqueLayer))]
19     public class MyOpaqueLayer : System.Windows.Forms.Control
20     {
21         private bool _transparentBG = true;//是否使用透明
22         private int _alpha = 125;//设置透明度
23        
24         private System.ComponentModel.Container components = new System.ComponentModel.Container();
25  
26         public MyOpaqueLayer()
27             : this(125, true)
28         {
29         }
30  
31         public MyOpaqueLayer(int Alpha, bool IsShowLoadingImage)
32         {
33             SetStyle(System.Windows.Forms.ControlStyles.Opaque, true);
34             base.CreateControl();
35  
36             this._alpha = Alpha;
37             if (IsShowLoadingImage)
38             {
39                 PictureBox pictureBox_Loading = new PictureBox();
40                 pictureBox_Loading.BackColor = System.Drawing.Color.White;
41                 pictureBox_Loading.Image = 加载中.Properties.Resources.loading; 
42                 pictureBox_Loading.Name = "pictureBox_Loading";
43                 pictureBox_Loading.Size = new System.Drawing.Size(48, 48);
44                 pictureBox_Loading.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize;
45                 Point Location = new Point(this.Location.X + (this.Width - pictureBox_Loading.Width) / 2, this.Location.Y + (this.Height - pictureBox_Loading.Height) / 2);//居中
46                 pictureBox_Loading.Location = Location;
47                 pictureBox_Loading.Anchor = AnchorStyles.None;
48                 this.Controls.Add(pictureBox_Loading);
49             }
50         }
51  
52  
53         protected override void Dispose(bool disposing)
54         {
55             if (disposing)
56             {
57                 if (!((components == null)))
58                 {
59                     components.Dispose();
60                 }
61             }
62             base.Dispose(disposing);
63         }
64  
65         /// <summary>
66         /// 自定义绘制窗体
67         /// </summary>
68         /// <param name="e"></param>
69         protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
70         {
71             float vlblControlWidth;
72             float vlblControlHeight;
73  
74             Pen labelBorderPen;
75             SolidBrush labelBackColorBrush;
76  
77             if (_transparentBG)
78             {
79                 Color drawColor = Color.FromArgb(this._alpha, this.BackColor);
80                 labelBorderPen = new Pen(drawColor, 0);
81                 labelBackColorBrush = new SolidBrush(drawColor);
82             }
83             else
84             {
85                 labelBorderPen = new Pen(this.BackColor, 0);
86                 labelBackColorBrush = new SolidBrush(this.BackColor);
87             }
88             base.OnPaint(e);
89             vlblControlWidth = this.Size.Width;
90             vlblControlHeight = this.Size.Height;
91             e.Graphics.DrawRectangle(labelBorderPen, 0, 0, vlblControlWidth, vlblControlHeight);
92             e.Graphics.FillRectangle(labelBackColorBrush, 0, 0, vlblControlWidth, vlblControlHeight);
93         }
94  
95  
96         protected override CreateParams CreateParams//v1.10
97         {
98             get
99             {
100                 CreateParams cp = base.CreateParams;
101                 cp.ExStyle |= 0x00000020; //0x20;  // 开启 WS_EX_TRANSPARENT,使控件支持透明
102                 return cp;
103             }
104         }
105  
106         /*
107          * [Category("myOpaqueLayer"), Description("是否使用透明,默认为True")]
108          * 一般用于说明你自定义控件的属性(Property)。
109          * Category用于说明该属性属于哪个分类,Description自然就是该属性的含义解释。
110          */
111         [Category("MyOpaqueLayer"), Description("是否使用透明,默认为True")]
112         public bool TransparentBG
113         {
114             get
115             {
116                 return _transparentBG;
117             }
118             set
119             {
120                 _transparentBG = value;
121                 this.Invalidate();
122             }
123         }
124  
125         [Category("MyOpaqueLayer"), Description("设置透明度")]
126         public int Alpha
127         {
128             get
129             {
130                 return _alpha;
131             }
132             set
133             {
134                 _alpha = value;
135                 this.Invalidate();
136             }
137         }
138     }
139 }

 

OpaqueCommand的方法:ShowOpaqueLayer(显示遮罩层)和HideOpaqueLayer(隐藏遮罩层)

 

1 using System;
2 using System.Windows.Forms;
3  
4 namespace 加载中
5 {
6     class OpaqueCommand
7     {
8         private MyOpaqueLayer.MyOpaqueLayer m_OpaqueLayer = null;//半透明蒙板层
9  
10         /// <summary>
11         /// 显示遮罩层
12         /// </summary>
13         /// <param name="control">控件</param>
14         /// <param name="alpha">透明度</param>
15         /// <param name="isShowLoadingImage">是否显示图标</param>
16         public void ShowOpaqueLayer(Control control, int alpha, bool isShowLoadingImage)
17         {
18             try
19             {
20                 if (this.m_OpaqueLayer == null)
21                 {
22                     this.m_OpaqueLayer = new MyOpaqueLayer.MyOpaqueLayer(alpha, isShowLoadingImage);
23                     control.Controls.Add(this.m_OpaqueLayer);
24                     this.m_OpaqueLayer.Dock = DockStyle.Fill;
25                     this.m_OpaqueLayer.BringToFront();
26                 }
27                 this.m_OpaqueLayer.Enabled = true;
28                 this.m_OpaqueLayer.Visible = true;
29             }
30             catch { }
31         }
32  
33         /// <summary>
34         /// 隐藏遮罩层
35         /// </summary>
36         public void HideOpaqueLayer()
37         {
38             try
39             {
40                 if (this.m_OpaqueLayer != null)
41                 {
42                     this.m_OpaqueLayer.Visible = false;
43                     this.m_OpaqueLayer.Enabled = false;
44                 }
45             }
46             catch(Exception ex)
47             {
48                 //MessageBox.Show(ex.Message);
49             }
50         }
51     }
52 }

 

自定义半透明遮罩层源码下载:

files.cnblogs.com/JuneZhang/%E8%87%AA%E5%AE%9A%E4%B9%89%E5%8D%8A%E9%80%8F%E6%98%8E%E9%81%AE%E7%BD%A9%E5%B1%82-%E6%BA%90%E7%A0%81.rar

posted on 2015-02-12 11:10  chen110xi  阅读(3439)  评论(2编辑  收藏  举报