blocks|key|320460|text|据我所知，在WinForms中没有直接的方法可以做到这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|320461|相反，您可以一步一步地执行以下操作：|320462|1)使用photoshop或任何其他工具创建具有所需投影的图像。|320463|2)将此图像用作窗体的背景图像。|320464|3)将窗体的FormBorderStyle属性设置为None。|320465|4)你完成了！|320466|5)注意:请确保将图片保存为正确的格式(如png)，以使投射阴影效果生效。|320467|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|S|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|T|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|U|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|V|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|O|$]]

As far as I know, there is no direct way of doing this in WinForms.

Instead, you can follow this step by step:

1) Create an image having the desired drop shadow using photoshop or any other tool. 
2) Use this image as background image of your form. 
3) Set FormBorderStyle property of the form to None. 
4) You are done! 
5) Note: Make sure to save the image in proper format(such as png) so that the drop shadow effect could work.

blocks|key|103554|text|嗯，，，刚刚通过代码，你会得到Windows7的阴影，像这样的>>>+http://marcin.floryan.pl/wp-content/uploads/2010/08/WPF-Window-native-shadow.png|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|103555|Imports+System.Runtime.InteropServices

Public+Class+IMSS_SplashScreen
++++Private+aeroEnabled+As+Boolean
++++Protected+Overrides+ReadOnly+Property+CreateParams()+As+CreateParams
++++++++Get
++++++++++++CheckAeroEnabled()
++++++++++++Dim+cp+As+CreateParams+=+MyBase.CreateParams
++++++++++++If+Not+aeroEnabled+Then
++++++++++++++++cp.ClassStyle+=+cp.ClassStyle+Or+NativeConstants.CS_DROPSHADOW
++++++++++++++++Return+cp
++++++++++++Else
++++++++++++++++Return+cp
++++++++++++End+If
++++++++End+Get
++++End+Property
++++Protected+Overrides+Sub+WndProc(ByRef+m+As+Message)
++++++++Select+Case+m.Msg
++++++++++++Case+NativeConstants.WM_NCPAINT
++++++++++++++++Dim+val+=+2
++++++++++++++++If+aeroEnabled+Then
++++++++++++++++++++NativeMethods.DwmSetWindowAttribute(Handle,+2,+val,+4)
++++++++++++++++++++Dim+bla+As+New+NativeStructs.MARGINS()
++++++++++++++++++++With+bla
++++++++++++++++++++++++.bottomHeight+=+1
++++++++++++++++++++++++.leftWidth+=+1
++++++++++++++++++++++++.rightWidth+=+1
++++++++++++++++++++++++.topHeight+=+1
++++++++++++++++++++End+With
++++++++++++++++++++NativeMethods.DwmExtendFrameIntoClientArea(Handle,+bla)
++++++++++++++++End+If
++++++++++++++++Exit+Select
++++++++End+Select
++++++++MyBase.WndProc(m)
++++End+Sub
++++Private+Sub+CheckAeroEnabled()
++++++++If+Environment.OSVersion.Version.Major+>=+6+Then
++++++++++++Dim+enabled+As+Integer+=+0
++++++++++++Dim+response+As+Integer+=+NativeMethods.DwmIsCompositionEnabled(enabled)
++++++++++++aeroEnabled+=+(enabled+=+1)
++++++++Else
++++++++++++aeroEnabled+=+False
++++++++End+If
++++End+Sub
End+Class
Public+Class+NativeStructs
++++Public+Structure+MARGINS
++++++++Public+leftWidth+As+Integer
++++++++Public+rightWidth+As+Integer
++++++++Public+topHeight+As+Integer
++++++++Public+bottomHeight+As+Integer
++++End+Structure
End+Class
Public+Class+NativeMethods
++++<DllImport("dwmapi")>+_
++++Public+Shared+Function+DwmExtendFrameIntoClientArea(ByVal+hWnd+As+IntPtr,+ByRef+pMarInset+As+NativeStructs.MARGINS)+As+Integer
++++End+Function
++++<DllImport("dwmapi")>+_
++++Friend+Shared+Function+DwmSetWindowAttribute(ByVal+hwnd+As+IntPtr,+ByVal+attr+As+Integer,+ByRef+attrValue+As+Integer,+ByVal+attrSize+As+Integer)+As+Integer
++++End+Function
++++<DllImport("dwmapi.dll")>+_
++++Public+Shared+Function+DwmIsCompositionEnabled(ByRef+pfEnabled+As+Integer)+As+Integer
++++End+Function
End+Class
Public+Class+NativeConstants
++++Public+Const+CS_DROPSHADOW+As+Integer+=+&H20000
++++Public+Const+WM_NCPAINT+As+Integer+=+&H85
End+Class|code-block|syntax|javascript|103556|entityMap|0|LINK|mutability|MUTABLE|url|http://marcin.floryan.pl/wp-content/uploads/2010/08/WPF-Window-native-shadow.png^0|Z|28|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Humm ,,, Just past the code and you will get the windows 7 Drop Shadow
like this >>> <a href="http://marcin.floryan.pl/wp-content/uploads/2010/08/WPF-Window-native-shadow.png">http://marcin.floryan.pl/wp-content/uploads/2010/08/WPF-Window-native-shadow.png</a>

<pre><code>Imports System.Runtime.InteropServices

Public Class IMSS_SplashScreen
 Private aeroEnabled As Boolean
 Protected Overrides ReadOnly Property CreateParams() As CreateParams
 Get
 CheckAeroEnabled()
 Dim cp As CreateParams = MyBase.CreateParams
 If Not aeroEnabled Then
 cp.ClassStyle = cp.ClassStyle Or NativeConstants.CS_DROPSHADOW
 Return cp
 Else
 Return cp
 End If
 End Get
 End Property
 Protected Overrides Sub WndProc(ByRef m As Message)
 Select Case m.Msg
 Case NativeConstants.WM_NCPAINT
 Dim val = 2
 If aeroEnabled Then
 NativeMethods.DwmSetWindowAttribute(Handle, 2, val, 4)
 Dim bla As New NativeStructs.MARGINS()
 With bla
 .bottomHeight = 1
 .leftWidth = 1
 .rightWidth = 1
 .topHeight = 1
 End With
 NativeMethods.DwmExtendFrameIntoClientArea(Handle, bla)
 End If
 Exit Select
 End Select
 MyBase.WndProc(m)
 End Sub
 Private Sub CheckAeroEnabled()
 If Environment.OSVersion.Version.Major &gt;= 6 Then
 Dim enabled As Integer = 0
 Dim response As Integer = NativeMethods.DwmIsCompositionEnabled(enabled)
 aeroEnabled = (enabled = 1)
 Else
 aeroEnabled = False
 End If
 End Sub
End Class
Public Class NativeStructs
 Public Structure MARGINS
 Public leftWidth As Integer
 Public rightWidth As Integer
 Public topHeight As Integer
 Public bottomHeight As Integer
 End Structure
End Class
Public Class NativeMethods
 &lt;DllImport("dwmapi")&gt; _
 Public Shared Function DwmExtendFrameIntoClientArea(ByVal hWnd As IntPtr, ByRef pMarInset As NativeStructs.MARGINS) As Integer
 End Function
 &lt;DllImport("dwmapi")&gt; _
 Friend Shared Function DwmSetWindowAttribute(ByVal hwnd As IntPtr, ByVal attr As Integer, ByRef attrValue As Integer, ByVal attrSize As Integer) As Integer
 End Function
 &lt;DllImport("dwmapi.dll")&gt; _
 Public Shared Function DwmIsCompositionEnabled(ByRef pfEnabled As Integer) As Integer
 End Function
End Class
Public Class NativeConstants
 Public Const CS_DROPSHADOW As Integer = &amp;H20000
 Public Const WM_NCPAINT As Integer = &amp;H85
End Class
</code></pre>

blocks|key|320518|text|下面是我的C#实现。它和阿尔很相似。Petro的，但你会注意到，当你失去焦点并重新获得焦点时，阴影会重新着色。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|320519|我还添加了允许鼠标拖动的代码。|320520|public+partial+class+Form1:+Form
{
++++[DllImport("Gdi32.dll",+EntryPoint+=+"CreateRoundRectRgn")]
++++private+static+extern+IntPtr+CreateRoundRectRgn
++++(
++++++++int+nLeftRect,+//+x-coordinate+of+upper-left+corner
++++++++int+nTopRect,+//+y-coordinate+of+upper-left+corner
++++++++int+nRightRect,+//+x-coordinate+of+lower-right+corner
++++++++int+nBottomRect,+//+y-coordinate+of+lower-right+corner
++++++++int+nWidthEllipse,+//+height+of+ellipse
++++++++int+nHeightEllipse+//+width+of+ellipse
+++++);++++++++

++++[DllImport("dwmapi.dll")]
++++public+static+extern+int+DwmExtendFrameIntoClientArea(IntPtr+hWnd,+ref+MARGINS+pMarInset);

++++[DllImport("dwmapi.dll")]
++++public+static+extern+int+DwmSetWindowAttribute(IntPtr+hwnd,+int+attr,+ref+int+attrValue,+int+attrSize);

++++[DllImport("dwmapi.dll")]
++++public+static+extern+int+DwmIsCompositionEnabled(ref+int+pfEnabled);

++++private+bool+m_aeroEnabled;+++++++++++++++++++++//+variables+for+box+shadow
++++private+const+int+CS_DROPSHADOW+=+0x00020000;
++++private+const+int+WM_NCPAINT+=+0x0085;
++++private+const+int+WM_ACTIVATEAPP+=+0x001C;

++++public+struct+MARGINS+++++++++++++++++++++++++++//+struct+for+box+shadow
++++{
++++++++public+int+leftWidth;
++++++++public+int+rightWidth;
++++++++public+int+topHeight;
++++++++public+int+bottomHeight;
++++}

++++private+const+int+WM_NCHITTEST+=+0x84;++++++++++//+variables+for+dragging+the+form
++++private+const+int+HTCLIENT+=+0x1;
++++private+const+int+HTCAPTION+=+0x2;

++++protected+override+CreateParams+CreateParams
++++{
++++++++get
++++++++{
++++++++++++m_aeroEnabled+=+CheckAeroEnabled();

++++++++++++CreateParams+cp+=+base.CreateParams;
++++++++++++if+(!m_aeroEnabled)
++++++++++++++++cp.ClassStyle+%7C=+CS_DROPSHADOW;

++++++++++++return+cp;
++++++++}
++++}

++++private+bool+CheckAeroEnabled()
++++{
++++++++if+(Environment.OSVersion.Version.Major+>=+6)
++++++++{
++++++++++++int+enabled+=+0;
++++++++++++DwmIsCompositionEnabled(ref+enabled);
++++++++++++return+(enabled+==+1)+?+true+:+false;
++++++++}
++++++++return+false;
++++}

++++protected+override+void+WndProc(ref+Message+m)
++++{
++++++++switch+(m.Msg)
++++++++{
++++++++++++case+WM_NCPAINT:++++++++++++++++++++++++//+box+shadow
++++++++++++++++if+(m_aeroEnabled)
++++++++++++++++{
++++++++++++++++++++var+v+=+2;
++++++++++++++++++++DwmSetWindowAttribute(this.Handle,+2,+ref+v,+4);
++++++++++++++++++++MARGINS+margins+=+new+MARGINS()
++++++++++++++++++++{
++++++++++++++++++++++++bottomHeight+=+1,
++++++++++++++++++++++++leftWidth+=+1,
++++++++++++++++++++++++rightWidth+=+1,
++++++++++++++++++++++++topHeight+=+1
++++++++++++++++++++};
++++++++++++++++++++DwmExtendFrameIntoClientArea(this.Handle,+ref+margins);

++++++++++++++++}
++++++++++++++++break;
++++++++++++default:
++++++++++++++++break;
++++++++}
++++++++base.WndProc(ref+m);

++++++++if+(m.Msg+==+WM_NCHITTEST+&&+(int)m.Result+==+HTCLIENT)+++++//+drag+the+form
++++++++++++m.Result+=+(IntPtr)HTCAPTION;

++++}

++++public+Form1()
++++{
++++++++m_aeroEnabled+=+false;

++++++++this.FormBorderStyle+=+FormBorderStyle.None;

++++++++InitializeComponent();
++++}
}|code-block|syntax|javascript|320521|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Here's my C# implementation. It's similar to Al. Petro's, but you'll notice that when you lose focus and regain focus, the shadow repaints itself.

I've also added code to allow mouse-dragging.

<pre><code>public partial class Form1: Form
{
 [DllImport("Gdi32.dll", EntryPoint = "CreateRoundRectRgn")]
 private static extern IntPtr CreateRoundRectRgn
 (
 int nLeftRect, // x-coordinate of upper-left corner
 int nTopRect, // y-coordinate of upper-left corner
 int nRightRect, // x-coordinate of lower-right corner
 int nBottomRect, // y-coordinate of lower-right corner
 int nWidthEllipse, // height of ellipse
 int nHeightEllipse // width of ellipse
 ); 

 [DllImport("dwmapi.dll")]
 public static extern int DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarInset);

 [DllImport("dwmapi.dll")]
 public static extern int DwmSetWindowAttribute(IntPtr hwnd, int attr, ref int attrValue, int attrSize);

 [DllImport("dwmapi.dll")]
 public static extern int DwmIsCompositionEnabled(ref int pfEnabled);

 private bool m_aeroEnabled; // variables for box shadow
 private const int CS_DROPSHADOW = 0x00020000;
 private const int WM_NCPAINT = 0x0085;
 private const int WM_ACTIVATEAPP = 0x001C;

 public struct MARGINS // struct for box shadow
 {
 public int leftWidth;
 public int rightWidth;
 public int topHeight;
 public int bottomHeight;
 }

 private const int WM_NCHITTEST = 0x84; // variables for dragging the form
 private const int HTCLIENT = 0x1;
 private const int HTCAPTION = 0x2;

 protected override CreateParams CreateParams
 {
 get
 {
 m_aeroEnabled = CheckAeroEnabled();

 CreateParams cp = base.CreateParams;
 if (!m_aeroEnabled)
 cp.ClassStyle |= CS_DROPSHADOW;

 return cp;
 }
 }

 private bool CheckAeroEnabled()
 {
 if (Environment.OSVersion.Version.Major &gt;= 6)
 {
 int enabled = 0;
 DwmIsCompositionEnabled(ref enabled);
 return (enabled == 1) ? true : false;
 }
 return false;
 }

 protected override void WndProc(ref Message m)
 {
 switch (m.Msg)
 {
 case WM_NCPAINT: // box shadow
 if (m_aeroEnabled)
 {
 var v = 2;
 DwmSetWindowAttribute(this.Handle, 2, ref v, 4);
 MARGINS margins = new MARGINS()
 {
 bottomHeight = 1,
 leftWidth = 1,
 rightWidth = 1,
 topHeight = 1
 };
 DwmExtendFrameIntoClientArea(this.Handle, ref margins);

 }
 break;
 default:
 break;
 }
 base.WndProc(ref m);

 if (m.Msg == WM_NCHITTEST &amp;&amp; (int)m.Result == HTCLIENT) // drag the form
 m.Result = (IntPtr)HTCAPTION;

 }

 public Form1()
 {
 m_aeroEnabled = false;

 this.FormBorderStyle = FormBorderStyle.None;

 InitializeComponent();
 }
}
</code></pre>

I'm trying to drop a shadow around the whole form just like the first picture, except that that is a WPF, not a WinForm. now I want to drop the same shadow on a winform.

This is what I want..¬

<img src="https://marcin.floryan.pl/wp-content/uploads/2010/08/WPF-Window-native-shadow.png" alt="Windows Form Shadow">

Not this..¬

<img src="https://www.codeproject.com/KB/static/Transparent_drop_shadow_i/shadow3.png" alt="Windows Form Shadow">

Drop Shadow On A Borderless WinForm

我试着在整个表单周围放置一个阴影，就像第一张图片一样，除了那是一个WPF，而不是一个WinForm。现在，我想在winform上放置相同的阴影。这就是我想要的..​​不是这个..。​​

问无边界WinForm上的阴影
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问无边界WinForm上的阴影EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问无边界WinForm上的阴影
EN