下午好,
只是一个简单的问题。在winforms中显示新的对话框表单时,是否可以使父表单模糊?如果默认情况下不可能,是否有任何变通方法?这里只是我要归档的示例图片:
答案 0 :(得分:9)
我不认为这是可能的,但我在这里发现了一个类似的问题: Layer effects (blur, etc.) in WinForms
代码来自那里的答案,但我稍微改了一下......你需要使用unsafe on编译(参见项目属性的构建选项卡(允许不安全的代码))。
基本上,您将表单中的所有内容放在面板中(在代码中称为panel1)并调用模糊函数。我还添加了一个unblur函数以恢复正常:
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
private PictureBox pb;
public Form1()
{
InitializeComponent();
pb = new PictureBox();
panel1.Controls.Add(pb);
pb.Dock = DockStyle.Fill;
}
private void Blur()
{
Bitmap bmp = Screenshot.TakeSnapshot(panel1);
BitmapFilter.GaussianBlur(bmp, 4);
pb.Image = bmp;
pb.BringToFront();
}
private void UnBlur()
{
pb.Image = null;
pb.SendToBack();
}
}
public class BitmapFilter
{
private static bool Conv3x3(Bitmap b, ConvMatrix m)
{
// Avoid divide by zero errors
if (0 == m.Factor) return false;
Bitmap bSrc = (Bitmap)b.Clone();
// GDI+ still lies to us - the return format is BGR, NOT RGB.
BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
BitmapData bmSrc = bSrc.LockBits(new Rectangle(0, 0, bSrc.Width, bSrc.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
int stride = bmData.Stride;
int stride2 = stride * 2;
System.IntPtr Scan0 = bmData.Scan0;
System.IntPtr SrcScan0 = bmSrc.Scan0;
unsafe
{
byte* p = (byte*)(void*)Scan0;
byte* pSrc = (byte*)(void*)SrcScan0;
int nOffset = stride + 6 - b.Width * 3;
int nWidth = b.Width - 2;
int nHeight = b.Height - 2;
int nPixel;
for (int y = 0; y < nHeight; ++y)
{
for (int x = 0; x < nWidth; ++x)
{
nPixel = ((((pSrc[2] * m.TopLeft) + (pSrc[5] * m.TopMid) + (pSrc[8] * m.TopRight) +
(pSrc[2 + stride] * m.MidLeft) + (pSrc[5 + stride] * m.Pixel) + (pSrc[8 + stride] * m.MidRight) +
(pSrc[2 + stride2] * m.BottomLeft) + (pSrc[5 + stride2] * m.BottomMid) + (pSrc[8 + stride2] * m.BottomRight)) / m.Factor) + m.Offset);
if (nPixel < 0) nPixel = 0;
if (nPixel > 255) nPixel = 255;
p[5 + stride] = (byte)nPixel;
nPixel = ((((pSrc[1] * m.TopLeft) + (pSrc[4] * m.TopMid) + (pSrc[7] * m.TopRight) +
(pSrc[1 + stride] * m.MidLeft) + (pSrc[4 + stride] * m.Pixel) + (pSrc[7 + stride] * m.MidRight) +
(pSrc[1 + stride2] * m.BottomLeft) + (pSrc[4 + stride2] * m.BottomMid) + (pSrc[7 + stride2] * m.BottomRight)) / m.Factor) + m.Offset);
if (nPixel < 0) nPixel = 0;
if (nPixel > 255) nPixel = 255;
p[4 + stride] = (byte)nPixel;
nPixel = ((((pSrc[0] * m.TopLeft) + (pSrc[3] * m.TopMid) + (pSrc[6] * m.TopRight) +
(pSrc[0 + stride] * m.MidLeft) + (pSrc[3 + stride] * m.Pixel) + (pSrc[6 + stride] * m.MidRight) +
(pSrc[0 + stride2] * m.BottomLeft) + (pSrc[3 + stride2] * m.BottomMid) + (pSrc[6 + stride2] * m.BottomRight)) / m.Factor) + m.Offset);
if (nPixel < 0) nPixel = 0;
if (nPixel > 255) nPixel = 255;
p[3 + stride] = (byte)nPixel;
p += 3;
pSrc += 3;
}
p += nOffset;
pSrc += nOffset;
}
}
b.UnlockBits(bmData);
bSrc.UnlockBits(bmSrc);
return true;
}
public static bool GaussianBlur(Bitmap b, int nWeight /* default to 4*/)
{
ConvMatrix m = new ConvMatrix();
m.SetAll(1);
m.Pixel = nWeight;
m.TopMid = m.MidLeft = m.MidRight = m.BottomMid = 2;
m.Factor = nWeight + 12;
return BitmapFilter.Conv3x3(b, m);
}
public class ConvMatrix
{
public int TopLeft = 0, TopMid = 0, TopRight = 0;
public int MidLeft = 0, Pixel = 1, MidRight = 0;
public int BottomLeft = 0, BottomMid = 0, BottomRight = 0;
public int Factor = 1;
public int Offset = 0;
public void SetAll(int nVal)
{
TopLeft = TopMid = TopRight = MidLeft = Pixel = MidRight = BottomLeft = BottomMid = BottomRight = nVal;
}
}
}
class Screenshot
{
public static Bitmap TakeSnapshot(Control ctl)
{
Bitmap bmp = new Bitmap(ctl.Size.Width, ctl.Size.Height);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bmp);
g.CopyFromScreen(ctl.PointToScreen(ctl.ClientRectangle.Location), new Point(0, 0), ctl.ClientRectangle.Size);
return bmp;
}
}
}
答案 1 :(得分:-1)
这可以通过Ajax Modal弹出扩展器来实现。它会自动创建模糊背景格式。你必须添加ajax扩展器。
我在网站上帮助创建了一个登录对话框。你必须为那个添加ajax控件工具包 希望这有帮助..尝试这个链接 http://www.asp.net/ajaxlibrary/ajaxcontroltoolkitsamplesite/modalpopup/modalpopup.aspx