C#尝试在.bmp上键入文本
我正在尝试将文本键入.bmp,通常文本框的背景为黑色,我想将其更改为.bmp。.bmp的名称为205.bmp。 我发现了这段代码,我认为它将Richtextbox的背景设置为黑色。如何将其更改为使用图片背景C#尝试在.bmp上键入文本,c#,text,bmp,C#,Text,Bmp,我正在尝试将文本键入.bmp,通常文本框的背景为黑色,我想将其更改为.bmp。.bmp的名称为205.bmp。 我发现了这段代码,我认为它将Richtextbox的背景设置为黑色。如何将其更改为使用图片背景 public Bitmap RtbToBitmap(RichTextBox rtb, int width, int height) { Bitmap bmp = new Bitmap(width, height, PixelFormat.Format24bpp
public Bitmap RtbToBitmap(RichTextBox rtb, int width, int height)
{
Bitmap bmp = new Bitmap(width, height, PixelFormat.Format24bppRgb);
using (Graphics gr = Graphics.FromImage(bmp))
{
gr.Clear(Color.Black);
System.IntPtr hDC = gr.GetHdc(); // 屏幕做为画源
FORMATRANGE fmtRange;
RECT rect;
int fromAPI;
float inch = 100F;
rect.Top = 10;
rect.Left = 10;
rect.Bottom = (int)(bmp.Height + (bmp.Height * (bmp.HorizontalResolution / 100)) * inch);
rect.Right = bmp.Width * 15;
fmtRange.chrg.cpMin = 0;
fmtRange.chrg.cpMax = -1;
fmtRange.hdc = hDC;
fmtRange.hdcTarget = hDC;
fmtRange.rc = rect;
fmtRange.rcPage = rect;
int wParam = 1;
System.IntPtr lParam = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(Marshal.SizeOf(fmtRange));
System.Runtime.InteropServices.Marshal.StructureToPtr(fmtRange, lParam, false);
fromAPI = SendMessage(rtb.Handle, EM_FORMATRANGE, wParam, lParam);
System.Runtime.InteropServices.Marshal.FreeCoTaskMem(lParam);
fromAPI = SendMessage(rtb.Handle, EM_FORMATRANGE, wParam, new IntPtr(0));
gr.ReleaseHdc(hDC);
}
return bmp;
}
有人能帮我吗
public Bitmap RtbToBitmap(RichTextBox rtb)
{
Bitmap bmp = // Load your Image here
using (Graphics gr = Graphics.FromImage(bmp))
{
// gr.Clear(Color.Black); // Don't clear it with black
System.IntPtr hDC = gr.GetHdc(); // 屏幕做为画源
FORMATRANGE fmtRange;
RECT rect;
int fromAPI;
float inch = 100F;
rect.Top = 10;
rect.Left = 10;
rect.Bottom = (int)(bmp.Height + (bmp.Height * (bmp.HorizontalResolution / 100)) * inch);
rect.Right = bmp.Width * 15;
fmtRange.chrg.cpMin = 0;
fmtRange.chrg.cpMax = -1;
fmtRange.hdc = hDC;
fmtRange.hdcTarget = hDC;
fmtRange.rc = rect;
fmtRange.rcPage = rect;
int wParam = 1;
System.IntPtr lParam = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(Marshal.SizeOf(fmtRange));
System.Runtime.InteropServices.Marshal.StructureToPtr(fmtRange, lParam, false);
fromAPI = SendMessage(rtb.Handle, EM_FORMATRANGE, wParam, lParam);
System.Runtime.InteropServices.Marshal.FreeCoTaskMem(lParam);
fromAPI = SendMessage(rtb.Handle, EM_FORMATRANGE, wParam, new IntPtr(0));
gr.ReleaseHdc(hDC);
}
return bmp;
}
那应该是你想要的
这应该是您想要的如下所示:位图bmp=(@Application.StartupPath+“205.bmp”)
Bitmap bmp
是类型为Bitmap
的变量,但(@Application.StartupPath+“205.bmp”)
是字符串。您必须从保存的图像创建位图!查看一下位图的不同构造函数是的,我找到了。。。你的帖子真的很有用。。。非常感谢。如下所示:位图bmp=(@Application.StartupPath+“205.bmp”)Bitmap bmp
是类型为Bitmap
的变量,但(@Application.StartupPath+“205.bmp”)
是字符串。您必须从保存的图像创建位图!查看一下位图的不同构造函数是的,我找到了。。。你的帖子真的很有用。。。非常感谢。