C# WinForm程序使用 CefSharp开发浏览器
创建一个基础的Winform应用,并使用NuGet引用CefSharp包。使用Nuget添加引用,搜索CefSharp
,添加CefSharp.WinForm
,CefSharp.Winform依赖好几个包,这块选择这一个安装就可以了,NuGet会自动帮你把其他依赖的包一并下载好的。
CefSharp在高DPI的屏幕上出现黑边(winform)
让整个程序支持高DPI
(1)为项目添加应用程序清单文件(app.manifest),并取消下面行的注释
<application xmlns=”urn:schemas-microsoft-com:asm.v3″>
<windowsSettings>
<dpiAware xmlns=”http://schemas.microsoft.com/SMI/2005/WindowsSettings”>true</dpiAware>
</windowsSettings>
</application>
(2)将Form和UserControl的AutoScaleMode设置为Dpi
如果你做了窗体自适应(根据控件的固定大小,按照拉伸比例来拉伸),还需要以下步骤:
(3)添加获取DPI和缩放比例的帮助类(因为网上出处太多了,这里就不写引用了)
public class PrimaryScreenHelper
{
#region Win32 API
[DllImport("user32.dll")]
static extern IntPtr GetDC(IntPtr ptr);
[DllImport("gdi32.dll")]
static extern int GetDeviceCaps(
IntPtr hdc, // handle to DC
int nIndex // index of capability
);
[DllImport("user32.dll", EntryPoint = "ReleaseDC")]
static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDc);
#endregion
#region DeviceCaps常量
const int HORZRES = 8;
const int VERTRES = 10;
const int LOGPIXELSX = 88;
const int LOGPIXELSY = 90;
const int DESKTOPVERTRES = 117;
const int DESKTOPHORZRES = 118;
#endregion
#region 属性
/// <summary>
/// 获取屏幕分辨率当前物理大小
/// </summary>
public static Size WorkingArea
{
get
{
IntPtr hdc = GetDC(IntPtr.Zero);
Size size = new Size();
size.Width = GetDeviceCaps(hdc, HORZRES);
size.Height = GetDeviceCaps(hdc, VERTRES);
ReleaseDC(IntPtr.Zero, hdc);
return size;
}
}
/// <summary>
/// 当前系统DPI_X 大小 一般为96
/// </summary>
public static int DpiX
{
get
{
IntPtr hdc = GetDC(IntPtr.Zero);
int DpiX = GetDeviceCaps(hdc, LOGPIXELSX);
ReleaseDC(IntPtr.Zero, hdc);
return DpiX;
}
}
/// <summary>
/// 当前系统DPI_Y 大小 一般为96
/// </summary>
public static int DpiY
{
get
{
IntPtr hdc = GetDC(IntPtr.Zero);
int DpiX = GetDeviceCaps(hdc, LOGPIXELSY);
ReleaseDC(IntPtr.Zero, hdc);
return DpiX;
}
}
/// <summary>
/// 获取真实设置的桌面分辨率大小
/// </summary>
public static Size DESKTOP
{
get
{
IntPtr hdc = GetDC(IntPtr.Zero);
Size size = new Size();
size.Width = GetDeviceCaps(hdc, DESKTOPHORZRES);
size.Height = GetDeviceCaps(hdc, DESKTOPVERTRES);
ReleaseDC(IntPtr.Zero, hdc);
return size;
}
}
/// <summary>
/// 获取宽度缩放百分比
/// </summary>
public static float ScaleX
{
get
{
IntPtr hdc = GetDC(IntPtr.Zero);
int t = GetDeviceCaps(hdc, DESKTOPHORZRES);
int d = GetDeviceCaps(hdc, HORZRES);
float ScaleX = (float)GetDeviceCaps(hdc, DESKTOPHORZRES) / (float)GetDeviceCaps(hdc, HORZRES);
ReleaseDC(IntPtr.Zero, hdc);
return ScaleX;
}
}
/// <summary>
/// 获取高度缩放百分比
/// </summary>
public static float ScaleY
{
get
{
IntPtr hdc = GetDC(IntPtr.Zero);
float ScaleY = (float)(float)GetDeviceCaps(hdc, DESKTOPVERTRES) / (float)GetDeviceCaps(hdc, VERTRES);
ReleaseDC(IntPtr.Zero, hdc);
return ScaleY;
}
}
/// <summary>
/// 获取高DPI下屏幕的缩放比例
/// </summary>
public static float ScalePercent
{
get { return DpiX / 96.0F; }
}
#endregion
}
(4)UserControl回复为缩放前的大小
this.lblClassTime.Location = new System.Drawing.Point((int)(8 * PrimaryScreenHelper.ScalePercent), (int)(75 * PrimaryScreenHelper.ScalePercent));
this.lblClassTime.Size = new System.Drawing.Size((int)(285 * PrimaryScreenHelper.ScalePercent), (int)(22 * PrimaryScreenHelper.ScalePercent));
直接运行程序,会报错
error : CefSharp.Common contains unmanaged resoures, set your project and solution platform to x86 or x64. Alternatively for AnyCPU Support see https://github.com/cefsharp/CefSharp/issues/1714
需要指定运行的平台,在解决方案右键,选择配置管理器
在活动解决方案平台选择新建,新建一个x86的平台,再次点击启动就没有报错了
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