我有一个带有 WebBrowser 控件的应用程序。 我通过单击按钮加载一个页面。 然后我想从 Web 浏览器的上下文菜单运行“转换为 Adobe PDF”操作,但是...当我尝试通过以下方式访问上下文菜单时:
foreach (MenuItem vMenuItem in WebBrowser.ContextMenu.MenuItems)
{
if (vMenuItem.Text.Contains("onwert") && vMenuItem.Text.Contains("PDF"))
{
vMenuItem.PerformClick();
}
}
IDE 在线显示错误“对象引用未设置到对象的实例”
foreach (MenuItem vMenuItem in WebBrowser.ContextMenu.MenuItems)
我没有创建自己的上下文菜单,我希望显示默认的上下文菜单。 如何访问 Web 浏览器的上下文菜单并执行该操作?
最佳答案
我也遇到了和你类似的问题。我在我的帖子 here 中提到了您的问题。 如果您仍然对此问题感兴趣,这是利用模拟点击的有效解决方案:
//Example of how to use the code:
Point controlLoc = this.PointToScreen(webbrowser1.Location);
controlLoc.X = controlLoc.X + webbrowser1.Document.GetElementById("sbvdcapimg").OffsetRectangle.Left+65;
controlLoc.Y = controlLoc.Y + webbrowser1.Document.GetElementById("sbvdcapimg").OffsetRectangle.Top+50;
Cursor.Position = controlLoc;
MouseSimulator.ClickRightMouseButton();
controlLoc.X = controlLoc.X + (webbrowser1.Document.GetElementById("sbvdcapimg").OffsetRectangle.Left + 95);
controlLoc.Y = controlLoc.Y + (webbrowser1.Document.GetElementById("sbvdcapimg").OffsetRectangle.Top + 45);
Cursor.Position = controlLoc;
MouseSimulator.ClickLeftMouseButton();
public class MouseSimulator
{
[DllImport("user32.dll", SetLastError = true)]
static extern uint SendInput(uint nInputs, ref INPUT pInputs, int cbSize);
[StructLayout(LayoutKind.Sequential)]
struct INPUT
{
public SendInputEventType type;
public MouseKeybdhardwareInputUnion mkhi;
}
[StructLayout(LayoutKind.Explicit)]
struct MouseKeybdhardwareInputUnion
{
[FieldOffset(0)]
public MouseInputData mi;
[FieldOffset(0)]
public KEYBDINPUT ki;
[FieldOffset(0)]
public HARDWAREINPUT hi;
}
[StructLayout(LayoutKind.Sequential)]
struct KEYBDINPUT
{
public ushort wVk;
public ushort wScan;
public uint dwFlags;
public uint time;
public IntPtr dwExtraInfo;
}
[StructLayout(LayoutKind.Sequential)]
struct HARDWAREINPUT
{
public int uMsg;
public short wParamL;
public short wParamH;
}
struct MouseInputData
{
public int dx;
public int dy;
public uint mouseData;
public MouseEventFlags dwFlags;
public uint time;
public IntPtr dwExtraInfo;
}
[Flags]
enum MouseEventFlags : uint
{
MOUSEEVENTF_MOVE = 0x0001,
MOUSEEVENTF_LEFTDOWN = 0x0002,
MOUSEEVENTF_LEFTUP = 0x0004,
MOUSEEVENTF_RIGHTDOWN = 0x0008,
MOUSEEVENTF_RIGHTUP = 0x0010,
MOUSEEVENTF_MIDDLEDOWN = 0x0020,
MOUSEEVENTF_MIDDLEUP = 0x0040,
MOUSEEVENTF_XDOWN = 0x0080,
MOUSEEVENTF_XUP = 0x0100,
MOUSEEVENTF_WHEEL = 0x0800,
MOUSEEVENTF_VIRTUALDESK = 0x4000,
MOUSEEVENTF_ABSOLUTE = 0x8000
}
enum SendInputEventType : int
{
InputMouse,
InputKeyboard,
InputHardware
}
public static void ClickRightMouseButton()
{
INPUT mouseDownInput = new INPUT();
mouseDownInput.type = SendInputEventType.InputMouse;
mouseDownInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_RIGHTDOWN;
SendInput(1, ref mouseDownInput, Marshal.SizeOf(new INPUT()));
INPUT mouseUpInput = new INPUT();
mouseUpInput.type = SendInputEventType.InputMouse;
mouseUpInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_RIGHTUP;
SendInput(1, ref mouseUpInput, Marshal.SizeOf(new INPUT()));
}
public static void ClickLeftMouseButton()
{
INPUT mouseDownInput = new INPUT();
mouseDownInput.type = SendInputEventType.InputMouse;
mouseDownInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTDOWN;
SendInput(1, ref mouseDownInput, Marshal.SizeOf(new INPUT()));
INPUT mouseUpInput = new INPUT();
mouseUpInput.type = SendInputEventType.InputMouse;
mouseUpInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTUP;
SendInput(1, ref mouseUpInput, Marshal.SizeOf(new INPUT()));
}
关于c# - WebBrowser ContextMenu 菜单项的运行操作,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23264529/