我整天都在这个问题上,终于有一个解决方案。尝试监听WM_PASTE消息不起作用,因为Ctrl-V正在被基础mshtml控件预处理。您可以侦听OnKeyDown/Up等来捕获Ctrl-V,但这不会阻止基础控件继续使用其默认粘贴行为。我的解决方案是防止Ctrl-V消息的预处理,然后执行我自己的粘贴行为。若要从预处理CtrlV消息,我不得不继承我的控制是AxWebBrowser停止控制,
public class DisabledPasteWebBrowser : AxWebBrowser
{
const int WM_KEYDOWN = 0x100;
const int CTRL_WPARAM = 0x11;
const int VKEY_WPARAM = 0x56;
Message prevMsg;
public override bool PreProcessMessage(ref Message msg)
{
if (prevMsg.Msg == WM_KEYDOWN && prevMsg.WParam == new IntPtr(CTRL_WPARAM) && msg.Msg == WM_KEYDOWN && msg.WParam == new IntPtr(VKEY_WPARAM))
{
// Do not let this Control process Ctrl-V, we'll do it manually.
HtmlEditorControl parentControl = this.Parent as HtmlEditorControl;
if (parentControl != null)
{
parentControl.ExecuteCommandDocument("Paste");
}
return true;
}
prevMsg = msg;
return base.PreProcessMessage(ref msg);
}
}
这里是处理粘贴命令我自定义的方法,你可以做从剪贴板中的图像数据类似的东西。
internal void ExecuteCommandDocument(string command, bool prompt)
{
try
{
// ensure command is a valid command and then enabled for the selection
if (document.queryCommandSupported(command))
{
if (command == HTML_COMMAND_TEXT_PASTE && Clipboard.ContainsImage())
{
// Save image to user temp dir
String imagePath = Path.GetTempPath() + "\\" + Path.GetRandomFileName() + ".jpg";
Clipboard.GetImage().Save(imagePath, System.Drawing.Imaging.ImageFormat.Jpeg);
// Insert image href in to html with temp path
Uri uri = null;
Uri.TryCreate(imagePath, UriKind.Absolute, out uri);
document.execCommand(HTML_COMMAND_INSERT_IMAGE, false, uri.ToString());
// Update pasted id
Guid elementId = Guid.NewGuid();
GetFirstControl().id = elementId.ToString();
// Fire event that image saved to any interested listeners who might want to save it elsewhere as well
if (OnImageInserted != null)
{
OnImageInserted(this, new ImageInsertEventArgs { HrefUrl = uri.ToString(), TempPath = imagePath, HtmlElementId = elementId.ToString() });
}
}
else
{
// execute the given command
document.execCommand(command, prompt, null);
}
}
}
catch (Exception ex)
{
// Unknown error so inform user
throw new HtmlEditorException("Unknown MSHTML Error.", command, ex);
}
}
希望有人认为这有帮助,并且不会像今天一样浪费我一天的时间。