C# 当ToolStripDropDown编辑文本框时,鼠标光标消失
我有一个带有RichTextBox和两个按钮的用户控件。我试图在ToolStripButton点击上的ToolStripDropDown上显示这一点。我正在使用ToolStripControlHost将我的控件置于ToolStripDrowDown。当我单击表单工具栏上的ToolStripButton时,我会在某个位置显示下拉列表,并在ToolStripControlHost控件上聚焦。鼠标指针停留在ToolStripButton上方,光标位于RichTextBox。但当我开始编辑RichTextBox时,鼠标指针消失了,只有当它不在矩形中时,我才能看到它。我怎样才能修好它 这是我的密码:C# 当ToolStripDropDown编辑文本框时,鼠标光标消失,c#,toolstripdropdown,mouse-pointer,C#,Toolstripdropdown,Mouse Pointer,我有一个带有RichTextBox和两个按钮的用户控件。我试图在ToolStripButton点击上的ToolStripDropDown上显示这一点。我正在使用ToolStripControlHost将我的控件置于ToolStripDrowDown。当我单击表单工具栏上的ToolStripButton时,我会在某个位置显示下拉列表,并在ToolStripControlHost控件上聚焦。鼠标指针停留在ToolStripButton上方,光标位于RichTextBox。但当我开始编辑RichTex
private void toolBtnNote_Click(object sender, EventArgs e)
{
dropDownClosed = false;
noteChanged = false;
tsdd = new ToolStripDropDown();
this.tsdd.Opened += new EventHandler(tsdd_Opened);
this.tsdd.AutoSize = true;
NoteEdit ne = new NoteEdit();
ne.NoteText = note ?? "";
// appears when user clicks first button at my control
ne.OkClick += new NoteEdit.NoteEditEvent(ne_OkClick);
// appears when user clicks second button at my control
ne.CancelClick += new NoteEdit.NoteEditEvent(ne_CancelClick);
this.tbh = new ToolStripControlHost(ne, "noteEdit");
this.tbh.Padding = new Padding(0);
this.tbh.AutoSize = false;
this.tbh.Size = ne.Size;
this.tsdd.Items.Add(tbh);
this.tsdd.Padding = new Padding(0);
this.tsdd.Closing += new ToolStripDropDownClosingEventHandler(tsdd_Closing);
// show toolstripdrowdown at specific position at DataGridView
this.tsdd.Show(dgvMarks, cellRect.Location + new Size(0, cellRect.Height));
while (!this.dropDownClosed)
{
Application.DoEvents();
}
if(noteChanged) {...}
}
void ne_CancelClick()
{
tsdd.Close();
}
void ne_OkClick()
{
noteChanged = true;
tsdd.Close();
}
void tsdd_Opened(object sender, EventArgs e)
{
tbh.Focus();
}
void tsdd_Closing(object sender, ToolStripDropDownClosingEventArgs e)
{
dropDownClosed = true;
}
当您开始编辑文本框或RichTextBox时,鼠标光标隐藏是正常行为。当你移动鼠标时,它应该被恢复。您还应该注意,如果您尝试用TextChanged或类似的方式调用它,调用将不会产生效果。我找到了解决方案。不是最好的,但它很有效。我只是用WinApi模拟单击显示的RichTextBox,如下所示:
public class WinApiHelper
{
private const UInt32 MOUSEEVENTF_LEFTDOWN = 0x0002;
private const UInt32 MOUSEEVENTF_LEFTUP = 0x0004;
[DllImport("user32.dll")]
private static extern void mouse_event(
UInt32 dwFlags, // motion and click options
UInt32 dx, // horizontal position or change
UInt32 dy, // vertical position or change
UInt32 dwData, // wheel movement
IntPtr dwExtraInfo // application-defined information
);
public static void SendClick(Point location)
{
Cursor.Position = location;
mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, new System.IntPtr());
mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, new System.IntPtr());
}
}
private void toolBtnNote_Click(object sender, EventArgs e)
{
dropDownClosed = false;
noteChanged = false;
dgvMarks.Focus();
tsdd = new ToolStripDropDown();
this.tsdd.Opened += new EventHandler(tsdd_Opened);
this.tsdd.AutoSize = true;
NoteEdit ne = new NoteEdit();
ne.NoteText = note ?? "";
ne.OkClick += new NoteEdit.NoteEditEvent(ne_OkClick);
ne.CancelClick += new NoteEdit.NoteEditEvent(ne_CancelClick);
this.tbh = new ToolStripControlHost(ne, "noteEdit");
this.tbh.Padding = new Padding(0);
this.tbh.AutoSize = false;
this.tbh.Size = ne.Size;
this.tsdd.Items.Add(tbh);
this.tsdd.Padding = new Padding(0);
this.tsdd.Closing += new ToolStripDropDownClosingEventHandler(tsdd_Closing);
this.tsdd.Show(dgvMarks, cellRect.Location + new Size(0, cellRect.Height));
// emulate click on richtextbox at dropdown
WinApiHelper.SendClick(tsdd.Location + new Size(ne.Rtb.Location) + new Size(5, 5));
while (!this.dropDownClosed)
{
Application.DoEvents();
}
if (noteChanged)
{...}
}
谢谢你的请求。是的,它将恢复,但仅恢复外形外的显示矩形。所以,当鼠标移到我的窗体上时,光标消失了。我需要单击我的表单以显示光标。奇怪的是,当我从ContextMenuStrip项单击中显示相同的toolstripdropdown(相同的代码)时,一切正常,当我移动鼠标时,光标移到窗体上。仅当我从工具栏按钮调用toolstripdropdown时出现问题。看起来焦点停留在ToolStripButton上。