windows C#按住鼠标事件
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C# Hold down mouse event
提问by Hyman
I have a mousemove event that takes the position of the cursor and outputs it to two labels (X and Y), the value dynamically changes as I hover around. I have a mousedown event that when clicked, the same values are outputted to a textbox. How can I combine the mousedown and mousemove events so that when I hover AND hold down the mouse button, the textbox value dynamically changes as I move.
我有一个 mousemove 事件，它获取光标的位置并将其输出到两个标签（X 和 Y），当我悬停时，该值会动态变化。我有一个 mousedown 事件，当单击时，相同的值会输出到文本框。如何组合 mousedown 和 mousemove 事件，以便当我悬停并按住鼠标按钮时，文本框值会随着我的移动而动态变化。
回答by Lazarus
You can interrogate the mouse buttons in your Move event handler, i.e. :
您可以在 Move 事件处理程序中询问鼠标按钮，即：
void Form1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == MouseButtons.Left) {
String tipText = String.Format("({0}, {1})", e.X, e.Y);
trackTip.Show(tipText, this, e.Location);
}
}
回答by Bob Vale
Track the mouse down and mouse up events to set a variable determining whether or not the mouse button is pressed (ie set in down unset in mouse up) then just check this variable in mouse_move
跟踪鼠标按下和鼠标抬起事件以设置一个变量，确定是否按下鼠标按钮（即设置为向下未设置鼠标向上）然后只需在 mouse_move 中检查此变量
see http://msdn.microsoft.com/en-us/library/system.windows.forms.control.mousebuttons.aspxfor an example
有关示例，请参见http://msdn.microsoft.com/en-us/library/system.windows.forms.control.mousebuttons.aspx
回答by Tigran
Use
用
private void OnMouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
}
}
like this and in second ifyou will have a condition when your mosue moved andmouse Leftbutton is down.
像这样，然后if当您的鼠标移动并且鼠标左键按下时，您将有一个条件。
