问题描述
在C#中,更改事件的控制(例如,一个的NumericUpDown)被炒鱿鱼的值是由用户直接更改,或者如果它被编程改变一些其他事件的结果。
有没有一种方法,以确定该事件是否发生作为用户输入的结果?例如,无论是手动更改NumericUpDown1中的价值,并点击按钮1,将显示价值变化。如果我只是想显示值改为如果它是通过在控制,而不是点击按钮1的结果?
上/下箭头用户点击修改 私人无效numericUpDown1_ValueChanged(对象发件人,EventArgs的)
{
的MessageBox.show(值改为);
}
私人无效button1_Click_1(对象发件人,EventArgs的)
{
numericUpDown1.Value = 3;
}
有没有好的办法做到这一点。你可以找到解决方法的具体情况,例如,
- 听的MouseDown或什么,而不是的valueChanged上的数字降下来了。
-
在设置按钮单击事件处理一个标志,将禁止该消息框无法显示。
一般来说,你应该尽量组织的方式表单,它不无论身在何处的价值得到了改变。
In C#, the Changed event for a control (say, a numericupdown) gets fired whether the value was change directly by the user or if it was changed programatically as the result of some other event.
Is there a way to determine whether the event occurred as a result of user input? For example, both manually changing the value of numericUpDown1 and clicking on button1 will display "value changed". What if I only wanted to display "value changed" if it was changed through the user clicking on the up/down arrows in the control and not as a result of clicking on button1?
private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
MessageBox.Show("value changed");
}
private void button1_Click_1(object sender, EventArgs e)
{
numericUpDown1.Value = 3;
}
There is no nice way to do it. You can find workarounds for specific cases, e.g.
- listen to MouseDown or something instead of valueChanged on the numeric drop down.
Set a flag in button click event handler that will prohibit the message box from showing.
In general you should try to organize your form in a way that it doesn't matter where the value got changed.
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