C#停止,直到按下按钮
本文关键字:按钮 停止 | 更新日期: 2023-09-27 18:21:24
我正在c#中构建一个计算器。我想停止计算器并发出错误声音,直到按下清除按钮。就像计算平方根时,数字是-ve。
这是计算平方根的部分
private void buttonSquareRoot_Click(object sender, EventArgs e)
{
num1 = double.Parse(textBox1.Text);
if (num1 < 0.0)
{
textBox1.Text = "Invalid Input";
}
else
{
result = Math.Sqrt(double.Parse(textBox1.Text));
textBox1.Text = Convert.ToString(result);
}
}
在错误消息后,我希望程序停止,直到点击清除按钮。我已经弄清楚了这个按钮。
private void buttonClear_Click(object sender, EventArgs e)
{
textBox1.Text = "";
}
您可以禁用所有需要的按钮,直到再次需要为止。
void SetControlsAbility(bool isEnabled)
{
// for every control you need:
yourControl.Enabled = isEnabled;
}
然后
private void buttonSquareRoot_Click(object sender, EventArgs e)
{
num1 = double.Parse(textBox1.Text);
if (num1 < 0.0)
{
textBox1.Text = "Invalid Input";
SetControlsAbility(false);
}
else
{
result = Math.Sqrt(double.Parse(textBox1.Text));
textBox1.Text = Convert.ToString(result);
}
}
和
private void buttonClear_Click(object sender, EventArgs e)
{
textBox1.Text = "";
SetControlsAbility(true);
}
private void buttonSquareRoot_Click(object sender, EventArgs e)
{
num1 = double.Parse(textBox1.Text);
if (num1 < 0.0)
{
textBox1.Text = "Invalid Input";
**buttonSquareRoot.Enabled = False;**
}
else
{
result = Math.Sqrt(double.Parse(textBox1.Text));
textBox1.Text = Convert.ToString(result);
}
}
private void buttonClear_Click(object sender, EventArgs e)
{
textBox1.Text = "";
buttonSquareRoot.Enabled = True;
}