c# WinForm 单击X 关闭时,给出选择提示！是否关闭? 是：关闭 否：不关闭

Question

如题：c# WinForm 单击X 关闭时,给出选择提示！是否关闭? 是：关闭 否：不关闭

Answer 1

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (MessageBox.Show("是否关闭?", "提示", MessageBoxButtons.YesNo) == DialogResult.No)
{
e.Cancel = true;
}
else
{
e.Cancel = false;
}
}

Answer 2

1.MessageBox.Show("Hello~~~~");最简单的，只显示提示信息。2.MessageBox.Show("There are something wrong!","ERROR");可以给消息框加上标题。3.if (MessageBox.Show("Delete this user?", "Confirm Message", MessageBoxButtons.OKCancel) == DialogResult.OK){//delete}询问是否删除时会用到这个。4.if (MessageBox.Show("Delete this user?", "Confirm Message", MessageBoxButtons.OKCancel,MessageBoxIcon.Question) == DialogResult.OK){//delete}可以给MessageBox加上一个Icon，.net提供常见的Icon共选择。5.if (MessageBox.Show("Delete this user?", "Confirm Message", MessageBoxButtons.OKCancel, MessageBoxIcon.Question,MessageBoxDefaultButton.Button2) == DialogResult.OK){//delete}可以改变MessageBox的默认焦点，如下：6.if (MessageBox.Show("Delete this user?", "Confirm Message", MessageBoxButtons.OKCancel, MessageBoxIcon.Question,MessageBoxDefaultButton.Button2,MessageBoxOptions.RtlReading) == DialogResult.OK){//delete}反向显示：7.if (MessageBox.Show("Delete this user?", "Confirm Message", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2, MessageBoxOptions.RightAlign,true) == DialogResult.OK){//delete}