MessageBoxButtons 枚举
定义
重要
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指定若干常数，用以定义 MessageBox 上将显示哪些按钮
public enum class MessageBoxButtonspublic enum MessageBoxButtonstype MessageBoxButtons = Public Enum MessageBoxButtons- 继承
字段
| 名称 | 值 | 说明 |
|---|---|---|
| AbortRetryIgnore | 2 | 消息框包含“中止”、“重试”和“忽略”按钮。 |
| CancelTryContinue | 6 | 指定消息框包含“取消”、“重试”和“继续”按钮。 |
| OK | 0 | 消息框包含“确定”按钮。 |
| OKCancel | 1 | 消息框包含“确定”和“取消”按钮。 |
| RetryCancel | 5 | 消息框包含“重试”和“取消”按钮。 |
| YesNo | 4 | 消息框包含“是”和“否”按钮。 |
| YesNoCancel | 3 | 消息框包含“是”、“否”和“取消”按钮。 |
示例
下面的代码示例演示如何使用 MessageBox 来为用户提供阻止窗体关闭的机会。 此示例要求从 FormClosing 窗体的 事件调用 方法。
private:
void Form1_FormClosing(Object^ sender, FormClosingEventArgs^ e)
{
// If the no button was pressed ...
if ((MessageBox::Show(
"Are you sure that you would like to close the form?",
"Form Closing", MessageBoxButtons::YesNo,
MessageBoxIcon::Question) == DialogResult::No))
{
// cancel the closure of the form.
e->Cancel = true;
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
const string message =
"Are you sure that you would like to close the form?";
const string caption = "Form Closing";
var result = MessageBox.Show(message, caption,
MessageBoxButtons.YesNo,
MessageBoxIcon.Question);
// If the no button was pressed ...
if (result == DialogResult.No)
{
// cancel the closure of the form.
e.Cancel = true;
}
}
Private Sub Form1_FormClosing( _
ByVal sender As System.Object, _
ByVal e As System.Windows.Forms.FormClosingEventArgs) _
Handles MyBase.FormClosing
Dim message As String = _
"Are you sure that you would like to close the form?"
Dim caption As String = "Form Closing"
Dim result = MessageBox.Show(message, caption, _
MessageBoxButtons.YesNo, _
MessageBoxIcon.Question)
' If the no button was pressed ...
If (result = DialogResult.No) Then
' cancel the closure of the form.
e.Cancel = True
End If
End Sub
注解
此枚举由 MessageBox 类使用。
