本文整理匯總了C#中System.Windows.Forms.TextBoxBase.Clear方法的典型用法代碼示例。如果您正苦於以下問題：C# TextBoxBase.Clear方法的具體用法？C# TextBoxBase.Clear怎麽用？C# TextBoxBase.Clear使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Windows.Forms.TextBoxBase的用法示例。
在下文中一共展示了TextBoxBase.Clear方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: MyTextChangedHandler
private bool flag;
private void MyTextChangedHandler(System.Object sender, System.EventArgs e)
{
long val;
// Check the flag to prevent code re-entry.
if(flag == false)
{
// Set the flag to True to prevent re-entry of the code below.
flag = true;
// Determine if the text of the control is a number.
try {
// Attempt to convert to long
val = System.Convert.ToInt64(textBox1.Text);
}
catch {
// Display a message box and clear the contents if not a number.
MessageBox.Show("The text is not a valid number. Please re-enter");
// Clear the contents of the text box to allow re-entry.
textBox1.Clear();
}
// Reset the flag so other TextChanged events are processed correctly.
flag = false;
}
}