如何在顯示錯誤後隱藏錯誤提供程序？

Question

我有一個問題，也許有人幫助我。你知道在這個程序中如何做出錯誤之後如何去除圖標「error provider」消失，如果沒有更多的錯誤，但是它出現了嗎？ （請原諒我的語法錯誤）

bool IsValidated = true; //will be checked on button click 
void dateTimePicker1_Validating(object sender, CancelEventArgs e) 

{ DateTimePicker datetimepicker = sender as DateTimePicker; 

if (datetimepicker.Value == null) 

{ errorProvider1.SetError(datetimepicker, "Required"); 
    IsValidated = false; 
} } 
void comboBox_Validating(object sender, CancelEventArgs e) 

{ 
    ComboBox combo = sender as ComboBox; 
    if(combo.SelectedIndex == -1) 
{ 
    errorProvider1.SetError(combo, "Required"); 
    IsValidated = false; 
}} 

void textBox_Validating(object sender, CancelEventArgs e) 
{ 
    TextBox txtbox = sender as TextBox; 
    if (txtbox.Text == "" || txtbox.Text.Length > 2) 
{ 
    errorProvider1.SetError(txtbox, "Required"); 
    IsValidated = false; 
}} 

Answer 1

https://msdn.microsoft.com/en-us/library/system.windows.forms.errorprovider.seterror%28v=vs.110%29.aspx

與空呼叫SETERROR清除錯誤。

if (datetimepicker.Value == null) 
{ 
    errorProvider1.SetError(datetimepicker, "Required"); 
    IsValidated = false; 
} 
else 
{ 
    errorProvider1.SetError(datetimepicker, null); 
}