設定或傳回指派給驗證準則的規則運算式。預設值是空字串 ("")。
public string ValidationExpression {
get,
set
}
例外狀況
| 例外狀況類型 | 條件 |
|---|---|
| HttpException | 指派的規則運算式不正確。 |
範例
下列範例示範如何使用 ValidationExpression 屬性設定電子郵件位址、電話號碼和 URL 的驗證運算式。
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' e-mail address validation
revEmail.ValidationExpression = "\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"
' telephone number validation
revPhone.ValidationExpression = "((\(\d{3}\) ?)|(\d{3}-))?\d{3}-\d{4}"
'/ URL validation
revURL.ValidationExpression = "http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?"
End Sub
[C#]
void Page_Load(Object sender, EventArgs e)
{
// e-mail address validation
revEmail.ValidationExpression =
"\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*";
// telephone number validation
revPhone.ValidationExpression =
"((\\(\\d{3}\\) ?)|(\\d{3}-))?\\d{3}-\\d{4}";
/// URL validation
revURL.ValidationExpression =
"http://([\\w-]+\\.)+[\\w-]+(/[\\w- ./?%&=]*)?";
}