RegularExpressionAttribute(String) Constructor
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Initializes a new instance of the RegularExpressionAttribute class.
public:
RegularExpressionAttribute(System::String ^ pattern);
public RegularExpressionAttribute (string pattern);
new System.ComponentModel.DataAnnotations.RegularExpressionAttribute : string -> System.ComponentModel.DataAnnotations.RegularExpressionAttribute
Public Sub New (pattern As String)
Parameters
- pattern
- String
The regular expression that is used to validate the data field value.
Exceptions
pattern
is null
.
Examples
The following example shows how to apply the RegularExpressionAttribute to a data field. If validation fails, the code in the example displays the validation error message that is provided by Dynamic Data.
// Allow up to 40 uppercase and lowercase
// characters. Use standard error.
[RegularExpression(@"^[a-zA-Z''-'\s]{1,40}$")]
public object LastName;
' Allow up to 40 uppercase and lowercase
' characters. Use standard error.
<RegularExpression("^[a-zA-Z''-'\s]{1,40}$")> _
Public LastName As Object
Applies to
意見反應
https://aka.ms/ContentUserFeedback。
即將登場:在 2024 年,我們將逐步淘汰 GitHub 問題作為內容的意見反應機制,並將它取代為新的意見反應系統。 如需詳細資訊,請參閱:提交並檢視相關的意見反應