![]() The actual display character used will be the decimal symbol appropriate to the culture. This mask element behaves like the “A” element.ĭecimal placeholder. If the AsciiOnly property is set to true, the only characters it will accept are the ASCII letters a-z and A-Z. This mask element behaves like the “a” element.Īlphanumeric, optional. If the AsciiOnly property is set to true, this element behaves like the “?” element.Īlphanumeric, required. If the AsciiOnly property is set to true, this element behaves like the “L” element.Ĭharacter, optional. This mask element is equivalent to ? in regular expressions.Ĭharacter, required. Restricts input to the ASCII letters a-z and A-Z. This mask element is equivalent to in regular expressions. Plus ( ) and minus (-) signs are allowed. If this position is blank in the mask, it will be rendered as a space in the Text property. This element will accept any single digit between 0 and 9.ĭigit or space, optional. If you need to create you own format, please refer to the following table or go to the Mask Property MSDN Help Page for more details. You can access the predefined mask via the Property Pane: The designer has a useful set of predefined masks such as date time formats, phone numbers, and zip codes. You can define your own custom mask or preferably select from a predefined set using the designer. Use the Mask property to limit the textbox’s input to a specific format. This property sets the string governing the input for this control. By using a mask, you can specify the format of the input without custom validation. ![]() Use the MaskedTextBox to distinguish between proper and improper user input. Represents an enhanced text box control that supports a declarative syntax for accepting or rejecting user input. Return string.Join("\n", results.Select(x => x.User Rating: 5 / 5 Please Rate MaskedTextBox Control New ValidationContext(this, null, null), results, true) Var result = Validator.TryValidateObject(this, Var result = Validator.TryValidateProperty( Var propertyDescriptor = TypeDescriptor.GetProperties(this) ![]() There is a Validator class in which has a couple of methods which allows us to validate an object or a property of an object using validation attributes: using To bring validation attributes support to our model classes, we need to implement IDataErrorInfo. Implementing IDataErrorInfo using Data Annotations Validation Attributes ![]() Item: Gets the error message for the property with the given name.Error: Gets an error message indicating what is wrong with this object.Here is the interface definition: public interface IDataErrorInfo For example DataRowView which is the main model which is usually used in classic ADO.NET applications, has implemented IDataErrorInfo. To be able to show model errors in DataGridView or showing errors using ErrorProvider the model which you are using in data binding should implement IDataErrorInfo. The framework also supports showing error in DataGridView. To show validation errors in Windows Forms, the frame work has an ErrorProvider component. ![]() Data Annotation Validation attributes enable you to perform model validation simply by decorating class properties with validation attributes such as the Required, StringLength, RegularExpression, Range, Url, etc. In this post, I’ll show how to use Data Annotation Validation attributes to perform validation in a Windows Forms Application. ![]()
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