MetaColumn Class

Definition

Namespace:

System.Web.DynamicData

Assembly:

System.Web.DynamicData.dll

Represents a database column that is used by Dynamic Data.

public ref class MetaColumn : System::Web::DynamicData::IFieldFormattingOptions

public class MetaColumn : System.Web.DynamicData.IFieldFormattingOptions

type MetaColumn = class
    interface IFieldFormattingOptions

Public Class MetaColumn
Implements IFieldFormattingOptions

Inheritance

Object

MetaColumn

Derived

System.Web.DynamicData.MetaChildrenColumn

System.Web.DynamicData.MetaForeignKeyColumn

Implements

IFieldFormattingOptions

Remarks

In ASP.NET Dynamic Data applications, the MetaColumn class represents a database field. The MetaColumn class lets you retrieve information about the data field such as type and metadata information.

You can retrieve the table that the data field belongs to by using the Table property. You can also retrieve the data model by using the Model property.

Constructors

MetaColumn(MetaTable, ColumnProvider)

Initializes a new instance of the MetaColumn class.

Properties

AllowInitialValue	Gets or sets a value that specifies whether a column enables a value to be inserted.
ApplyFormatInEditMode	Gets a value that indicates whether the formatting string specified by the DataFormatString property is applied to field values when the data-bound control that contains the data field that is represented by the MetaColumn object is in edit mode.
Attributes	Gets the collection of metadata attributes that apply to the data field represented by the MetaColumn object.
ColumnType	Gets the data field type.
ConvertEmptyStringToNull	Gets a value that indicates whether empty string values ("") are automatically converted to null values when the data field is updated in the data source.
DataFormatString	Gets the string that specifies the display format for the field value.
DataTypeAttribute	Gets the DataTypeAttribute attribute that is applied to the data field.
DefaultValue	Gets the default value for the data field.
Description	Gets the description for the data field.
DisplayName	Gets the display name for the data field.
EntityTypeProperty	Gets an object that contains attributes of the property that represents the data field in the entity type.
FilterUIHint	Gets the FilterUIHint value that is used for the column.
HtmlEncode	Gets a value that indicates whether field values are HTML-encoded before they are displayed in a data-bound control.
IsBinaryData	Gets a value that indicates whether the data field contains binary data.
IsCustomProperty	Gets a value that indicates whether the data field exists in the database.
IsFloatingPoint	Gets a value that indicates whether the data field is a floating-point type.
IsForeignKeyComponent	Gets a value that indicates whether the data field is part of a foreign key.
IsGenerated	Gets a value that indicates whether the data field value is automatically generated in the database.
IsInteger	Gets a value that indicates whether the data field type is an integer type.
IsLongString	Gets a value that indicates whether the data field type can contain long strings.
IsPrimaryKey	Gets a value that indicates whether the data field is part of the table's primary key.
IsReadOnly	Gets a value that indicates whether the data field is read-only.
IsRequired	Gets a value that indicates whether the data field requires a value.
IsString	Gets a value that indicates whether the data field type is a string type.
MaxLength	Gets a value that indicates the maximum length of data that can be stored in the data field.
Model	Gets the MetaModel object that represents the data model that this data field belongs to.
Name	Gets the name of the data field.
NullDisplayText	Gets the caption that is displayed for a field when the field's value is null.
Prompt	Gets a value that can be used as a watermark in the UI that is bound to data in the column.
Provider	Gets the abstraction provider object that is used to generate the MetaColumn object.
RequiredErrorMessage	Gets the error message that is displayed when the data field requires a value but its value is empty.
Scaffold	Gets a value that indicates whether the data field should be displayed.
ShortDisplayName	Gets the short name for the column.
SortExpression	Gets the expression that is used to determine the sort order for the data field.
Table	Gets the MetaTable object that represents the table that the data field belongs to.
TypeCode	Gets the type of the data field.
UIHint	Gets the name of the field template specified for the data field.

Methods

BuildAttributeCollection()	Gets the attribute collection.
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
Initialize()	Initializes data that might not be available when the constructor is called.
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ResetMetadata()	Clears cached column metadata.
ToString()	Gets the data field name.

Extension Methods

ConvertEditedValue(IFieldFormattingOptions, String)	Returns the value provided by a user for a control that is being validated.
FormatEditValue(IFieldFormattingOptions, Object)	Formats the specified field value by using the specified formatting options.
FormatValue(IFieldFormattingOptions, Object)	Formats the specified field value by using the specified formatting options.
GetEnumType(MetaColumn)	Gets the type of the enumeration that represents the column.

See also

• MetaChildrenColumn
• MetaForeignKeyColumn
• ASP.NET Dynamic Data Overview