MetaColumn Class
Represents a database column that is used by Dynamic Data.
Assembly: System.Web.DynamicData (in System.Web.DynamicData.dll)
System.Web.DynamicData::MetaColumn
System.Web.DynamicData::MetaChildrenColumn
System.Web.DynamicData::MetaForeignKeyColumn
| Name | Description | |
|---|---|---|
 | MetaColumn(MetaTable^, ColumnProvider^) | Initializes a new instance of the MetaColumn class. |
| Name | Description | |
|---|---|---|
 | 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. |
| Name | Description | |
|---|---|---|
 | BuildAttributeCollection() | Gets the attribute collection. |
| Equals(Object^) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
| Finalize() | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.) |
| GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
| GetType() | |
| Initialize() | Initializes data that might not be available when the constructor is called. |
| MemberwiseClone() | |
| ResetMetadata() | Clears cached column metadata. |
| ToString() | Gets the data field name.(Overrides Object::ToString().) |
| Name | Description | |
|---|---|---|
| ConvertEditedValue(String^) | Returns the value provided by a user for a control that is being validated.(Defined by DynamicDataExtensions.) |
| FormatEditValue(Object^) | Formats the specified field value by using the specified formatting options.(Defined by DynamicDataExtensions.) |
| FormatValue(Object^) | Formats the specified field value by using the specified formatting options.(Defined by DynamicDataExtensions.) |
| GetEnumType() | Gets the type of the enumeration that represents the column.(Defined by DynamicDataExtensions.) |
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.
Available since 3.5
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.