DataSourceViewSchemaConverter Class
Definition
Important
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Provides a type converter for a property representing a field in a data source schema.
public ref class DataSourceViewSchemaConverter : System::ComponentModel::TypeConverterpublic class DataSourceViewSchemaConverter : System.ComponentModel.TypeConvertertype DataSourceViewSchemaConverter = class
inherit TypeConverterPublic Class DataSourceViewSchemaConverter
Inherits TypeConverter- Inheritance
- Derived
Remarks
Use the DataSourceViewSchemaConverter class to convert object types before assignment to a control property. In general, the DataSourceViewSchemaConverter supports converting string object types and supplies a list of standard values available for assignment to the associated control property. The standard values collection is the list of fields in the data source schema for the current control.
To support converting additional object types, derive a class from DataSourceViewSchemaConverter and override the CanConvertFrom and ConvertFrom methods for the additional object types. To support a custom list of standard assignable values, override the GetStandardValues method.
Apply the TypeConverterAttribute attribute to specify the DataSourceViewSchemaConverter class as the type converter for a control property. For example, the SortExpression property of the DataControlField class and the DataField property of the BoundField class use the DataSourceViewSchemaConverter as the property type converter.
Note
You should never access a type converter directly. Instead, call the appropriate converter by using a TypeDescriptor object. For more information, see the examples in TypeConverter.
The GetStandardValuesSupported method indicates that the converter supports returning a list of available values through the GetStandardValues method. The GetStandardValuesExclusive method indicates that the list is not an exclusive list of possible values.
Constructors
| DataSourceViewSchemaConverter() |
Initializes a new instance of the DataSourceViewSchemaConverter class. |
Methods
| CanConvertFrom(ITypeDescriptorContext, Type) |
Indicates whether the specified source type can be converted to the type of the associated control property. |
| CanConvertFrom(Type) |
Returns whether this converter can convert an object of the given type to the type of this converter. (Inherited from TypeConverter) |
| CanConvertTo(ITypeDescriptorContext, Type) |
Returns whether this converter can convert the object to the specified type, using the specified context. (Inherited from TypeConverter) |
| CanConvertTo(Type) |
Returns whether this converter can convert the object to the specified type. (Inherited from TypeConverter) |
| ConvertFrom(ITypeDescriptorContext, CultureInfo, Object) |
Converts the specified object to the type of the associated control property. |
| ConvertFrom(Object) |
Converts the given value to the type of this converter. (Inherited from TypeConverter) |
| ConvertFromInvariantString(ITypeDescriptorContext, String) |
Converts the given string to the type of this converter, using the invariant culture and the specified context. (Inherited from TypeConverter) |
| ConvertFromInvariantString(String) |
Converts the given string to the type of this converter, using the invariant culture. (Inherited from TypeConverter) |
| ConvertFromString(ITypeDescriptorContext, CultureInfo, String) |
Converts the given text to an object, using the specified context and culture information. (Inherited from TypeConverter) |
| ConvertFromString(ITypeDescriptorContext, String) |
Converts the given text to an object, using the specified context. (Inherited from TypeConverter) |
| ConvertFromString(String) |
Converts the specified text to an object. (Inherited from TypeConverter) |
| ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type) |
Converts the given value object to the specified type, using the specified context and culture information. (Inherited from TypeConverter) |
| ConvertTo(Object, Type) |
Converts the given value object to the specified type, using the arguments. (Inherited from TypeConverter) |
| ConvertToInvariantString(ITypeDescriptorContext, Object) |
Converts the specified value to a culture-invariant string representation, using the specified context. (Inherited from TypeConverter) |
| ConvertToInvariantString(Object) |
Converts the specified value to a culture-invariant string representation. (Inherited from TypeConverter) |
| ConvertToString(ITypeDescriptorContext, CultureInfo, Object) |
Converts the given value to a string representation, using the specified context and culture information. (Inherited from TypeConverter) |
| ConvertToString(ITypeDescriptorContext, Object) |
Converts the given value to a string representation, using the given context. (Inherited from TypeConverter) |
| ConvertToString(Object) |
Converts the specified value to a string representation. (Inherited from TypeConverter) |
| CreateInstance(IDictionary) |
Re-creates an Object given a set of property values for the object. (Inherited from TypeConverter) |
| CreateInstance(ITypeDescriptorContext, IDictionary) |
Creates an instance of the type that this TypeConverter is associated with, using the specified context, given a set of property values for the object. (Inherited from TypeConverter) |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetConvertFromException(Object) |
Returns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter) |
| GetConvertToException(Object, Type) |
Returns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter) |
| GetCreateInstanceSupported() |
Returns whether changing a value on this object requires a call to the CreateInstance(IDictionary) method to create a new value. (Inherited from TypeConverter) |
| GetCreateInstanceSupported(ITypeDescriptorContext) |
Returns whether changing a value on this object requires a call to CreateInstance(IDictionary) to create a new value, using the specified context. (Inherited from TypeConverter) |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetProperties(ITypeDescriptorContext, Object) |
Returns a collection of properties for the type of array specified by the value parameter, using the specified context. (Inherited from TypeConverter) |
| GetProperties(ITypeDescriptorContext, Object, Attribute[]) |
Returns a collection of properties for the type of array specified by the value parameter, using the specified context and attributes. (Inherited from TypeConverter) |
| GetProperties(Object) |
Returns a collection of properties for the type of array specified by the value parameter. (Inherited from TypeConverter) |
| GetPropertiesSupported() |
Returns whether this object supports properties. (Inherited from TypeConverter) |
| GetPropertiesSupported(ITypeDescriptorContext) |
Returns whether this object supports properties, using the specified context. (Inherited from TypeConverter) |
| GetStandardValues() |
Returns a collection of standard values from the default context for the data type this type converter is designed for. (Inherited from TypeConverter) |
| GetStandardValues(ITypeDescriptorContext) |
Returns a list of available values that can be assigned to the associated control property. |
| GetStandardValues(ITypeDescriptorContext, Type) |
Returns a list of available values that can be assigned to the associated control property. |
| GetStandardValuesExclusive() |
Returns whether the collection of standard values returned from GetStandardValues() is an exclusive list. (Inherited from TypeConverter) |
| GetStandardValuesExclusive(ITypeDescriptorContext) |
Indicates whether this converter returns a list containing all possible values that can be assigned to the associated control property. |
| GetStandardValuesSupported() |
Returns whether this object supports a standard set of values that can be picked from a list. (Inherited from TypeConverter) |
| GetStandardValuesSupported(ITypeDescriptorContext) |
Indicates whether this converter returns a set of available values for assignment to a control property within the specified context. |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| IsValid(ITypeDescriptorContext, Object) |
Returns whether the given value object is valid for this type and for the specified context. (Inherited from TypeConverter) |
| IsValid(Object) |
Returns whether the given value object is valid for this type. (Inherited from TypeConverter) |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| SortProperties(PropertyDescriptorCollection, String[]) |
Sorts a collection of properties. (Inherited from TypeConverter) |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
