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.NET Framework Class Library
DataColumnSelectionConverter Class

Provides a type converter for a property representing the field name of a bound column field in a GridView control.

Inheritance Hierarchy
SystemObject
   System.ComponentModelTypeConverter
    System.Web.UI.DesignDataColumnSelectionConverter

Namespace:   System.Web.UI.Design
Assembly:  System.Design (in System.Design.dll)
Syntax
<[%$TOPIC/eet1ec7f_en-us_VS_110_3_0_0_0_0%]([%$TOPIC/eet1ec7f_en-us_VS_110_3_0_0_0_1%].Demand, Flags := [%$TOPIC/eet1ec7f_en-us_VS_110_3_0_0_0_2%].UnmanagedCode)> _
Public Class DataColumnSelectionConverter _
	Inherits [%$TOPIC/eet1ec7f_en-us_VS_110_3_0_0_0_3%]
[[%$TOPIC/eet1ec7f_en-us_VS_110_3_0_1_0_0%]([%$TOPIC/eet1ec7f_en-us_VS_110_3_0_1_0_1%].Demand, Flags = [%$TOPIC/eet1ec7f_en-us_VS_110_3_0_1_0_2%].UnmanagedCode)]
public class DataColumnSelectionConverter : [%$TOPIC/eet1ec7f_en-us_VS_110_3_0_1_0_3%]
[[%$TOPIC/eet1ec7f_en-us_VS_110_3_0_2_0_0%]([%$TOPIC/eet1ec7f_en-us_VS_110_3_0_2_0_1%]::Demand, Flags = [%$TOPIC/eet1ec7f_en-us_VS_110_3_0_2_0_2%]::UnmanagedCode)]
public ref class DataColumnSelectionConverter : public [%$TOPIC/eet1ec7f_en-us_VS_110_3_0_2_0_3%]
[<[%$TOPIC/eet1ec7f_en-us_VS_110_3_0_3_0_0%]([%$TOPIC/eet1ec7f_en-us_VS_110_3_0_3_0_1%].Demand, Flags = [%$TOPIC/eet1ec7f_en-us_VS_110_3_0_3_0_2%].UnmanagedCode)>]
type DataColumnSelectionConverter =  
    class 
        inherit [%$TOPIC/eet1ec7f_en-us_VS_110_3_0_3_0_3%] 
    end

The DataColumnSelectionConverter type exposes the following members.

Constructors
  NameDescription
Public method DataColumnSelectionConverterInitializes a new instance of the DataColumnSelectionConverter class.
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Methods
  NameDescription
Public method CanConvertFrom(Type)Returns whether this converter can convert an object of the given type to the type of this converter. (Inherited from TypeConverter.)
Public method CanConvertFrom(ITypeDescriptorContext, Type)Indicates whether the specified source type can be converted to the type of the associated control property. (Overrides TypeConverterCanConvertFrom(ITypeDescriptorContext, Type).)
Public method CanConvertTo(Type)Returns whether this converter can convert the object to the specified type. (Inherited from TypeConverter.)
Public method CanConvertTo(ITypeDescriptorContext, Type)Returns whether this converter can convert the object to the specified type, using the specified context. (Inherited from TypeConverter.)
Public method ConvertFrom(Object)Converts the given value to the type of this converter. (Inherited from TypeConverter.)
Public method ConvertFrom(ITypeDescriptorContext, CultureInfo, Object)Converts the specified object to the type of the associated control property. (Overrides TypeConverterConvertFrom(ITypeDescriptorContext, CultureInfo, Object).)
Public method ConvertFromInvariantString(String)Converts the given string to the type of this converter, using the invariant culture. (Inherited from TypeConverter.)
Public method ConvertFromInvariantString(ITypeDescriptorContext, String)Converts the given string to the type of this converter, using the invariant culture and the specified context. (Inherited from TypeConverter.)
Public method ConvertFromString(String)Converts the specified text to an object. (Inherited from TypeConverter.)
Public method ConvertFromString(ITypeDescriptorContext, String)Converts the given text to an object, using the specified context. (Inherited from TypeConverter.)
Public method ConvertFromString(ITypeDescriptorContext, CultureInfo, String)Converts the given text to an object, using the specified context and culture information. (Inherited from TypeConverter.)
Public method ConvertTo(Object, Type)Converts the given value object to the specified type, using the arguments. (Inherited from TypeConverter.)
Public method ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type)Converts the given value object to the specified type, using the specified context and culture information. (Inherited from TypeConverter.)
Public method ConvertToInvariantString(Object)Converts the specified value to a culture-invariant string representation. (Inherited from TypeConverter.)
Public method ConvertToInvariantString(ITypeDescriptorContext, Object)Converts the specified value to a culture-invariant string representation, using the specified context. (Inherited from TypeConverter.)
Public method ConvertToString(Object)Converts the specified value to a string representation. (Inherited from TypeConverter.)
Public method ConvertToString(ITypeDescriptorContext, Object)Converts the given value to a string representation, using the given context. (Inherited from TypeConverter.)
Public method ConvertToString(ITypeDescriptorContext, CultureInfo, Object)Converts the given value to a string representation, using the specified context and culture information. (Inherited from TypeConverter.)
Public method CreateInstance(IDictionary)Re-creates an Object given a set of property values for the object. (Inherited from TypeConverter.)
Public method 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.)
Public method Equals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected method FinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Protected method GetConvertFromExceptionReturns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter.)
Protected method GetConvertToExceptionReturns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter.)
Public method GetCreateInstanceSupportedReturns whether changing a value on this object requires a call to the CreateInstance method to create a new value. (Inherited from TypeConverter.)
Public method GetCreateInstanceSupported(ITypeDescriptorContext)Returns whether changing a value on this object requires a call to CreateInstance to create a new value, using the specified context. (Inherited from TypeConverter.)
Public method GetHashCodeServes as the default hash function. (Inherited from Object.)
Public method GetProperties(Object)Returns a collection of properties for the type of array specified by the value parameter. (Inherited from TypeConverter.)
Public method 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.)
Public method 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.)
Public method GetPropertiesSupportedReturns whether this object supports properties. (Inherited from TypeConverter.)
Public method GetPropertiesSupported(ITypeDescriptorContext)Returns whether this object supports properties, using the specified context. (Inherited from TypeConverter.)
Public method GetStandardValuesReturns a collection of standard values from the default context for the data type this type converter is designed for. (Inherited from TypeConverter.)
Public method GetStandardValues(ITypeDescriptorContext)Returns a list of available values that can be assigned to the associated control property. (Overrides TypeConverterGetStandardValues(ITypeDescriptorContext).)
Public method GetStandardValuesExclusiveReturns whether the collection of standard values returned from GetStandardValues is an exclusive list. (Inherited from TypeConverter.)
Public method GetStandardValuesExclusive(ITypeDescriptorContext)Indicates whether this converter returns a list containing all possible values that can be assigned to the associated control property. (Overrides TypeConverterGetStandardValuesExclusive(ITypeDescriptorContext).)
Public method GetStandardValuesSupportedReturns whether this object supports a standard set of values that can be picked from a list. (Inherited from TypeConverter.)
Public method GetStandardValuesSupported(ITypeDescriptorContext)Indicates whether this converter returns a set of available values for assignment to a control property, within the specified context. (Overrides TypeConverterGetStandardValuesSupported(ITypeDescriptorContext).)
Public method GetTypeGets the Type of the current instance. (Inherited from Object.)
Public method IsValid(Object)Returns whether the given value object is valid for this type. (Inherited from TypeConverter.)
Public method IsValid(ITypeDescriptorContext, Object)Returns whether the given value object is valid for this type and for the specified context. (Inherited from TypeConverter.)
Protected method MemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Protected method SortPropertiesSorts a collection of properties. (Inherited from TypeConverter.)
Public method ToStringReturns a string that represents the current object. (Inherited from Object.)
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Remarks

Use the DataColumnSelectionConverter class to convert object types before assignment to a control property. In general, the DataColumnSelectionConverter class 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 field names for bound column fields for the current GridView control.

To support converting additional object types, derive a class from DataColumnSelectionConverter 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 DataColumnSelectionConverter class as the type converter for a control property. For example, the RowHeaderColumn property of the GridView control specifies DataColumnSelectionConverter as its type converter.

NoteNote

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.

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0
Platforms

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.