ColumnTypeConverter.cs source code in C# .NET

                        
Code:
                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / ColumnTypeConverter.cs / 1305376 / ColumnTypeConverter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
// [....] 
//----------------------------------------------------------------------------- 

/* 
 */
namespace System.Data {
    using System.ComponentModel;
    using System.ComponentModel.Design.Serialization; 
    using System.Diagnostics;
    using System.Globalization; 
    using System.Data.SqlTypes; 

    ///  
    ///    Provides a type
    ///       converter that can be used to populate a list box with available types.
    /// 
    internal sealed class ColumnTypeConverter : TypeConverter { 
        private static Type[] types = new Type[] {
            typeof(Boolean), 
            typeof(Byte), 
            typeof(Byte[]),
            typeof(Char), 
            typeof(DateTime),
            typeof(Decimal),
            typeof(Double),
            typeof(Guid), 
            typeof(Int16),
            typeof(Int32), 
            typeof(Int64), 
            typeof(object),
            typeof(SByte), 
            typeof(Single),
            typeof(string),
            typeof(TimeSpan),
            typeof(UInt16), 
            typeof(UInt32),
            typeof(UInt64), 
            typeof(SqlInt16), 
            typeof(SqlInt32),
            typeof(SqlInt64), 
            typeof(SqlDecimal),
            typeof(SqlSingle),
            typeof(SqlDouble),
            typeof(SqlString), 
            typeof(SqlBoolean),
            typeof(SqlBinary), 
            typeof(SqlByte), 
            typeof(SqlDateTime),
            typeof(SqlGuid), 
            typeof(SqlMoney),
            typeof(SqlBytes),
            typeof(SqlChars),
            typeof(SqlXml) 
        };
        private StandardValuesCollection values; 
 
        // converter classes should have public ctor
        public ColumnTypeConverter() { 
        }

        /// 
        ///    Gets a value indicating whether this converter can 
        ///       convert an object to the given destination type using the context.
        ///  
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { 
            if (destinationType == typeof(InstanceDescriptor)) {
                return true; 
            }
            return base.CanConvertTo(context, destinationType);
        }
 
        /// 
        ///    Converts the given value object to the specified destination type. 
        ///  
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
            if (destinationType == null) { 
                throw new ArgumentNullException("destinationType");
            }

            if (destinationType == typeof(string)) { 
                if (value == null) {
                    return String.Empty; 
                } 
                else {
                    value.ToString(); 
                }
            }
            if (value != null && destinationType == typeof(InstanceDescriptor)) {
                Object newValue = value; 
                if (value is string) {
                    for (int i = 0; i < types.Length; i++) { 
                        if (types[i].ToString().Equals(value)) 
                            newValue = types[i];
                    } 
                }

                if (value is Type || value is string) {
                    System.Reflection.MethodInfo method = typeof(Type).GetMethod("GetType", new Type[] {typeof(string)}); // change done for security review 
                    if (method != null) {
                        return new InstanceDescriptor(method, new object[] {((Type)newValue).AssemblyQualifiedName}); 
                    } 
                }
            } 

            return base.ConvertTo(context, culture, value, destinationType);
        }
 
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
            if (sourceType == typeof(string)) { 
                return true; 
            }
            return base.CanConvertTo(context, sourceType); 
        }

        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
            if (value != null && value.GetType() == typeof(string)) { 
                for (int i = 0; i < types.Length; i++) {
                    if (types[i].ToString().Equals(value)) 
                        return types[i]; 
                }
 
                return typeof(string);
            }

            return base.ConvertFrom(context, culture, value); 
        }
 
        ///  
        ///    Gets a collection of standard values for the data type this validator is
        ///       designed for. 
        /// 
        public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) {
            if (values == null) {
                object[] objTypes; 

                if (types != null) { 
                    objTypes = new object[types.Length]; 
                    Array.Copy(types, objTypes, types.Length);
                } 
                else {
                    objTypes = null;
                }
 
                values = new StandardValuesCollection(objTypes);
            } 
            return values; 
        }
 
        /// 
        ///    Gets a value indicating whether the list of standard values returned from
        ///     is an exclusive list. 
        ///  
        public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) {
            return true; 
        } 

        ///  
        ///    Gets a value indicating whether this object supports a
        ///       standard set of values that can be picked from a list using the specified
        ///       context.
        ///  
        public override bool GetStandardValuesSupported(ITypeDescriptorContext context) {
            return true; 
        } 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
// [....] 
//----------------------------------------------------------------------------- 

/* 
 */
namespace System.Data {
    using System.ComponentModel;
    using System.ComponentModel.Design.Serialization; 
    using System.Diagnostics;
    using System.Globalization; 
    using System.Data.SqlTypes; 

    ///  
    ///    Provides a type
    ///       converter that can be used to populate a list box with available types.
    /// 
    internal sealed class ColumnTypeConverter : TypeConverter { 
        private static Type[] types = new Type[] {
            typeof(Boolean), 
            typeof(Byte), 
            typeof(Byte[]),
            typeof(Char), 
            typeof(DateTime),
            typeof(Decimal),
            typeof(Double),
            typeof(Guid), 
            typeof(Int16),
            typeof(Int32), 
            typeof(Int64), 
            typeof(object),
            typeof(SByte), 
            typeof(Single),
            typeof(string),
            typeof(TimeSpan),
            typeof(UInt16), 
            typeof(UInt32),
            typeof(UInt64), 
            typeof(SqlInt16), 
            typeof(SqlInt32),
            typeof(SqlInt64), 
            typeof(SqlDecimal),
            typeof(SqlSingle),
            typeof(SqlDouble),
            typeof(SqlString), 
            typeof(SqlBoolean),
            typeof(SqlBinary), 
            typeof(SqlByte), 
            typeof(SqlDateTime),
            typeof(SqlGuid), 
            typeof(SqlMoney),
            typeof(SqlBytes),
            typeof(SqlChars),
            typeof(SqlXml) 
        };
        private StandardValuesCollection values; 
 
        // converter classes should have public ctor
        public ColumnTypeConverter() { 
        }

        /// 
        ///    Gets a value indicating whether this converter can 
        ///       convert an object to the given destination type using the context.
        ///  
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { 
            if (destinationType == typeof(InstanceDescriptor)) {
                return true; 
            }
            return base.CanConvertTo(context, destinationType);
        }
 
        /// 
        ///    Converts the given value object to the specified destination type. 
        ///  
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
            if (destinationType == null) { 
                throw new ArgumentNullException("destinationType");
            }

            if (destinationType == typeof(string)) { 
                if (value == null) {
                    return String.Empty; 
                } 
                else {
                    value.ToString(); 
                }
            }
            if (value != null && destinationType == typeof(InstanceDescriptor)) {
                Object newValue = value; 
                if (value is string) {
                    for (int i = 0; i < types.Length; i++) { 
                        if (types[i].ToString().Equals(value)) 
                            newValue = types[i];
                    } 
                }

                if (value is Type || value is string) {
                    System.Reflection.MethodInfo method = typeof(Type).GetMethod("GetType", new Type[] {typeof(string)}); // change done for security review 
                    if (method != null) {
                        return new InstanceDescriptor(method, new object[] {((Type)newValue).AssemblyQualifiedName}); 
                    } 
                }
            } 

            return base.ConvertTo(context, culture, value, destinationType);
        }
 
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
            if (sourceType == typeof(string)) { 
                return true; 
            }
            return base.CanConvertTo(context, sourceType); 
        }

        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
            if (value != null && value.GetType() == typeof(string)) { 
                for (int i = 0; i < types.Length; i++) {
                    if (types[i].ToString().Equals(value)) 
                        return types[i]; 
                }
 
                return typeof(string);
            }

            return base.ConvertFrom(context, culture, value); 
        }
 
        ///  
        ///    Gets a collection of standard values for the data type this validator is
        ///       designed for. 
        /// 
        public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) {
            if (values == null) {
                object[] objTypes; 

                if (types != null) { 
                    objTypes = new object[types.Length]; 
                    Array.Copy(types, objTypes, types.Length);
                } 
                else {
                    objTypes = null;
                }
 
                values = new StandardValuesCollection(objTypes);
            } 
            return values; 
        }
 
        /// 
        ///    Gets a value indicating whether the list of standard values returned from
        ///     is an exclusive list. 
        ///  
        public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) {
            return true; 
        } 

        ///  
        ///    Gets a value indicating whether this object supports a
        ///       standard set of values that can be picked from a list using the specified
        ///       context.
        ///  
        public override bool GetStandardValuesSupported(ITypeDescriptorContext context) {
            return true; 
        } 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

                        

                        

                        
                        

Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK

• WindowsAuthenticationModule.cs
• ExecutionEngineException.cs
• ResourceContainer.cs
• SafeSystemMetrics.cs
• EdmError.cs
• ProtocolReflector.cs
• XmlSchemaValidator.cs
• SchemaLookupTable.cs
• TableItemPatternIdentifiers.cs
• NativeConfigurationLoader.cs
• PropertyInformationCollection.cs
• ReadOnlyCollectionBase.cs
• BehaviorEditorPart.cs
• ItemMap.cs
• _NetworkingPerfCounters.cs
• New.cs
• StrongNameKeyPair.cs
• SafeLibraryHandle.cs
• LinqDataSourceEditData.cs
• Invariant.cs
• SqlGatherProducedAliases.cs
• HierarchicalDataBoundControlAdapter.cs
• FilterQueryOptionExpression.cs
• CultureMapper.cs
• ListDataBindEventArgs.cs
• CodeMethodReturnStatement.cs
• MailDefinitionBodyFileNameEditor.cs
• TextDecorationUnitValidation.cs
• RelOps.cs
• MatrixUtil.cs
• ObjectReaderCompiler.cs
• BypassElement.cs
• PreservationFileWriter.cs
• SqlConnection.cs
• Track.cs
• Types.cs
• ServicePointManagerElement.cs
• SettingsProperty.cs
• ViewEventArgs.cs
• FlowLayoutPanel.cs
• ExeContext.cs
• AlignmentXValidation.cs
• ListViewVirtualItemsSelectionRangeChangedEvent.cs
• MarshalDirectiveException.cs
• ExpressionDumper.cs
• TrustSection.cs
• XamlParser.cs
• ArrayElementGridEntry.cs
• PolicyImporterElement.cs
• PropertyChangedEventArgs.cs
• RightsManagementEncryptionTransform.cs
• ValueType.cs
• SerializationInfoEnumerator.cs
• MenuStrip.cs
• ExtensibleClassFactory.cs
• SessionEndedEventArgs.cs
• QuaternionAnimation.cs
• WeakReferenceList.cs
• SolidBrush.cs
• SafeNativeMemoryHandle.cs
• CodeDOMProvider.cs
• PathSegmentCollection.cs
• GridViewRow.cs
• X509CertificateClaimSet.cs
• CompleteWizardStep.cs
• HtmlInputCheckBox.cs
• AvtEvent.cs
• ClientUtils.cs
• TailPinnedEventArgs.cs
• ClientUrlResolverWrapper.cs
• DataGridPagingPage.cs
• EndOfStreamException.cs
• DetailsViewPagerRow.cs
• ValidationResult.cs
• XmlName.cs
• OciLobLocator.cs
• HttpBrowserCapabilitiesWrapper.cs
• DbConnectionInternal.cs
• TreeNodeBinding.cs
• TimeZone.cs
• Guid.cs
• AppDomainProtocolHandler.cs
• PathFigureCollection.cs
• DependencyObjectCodeDomSerializer.cs
• Claim.cs
• SparseMemoryStream.cs
• Point3DAnimationUsingKeyFrames.cs
• Query.cs
• mediapermission.cs
• DefaultAuthorizationContext.cs
• ExpressionBuilderContext.cs
• _Semaphore.cs
• ToolStripRenderEventArgs.cs
• WebPartCatalogAddVerb.cs
• DbExpressionVisitor_TResultType.cs
• DbMetaDataColumnNames.cs
• ArrayList.cs
• DataGridViewImageCell.cs
• Matrix.cs
• Rijndael.cs