Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DLinq / Dlinq / DbConvert.cs / 1305376 / DbConvert.cs
using System.Data.Common;
using System.Data.SqlClient;
using System.Linq.Expressions;
using System.IO;
using System.Reflection;
using System.Text;
using System.Runtime.Serialization.Formatters.Binary;
using System.Linq;
using System.Collections.Generic;
using System.Collections;
using System.Diagnostics.CodeAnalysis;
namespace System.Data.Linq {
public static class DBConvert {
private static Type[] StringArg = new Type[] { typeof(string) };
[SuppressMessage("Microsoft.Design", "CA1004:GenericMethodsShouldProvideTypeParameter", Justification = "[....]: Generic parameters are required for strong-typing of the return type.")]
public static T ChangeType(object value) {
return (T)ChangeType(value, typeof(T));
}
[SuppressMessage("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily", Justification = "[....]: Cast is dependent on node type and casts do not happen unecessarily in a single code path.")]
[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification = "These issues are related to our use of if-then and case statements for node types, which adds to the complexity count however when reviewed they are easy to navigate and understand.")]
public static object ChangeType(object value, Type type) {
if (value == null)
return null;
MethodInfo mi;
Type toType = System.Data.Linq.SqlClient.TypeSystem.GetNonNullableType(type);
Type fromType = value.GetType();
if (toType.IsAssignableFrom(fromType))
return value;
if (toType == typeof(Binary)) {
if (fromType == typeof(byte[])) {
return new Binary((byte[])value);
}
else if (fromType == typeof(Guid)) {
return new Binary(((Guid)value).ToByteArray());
}
else {
BinaryFormatter formatter = new BinaryFormatter();
byte[] streamArray;
using (MemoryStream stream = new MemoryStream()) {
formatter.Serialize(stream, value);
streamArray = stream.ToArray();
}
return new Binary(streamArray);
}
}
else if (toType == typeof(byte[])) {
if (fromType == typeof(Binary)) {
return ((Binary)value).ToArray();
}
else if (fromType == typeof(Guid)) {
return ((Guid)value).ToByteArray();
}
else {
BinaryFormatter formatter = new BinaryFormatter();
byte[] returnValue;
using (MemoryStream stream = new MemoryStream()) {
formatter.Serialize(stream, value);
returnValue = stream.ToArray();
}
return returnValue;
}
}
else if (fromType == typeof(byte[])) {
if (toType == typeof(Guid)) {
return new Guid((byte[])value);
}
else {
BinaryFormatter formatter = new BinaryFormatter();
object returnValue;
using (MemoryStream stream = new MemoryStream((byte[])value)) {
returnValue = ChangeType(formatter.Deserialize(stream), toType);
}
return returnValue;
}
}
else if (fromType == typeof(Binary)) {
if (toType == typeof(Guid)) {
return new Guid(((Binary)value).ToArray());
}
else {
BinaryFormatter formatter = new BinaryFormatter();
using (MemoryStream stream = new MemoryStream(((Binary)value).ToArray(), false)) {
return ChangeType(formatter.Deserialize(stream), toType);
}
}
}
else if (toType.IsEnum) {
if (fromType == typeof(string)) {
string text = ((string)value).Trim();
return Enum.Parse(toType, text);
}
else {
return Enum.ToObject(toType, Convert.ChangeType(value, Enum.GetUnderlyingType(toType), Globalization.CultureInfo.InvariantCulture));
}
}
else if (fromType.IsEnum) {
if (toType == typeof(string)) {
return Enum.GetName(fromType, value);
}
else {
return Convert.ChangeType(Convert.ChangeType(value,
Enum.GetUnderlyingType(fromType),
Globalization.CultureInfo.InvariantCulture),
toType,
Globalization.CultureInfo.InvariantCulture);
}
}
else if (toType == typeof(TimeSpan)) {
if (fromType == typeof(string)) {
return TimeSpan.Parse(value.ToString(), Globalization.CultureInfo.InvariantCulture);
}
else if (fromType == typeof(DateTime)) {
return DateTime.Parse(value.ToString(), Globalization.CultureInfo.InvariantCulture).TimeOfDay;
}
else if (fromType == typeof(DateTimeOffset)) {
return DateTimeOffset.Parse(value.ToString(), Globalization.CultureInfo.InvariantCulture).TimeOfDay;
}
else {
return new TimeSpan((long)Convert.ChangeType(value, typeof(long), Globalization.CultureInfo.InvariantCulture));
}
}
else if (fromType == typeof(TimeSpan)) {
if (toType == typeof(string)) {
return ((TimeSpan)value).ToString("", Globalization.CultureInfo.InvariantCulture);
}
else if (toType == typeof(DateTime)) {
DateTime dt = new DateTime();
return dt.Add((TimeSpan)value);
}
else if (toType == typeof(DateTimeOffset)) {
DateTimeOffset dto = new DateTimeOffset();
return dto.Add((TimeSpan)value);
}
else {
return Convert.ChangeType(((TimeSpan)value).Ticks, toType, Globalization.CultureInfo.InvariantCulture);
}
}
else if (toType == typeof(DateTime) && fromType == typeof(DateTimeOffset)) {
return ((DateTimeOffset)value).DateTime;
}
else if (toType == typeof(DateTimeOffset) && fromType == typeof(DateTime)) {
return new DateTimeOffset((DateTime)value);
}
else if (toType == typeof(string) && !(typeof(IConvertible).IsAssignableFrom(fromType))) {
if (fromType == typeof(char[])) {
return new String((char[])value);
}
else {
return value.ToString();
}
}
else if (fromType == typeof(string)) {
if (toType == typeof(Guid)) {
return new Guid((string)value);
}
else if (toType == typeof(char[])) {
return ((String)value).ToCharArray();
}
else if (toType == typeof(System.Xml.Linq.XDocument) && (string)value == string.Empty) {
return new System.Xml.Linq.XDocument();
}
else if (!(typeof(IConvertible).IsAssignableFrom(toType)) &&
(mi = toType.GetMethod("Parse", BindingFlags.Static | BindingFlags.Public, null, StringArg, null)) != null) {
try {
return mi.Invoke(null, new object[] { value });
}
catch (TargetInvocationException t) {
throw t.GetBaseException();
}
}
else {
return Convert.ChangeType(value, toType, Globalization.CultureInfo.InvariantCulture);
}
}
else if (toType.IsGenericType && toType.GetGenericTypeDefinition() == typeof(IQueryable<>)
&& typeof(IEnumerable<>).MakeGenericType(toType.GetGenericArguments()[0]).IsAssignableFrom(fromType)
) {
return Queryable.AsQueryable((IEnumerable)value);
}
else {
try {
return Convert.ChangeType(value, toType, Globalization.CultureInfo.InvariantCulture);
} catch (InvalidCastException) {
throw Error.CouldNotConvert(fromType, toType);
}
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
using System.Data.Common;
using System.Data.SqlClient;
using System.Linq.Expressions;
using System.IO;
using System.Reflection;
using System.Text;
using System.Runtime.Serialization.Formatters.Binary;
using System.Linq;
using System.Collections.Generic;
using System.Collections;
using System.Diagnostics.CodeAnalysis;
namespace System.Data.Linq {
public static class DBConvert {
private static Type[] StringArg = new Type[] { typeof(string) };
[SuppressMessage("Microsoft.Design", "CA1004:GenericMethodsShouldProvideTypeParameter", Justification = "[....]: Generic parameters are required for strong-typing of the return type.")]
public static T ChangeType(object value) {
return (T)ChangeType(value, typeof(T));
}
[SuppressMessage("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily", Justification = "[....]: Cast is dependent on node type and casts do not happen unecessarily in a single code path.")]
[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification = "These issues are related to our use of if-then and case statements for node types, which adds to the complexity count however when reviewed they are easy to navigate and understand.")]
public static object ChangeType(object value, Type type) {
if (value == null)
return null;
MethodInfo mi;
Type toType = System.Data.Linq.SqlClient.TypeSystem.GetNonNullableType(type);
Type fromType = value.GetType();
if (toType.IsAssignableFrom(fromType))
return value;
if (toType == typeof(Binary)) {
if (fromType == typeof(byte[])) {
return new Binary((byte[])value);
}
else if (fromType == typeof(Guid)) {
return new Binary(((Guid)value).ToByteArray());
}
else {
BinaryFormatter formatter = new BinaryFormatter();
byte[] streamArray;
using (MemoryStream stream = new MemoryStream()) {
formatter.Serialize(stream, value);
streamArray = stream.ToArray();
}
return new Binary(streamArray);
}
}
else if (toType == typeof(byte[])) {
if (fromType == typeof(Binary)) {
return ((Binary)value).ToArray();
}
else if (fromType == typeof(Guid)) {
return ((Guid)value).ToByteArray();
}
else {
BinaryFormatter formatter = new BinaryFormatter();
byte[] returnValue;
using (MemoryStream stream = new MemoryStream()) {
formatter.Serialize(stream, value);
returnValue = stream.ToArray();
}
return returnValue;
}
}
else if (fromType == typeof(byte[])) {
if (toType == typeof(Guid)) {
return new Guid((byte[])value);
}
else {
BinaryFormatter formatter = new BinaryFormatter();
object returnValue;
using (MemoryStream stream = new MemoryStream((byte[])value)) {
returnValue = ChangeType(formatter.Deserialize(stream), toType);
}
return returnValue;
}
}
else if (fromType == typeof(Binary)) {
if (toType == typeof(Guid)) {
return new Guid(((Binary)value).ToArray());
}
else {
BinaryFormatter formatter = new BinaryFormatter();
using (MemoryStream stream = new MemoryStream(((Binary)value).ToArray(), false)) {
return ChangeType(formatter.Deserialize(stream), toType);
}
}
}
else if (toType.IsEnum) {
if (fromType == typeof(string)) {
string text = ((string)value).Trim();
return Enum.Parse(toType, text);
}
else {
return Enum.ToObject(toType, Convert.ChangeType(value, Enum.GetUnderlyingType(toType), Globalization.CultureInfo.InvariantCulture));
}
}
else if (fromType.IsEnum) {
if (toType == typeof(string)) {
return Enum.GetName(fromType, value);
}
else {
return Convert.ChangeType(Convert.ChangeType(value,
Enum.GetUnderlyingType(fromType),
Globalization.CultureInfo.InvariantCulture),
toType,
Globalization.CultureInfo.InvariantCulture);
}
}
else if (toType == typeof(TimeSpan)) {
if (fromType == typeof(string)) {
return TimeSpan.Parse(value.ToString(), Globalization.CultureInfo.InvariantCulture);
}
else if (fromType == typeof(DateTime)) {
return DateTime.Parse(value.ToString(), Globalization.CultureInfo.InvariantCulture).TimeOfDay;
}
else if (fromType == typeof(DateTimeOffset)) {
return DateTimeOffset.Parse(value.ToString(), Globalization.CultureInfo.InvariantCulture).TimeOfDay;
}
else {
return new TimeSpan((long)Convert.ChangeType(value, typeof(long), Globalization.CultureInfo.InvariantCulture));
}
}
else if (fromType == typeof(TimeSpan)) {
if (toType == typeof(string)) {
return ((TimeSpan)value).ToString("", Globalization.CultureInfo.InvariantCulture);
}
else if (toType == typeof(DateTime)) {
DateTime dt = new DateTime();
return dt.Add((TimeSpan)value);
}
else if (toType == typeof(DateTimeOffset)) {
DateTimeOffset dto = new DateTimeOffset();
return dto.Add((TimeSpan)value);
}
else {
return Convert.ChangeType(((TimeSpan)value).Ticks, toType, Globalization.CultureInfo.InvariantCulture);
}
}
else if (toType == typeof(DateTime) && fromType == typeof(DateTimeOffset)) {
return ((DateTimeOffset)value).DateTime;
}
else if (toType == typeof(DateTimeOffset) && fromType == typeof(DateTime)) {
return new DateTimeOffset((DateTime)value);
}
else if (toType == typeof(string) && !(typeof(IConvertible).IsAssignableFrom(fromType))) {
if (fromType == typeof(char[])) {
return new String((char[])value);
}
else {
return value.ToString();
}
}
else if (fromType == typeof(string)) {
if (toType == typeof(Guid)) {
return new Guid((string)value);
}
else if (toType == typeof(char[])) {
return ((String)value).ToCharArray();
}
else if (toType == typeof(System.Xml.Linq.XDocument) && (string)value == string.Empty) {
return new System.Xml.Linq.XDocument();
}
else if (!(typeof(IConvertible).IsAssignableFrom(toType)) &&
(mi = toType.GetMethod("Parse", BindingFlags.Static | BindingFlags.Public, null, StringArg, null)) != null) {
try {
return mi.Invoke(null, new object[] { value });
}
catch (TargetInvocationException t) {
throw t.GetBaseException();
}
}
else {
return Convert.ChangeType(value, toType, Globalization.CultureInfo.InvariantCulture);
}
}
else if (toType.IsGenericType && toType.GetGenericTypeDefinition() == typeof(IQueryable<>)
&& typeof(IEnumerable<>).MakeGenericType(toType.GetGenericArguments()[0]).IsAssignableFrom(fromType)
) {
return Queryable.AsQueryable((IEnumerable)value);
}
else {
try {
return Convert.ChangeType(value, toType, Globalization.CultureInfo.InvariantCulture);
} catch (InvalidCastException) {
throw Error.CouldNotConvert(fromType, toType);
}
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- Invariant.cs
- SelectionPattern.cs
- Size3DConverter.cs
- ZipIORawDataFileBlock.cs
- EntityContainerEmitter.cs
- ArrayListCollectionBase.cs
- Mappings.cs
- WindowsRichEditRange.cs
- TypedServiceChannelBuilder.cs
- TextRange.cs
- DBAsyncResult.cs
- DataServiceConfiguration.cs
- X509ThumbprintKeyIdentifierClause.cs
- RowVisual.cs
- HttpDigestClientElement.cs
- ViewBox.cs
- CacheChildrenQuery.cs
- AutomationPropertyInfo.cs
- RelationshipDetailsRow.cs
- ExpressionStringBuilder.cs
- MetadataArtifactLoaderResource.cs
- BeginStoryboard.cs
- RelationshipSet.cs
- AnimatedTypeHelpers.cs
- PrintController.cs
- QuaternionAnimation.cs
- SspiHelper.cs
- DataSysAttribute.cs
- BamlTreeMap.cs
- Assembly.cs
- SignatureHelper.cs
- LOSFormatter.cs
- SaveFileDialog.cs
- WSTransactionSection.cs
- NotFiniteNumberException.cs
- IPipelineRuntime.cs
- ObjectViewEntityCollectionData.cs
- Vector3DAnimation.cs
- HtmlProps.cs
- Stylesheet.cs
- DataKeyArray.cs
- DataGridColumnDropSeparator.cs
- InfoCardRSAPKCS1SignatureFormatter.cs
- RotateTransform3D.cs
- TypedTableGenerator.cs
- Stopwatch.cs
- ObjectItemNoOpAssemblyLoader.cs
- SupportsEventValidationAttribute.cs
- MimeTypePropertyAttribute.cs
- CodeMemberField.cs
- TransactionManager.cs
- TransactionsSectionGroup.cs
- securitymgrsite.cs
- WindowsEditBox.cs
- WinFormsSecurity.cs
- CalculatedColumn.cs
- TextServicesHost.cs
- RedBlackList.cs
- DbLambda.cs
- xsdvalidator.cs
- ChangeTracker.cs
- TableLayoutSettings.cs
- CombinedGeometry.cs
- InlinedAggregationOperatorEnumerator.cs
- ExpandCollapseProviderWrapper.cs
- ObjectDataSource.cs
- DataSourceCache.cs
- TextRenderer.cs
- Parallel.cs
- WorkflowRuntimeServicesBehavior.cs
- SourceChangedEventArgs.cs
- WindowsToolbar.cs
- ObsoleteAttribute.cs
- ImmComposition.cs
- MailAddress.cs
- MappingModelBuildProvider.cs
- GridViewUpdateEventArgs.cs
- ListView.cs
- WindowsListViewGroupHelper.cs
- XmlSchemaExporter.cs
- KernelTypeValidation.cs
- HostedTransportConfigurationManager.cs
- FormClosedEvent.cs
- ButtonFlatAdapter.cs
- FacetValues.cs
- SendKeys.cs
- ButtonAutomationPeer.cs
- DesignerTextBoxAdapter.cs
- DataGridViewColumnHeaderCell.cs
- Subset.cs
- Focus.cs
- XsltArgumentList.cs
- HwndTarget.cs
- ExpressionConverter.cs
- PerformanceCounters.cs
- ObjectListItem.cs
- DataControlField.cs
- OracleTimeSpan.cs
- xamlnodes.cs
- SymbolEqualComparer.cs