Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityClient / EntityParameter.cs / 1305376 / EntityParameter.cs
//----------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//
// @owner [....]
// @backupOwner [....]
//---------------------------------------------------------------------
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.Common;
using System.Data.Common.CommandTrees;
using System.Data.Common.Internal;
using System.Data.Metadata.Edm;
using System.Text.RegularExpressions;
using System.Diagnostics;
namespace System.Data.EntityClient
{
///
/// Class representing a parameter used in EntityCommand
///
public sealed partial class EntityParameter : DbParameter, IDbDataParameter
{
private string _parameterName;
private DbType? _dbType;
private byte? _precision;
private byte? _scale;
private bool _isDirty;
///
/// Constructs the EntityParameter object
///
public EntityParameter()
{
}
///
/// Constructs the EntityParameter object with the given parameter name and the type of the parameter
///
/// The name of the parameter
/// The type of the parameter
public EntityParameter(string parameterName, DbType dbType)
{
SetParameterNameWithValidation(parameterName, "parameterName");
this.DbType = dbType;
}
///
/// Constructs the EntityParameter object with the given parameter name, the type of the parameter, and the size of the
/// parameter
///
/// The name of the parameter
/// The type of the parameter
/// The size of the parameter
public EntityParameter(string parameterName, DbType dbType, int size)
{
SetParameterNameWithValidation(parameterName, "parameterName");
this.DbType = dbType;
this.Size = size;
}
///
/// Constructs the EntityParameter object with the given parameter name, the type of the parameter, the size of the
/// parameter, and the name of the source column
///
/// The name of the parameter
/// The type of the parameter
/// The size of the parameter
/// The name of the source column mapped to the data set, used for loading the parameter value
public EntityParameter(string parameterName, DbType dbType, int size, string sourceColumn)
{
SetParameterNameWithValidation(parameterName, "parameterName");
this.DbType = dbType;
this.Size = size;
this.SourceColumn = sourceColumn;
}
///
/// Constructs the EntityParameter object with the given parameter name, the type of the parameter, the size of the
/// parameter, and the name of the source column
///
/// The name of the parameter
/// The type of the parameter
/// The size of the parameter
/// The direction of the parameter, whether it's input/output/both/return value
/// If the parameter is nullable
/// The floating point precision of the parameter, valid only if the parameter type is a floating point type
/// The scale of the parameter, valid only if the parameter type is a floating point type
/// The name of the source column mapped to the data set, used for loading the parameter value
/// The data row version to use when loading the parameter value
/// The value of the parameter
public EntityParameter(string parameterName,
DbType dbType,
int size,
ParameterDirection direction,
bool isNullable,
byte precision,
byte scale,
string sourceColumn,
DataRowVersion sourceVersion,
object value)
{
SetParameterNameWithValidation(parameterName, "parameterName");
this.DbType = dbType;
this.Size = size;
this.Direction = direction;
this.IsNullable = isNullable;
this.Precision = precision;
this.Scale = scale;
this.SourceColumn = sourceColumn;
this.SourceVersion = sourceVersion;
this.Value = value;
}
///
/// The name of the parameter
///
public override string ParameterName
{
get
{
return this._parameterName ?? "";
}
set
{
SetParameterNameWithValidation(value, "value");
}
}
///
/// Helper method to validate the parameter name; Ideally we'd only call this once, but
/// we have to put an argumentName on the Argument exception, and the property setter would
/// need "value" which confuses folks when they call the constructor that takes the value
/// of the parameter. c'est la vie.
///
///
///
private void SetParameterNameWithValidation(string parameterName, string argumentName)
{
if (!string.IsNullOrEmpty(parameterName) && !DbCommandTree.IsValidParameterName(parameterName))
{
throw EntityUtil.Argument(System.Data.Entity.Strings.EntityClient_InvalidParameterName(parameterName), argumentName);
}
PropertyChanging();
this._parameterName = parameterName;
}
///
/// The type of the parameter
///
public override DbType DbType
{
get
{
// If the user hasn't set the DbType, then we deduce it from the value, but we won't set it in the
// member field as it's used to keep track of what the user set explicitly
if (!this._dbType.HasValue)
{
// If we can't deduce the type as there are no values, just assume it's string type
if (_value == null)
return DbType.String;
try
{
return TypeHelpers.ConvertClrTypeToDbType(_value.GetType());
}
catch (ArgumentException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_CannotDeduceDbType, e);
}
}
return (DbType)this._dbType;
}
set
{
PropertyChanging();
this._dbType = value;
}
}
///
/// The precision of the parameter if the parameter is a floating point type
///
public byte Precision
{
get
{
byte result = this._precision.HasValue ? this._precision.Value : (byte)0;
return result;
}
set
{
PropertyChanging();
this._precision = value;
}
}
///
/// The scale of the parameter if the parameter is a floating point type
///
public byte Scale
{
get
{
byte result = this._scale.HasValue ? this._scale.Value : (byte)0;
return result;
}
set
{
PropertyChanging();
this._scale = value;
}
}
///
/// The value of the parameter
///
public override object Value
{
get
{
return this._value;
}
set
{
// If the user hasn't set the DbType, then we have to figure out if the DbType will change as a result
// of the change in the value. What we want to achieve is that changes to the value will not cause
// it to be dirty, but changes to the value that causes the apparent DbType to change, then should be
// dirty.
if (!this._dbType.HasValue)
{
// If the value is null, then we assume it's string type
DbType oldDbType = DbType.String;
if (_value != null)
{
oldDbType = TypeHelpers.ConvertClrTypeToDbType(_value.GetType());
}
// If the value is null, then we assume it's string type
DbType newDbType = DbType.String;
if (value != null)
{
newDbType = TypeHelpers.ConvertClrTypeToDbType(value.GetType());
}
if (oldDbType != newDbType)
{
PropertyChanging();
}
}
this._value = value;
}
}
///
/// Gets whether this collection has been changes since the last reset
///
internal bool IsDirty
{
get
{
return _isDirty;
}
}
///
/// Indicates whether the DbType property has been set by the user;
///
internal bool IsDbTypeSpecified
{
get
{
return this._dbType.HasValue;
}
}
///
/// Indicates whether the Direction property has been set by the user;
///
internal bool IsDirectionSpecified
{
get
{
return this._direction != 0;
}
}
///
/// Indicates whether the IsNullable property has been set by the user;
///
internal bool IsIsNullableSpecified
{
get
{
return this._isNullable.HasValue;
}
}
///
/// Indicates whether the Precision property has been set by the user;
///
internal bool IsPrecisionSpecified
{
get
{
return this._precision.HasValue;
}
}
///
/// Indicates whether the Scale property has been set by the user;
///
internal bool IsScaleSpecified
{
get
{
return this._scale.HasValue;
}
}
///
/// Indicates whether the Size property has been set by the user;
///
internal bool IsSizeSpecified
{
get
{
return this._size.HasValue;
}
}
///
/// Resets the DbType property to its original settings
///
public override void ResetDbType()
{
if (_dbType != null)
{
PropertyChanging();
}
_dbType = null;
}
///
/// Clones this parameter object
///
/// The new cloned object
internal EntityParameter Clone()
{
return new EntityParameter(this);
}
///
/// Clones this parameter object
///
/// The new cloned object
private void CloneHelper(EntityParameter destination)
{
CloneHelperCore(destination);
destination._parameterName = _parameterName;
destination._dbType = _dbType;
destination._precision = _precision;
destination._scale = _scale;
}
///
/// Marks that this parameter has been changed
///
private void PropertyChanging()
{
_isDirty = true;
}
///
/// Determines the size of the given object
///
///
///
/// Get the type usage for this parameter in model terms.
///
/// The type usage for this parameter
//NOTE: Because GetTypeUsage throws CommandValidationExceptions, it should only be called from EntityCommand during command execution
internal TypeUsage GetTypeUsage()
{
TypeUsage typeUsage;
if (!DbTypeMap.TryGetModelTypeUsage(this.DbType, out typeUsage))
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_UnsupportedDbType(this.DbType.ToString(), ParameterName));
}
Debug.Assert(typeUsage != null, "DbType.TryGetModelTypeUsage returned true for null TypeUsage?");
return typeUsage;
}
///
/// Reset the dirty flag on the collection
///
internal void ResetIsDirty()
{
_isDirty = false;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//----------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//
// @owner [....]
// @backupOwner [....]
//---------------------------------------------------------------------
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.Common;
using System.Data.Common.CommandTrees;
using System.Data.Common.Internal;
using System.Data.Metadata.Edm;
using System.Text.RegularExpressions;
using System.Diagnostics;
namespace System.Data.EntityClient
{
///
/// Class representing a parameter used in EntityCommand
///
public sealed partial class EntityParameter : DbParameter, IDbDataParameter
{
private string _parameterName;
private DbType? _dbType;
private byte? _precision;
private byte? _scale;
private bool _isDirty;
///
/// Constructs the EntityParameter object
///
public EntityParameter()
{
}
///
/// Constructs the EntityParameter object with the given parameter name and the type of the parameter
///
/// The name of the parameter
/// The type of the parameter
public EntityParameter(string parameterName, DbType dbType)
{
SetParameterNameWithValidation(parameterName, "parameterName");
this.DbType = dbType;
}
///
/// Constructs the EntityParameter object with the given parameter name, the type of the parameter, and the size of the
/// parameter
///
/// The name of the parameter
/// The type of the parameter
/// The size of the parameter
public EntityParameter(string parameterName, DbType dbType, int size)
{
SetParameterNameWithValidation(parameterName, "parameterName");
this.DbType = dbType;
this.Size = size;
}
///
/// Constructs the EntityParameter object with the given parameter name, the type of the parameter, the size of the
/// parameter, and the name of the source column
///
/// The name of the parameter
/// The type of the parameter
/// The size of the parameter
/// The name of the source column mapped to the data set, used for loading the parameter value
public EntityParameter(string parameterName, DbType dbType, int size, string sourceColumn)
{
SetParameterNameWithValidation(parameterName, "parameterName");
this.DbType = dbType;
this.Size = size;
this.SourceColumn = sourceColumn;
}
///
/// Constructs the EntityParameter object with the given parameter name, the type of the parameter, the size of the
/// parameter, and the name of the source column
///
/// The name of the parameter
/// The type of the parameter
/// The size of the parameter
/// The direction of the parameter, whether it's input/output/both/return value
/// If the parameter is nullable
/// The floating point precision of the parameter, valid only if the parameter type is a floating point type
/// The scale of the parameter, valid only if the parameter type is a floating point type
/// The name of the source column mapped to the data set, used for loading the parameter value
/// The data row version to use when loading the parameter value
/// The value of the parameter
public EntityParameter(string parameterName,
DbType dbType,
int size,
ParameterDirection direction,
bool isNullable,
byte precision,
byte scale,
string sourceColumn,
DataRowVersion sourceVersion,
object value)
{
SetParameterNameWithValidation(parameterName, "parameterName");
this.DbType = dbType;
this.Size = size;
this.Direction = direction;
this.IsNullable = isNullable;
this.Precision = precision;
this.Scale = scale;
this.SourceColumn = sourceColumn;
this.SourceVersion = sourceVersion;
this.Value = value;
}
///
/// The name of the parameter
///
public override string ParameterName
{
get
{
return this._parameterName ?? "";
}
set
{
SetParameterNameWithValidation(value, "value");
}
}
///
/// Helper method to validate the parameter name; Ideally we'd only call this once, but
/// we have to put an argumentName on the Argument exception, and the property setter would
/// need "value" which confuses folks when they call the constructor that takes the value
/// of the parameter. c'est la vie.
///
///
///
private void SetParameterNameWithValidation(string parameterName, string argumentName)
{
if (!string.IsNullOrEmpty(parameterName) && !DbCommandTree.IsValidParameterName(parameterName))
{
throw EntityUtil.Argument(System.Data.Entity.Strings.EntityClient_InvalidParameterName(parameterName), argumentName);
}
PropertyChanging();
this._parameterName = parameterName;
}
///
/// The type of the parameter
///
public override DbType DbType
{
get
{
// If the user hasn't set the DbType, then we deduce it from the value, but we won't set it in the
// member field as it's used to keep track of what the user set explicitly
if (!this._dbType.HasValue)
{
// If we can't deduce the type as there are no values, just assume it's string type
if (_value == null)
return DbType.String;
try
{
return TypeHelpers.ConvertClrTypeToDbType(_value.GetType());
}
catch (ArgumentException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_CannotDeduceDbType, e);
}
}
return (DbType)this._dbType;
}
set
{
PropertyChanging();
this._dbType = value;
}
}
///
/// The precision of the parameter if the parameter is a floating point type
///
public byte Precision
{
get
{
byte result = this._precision.HasValue ? this._precision.Value : (byte)0;
return result;
}
set
{
PropertyChanging();
this._precision = value;
}
}
///
/// The scale of the parameter if the parameter is a floating point type
///
public byte Scale
{
get
{
byte result = this._scale.HasValue ? this._scale.Value : (byte)0;
return result;
}
set
{
PropertyChanging();
this._scale = value;
}
}
///
/// The value of the parameter
///
public override object Value
{
get
{
return this._value;
}
set
{
// If the user hasn't set the DbType, then we have to figure out if the DbType will change as a result
// of the change in the value. What we want to achieve is that changes to the value will not cause
// it to be dirty, but changes to the value that causes the apparent DbType to change, then should be
// dirty.
if (!this._dbType.HasValue)
{
// If the value is null, then we assume it's string type
DbType oldDbType = DbType.String;
if (_value != null)
{
oldDbType = TypeHelpers.ConvertClrTypeToDbType(_value.GetType());
}
// If the value is null, then we assume it's string type
DbType newDbType = DbType.String;
if (value != null)
{
newDbType = TypeHelpers.ConvertClrTypeToDbType(value.GetType());
}
if (oldDbType != newDbType)
{
PropertyChanging();
}
}
this._value = value;
}
}
///
/// Gets whether this collection has been changes since the last reset
///
internal bool IsDirty
{
get
{
return _isDirty;
}
}
///
/// Indicates whether the DbType property has been set by the user;
///
internal bool IsDbTypeSpecified
{
get
{
return this._dbType.HasValue;
}
}
///
/// Indicates whether the Direction property has been set by the user;
///
internal bool IsDirectionSpecified
{
get
{
return this._direction != 0;
}
}
///
/// Indicates whether the IsNullable property has been set by the user;
///
internal bool IsIsNullableSpecified
{
get
{
return this._isNullable.HasValue;
}
}
///
/// Indicates whether the Precision property has been set by the user;
///
internal bool IsPrecisionSpecified
{
get
{
return this._precision.HasValue;
}
}
///
/// Indicates whether the Scale property has been set by the user;
///
internal bool IsScaleSpecified
{
get
{
return this._scale.HasValue;
}
}
///
/// Indicates whether the Size property has been set by the user;
///
internal bool IsSizeSpecified
{
get
{
return this._size.HasValue;
}
}
///
/// Resets the DbType property to its original settings
///
public override void ResetDbType()
{
if (_dbType != null)
{
PropertyChanging();
}
_dbType = null;
}
///
/// Clones this parameter object
///
/// The new cloned object
internal EntityParameter Clone()
{
return new EntityParameter(this);
}
///
/// Clones this parameter object
///
/// The new cloned object
private void CloneHelper(EntityParameter destination)
{
CloneHelperCore(destination);
destination._parameterName = _parameterName;
destination._dbType = _dbType;
destination._precision = _precision;
destination._scale = _scale;
}
///
/// Marks that this parameter has been changed
///
private void PropertyChanging()
{
_isDirty = true;
}
///
/// Determines the size of the given object
///
///
///
/// Get the type usage for this parameter in model terms.
///
/// The type usage for this parameter
//NOTE: Because GetTypeUsage throws CommandValidationExceptions, it should only be called from EntityCommand during command execution
internal TypeUsage GetTypeUsage()
{
TypeUsage typeUsage;
if (!DbTypeMap.TryGetModelTypeUsage(this.DbType, out typeUsage))
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_UnsupportedDbType(this.DbType.ToString(), ParameterName));
}
Debug.Assert(typeUsage != null, "DbType.TryGetModelTypeUsage returned true for null TypeUsage?");
return typeUsage;
}
///
/// Reset the dirty flag on the collection
///
internal void ResetIsDirty()
{
_isDirty = false;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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