好奇。
我有两个对象（在我的WCF服务中）：
ViewEncountertimes类和实体t之间的所有属性类型都相同，但属性名称不同。
这个转换可以正常地将属性从t重命名为正确的PascalCase，我正在我的数据传输对象中使用ViewEncounterTimes：
var e = new ViewEncountertimes
{
Age = t.age,
Birthdate = t.birthdate,
Cashonly = t.cashonly,
ChartNumber = t.chart_number,
ChartRecid = t.chart_recid,
Checkin = t.checkin,
Notseen = t.notseen,
Checkout = t.checkout,
Complexity = t.complexity,
Cpatient = t.cpatient,
Donotsee = t.donotsee,
EncounterRecid = t.encounter_recid,
Firstname = t.firstname,
Lastname = t.lastname,
Mi = t.mi,
Newold = t.newold,
PatientRecid = t.patient_recid,
Recid = t.recid,
ServiceRecid = t.service_recid,
Sex = t.sex,
Ssn = t.ssn,
Tcheckout = t.tcheckout,
Tencounter = t.tencounter,
Visitsprior3years = t.visitsprior3years
};
有没有使用铸造的方式，我可以说：
投射为ViewEncountertimes
并拥有正确的名称和对象类型？
（目前，我正在使用单独的转换程序进行转换）。
TIA
编辑＃1：这是ViewEncountertimes的定义
public partial class ViewEncountertimes
{
public int EncounterRecid { get; set; }
public int PatientRecid { get; set; }
public int ServiceRecid { get; set; }
public int ChartRecid { get; set; }
public Nullable<int> ChartNumber { get; set; }
public string Cpatient { get; set; }
public Nullable<System.DateTime> Tencounter { get; set; }
public Nullable<System.DateTime> Tcheckout { get; set; }
public string Checkin { get; set; }
public string Checkout { get; set; }
public Nullable<bool> Notseen { get; set; }
public string Newold { get; set; }
public string Complexity { get; set; }
public string Lastname { get; set; }
public string Firstname { get; set; }
public string Mi { get; set; }
public string Birthdate { get; set; }
public string Ssn { get; set; }
public string Sex { get; set; }
public string Age { get; set; }
public Nullable<bool> Donotsee { get; set; }
public Nullable<bool> Cashonly { get; set; }
public Nullable<long> Visitsprior3years { get; set; }
public int Recid { get; set; }
}
答案 0 :(得分：3)
Casting不会更改对象 - 它只会更改编译器绑定属性和方法调用的方式。您必须通过复制数据进行映射 - 可以手动执行，动态使用反射，也可以使用第三方库，如AutoMapper。
答案 1 :(得分：2)
这是我创建的一个对象的例子。在此示例中，实体对象和我的模型都具有ID，Label，ULabel（大写标签），MimeType和DefaultExtension。
namespace Project.Models
{
public class ProjectMimeType : ProjectEntity
{
public mime_types EntityMimeType = new mime_types(); // Entity Object
// begin direct db map
public long Id
{
get { return EntityMimeType.mime_type_id; }
set { EntityMimeType.mime_type_id = value; }
}
public string Label
{
get { return EntityMimeType.label; }
set
{
EntityMimeType.label = value;
EntityMimeType.ulabel = value.ToUpper();
}
}
public string Ulabel => EntityMimeType.ulabel;
public string MimeType
{
get { return EntityMimeType.mime_type; }
set { EntityMimeType.mime_type = value; }
}
public string DefaultExtension
{
get { return EntityMimeType.default_extension; }
set { EntityMimeType.default_extension = value; }
}
}
}
所以这样，当我创建我使用的对象时，我声明它如下所示。
var e = db.mime_types.Find(id);
var c = new ProjectMimeType{ EntityMimeType = e };
答案 2 :(得分：0)
为了帮助像我这样的新手，使用之前的答案，我为我的实体框架创建了一个T4模板，以手动映射和创建我的数据传输对象。下面的模板生成如下代码：
public partial class ViewEncountertimes
{
public view_encountertimes m = new view_encountertimes();
public int EncounterRecid { get { return m.encounter_recid; } set { m.encounter_recid = value; } }
public int PatientRecid { get { return m.patient_recid; } set { m.patient_recid = value; } }
public int ServiceRecid { get { return m.service_recid; } set { m.service_recid = value; } }
public int ChartRecid { get { return m.chart_recid; } set { m.chart_recid = value; } }
public Nullable<int> ChartNumber { get { return m.chart_number; } set { m.chart_number = value; } }
public string Cpatient { get { return m.cpatient; } set { m.cpatient = value; } }
public Nullable<System.DateTime> Tencounter { get { return m.tencounter; } set { m.tencounter = value; } }
public Nullable<System.DateTime> Tcheckout { get { return m.tcheckout; } set { m.tcheckout = value; } }
public string Checkin { get { return m.checkin; } set { m.checkin = value; } }
public string Checkout { get { return m.checkout; } set { m.checkout = value; } }
public Nullable<bool> Notseen { get { return m.notseen; } set { m.notseen = value; } }
public string Newold { get { return m.newold; } set { m.newold = value; } }
public string Complexity { get { return m.complexity; } set { m.complexity = value; } }
public string Lastname { get { return m.lastname; } set { m.lastname = value; } }
public string Firstname { get { return m.firstname; } set { m.firstname = value; } }
public string Mi { get { return m.mi; } set { m.mi = value; } }
public string Birthdate { get { return m.birthdate; } set { m.birthdate = value; } }
public string Ssn { get { return m.ssn; } set { m.ssn = value; } }
public string Sex { get { return m.sex; } set { m.sex = value; } }
public string Age { get { return m.age; } set { m.age = value; } }
public Nullable<bool> Donotsee { get { return m.donotsee; } set { m.donotsee = value; } }
public Nullable<bool> Cashonly { get { return m.cashonly; } set { m.cashonly = value; } }
public Nullable<long> Visitsprior3years { get { return m.visitsprior3years; } set { m.visitsprior3years = value; } }
public int Recid { get { return m.recid; } set { m.recid = value; } }
}
Here is the template I used:
<#@ template debug="false" hostspecific="true" language="C#" #>
<#@ assembly name="System.Core" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Text" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Text.RegularExpressions" #>
<#@ include file="EF6.Utility.CS.ttinclude" #>
<#@ output extension=".cs" #>
<#
const string inputFile = @"MedicalOfficeModel.edmx";
var textTransform = DynamicTextTransformation.Create(this);
var code = new CodeGenerationTools(this);
var ef = new MetadataTools(this);
var typeMapper = new TypeMapper(code, ef, textTransform.Errors);
var fileManager = EntityFrameworkTemplateFileManager.Create(this);
var itemCollection = new EdmMetadataLoader(textTransform.Host, textTransform.Errors).CreateEdmItemCollection(inputFile);
var codeStringGenerator = new CodeStringGenerator(code, typeMapper, ef);
if (!typeMapper.VerifyCaseInsensitiveTypeUniqueness(typeMapper.GetAllGlobalItems(itemCollection), inputFile))
{
return string.Empty;
}
WriteHeader(codeStringGenerator, fileManager);
foreach (var entity in typeMapper.GetItemsToGenerate<EntityType>(itemCollection))
{
fileManager.StartNewFile(entity.Name + ".cs");
BeginNamespace(code);
#>
<#=codeStringGenerator.UsingDirectives(inHeader: false)#>
<#=codeStringGenerator.EntityClassOpening(entity)#>
{
<#= Mime(code.Escape(entity)) #>
<#
var simpleProperties = typeMapper.GetSimpleProperties(entity);
if (simpleProperties.Any())
{
foreach (var edmProperty in simpleProperties)
{
#>
<#=codeStringGenerator.Property(edmProperty)#>
<#
}
}
#>
}
<#
EndNamespace(code);
}
fileManager.Process(false);
#>
<#+
public static string Mime(string entity)
{
return string.Format(" public {0} m = new {0}();", entity);
}
public static string GetPascalCase(string name)
{
return Regex.Replace(name, @"^\w|_\w",
(match) => match.Value.Replace("_", "").ToUpper());
}
public void WriteHeader(CodeStringGenerator codeStringGenerator, EntityFrameworkTemplateFileManager fileManager)
{
fileManager.StartHeader();
#>
//------------------------------------------------------------------------------
// <auto-generated>
// <#=CodeGenerationTools.GetResourceString("Template_GeneratedCodeCommentLine1")#>
//
// <#=CodeGenerationTools.GetResourceString("Template_GeneratedCodeCommentLine2")#>
// <#=CodeGenerationTools.GetResourceString("Template_GeneratedCodeCommentLine3")#>
// </auto-generated>
//------------------------------------------------------------------------------
<#=codeStringGenerator.UsingDirectives(inHeader: true)#>
<#+
fileManager.EndBlock();
}
public void BeginNamespace(CodeGenerationTools code)
{
var codeNamespace = String.Format("{0}.{1}",code.VsNamespaceSuggestion(), "DTO");
if (!String.IsNullOrEmpty(codeNamespace))
{
#>
namespace <#=code.EscapeNamespace(codeNamespace)#>
{
<#+
PushIndent(" ");
}
}
public void EndNamespace(CodeGenerationTools code)
{
if (!String.IsNullOrEmpty(code.VsNamespaceSuggestion()))
{
PopIndent();
#>
}
<#+
}
}
public const string TemplateId = "CSharp_DbContext_Types_EF6";
public class CodeStringGenerator
{
private readonly CodeGenerationTools _code;
private readonly TypeMapper _typeMapper;
private readonly MetadataTools _ef;
public CodeStringGenerator(CodeGenerationTools code, TypeMapper typeMapper, MetadataTools ef)
{
ArgumentNotNull(code, "code");
ArgumentNotNull(typeMapper, "typeMapper");
ArgumentNotNull(ef, "ef");
_code = code;
_typeMapper = typeMapper;
_ef = ef;
}
public string Property(EdmProperty edmProperty)
{
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1} {2} {{ {3}get {{ return m.{5}; }} {4}set {{ m.{5} = value; }} }}",
Accessibility.ForProperty(edmProperty),
_typeMapper.GetTypeName(edmProperty.TypeUsage),
GetPascalCase(_code.Escape(edmProperty)) ,
_code.SpaceAfter(Accessibility.ForGetter(edmProperty)),
_code.SpaceAfter(Accessibility.ForSetter(edmProperty)),
_code.Escape(edmProperty)
);
}
public string NavigationProperty(NavigationProperty navProp)
{
var endType = _typeMapper.GetTypeName(navProp.ToEndMember.GetEntityType());
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1} {2} {{ {3}get; {4}set; }}",
AccessibilityAndVirtual(Accessibility.ForNavigationProperty(navProp)),
navProp.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many ? ("ICollection<" + endType + ">") : endType,
_code.Escape(navProp),
_code.SpaceAfter(Accessibility.ForGetter(navProp)),
_code.SpaceAfter(Accessibility.ForSetter(navProp)));
}
public string AccessibilityAndVirtual(string accessibility)
{
return accessibility + (accessibility != "private" ? " virtual" : "");
}
public string EntityClassOpening(EntityType entity)
{
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1}partial class {2}{3}",
Accessibility.ForType(entity),
_code.SpaceAfter(_code.AbstractOption(entity)),
GetPascalCase(_code.Escape(entity)),
_code.StringBefore(" : ", _typeMapper.GetTypeName(entity.BaseType)));
}
public string EnumOpening(SimpleType enumType)
{
return string.Format(
CultureInfo.InvariantCulture,
"{0} enum {1} : {2}",
Accessibility.ForType(enumType),
_code.Escape(enumType),
_code.Escape(_typeMapper.UnderlyingClrType(enumType)));
}
public void WriteFunctionParameters(EdmFunction edmFunction, Action<string, string, string, string> writeParameter)
{
var parameters = FunctionImportParameter.Create(edmFunction.Parameters, _code, _ef);
foreach (var parameter in parameters.Where(p => p.NeedsLocalVariable))
{
var isNotNull = parameter.IsNullableOfT ? parameter.FunctionParameterName + ".HasValue" : parameter.FunctionParameterName + " != null";
var notNullInit = "new ObjectParameter(\"" + parameter.EsqlParameterName + "\", " + parameter.FunctionParameterName + ")";
var nullInit = "new ObjectParameter(\"" + parameter.EsqlParameterName + "\", typeof(" + TypeMapper.FixNamespaces(parameter.RawClrTypeName) + "))";
writeParameter(parameter.LocalVariableName, isNotNull, notNullInit, nullInit);
}
}
public string ComposableFunctionMethod(EdmFunction edmFunction, string modelNamespace)
{
var parameters = _typeMapper.GetParameters(edmFunction);
return string.Format(
CultureInfo.InvariantCulture,
"{0} IQueryable<{1}> {2}({3})",
AccessibilityAndVirtual(Accessibility.ForMethod(edmFunction)),
_typeMapper.GetTypeName(_typeMapper.GetReturnType(edmFunction), modelNamespace),
_code.Escape(edmFunction),
string.Join(", ", parameters.Select(p => TypeMapper.FixNamespaces(p.FunctionParameterType) + " " + p.FunctionParameterName).ToArray()));
}
public string ComposableCreateQuery(EdmFunction edmFunction, string modelNamespace)
{
var parameters = _typeMapper.GetParameters(edmFunction);
return string.Format(
CultureInfo.InvariantCulture,
"return ((IObjectContextAdapter)this).ObjectContext.CreateQuery<{0}>(\"[{1}].[{2}]({3})\"{4});",
_typeMapper.GetTypeName(_typeMapper.GetReturnType(edmFunction), modelNamespace),
edmFunction.NamespaceName,
edmFunction.Name,
string.Join(", ", parameters.Select(p => "@" + p.EsqlParameterName).ToArray()),
_code.StringBefore(", ", string.Join(", ", parameters.Select(p => p.ExecuteParameterName).ToArray())));
}
public string FunctionMethod(EdmFunction edmFunction, string modelNamespace, bool includeMergeOption)
{
var parameters = _typeMapper.GetParameters(edmFunction);
var returnType = _typeMapper.GetReturnType(edmFunction);
var paramList = String.Join(", ", parameters.Select(p => TypeMapper.FixNamespaces(p.FunctionParameterType) + " " + p.FunctionParameterName).ToArray());
if (includeMergeOption)
{
paramList = _code.StringAfter(paramList, ", ") + "MergeOption mergeOption";
}
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1} {2}({3})",
AccessibilityAndVirtual(Accessibility.ForMethod(edmFunction)),
returnType == null ? "int" : "ObjectResult<" + _typeMapper.GetTypeName(returnType, modelNamespace) + ">",
_code.Escape(edmFunction),
paramList);
}
public string ExecuteFunction(EdmFunction edmFunction, string modelNamespace, bool includeMergeOption)
{
var parameters = _typeMapper.GetParameters(edmFunction);
var returnType = _typeMapper.GetReturnType(edmFunction);
var callParams = _code.StringBefore(", ", String.Join(", ", parameters.Select(p => p.ExecuteParameterName).ToArray()));
if (includeMergeOption)
{
callParams = ", mergeOption" + callParams;
}
return string.Format(
CultureInfo.InvariantCulture,
"return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction{0}(\"{1}\"{2});",
returnType == null ? "" : "<" + _typeMapper.GetTypeName(returnType, modelNamespace) + ">",
edmFunction.Name,
callParams);
}
public string DbSet(EntitySet entitySet)
{
return string.Format(
CultureInfo.InvariantCulture,
"{0} virtual DbSet<{1}> {2} {{ get; set; }}",
Accessibility.ForReadOnlyProperty(entitySet),
_typeMapper.GetTypeName(entitySet.ElementType),
_code.Escape(entitySet));
}
public string UsingDirectives(bool inHeader, bool includeCollections = true)
{
return inHeader == string.IsNullOrEmpty(_code.VsNamespaceSuggestion())
? string.Format(
CultureInfo.InvariantCulture,
"{0}using System;{1}" +
"{2}",
inHeader ? Environment.NewLine : "",
includeCollections ? (Environment.NewLine + "using System.Collections.Generic;") : "",
inHeader ? "" : Environment.NewLine)
: "";
}
}
public class TypeMapper
{
private const string ExternalTypeNameAttributeName = @"http://schemas.microsoft.com/ado/2006/04/codegeneration:ExternalTypeName";
private readonly System.Collections.IList _errors;
private readonly CodeGenerationTools _code;
private readonly MetadataTools _ef;
public TypeMapper(CodeGenerationTools code, MetadataTools ef, System.Collections.IList errors)
{
ArgumentNotNull(code, "code");
ArgumentNotNull(ef, "ef");
ArgumentNotNull(errors, "errors");
_code = code;
_ef = ef;
_errors = errors;
}
public static string FixNamespaces(string typeName)
{
return typeName.Replace("System.Data.Spatial.", "System.Data.Entity.Spatial.");
}
public string GetTypeName(TypeUsage typeUsage)
{
return typeUsage == null ? null : GetTypeName(typeUsage.EdmType, _ef.IsNullable(typeUsage), modelNamespace: null);
}
public string GetTypeName(EdmType edmType)
{
return GetTypeName(edmType, isNullable: null, modelNamespace: null);
}
public string GetTypeName(TypeUsage typeUsage, string modelNamespace)
{
return typeUsage == null ? null : GetTypeName(typeUsage.EdmType, _ef.IsNullable(typeUsage), modelNamespace);
}
public string GetTypeName(EdmType edmType, string modelNamespace)
{
return GetTypeName(edmType, isNullable: null, modelNamespace: modelNamespace);
}
public string GetTypeName(EdmType edmType, bool? isNullable, string modelNamespace)
{
if (edmType == null)
{
return null;
}
var collectionType = edmType as CollectionType;
if (collectionType != null)
{
return String.Format(CultureInfo.InvariantCulture, "ICollection<{0}>", GetTypeName(collectionType.TypeUsage, modelNamespace));
}
var typeName = _code.Escape(edmType.MetadataProperties
.Where(p => p.Name == ExternalTypeNameAttributeName)
.Select(p => (string)p.Value)
.FirstOrDefault())
?? (modelNamespace != null && edmType.NamespaceName != modelNamespace ?
_code.CreateFullName(_code.EscapeNamespace(edmType.NamespaceName), _code.Escape(edmType)) :
_code.Escape(edmType));
if (edmType is StructuralType)
{
return typeName;
}
if (edmType is SimpleType)
{
var clrType = UnderlyingClrType(edmType);
if (!IsEnumType(edmType))
{
typeName = _code.Escape(clrType);
}
typeName = FixNamespaces(typeName);
return clrType.IsValueType && isNullable == true ?
String.Format(CultureInfo.InvariantCulture, "Nullable<{0}>", typeName) :
typeName;
}
throw new ArgumentException("edmType");
}
public Type UnderlyingClrType(EdmType edmType)
{
ArgumentNotNull(edmType, "edmType");
var primitiveType = edmType as PrimitiveType;
if (primitiveType != null)
{
return primitiveType.ClrEquivalentType;
}
if (IsEnumType(edmType))
{
return GetEnumUnderlyingType(edmType).ClrEquivalentType;
}
return typeof(object);
}
public object GetEnumMemberValue(MetadataItem enumMember)
{
ArgumentNotNull(enumMember, "enumMember");
var valueProperty = enumMember.GetType().GetProperty("Value");
return valueProperty == null ? null : valueProperty.GetValue(enumMember, null);
}
public string GetEnumMemberName(MetadataItem enumMember)
{
ArgumentNotNull(enumMember, "enumMember");
var nameProperty = enumMember.GetType().GetProperty("Name");
return nameProperty == null ? null : (string)nameProperty.GetValue(enumMember, null);
}
public System.Collections.IEnumerable GetEnumMembers(EdmType enumType)
{
ArgumentNotNull(enumType, "enumType");
var membersProperty = enumType.GetType().GetProperty("Members");
return membersProperty != null
? (System.Collections.IEnumerable)membersProperty.GetValue(enumType, null)
: Enumerable.Empty<MetadataItem>();
}
public bool EnumIsFlags(EdmType enumType)
{
ArgumentNotNull(enumType, "enumType");
var isFlagsProperty = enumType.GetType().GetProperty("IsFlags");
return isFlagsProperty != null && (bool)isFlagsProperty.GetValue(enumType, null);
}
public bool IsEnumType(GlobalItem edmType)
{
ArgumentNotNull(edmType, "edmType");
return edmType.GetType().Name == "EnumType";
}
public PrimitiveType GetEnumUnderlyingType(EdmType enumType)
{
ArgumentNotNull(enumType, "enumType");
return (PrimitiveType)enumType.GetType().GetProperty("UnderlyingType").GetValue(enumType, null);
}
public string CreateLiteral(object value)
{
if (value == null || value.GetType() != typeof(TimeSpan))
{
return _code.CreateLiteral(value);
}
return string.Format(CultureInfo.InvariantCulture, "new TimeSpan({0})", ((TimeSpan)value).Ticks);
}
public bool VerifyCaseInsensitiveTypeUniqueness(IEnumerable<string> types, string sourceFile)
{
ArgumentNotNull(types, "types");
ArgumentNotNull(sourceFile, "sourceFile");
var hash = new HashSet<string>(StringComparer.InvariantCultureIgnoreCase);
if (types.Any(item => !hash.Add(item)))
{
_errors.Add(
new CompilerError(sourceFile, -1, -1, "6023",
String.Format(CultureInfo.CurrentCulture, CodeGenerationTools.GetResourceString("Template_CaseInsensitiveTypeConflict"))));
return false;
}
return true;
}
public IEnumerable<SimpleType> GetEnumItemsToGenerate(IEnumerable<GlobalItem> itemCollection)
{
return GetItemsToGenerate<SimpleType>(itemCollection)
.Where(e => IsEnumType(e));
}
public IEnumerable<T> GetItemsToGenerate<T>(IEnumerable<GlobalItem> itemCollection) where T: EdmType
{
return itemCollection
.OfType<T>()
.Where(i => !i.MetadataProperties.Any(p => p.Name == ExternalTypeNameAttributeName))
.OrderBy(i => i.Name);
}
public IEnumerable<string> GetAllGlobalItems(IEnumerable<GlobalItem> itemCollection)
{
return itemCollection
.Where(i => i is EntityType || i is ComplexType || i is EntityContainer || IsEnumType(i))
.Select(g => GetGlobalItemName(g));
}
public string GetGlobalItemName(GlobalItem item)
{
if (item is EdmType)
{
return ((EdmType)item).Name;
}
else
{
return ((EntityContainer)item).Name;
}
}
public IEnumerable<EdmProperty> GetSimpleProperties(EntityType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == type);
}
public IEnumerable<EdmProperty> GetSimpleProperties(ComplexType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == type);
}
public IEnumerable<EdmProperty> GetComplexProperties(EntityType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == type);
}
public IEnumerable<EdmProperty> GetComplexProperties(ComplexType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == type);
}
public IEnumerable<EdmProperty> GetPropertiesWithDefaultValues(EntityType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == type && p.DefaultValue != null);
}
public IEnumerable<EdmProperty> GetPropertiesWithDefaultValues(ComplexType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == type && p.DefaultValue != null);
}
public IEnumerable<NavigationProperty> GetNavigationProperties(EntityType type)
{
return type.NavigationProperties.Where(np => np.DeclaringType == type);
}
public IEnumerable<NavigationProperty> GetCollectionNavigationProperties(EntityType type)
{
return type.NavigationProperties.Where(np => np.DeclaringType == type && np.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many);
}
public FunctionParameter GetReturnParameter(EdmFunction edmFunction)
{
ArgumentNotNull(edmFunction, "edmFunction");
var returnParamsProperty = edmFunction.GetType().GetProperty("ReturnParameters");
return returnParamsProperty == null
? edmFunction.ReturnParameter
: ((IEnumerable<FunctionParameter>)returnParamsProperty.GetValue(edmFunction, null)).FirstOrDefault();
}
public bool IsComposable(EdmFunction edmFunction)
{
ArgumentNotNull(edmFunction, "edmFunction");
var isComposableProperty = edmFunction.GetType().GetProperty("IsComposableAttribute");
return isComposableProperty != null && (bool)isComposableProperty.GetValue(edmFunction, null);
}
public IEnumerable<FunctionImportParameter> GetParameters(EdmFunction edmFunction)
{
return FunctionImportParameter.Create(edmFunction.Parameters, _code, _ef);
}
public TypeUsage GetReturnType(EdmFunction edmFunction)
{
var returnParam = GetReturnParameter(edmFunction);
return returnParam == null ? null : _ef.GetElementType(returnParam.TypeUsage);
}
public bool GenerateMergeOptionFunction(EdmFunction edmFunction, bool includeMergeOption)
{
var returnType = GetReturnType(edmFunction);
return !includeMergeOption && returnType != null && returnType.EdmType.BuiltInTypeKind == BuiltInTypeKind.EntityType;
}
}
public static void ArgumentNotNull<T>(T arg, string name) where T : class
{
if (arg == null)
{
throw new ArgumentNullException(name);
}
}
#>
希望它对某人有帮助。