Obtenir la valeur de retour d'une procédure stockée
J'utilise Entity Framework 5 avec l'approche Code First. J'ai besoin de lire la valeur de retour d'une procédure stockée; Je suis déjà en train de lire les paramètres de sortie et d’envoyer les paramètres d’entrée, mais je ne sais pas comment lire la valeur de retour.
C'est possible?
Voici le code que j'utilise pour appeler la procédure stockée:
var outParam = new SqlParameter();
outParam.ParameterName = "@StatusLog";
outParam.SqlDbType = SqlDbType.NVarChar;
outParam.Size = 4000;
outParam.Direction = ParameterDirection.Output;
var code = new SqlParameter();
code.ParameterName = "@Code";
code.Direction = ParameterDirection.Input;
code.SqlDbType = SqlDbType.VarChar;
code.Size = 20;
code.Value = "123";
var data = _context.Database.SqlQuery<Item>("exec spItemData @Code, @StatusLog OUT", code, outParam);
var result = data.FirstOrDefault();
Je l'ai trouvé! Je peux lire la valeur de retour avec un paramètre de sortie qui doit être utilisé de cette façon:
// define a new output parameter
var returnCode = new SqlParameter();
returnCode.ParameterName = "@ReturnCode";
returnCode.SqlDbType = SqlDbType.Int;
returnCode.Direction = ParameterDirection.Output;
// assign the return code to the new output parameter and pass it to the sp
var data = _context.Database.SqlQuery<Item>("exec @ReturnCode = spItemData @Code, @StatusLog OUT", returnCode, code, outParam);
La solution fournie par Daniele ne fonctionnait pas pour moi, jusqu'à ce que je trouve ceci article de blog de Diego Vega , ce qui explique que:
Vous devrez lire l'intégralité des résultats avant de pouvoir accéder aux valeurs des paramètres de sortie (...). Ceci décrit le fonctionnement des procédures stockées et n'est pas spécifique à cette fonctionnalité EF.
De plus, dans mon cas, je ne renvoyais pas d'entité, je n'avais qu'à exécuter la procédure stockée. J'ai donc remplacé Item par object dans _context.Database.SqlQuery<object>.
Voici l exemple de code:
var code = new SqlParameter("@Code", 1);
var returnCode = new SqlParameter("@ReturnCode", SqlDbType.Int);
returnCode.Direction = ParameterDirection.Output;
var outParam = new SqlParameter("@StatusLog", SqlDbType.Int);
outParam.Direction = ParameterDirection.Output;
var sql = "exec @ReturnCode = spSomeRoutine @Code, @StatusLog OUT";
var data = _context.Database.SqlQuery<object>(sql, returnCode, code, outParam);
// Read the results so that the output variables are accessible
var item = data.FirstOrDefault();
var returnCodeValue = (int)returnCode.Value;
var outParamValue = (int)outParam.Value;
Voici un exemple de procédure stockée:
CREATE PROCEDURE [dbo].[spSomeRoutine]
@Code Int,
@StatusLog INT OUTPUT
AS
BEGIN
SET @StatusLog = 5
RETURN 10
END
Dans le cas où le proc stocké n'a pas de paramètre de sortie, je fais ce qui suit, ce qui crée effectivement du Sql qui retourne une instruction select;
var data = context.Database.SqlQuery<int>(@"declare @num int
exec @num = myStoredProcThatReturnsInt
select @num");
var result = data.First();
Pour ceux qui travaillent avec un fichier EDMX, vous pouvez ajouter un élément de génération de code, puis utiliser le code t4 suivant pour remplacer le fichier .Context.tt. Il créera tout le code pour mapper vos procédures stockées à l'aide de la méthode suivante:
var returnCode = new SqlParameter("@ReturnCode", SqlDbType.Int);
returnCode.Direction = ParameterDirection.Output;
var sql = "exec @ReturnCode = spSomeRoutine @Code, @StatusLog OUT";
var data = _context.Database.SqlQuery<object>(sql, returnCode, code, outParam);
Il utilisera SqlQuery <> lorsqu'il existe un résultat et ExecuteSqlCommand lorsqu'il ne l'est pas, mais dans les deux scénarios, SqlParameter localSqlExecReturnValue contiendra le code de retour int de l'appel de procédure stockée. Ceci peut être utilisé avec d'autres générateurs, il génère uniquement du code supplémentaire pour les appels de procédures stockées.
StoredProcedure.Context.tt:
<#@ template language="C#" debug="false" hostspecific="true"#>
<#@ include file="EF6.Utility.CS.ttinclude"#><#@
output extension=".cs"#><#
const string inputFile = @"CDMSAccountingModel.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 loader = new EdmMetadataLoader(textTransform.Host, textTransform.Errors);
var itemCollection = loader.CreateEdmItemCollection(inputFile);
var modelNamespace = loader.GetModelNamespace(inputFile);
var codeStringGenerator = new CodeStringGenerator(code, typeMapper, ef);
var container = itemCollection.OfType<EntityContainer>().FirstOrDefault();
if (container == null)
{
return string.Empty;
}
#>
//------------------------------------------------------------------------------
// <auto-generated>
// <#=CodeGenerationTools.GetResourceString("Template_GeneratedCodeCommentLine1")#>
//
// <#=CodeGenerationTools.GetResourceString("Template_GeneratedCodeCommentLine2")#>
// <#=CodeGenerationTools.GetResourceString("Template_GeneratedCodeCommentLine3")#>
// </auto-generated>
//------------------------------------------------------------------------------
<#
var codeNamespace = code.VsNamespaceSuggestion();
if (!String.IsNullOrEmpty(codeNamespace))
{
#>
namespace <#=code.EscapeNamespace(codeNamespace)#>
{
<#
PushIndent(" ");
}
#>
using System;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
<#
if (container.FunctionImports.Any())
{
#>
using System.Data.Entity.Core.Objects;
using System.Linq;
<#
}
#>
<#=Accessibility.ForType(container)#> partial class <#=code.Escape(container)#> : DbContext
{
<#
foreach (var entitySet in container.BaseEntitySets.OfType<EntitySet>())
{
// Note: the DbSet members are defined below such that the getter and
// setter always have the same accessibility as the DbSet definition
if (Accessibility.ForReadOnlyProperty(entitySet) != "public")
{
#>
<#=codeStringGenerator.DbSetInitializer(entitySet)#>
<#
}
}
#>
<#
foreach (var edmFunction in container.FunctionImports)
{
WriteFunctionImport(typeMapper, codeStringGenerator, edmFunction, modelNamespace, includeMergeOption: false);
}
#>
}
<#
if (!String.IsNullOrEmpty(codeNamespace))
{
PopIndent();
#>
}
<#
}
#>
<#+
private void WriteFunctionImport(TypeMapper typeMapper, CodeStringGenerator codeStringGenerator, EdmFunction edmFunction, string modelNamespace, bool includeMergeOption)
{
if (typeMapper.IsComposable(edmFunction))
{
#>
[DbFunction("<#=edmFunction.NamespaceName#>", "<#=edmFunction.Name#>")]
<#=codeStringGenerator.ComposableFunctionMethod(edmFunction, modelNamespace)#>
{
<#+
codeStringGenerator.WriteFunctionParameters(edmFunction, WriteFunctionParameter );
#>
<#=codeStringGenerator.ComposableCreateQuery(edmFunction, modelNamespace)#>
}
<#+
}
else
{
#>
<#=codeStringGenerator.FunctionMethod(edmFunction, modelNamespace, includeMergeOption)#>
{
<#+
codeStringGenerator.WriteFunctionParameters(edmFunction, WriteFunctionParameter);
#>
localSqlExecReturnValue = new System.Data.SqlClient.SqlParameter("@localExecReturnValue",System.Data.SqlDbType.Int);
localSqlExecReturnValue.Direction = System.Data.ParameterDirection.Output;
<#=codeStringGenerator.ExecuteFunction(edmFunction, modelNamespace, includeMergeOption)#>
}
<#+
if (typeMapper.GenerateMergeOptionFunction(edmFunction, includeMergeOption))
{
WriteFunctionImport(typeMapper, codeStringGenerator, edmFunction, modelNamespace, includeMergeOption: true);
}
}
}
public void WriteFunctionParameter(string name, string isNotNull, string notNullInit, string nullInit)
{
#>
var <#=name#> = <#=isNotNull#> ?
<#=notNullInit#> :
<#=nullInit#>;
<#+
}
public const string TemplateId = "CSharp_DbContext_Context_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; {4}set; }}",
Accessibility.ForProperty(edmProperty),
_typeMapper.GetTypeName(edmProperty.TypeUsage),
_code.Escape(edmProperty),
_code.SpaceAfter(Accessibility.ForGetter(edmProperty)),
_code.SpaceAfter(Accessibility.ForSetter(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)),
_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 System.Data.SqlClient.SqlParameter(\"@" + parameter.EsqlParameterName + "\", " + parameter.FunctionParameterName + ")";
var nullInit = "new System.Data.SqlClient.SqlParameter(\"@" + parameter.EsqlParameterName + "\", SqlHelper.GetDbType(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());
paramList = String.Join(",", paramList, " out System.Data.SqlClient.SqlParameter localSqlExecReturnValue").Trim().TrimStart(',');
paramList = paramList.Replace("ObjectParameter", "System.Data.SqlClient.SqlParameter");
if (includeMergeOption)
{
paramList = _code.StringAfter(paramList, ", ") + "MergeOption mergeOption";
}
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1} {2}({3})",
AccessibilityAndVirtual(Accessibility.ForMethod(edmFunction)),
returnType == null ? "int" : "System.Collections.Generic.List<" + _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 = String.Join(", ", parameters.Select(p => p.ExecuteParameterName).ToArray());
callParams = _code.StringBefore(", ", String.Join(",", "localSqlExecReturnValue", callParams)).TrimEnd(',').Trim();
var inSqlParams = String.Join(", ", parameters.Where(p => p.NeedsLocalVariable).Select(p => "@" + p.Source.Name).ToArray());
var outSqlParams = String.Join(", ", parameters.Where(p => !p.NeedsLocalVariable).Select(p => "@" + p.Source.Name + " OUTPUT").ToArray());
var sqlParams = "";
if (inSqlParams.Count() > 0)
{
sqlParams = String.Join(", ", sqlParams, inSqlParams);
}
if (outSqlParams.Count() > 0)
{
sqlParams = String.Join(", ", sqlParams, outSqlParams);
}
sqlParams = sqlParams.Trim().Trim(',').Trim();
if (includeMergeOption)
{
callParams = ", mergeOption" + callParams;
}
var retstring = string.Format(
CultureInfo.InvariantCulture,
"var results = {3}{0}(\"EXEC @localExecReturnValue = {1} {4}\"{2});",
returnType == null ? "" : "<" + _typeMapper.GetTypeName(returnType, modelNamespace) + ">",
edmFunction.Name,
callParams,returnType != null ? "this.Database.SqlQuery" : "this.Database.ExecuteSqlCommand", sqlParams);
retstring += Environment.NewLine;
retstring += returnType != null ? "\t\treturn results.ToList();" : "\t\treturn results;";
//retstring += Environment.NewLine + "\t\tlocalExecReturnValue = (int)localSqlExecReturnValue.Value;" ;
//retstring += Environment.NewLine + "\t\treturn results;";
return retstring;
}
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 DbSetInitializer(EntitySet entitySet)
{
return string.Format(
CultureInfo.InvariantCulture,
"{0} = Set<{1}>();",
_code.Escape(entitySet),
_typeMapper.GetTypeName(entitySet.ElementType));
}
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 static string FixNamespaces(string typeName)
{
return typeName.Replace("System.Data.Spatial.", "System.Data.Entity.Spatial.");
}
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 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);
}
}
#>
Vous pouvez ajouter la procédure stockée en tant que fonction EF, puis l'appeler indépendamment du contexte.
pour plus d'informations