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School 模型

  • 项目

本主题包含 School 示例数据库的概念模型、存储模型和映射信息。 若要创建 School 数据库，请参见创建 School 示例数据库。

School 模型用于实体框架和实体数据模型工具文档的示例代码中。 概念模型、存储模型和映射信息分别以概念架构定义语言 (CSDL)、存储架构定义语言 (SSDL) 和映射规范语言 (MSL) 表示。 创建存储模型、概念模型和映射的建议方法是使用Entity Data Model Wizard或 edmgen.exe 命令行工具。

Bb896300.note(zh-cn,VS.100).gif注意：
有关使用实体数据模型设计器扩展 School 模型的信息，请参见 ADO.NET Entity Data Model Designer Scenarios。

模型和映射定义

下面的代码包含 School 模型的概念内容、存储内容和映射内容。

<!-- SSDL content -->
<edmx:StorageModels>
  <Schema Namespace="SchoolModel.Store" Alias="Self" Provider="System.Data.SqlClient" 
          ProviderManifestToken="2005" 
          xmlns:store="https://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" 
          xmlns="https://schemas.microsoft.com/ado/2009/02/edm/ssdl">
    <EntityContainer Name="SchoolModelStoreContainer">
      <EntitySet Name="Course" EntityType="SchoolModel.Store.Course" 
                 store:Type="Tables" Schema="dbo" />
      <EntitySet Name="CourseInstructor" EntityType="SchoolModel.Store.CourseInstructor" 
                 store:Type="Tables" Schema="dbo" />
      <EntitySet Name="Department" EntityType="SchoolModel.Store.Department" 
                 store:Type="Tables" Schema="dbo" />
      <EntitySet Name="OfficeAssignment" EntityType="SchoolModel.Store.OfficeAssignment" 
                 store:Type="Tables" Schema="dbo" />
      <EntitySet Name="OnlineCourse" EntityType="SchoolModel.Store.OnlineCourse" 
                 store:Type="Tables" Schema="dbo" />
      <EntitySet Name="OnsiteCourse" EntityType="SchoolModel.Store.OnsiteCourse" 
                 store:Type="Tables" Schema="dbo" />
      <EntitySet Name="Person" EntityType="SchoolModel.Store.Person" 
                 store:Type="Tables" Schema="dbo" />
      <EntitySet Name="StudentGrade" EntityType="SchoolModel.Store.StudentGrade" 
                 store:Type="Tables" Schema="dbo" />
      <AssociationSet Name="FK_Course_Department" 
                      Association="SchoolModel.Store.FK_Course_Department">
        <End Role="Department" EntitySet="Department" />
        <End Role="Course" EntitySet="Course" />
      </AssociationSet>
      <AssociationSet Name="FK_CourseInstructor_Course" 
                      Association="SchoolModel.Store.FK_CourseInstructor_Course">
        <End Role="Course" EntitySet="Course" />
        <End Role="CourseInstructor" EntitySet="CourseInstructor" />
      </AssociationSet>
      <AssociationSet Name="FK_CourseInstructor_Person" 
                      Association="SchoolModel.Store.FK_CourseInstructor_Person">
        <End Role="Person" EntitySet="Person" />
        <End Role="CourseInstructor" EntitySet="CourseInstructor" />
      </AssociationSet>
      <AssociationSet Name="FK_OfficeAssignment_Person" 
                      Association="SchoolModel.Store.FK_OfficeAssignment_Person">
        <End Role="Person" EntitySet="Person" />
        <End Role="OfficeAssignment" EntitySet="OfficeAssignment" />
      </AssociationSet>
      <AssociationSet Name="FK_OnlineCourse_Course" 
                      Association="SchoolModel.Store.FK_OnlineCourse_Course">
        <End Role="Course" EntitySet="Course" />
        <End Role="OnlineCourse" EntitySet="OnlineCourse" />
      </AssociationSet>
      <AssociationSet Name="FK_OnsiteCourse_Course" 
                      Association="SchoolModel.Store.FK_OnsiteCourse_Course">
        <End Role="Course" EntitySet="Course" />
        <End Role="OnsiteCourse" EntitySet="OnsiteCourse" />
      </AssociationSet>
      <AssociationSet Name="FK_StudentGrade_Course" 
                      Association="SchoolModel.Store.FK_StudentGrade_Course">
        <End Role="Course" EntitySet="Course" />
        <End Role="StudentGrade" EntitySet="StudentGrade" />
      </AssociationSet>
      <AssociationSet Name="FK_StudentGrade_Student" 
                      Association="SchoolModel.Store.FK_StudentGrade_Student">
        <End Role="Person" EntitySet="Person" />
        <End Role="StudentGrade" EntitySet="StudentGrade" />
      </AssociationSet>
    </EntityContainer>
    <EntityType Name="Course">
      <Key>
        <PropertyRef Name="CourseID" />
      </Key>
      <Property Name="CourseID" Type="int" Nullable="false" />
      <Property Name="Title" Type="nvarchar" Nullable="false" MaxLength="100" />
      <Property Name="Credits" Type="int" Nullable="false" />
      <Property Name="DepartmentID" Type="int" Nullable="false" />
    </EntityType>
    <EntityType Name="CourseInstructor">
      <Key>
        <PropertyRef Name="CourseID" />
        <PropertyRef Name="PersonID" />
      </Key>
      <Property Name="CourseID" Type="int" Nullable="false" />
      <Property Name="PersonID" Type="int" Nullable="false" />
    </EntityType>
    <EntityType Name="Department">
      <Key>
        <PropertyRef Name="DepartmentID" />
      </Key>
      <Property Name="DepartmentID" Type="int" Nullable="false" />
      <Property Name="Name" Type="nvarchar" Nullable="false" MaxLength="50" />
      <Property Name="Budget" Type="money" Nullable="false" />
      <Property Name="StartDate" Type="datetime" Nullable="false" />
      <Property Name="Administrator" Type="int" />
    </EntityType>
    <EntityType Name="OfficeAssignment">
      <Key>
        <PropertyRef Name="InstructorID" />
      </Key>
      <Property Name="InstructorID" Type="int" Nullable="false" />
      <Property Name="Location" Type="nvarchar" Nullable="false" MaxLength="50" />
      <Property Name="Timestamp" Type="timestamp" Nullable="false" 
                StoreGeneratedPattern="Computed" />
    </EntityType>
    <EntityType Name="OnlineCourse">
      <Key>
        <PropertyRef Name="CourseID" />
      </Key>
      <Property Name="CourseID" Type="int" Nullable="false" />
      <Property Name="URL" Type="nvarchar" Nullable="false" MaxLength="100" />
    </EntityType>
    <EntityType Name="OnsiteCourse">
      <Key>
        <PropertyRef Name="CourseID" />
      </Key>
      <Property Name="CourseID" Type="int" Nullable="false" />
      <Property Name="Location" Type="nvarchar" Nullable="false" MaxLength="50" />
      <Property Name="Days" Type="nvarchar" Nullable="false" MaxLength="50" />
      <Property Name="Time" Type="smalldatetime" Nullable="false" />
    </EntityType>
    <EntityType Name="Person">
      <Key>
        <PropertyRef Name="PersonID" />
      </Key>
      <Property Name="PersonID" Type="int" Nullable="false" 
                StoreGeneratedPattern="Identity" />
      <Property Name="LastName" Type="nvarchar" Nullable="false" MaxLength="50" />
      <Property Name="FirstName" Type="nvarchar" Nullable="false" MaxLength="50" />
      <Property Name="HireDate" Type="datetime" />
      <Property Name="EnrollmentDate" Type="datetime" />
    </EntityType>
    <EntityType Name="StudentGrade">
      <Key>
        <PropertyRef Name="EnrollmentID" />
      </Key>
      <Property Name="EnrollmentID" Type="int" Nullable="false" 
                StoreGeneratedPattern="Identity" />
      <Property Name="CourseID" Type="int" Nullable="false" />
      <Property Name="StudentID" Type="int" Nullable="false" />
      <Property Name="Grade" Type="decimal" Precision="3" Scale="2" />
    </EntityType>
    <Association Name="FK_Course_Department">
      <End Role="Department" Type="SchoolModel.Store.Department" Multiplicity="1" />
      <End Role="Course" Type="SchoolModel.Store.Course" Multiplicity="*" />
      <ReferentialConstraint>
        <Principal Role="Department">
          <PropertyRef Name="DepartmentID" />
        </Principal>
        <Dependent Role="Course">
          <PropertyRef Name="DepartmentID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_CourseInstructor_Course">
      <End Role="Course" Type="SchoolModel.Store.Course" Multiplicity="1" />
      <End Role="CourseInstructor" Type="SchoolModel.Store.CourseInstructor" Multiplicity="*" />
      <ReferentialConstraint>
        <Principal Role="Course">
          <PropertyRef Name="CourseID" />
        </Principal>
        <Dependent Role="CourseInstructor">
          <PropertyRef Name="CourseID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_CourseInstructor_Person">
      <End Role="Person" Type="SchoolModel.Store.Person" Multiplicity="1" />
      <End Role="CourseInstructor" Type="SchoolModel.Store.CourseInstructor" Multiplicity="*" />
      <ReferentialConstraint>
        <Principal Role="Person">
          <PropertyRef Name="PersonID" />
        </Principal>
        <Dependent Role="CourseInstructor">
          <PropertyRef Name="PersonID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_OfficeAssignment_Person">
      <End Role="Person" Type="SchoolModel.Store.Person" Multiplicity="1" />
      <End Role="OfficeAssignment" Type="SchoolModel.Store.OfficeAssignment" Multiplicity="0..1" />
      <ReferentialConstraint>
        <Principal Role="Person">
          <PropertyRef Name="PersonID" />
        </Principal>
        <Dependent Role="OfficeAssignment">
          <PropertyRef Name="InstructorID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_OnlineCourse_Course">
      <End Role="Course" Type="SchoolModel.Store.Course" Multiplicity="1" />
      <End Role="OnlineCourse" Type="SchoolModel.Store.OnlineCourse" Multiplicity="0..1" />
      <ReferentialConstraint>
        <Principal Role="Course">
          <PropertyRef Name="CourseID" />
        </Principal>
        <Dependent Role="OnlineCourse">
          <PropertyRef Name="CourseID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_OnsiteCourse_Course">
      <End Role="Course" Type="SchoolModel.Store.Course" Multiplicity="1" />
      <End Role="OnsiteCourse" Type="SchoolModel.Store.OnsiteCourse" Multiplicity="0..1" />
      <ReferentialConstraint>
        <Principal Role="Course">
          <PropertyRef Name="CourseID" />
        </Principal>
        <Dependent Role="OnsiteCourse">
          <PropertyRef Name="CourseID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_StudentGrade_Course">
      <End Role="Course" Type="SchoolModel.Store.Course" Multiplicity="1" />
      <End Role="StudentGrade" Type="SchoolModel.Store.StudentGrade" Multiplicity="*" />
      <ReferentialConstraint>
        <Principal Role="Course">
          <PropertyRef Name="CourseID" />
        </Principal>
        <Dependent Role="StudentGrade">
          <PropertyRef Name="CourseID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_StudentGrade_Student">
      <End Role="Person" Type="SchoolModel.Store.Person" Multiplicity="1" />
      <End Role="StudentGrade" Type="SchoolModel.Store.StudentGrade" Multiplicity="*" />
      <ReferentialConstraint>
        <Principal Role="Person">
          <PropertyRef Name="PersonID" />
        </Principal>
        <Dependent Role="StudentGrade">
          <PropertyRef Name="StudentID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Function Name="DeleteOfficeAssignment" Aggregate="false" BuiltIn="false" 
              NiladicFunction="false" IsComposable="false" 
              ParameterTypeSemantics="AllowImplicitConversion" Schema="dbo">
      <Parameter Name="InstructorID" Type="int" Mode="In" />
    </Function>
    <Function Name="DeletePerson" Aggregate="false" BuiltIn="false" 
              NiladicFunction="false" IsComposable="false" 
              ParameterTypeSemantics="AllowImplicitConversion" Schema="dbo">
      <Parameter Name="PersonID" Type="int" Mode="In" />
    </Function>
<Function Name="GetDepartmentName" Aggregate="false" BuiltIn="false" 
              NiladicFunction="false" IsComposable="false" 
              ParameterTypeSemantics="AllowImplicitConversion" Schema="dbo">
      <Parameter Name="ID" Type="int" Mode="In" />
      <Parameter Name="Name" Type="nvarchar" Mode="InOut" />
    </Function>
    <Function Name="GetStudentGrades" Aggregate="false" BuiltIn="false" 
              NiladicFunction="false" IsComposable="false" 
              ParameterTypeSemantics="AllowImplicitConversion" Schema="dbo">
      <Parameter Name="StudentID" Type="int" Mode="In" />
    </Function>
    <Function Name="InsertOfficeAssignment" Aggregate="false" BuiltIn="false" 
              NiladicFunction="false" IsComposable="false" 
              ParameterTypeSemantics="AllowImplicitConversion" Schema="dbo">
      <Parameter Name="InstructorID" Type="int" Mode="In" />
      <Parameter Name="Location" Type="nvarchar" Mode="In" />
    </Function>
    <Function Name="InsertPerson" Aggregate="false" BuiltIn="false" 
              NiladicFunction="false" IsComposable="false" 
              ParameterTypeSemantics="AllowImplicitConversion" Schema="dbo">
      <Parameter Name="LastName" Type="nvarchar" Mode="In" />
      <Parameter Name="FirstName" Type="nvarchar" Mode="In" />
      <Parameter Name="HireDate" Type="datetime" Mode="In" />
      <Parameter Name="EnrollmentDate" Type="datetime" Mode="In" />
    </Function>
    <Function Name="UpdateOfficeAssignment" Aggregate="false" BuiltIn="false" 
              NiladicFunction="false" IsComposable="false" 
              ParameterTypeSemantics="AllowImplicitConversion" Schema="dbo">
      <Parameter Name="InstructorID" Type="int" Mode="In" />
      <Parameter Name="Location" Type="nvarchar" Mode="In" />
      <Parameter Name="OrigTimestamp" Type="timestamp" Mode="In" />
    </Function>
    <Function Name="UpdatePerson" Aggregate="false" BuiltIn="false" 
              NiladicFunction="false" IsComposable="false" 
              ParameterTypeSemantics="AllowImplicitConversion" Schema="dbo">
      <Parameter Name="PersonID" Type="int" Mode="In" />
      <Parameter Name="LastName" Type="nvarchar" Mode="In" />
      <Parameter Name="FirstName" Type="nvarchar" Mode="In" />
      <Parameter Name="HireDate" Type="datetime" Mode="In" />
      <Parameter Name="EnrollmentDate" Type="datetime" Mode="In" />
    </Function>
  </Schema>
</edmx:StorageModels>
<!-- CSDL content -->
<edmx:ConceptualModels>
  <Schema Namespace="SchoolModel" Alias="Self" 
          xmlns:annotation="https://schemas.microsoft.com/ado/2009/02/edm/annotation" 
          xmlns="https://schemas.microsoft.com/ado/2008/09/edm">
    <EntityContainer Name="SchoolEntities">
      <EntitySet Name="Courses" EntityType="SchoolModel.Course" />
      <EntitySet Name="Departments" EntityType="SchoolModel.Department" />
      <EntitySet Name="OfficeAssignments" EntityType="SchoolModel.OfficeAssignment" />
      <EntitySet Name="OnlineCourses" EntityType="SchoolModel.OnlineCourse" />
      <EntitySet Name="OnsiteCourses" EntityType="SchoolModel.OnsiteCourse" />
      <EntitySet Name="People" EntityType="SchoolModel.Person" />
      <EntitySet Name="StudentGrades" EntityType="SchoolModel.StudentGrade" />
      <AssociationSet Name="FK_Course_Department" 
                      Association="SchoolModel.FK_Course_Department">
        <End Role="Department" EntitySet="Departments" />
        <End Role="Course" EntitySet="Courses" />
      </AssociationSet>
      <AssociationSet Name="FK_OnlineCourse_Course" 
                      Association="SchoolModel.FK_OnlineCourse_Course">
        <End Role="Course" EntitySet="Courses" />
        <End Role="OnlineCourse" EntitySet="OnlineCourses" />
      </AssociationSet>
      <AssociationSet Name="FK_OnsiteCourse_Course" 
                      Association="SchoolModel.FK_OnsiteCourse_Course">
        <End Role="Course" EntitySet="Courses" />
        <End Role="OnsiteCourse" EntitySet="OnsiteCourses" />
      </AssociationSet>
      <AssociationSet Name="FK_StudentGrade_Course" 
                      Association="SchoolModel.FK_StudentGrade_Course">
        <End Role="Course" EntitySet="Courses" />
        <End Role="StudentGrade" EntitySet="StudentGrades" />
      </AssociationSet>
      <AssociationSet Name="FK_OfficeAssignment_Person" 
                      Association="SchoolModel.FK_OfficeAssignment_Person">
        <End Role="Person" EntitySet="People" />
        <End Role="OfficeAssignment" EntitySet="OfficeAssignments" />
      </AssociationSet>
      <AssociationSet Name="FK_StudentGrade_Student" 
                      Association="SchoolModel.FK_StudentGrade_Student">
        <End Role="Person" EntitySet="People" />
        <End Role="StudentGrade" EntitySet="StudentGrades" />
      </AssociationSet>
      <AssociationSet Name="CourseInstructor" 
                      Association="SchoolModel.CourseInstructor">
        <End Role="Course" EntitySet="Courses" />
        <End Role="Person" EntitySet="People" />
      </AssociationSet>
    </EntityContainer>
    <EntityType Name="Course">
      <Key>
        <PropertyRef Name="CourseID" />
      </Key>
      <Property Name="CourseID" Type="Int32" Nullable="false" />
      <Property Name="Title" Type="String" Nullable="false" 
                MaxLength="100" Unicode="true" FixedLength="false" />
      <Property Name="Credits" Type="Int32" Nullable="false" />
      <Property Name="DepartmentID" Type="Int32" Nullable="false" />
      <NavigationProperty Name="Department" 
                          Relationship="SchoolModel.FK_Course_Department" 
                          FromRole="Course" ToRole="Department" />
      <NavigationProperty Name="OnlineCourse" 
                          Relationship="SchoolModel.FK_OnlineCourse_Course" 
                          FromRole="Course" ToRole="OnlineCourse" />
      <NavigationProperty Name="OnsiteCourse" 
                          Relationship="SchoolModel.FK_OnsiteCourse_Course" 
                          FromRole="Course" ToRole="OnsiteCourse" />
      <NavigationProperty Name="StudentGrades" 
                          Relationship="SchoolModel.FK_StudentGrade_Course" 
                          FromRole="Course" ToRole="StudentGrade" />
      <NavigationProperty Name="People" 
                          Relationship="SchoolModel.CourseInstructor" 
                          FromRole="Course" ToRole="Person" />
    </EntityType>
    <EntityType Name="Department">
      <Key>
        <PropertyRef Name="DepartmentID" />
      </Key>
      <Property Name="DepartmentID" Type="Int32" Nullable="false" />
      <Property Name="Name" Type="String" Nullable="false" MaxLength="50" 
                Unicode="true" FixedLength="false" />
      <Property Name="Budget" Type="Decimal" Nullable="false" Precision="19" Scale="4" />
      <Property Name="StartDate" Type="DateTime" Nullable="false" />
      <Property Name="Administrator" Type="Int32" />
      <NavigationProperty Name="Courses" 
                          Relationship="SchoolModel.FK_Course_Department" 
                          FromRole="Department" ToRole="Course" />
    </EntityType>
    <EntityType Name="OfficeAssignment">
      <Key>
        <PropertyRef Name="InstructorID" />
      </Key>
      <Property Name="InstructorID" Type="Int32" Nullable="false" />
      <Property Name="Location" Type="String" Nullable="false" MaxLength="50" 
                Unicode="true" FixedLength="false" />
      <Property Name="Timestamp" Type="Binary" Nullable="false" MaxLength="8" 
                FixedLength="true" annotation:StoreGeneratedPattern="Computed" />
      <NavigationProperty Name="Person" 
                          Relationship="SchoolModel.FK_OfficeAssignment_Person" 
                          FromRole="OfficeAssignment" ToRole="Person" />
    </EntityType>
    <EntityType Name="OnlineCourse">
      <Key>
        <PropertyRef Name="CourseID" />
      </Key>
      <Property Name="CourseID" Type="Int32" Nullable="false" />
      <Property Name="URL" Type="String" Nullable="false" MaxLength="100" 
                Unicode="true" FixedLength="false" />
      <NavigationProperty Name="Course" 
                          Relationship="SchoolModel.FK_OnlineCourse_Course" 
                          FromRole="OnlineCourse" ToRole="Course" />
    </EntityType>
    <EntityType Name="OnsiteCourse">
      <Key>
        <PropertyRef Name="CourseID" />
      </Key>
      <Property Name="CourseID" Type="Int32" Nullable="false" />
      <Property Name="Location" Type="String" Nullable="false" MaxLength="50" 
                Unicode="true" FixedLength="false" />
      <Property Name="Days" Type="String" Nullable="false" MaxLength="50" 
                Unicode="true" FixedLength="false" />
      <Property Name="Time" Type="DateTime" Nullable="false" />
      <NavigationProperty Name="Course" 
                          Relationship="SchoolModel.FK_OnsiteCourse_Course" 
                          FromRole="OnsiteCourse" ToRole="Course" />
    </EntityType>
    <EntityType Name="Person">
      <Key>
        <PropertyRef Name="PersonID" />
      </Key>
      <Property Name="PersonID" Type="Int32" Nullable="false" 
                annotation:StoreGeneratedPattern="Identity" />
      <Property Name="LastName" Type="String" Nullable="false" MaxLength="50" 
                Unicode="true" FixedLength="false" />
      <Property Name="FirstName" Type="String" Nullable="false" MaxLength="50" 
                Unicode="true" FixedLength="false" />
      <Property Name="HireDate" Type="DateTime" />
      <Property Name="EnrollmentDate" Type="DateTime" />
      <NavigationProperty Name="OfficeAssignment" 
                          Relationship="SchoolModel.FK_OfficeAssignment_Person" 
                          FromRole="Person" ToRole="OfficeAssignment" />
      <NavigationProperty Name="StudentGrades" 
                          Relationship="SchoolModel.FK_StudentGrade_Student" 
                          FromRole="Person" ToRole="StudentGrade" />
      <NavigationProperty Name="Courses" 
                          Relationship="SchoolModel.CourseInstructor" 
                          FromRole="Person" ToRole="Course" />
    </EntityType>
    <EntityType Name="StudentGrade">
      <Key>
        <PropertyRef Name="EnrollmentID" />
      </Key>
      <Property Name="EnrollmentID" Type="Int32" Nullable="false" 
                annotation:StoreGeneratedPattern="Identity" />
      <Property Name="CourseID" Type="Int32" Nullable="false" />
      <Property Name="StudentID" Type="Int32" Nullable="false" />
      <Property Name="Grade" Type="Decimal" Precision="3" Scale="2" />
      <NavigationProperty Name="Course" 
                          Relationship="SchoolModel.FK_StudentGrade_Course" 
                          FromRole="StudentGrade" ToRole="Course" />
      <NavigationProperty Name="Person" 
                          Relationship="SchoolModel.FK_StudentGrade_Student" 
                          FromRole="StudentGrade" ToRole="Person" />
    </EntityType>
    <Association Name="FK_Course_Department">
      <End Role="Department" Type="SchoolModel.Department" Multiplicity="1" />
      <End Role="Course" Type="SchoolModel.Course" Multiplicity="*" />
      <ReferentialConstraint>
        <Principal Role="Department">
          <PropertyRef Name="DepartmentID" />
        </Principal>
        <Dependent Role="Course">
          <PropertyRef Name="DepartmentID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_OnlineCourse_Course">
      <End Role="Course" Type="SchoolModel.Course" Multiplicity="1" />
      <End Role="OnlineCourse" Type="SchoolModel.OnlineCourse" Multiplicity="0..1" />
      <ReferentialConstraint>
        <Principal Role="Course">
          <PropertyRef Name="CourseID" />
        </Principal>
        <Dependent Role="OnlineCourse">
          <PropertyRef Name="CourseID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_OnsiteCourse_Course">
      <End Role="Course" Type="SchoolModel.Course" Multiplicity="1" />
      <End Role="OnsiteCourse" Type="SchoolModel.OnsiteCourse" Multiplicity="0..1" />
      <ReferentialConstraint>
        <Principal Role="Course">
          <PropertyRef Name="CourseID" />
        </Principal>
        <Dependent Role="OnsiteCourse">
          <PropertyRef Name="CourseID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_StudentGrade_Course">
      <End Role="Course" Type="SchoolModel.Course" Multiplicity="1" />
      <End Role="StudentGrade" Type="SchoolModel.StudentGrade" Multiplicity="*" />
      <ReferentialConstraint>
        <Principal Role="Course">
          <PropertyRef Name="CourseID" />
        </Principal>
        <Dependent Role="StudentGrade">
          <PropertyRef Name="CourseID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_OfficeAssignment_Person">
      <End Role="Person" Type="SchoolModel.Person" Multiplicity="1" />
      <End Role="OfficeAssignment" Type="SchoolModel.OfficeAssignment" Multiplicity="0..1" />
      <ReferentialConstraint>
        <Principal Role="Person">
          <PropertyRef Name="PersonID" />
        </Principal>
        <Dependent Role="OfficeAssignment">
          <PropertyRef Name="InstructorID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="FK_StudentGrade_Student">
      <End Role="Person" Type="SchoolModel.Person" Multiplicity="1" />
      <End Role="StudentGrade" Type="SchoolModel.StudentGrade" Multiplicity="*" />
      <ReferentialConstraint>
        <Principal Role="Person">
          <PropertyRef Name="PersonID" />
        </Principal>
        <Dependent Role="StudentGrade">
          <PropertyRef Name="StudentID" />
        </Dependent>
      </ReferentialConstraint>
    </Association>
    <Association Name="CourseInstructor">
      <End Role="Course" Type="SchoolModel.Course" Multiplicity="*" />
      <End Role="Person" Type="SchoolModel.Person" Multiplicity="*" />
    </Association>
  </Schema>
</edmx:ConceptualModels>
<!-- C-S mapping content -->
<edmx:Mappings>
  <Mapping Space="C-S" xmlns="https://schemas.microsoft.com/ado/2008/09/mapping/cs">
    <EntityContainerMapping StorageEntityContainer="SchoolModelStoreContainer" 
                            CdmEntityContainer="SchoolEntities">
      <EntitySetMapping Name="Courses">
        <EntityTypeMapping TypeName="SchoolModel.Course">
          <MappingFragment StoreEntitySet="Course">
            <ScalarProperty Name="CourseID" ColumnName="CourseID" />
            <ScalarProperty Name="Title" ColumnName="Title" />
            <ScalarProperty Name="Credits" ColumnName="Credits" />
            <ScalarProperty Name="DepartmentID" ColumnName="DepartmentID" />
          </MappingFragment>
        </EntityTypeMapping>
      </EntitySetMapping>
      <EntitySetMapping Name="Departments">
        <EntityTypeMapping TypeName="SchoolModel.Department">
          <MappingFragment StoreEntitySet="Department">
            <ScalarProperty Name="DepartmentID" ColumnName="DepartmentID" />
            <ScalarProperty Name="Name" ColumnName="Name" />
            <ScalarProperty Name="Budget" ColumnName="Budget" />
            <ScalarProperty Name="StartDate" ColumnName="StartDate" />
            <ScalarProperty Name="Administrator" ColumnName="Administrator" />
          </MappingFragment>
        </EntityTypeMapping>
      </EntitySetMapping>
      <EntitySetMapping Name="OfficeAssignments">
        <EntityTypeMapping TypeName="SchoolModel.OfficeAssignment">
          <MappingFragment StoreEntitySet="OfficeAssignment">
            <ScalarProperty Name="InstructorID" ColumnName="InstructorID" />
            <ScalarProperty Name="Location" ColumnName="Location" />
            <ScalarProperty Name="Timestamp" ColumnName="Timestamp" />
          </MappingFragment>
        </EntityTypeMapping>
      </EntitySetMapping>
      <EntitySetMapping Name="OnlineCourses">
        <EntityTypeMapping TypeName="SchoolModel.OnlineCourse">
          <MappingFragment StoreEntitySet="OnlineCourse">
            <ScalarProperty Name="CourseID" ColumnName="CourseID" />
            <ScalarProperty Name="URL" ColumnName="URL" />
          </MappingFragment>
        </EntityTypeMapping>
      </EntitySetMapping>
      <EntitySetMapping Name="OnsiteCourses">
        <EntityTypeMapping TypeName="SchoolModel.OnsiteCourse">
          <MappingFragment StoreEntitySet="OnsiteCourse">
            <ScalarProperty Name="CourseID" ColumnName="CourseID" />
            <ScalarProperty Name="Location" ColumnName="Location" />
            <ScalarProperty Name="Days" ColumnName="Days" />
            <ScalarProperty Name="Time" ColumnName="Time" />
          </MappingFragment>
        </EntityTypeMapping>
      </EntitySetMapping>
      <EntitySetMapping Name="People">
        <EntityTypeMapping TypeName="SchoolModel.Person">
          <MappingFragment StoreEntitySet="Person">
            <ScalarProperty Name="PersonID" ColumnName="PersonID" />
            <ScalarProperty Name="LastName" ColumnName="LastName" />
            <ScalarProperty Name="FirstName" ColumnName="FirstName" />
            <ScalarProperty Name="HireDate" ColumnName="HireDate" />
            <ScalarProperty Name="EnrollmentDate" ColumnName="EnrollmentDate" />
          </MappingFragment>
        </EntityTypeMapping>
      </EntitySetMapping>
      <EntitySetMapping Name="StudentGrades">
        <EntityTypeMapping TypeName="SchoolModel.StudentGrade">
          <MappingFragment StoreEntitySet="StudentGrade">
            <ScalarProperty Name="EnrollmentID" ColumnName="EnrollmentID" />
            <ScalarProperty Name="CourseID" ColumnName="CourseID" />
            <ScalarProperty Name="StudentID" ColumnName="StudentID" />
            <ScalarProperty Name="Grade" ColumnName="Grade" />
          </MappingFragment>
        </EntityTypeMapping>
      </EntitySetMapping>
      <AssociationSetMapping Name="CourseInstructor" 
                             TypeName="SchoolModel.CourseInstructor" 
                             StoreEntitySet="CourseInstructor">
        <EndProperty Name="Course">
          <ScalarProperty Name="CourseID" ColumnName="CourseID" />
        </EndProperty>
        <EndProperty Name="Person">
          <ScalarProperty Name="PersonID" ColumnName="PersonID" />
        </EndProperty>
      </AssociationSetMapping>
    </EntityContainerMapping>
  </Mapping>
</edmx:Mappings>

School 模型的连接字符串

下面是 School 模型的一个示例连接字符串，该字符串存储在应用程序配置文件中。 有关更多信息，请参见连接字符串（实体框架）。

<configuration>
  <connectionStrings>
    <add name="SchoolEntities" 
         connectionString="metadata=res://*/School.csdl|res://*/School.ssdl|res://*/School.msl;
         provider=System.Data.SqlClient;provider connection string='Data Source=localhost;
         Initial Catalog=School;Integrated Security=True;MultipleActiveResultSets=True'" 
         providerName="System.Data.EntityClient" />
  </connectionStrings>
</configuration>

另请参见

概念

ADO.NET 实体框架

其他资源

入门（实体框架）
ADO.NET Entity Data Model Tools
.edmx File Overview