context.Database.SqlQuery(typeof(Post), "SELECT * FROM dbo.Posts WHERE Author = @author", userSuppliedAuthor); }这里的SQL语句将查询Posts表,所以用到了typeof(Post)。如果JOIN语句来查询不同的两张表的话,就需要写一个内部类来返回SQL语句的查询结果。以下...
sql FormattableString The interpolated string representing a SQL query with parameters. Returns Int32 The number of rows affected. Attributes ObsoleteAttribute Applies to Entity Framework Core 3.1 and other versions ProductVersions (Obsolete) Entity Framework Core 2.0, 2.1, 2.2 (3...
{returndbSet.SqlQuery(query, parameters).ToList(); } 在“CourseController.cs”中在Details方法中调用此新方法,如下所示: publicActionResult Details(intid) {varquery ="SELECT * FROM Course WHERE CourseID = @p0";returnView(unitOfWork.CourseRepository.GetWithRawSql(query, id).Single()); } 或许...
在EF中我们可以通过Linq来操作实体类,但是有些时候我们必须通过原始sql语句或者存储过程来进行查询数据库,所以我们可以通过EF Code First来实现,但是SQL语句和存储过程无法进行映射,于是我们只能手动通过上下文中的SqlQuery和ExecuteSqlCommand来完成。 SqlQuery sql语句查询实体 通过DbSet中的SqlQuery方法来写原始sql语句返回...
This topic shows how to execute an Entity SQL query that has parameters by using an EntityCommand object. To run the code in this example Add the AdventureWorks Sales Model to your project and configure your project to use the Entity Framework. For more information, see How to: Use the Ent...
Query.SqlExpressions 程序集: Microsoft.EntityFrameworkCore.Relational.dll 包: Microsoft.EntityFrameworkCore.Relational v9.0.0 Source: SqlParameterExpression.cs 参数的名称。 C# 复制 public string Name { get; } 属性值 String 适用于 产品版本 Entity Framework Core 3.0, 3.1, 5.0,...
/// SQL命令 /// 参数 /// <returns>影响的记录数</returns> public Object[] ExecuteSqlNonQuery<T>(string commandText, params Object[] parameters) ...
Entity Framework Core2.1, 2.2 With(IParameterNameGeneratorFactory) 複製此相依性參數物件,並取代一個服務。 C# publicMicrosoft.EntityFrameworkCore.Query.Sql.QuerySqlGeneratorDependenciesWith(Microsoft.EntityFrameworkCore.Storage.IParameterNameGeneratorFactory parameterNameGeneratorFactory); ...
Service dependencies parameter class for Microsoft.EntityFrameworkCore.Query.Internal.RelationalParameterBasedSqlProcessorFactory This type is typically used by database providers (and other extensions). It is generally not used in application code. RelationalParameterBasedSqlProcessorParameters Parameters for...
sql String The SQL query string. parameters Object[] The parameters to apply to the SQL query string. If output parameters are used, their values will not be available until the results have been read completely. This is due to the underlying behavior of DbDataReader, seehttp://go.microsoft...