从 Where 表达式获取 SQL 查询
Get SQL query from Where expression
我有一个使用 EF6 上下文的 .Net Framework 控制台应用程序,我从中选择使用 mehdime 实体范围,并且我试图在我的程序中获得结果 SQL 查询。
我想获得生成的 SQL,它会从 WHERE 产生,但似乎找不到如何实现它(我的 google-fu 很弱,我'我可能问错了问题)。
代码:
list<int> mailIds = new List<int>(); //list of ids that might be in db
using(var dbScope = Contexts.Scope.Create())
{
var emails = Contexts.Mail.ResponseMail.Where(m => mailIds.Contains(m.Id));
//I'd like to get the query resulting from this WHERE in a text format so that I can save it somewhere
.....
}
Contexts.cs class:
using Mehdime.Entity;
....
class Contexts
{
public static IDbContextScopeFactory Scope { get; } = new DbContextScopeFactory();
private static IAmbientDbContextLocator Locator { get; } = new AmbientDbContextLocator();
public static MailContext Mail => Locator.Get<MailContext>();
....
}
和MailCotext.cs:
public class MailContext : DbContext
{
public MailContext() : base(nameof(MailContext))
{
Database.SetInitializer(new CreateDatabaseAndSyncEnums<MailContext>());
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
}
public DbSet<ResponseMessages> ResponseMail { get; set; }
}
您可以使用 ff:
从 EF 获取生成的查询
var emails = Contexts.Mail.ResponseMail.Where(m => mailIds.Contains(m.Id));
// using the IQueryable extract the query
var sql = ((System.Data.Entity.Core.Objects.ObjectQuery)emails)
.ToTraceString();
您可以为此创建一个扩展,这样您就可以轻松获得从 IQueryables 生成的查询。
我有一个使用 EF6 上下文的 .Net Framework 控制台应用程序,我从中选择使用 mehdime 实体范围,并且我试图在我的程序中获得结果 SQL 查询。
我想获得生成的 SQL,它会从 WHERE 产生,但似乎找不到如何实现它(我的 google-fu 很弱,我'我可能问错了问题)。
代码:
list<int> mailIds = new List<int>(); //list of ids that might be in db
using(var dbScope = Contexts.Scope.Create())
{
var emails = Contexts.Mail.ResponseMail.Where(m => mailIds.Contains(m.Id));
//I'd like to get the query resulting from this WHERE in a text format so that I can save it somewhere
.....
}
Contexts.cs class:
using Mehdime.Entity;
....
class Contexts
{
public static IDbContextScopeFactory Scope { get; } = new DbContextScopeFactory();
private static IAmbientDbContextLocator Locator { get; } = new AmbientDbContextLocator();
public static MailContext Mail => Locator.Get<MailContext>();
....
}
和MailCotext.cs:
public class MailContext : DbContext
{
public MailContext() : base(nameof(MailContext))
{
Database.SetInitializer(new CreateDatabaseAndSyncEnums<MailContext>());
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
}
public DbSet<ResponseMessages> ResponseMail { get; set; }
}
您可以使用 ff:
从 EF 获取生成的查询var emails = Contexts.Mail.ResponseMail.Where(m => mailIds.Contains(m.Id));
// using the IQueryable extract the query
var sql = ((System.Data.Entity.Core.Objects.ObjectQuery)emails)
.ToTraceString();
您可以为此创建一个扩展,这样您就可以轻松获得从 IQueryables 生成的查询。