没有Foreach你也能做到

dataDB.Table.RemoveRange(dataDB.Table);
dataDB.SaveChanges();

这将删除所有行

using (var context = new DataDb())
{
     var ctx = ((System.Data.Entity.Infrastructure.IObjectContextAdapter)context).ObjectContext;
     ctx.ExecuteStoreCommand("DELETE FROM [TableName] WHERE Name= {0}", Name);
}

or

using (var context = new DataDb())
{
     context.Database.ExecuteSqlCommand("TRUNCATE TABLE [TableName]");
}

这对我很有用……EF v3.1.5

context.ModelName.RemoveRange(context.ModelName.ToList());
context.SaveChanges();

如果您希望清除整个数据库。

由于外键的限制，截断表的顺序很重要。这是一种强行执行这个序列的方法。

    public static void ClearDatabase<T>() where T : DbContext, new()
    {
        using (var context = new T())
        {
            var tableNames = context.Database.SqlQuery<string>("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'BASE TABLE' AND TABLE_NAME NOT LIKE '%Migration%'").ToList();
            foreach (var tableName in tableNames)
            {
                foreach (var t in tableNames)
                {
                    try
                    {

                        if (context.Database.ExecuteSqlCommand(string.Format("TRUNCATE TABLE [{0}]", tableName)) == 1)
                            break;

                    }
                    catch (Exception ex)
                    {

                    }
                }
            }

            context.SaveChanges();
        }
    }

用法:

ClearDatabase<ApplicationDbContext>();

记住在此之后重新实例化DbContext。

var data = (from n in db.users select n);
db.users.RemoveRange(data);
db.SaveChanges();

Ef Core 3.1及以上

 _context.Database.ExecuteSqlRaw($"TRUNCATE TABLE 
     {_context.Warehouse.EntityType.GetSchema()}. 
     {_context.Warehouse.EntityType.GetTableName()}");

仓库是dbSet