Question

我有一个在localhost上运行良好的codefirst应用程序，但是Azure数据库存在问题。问题是我不能下载创建数据库。它给出了超时错误：

System.Data.SqlClient.SqlException：＆＃39;执行超时已过期。该在完成操作或之前经过的超时时间服务器没有响应。＆＃39;

我在dbcontext构造函数中尝试了以下内容：

public ApplicationDbContext() : base("DbSporter") {
    this.Database.CommandTimeout = 180;
    Database.SetInitializer(new DropCreateDatabaseAlways<ApplicationDbContext>());
}

但我无法增加命令超时。它在大约30秒后仍然会出错。

我还尝试从web.config增加命令超时和连接超时。没有工作。

我尝试了两种不同的连接字符串：

1）connectionString="Data Source=tcp:sportit.database.windows.net;Initial Catalog=Sporter;Integrated Security=False;User ID=sporter;Password=*****;Connect Timeout=180;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False"

2）connectionString="Data Source=tcp:sportit.database.windows.net;Initial Catalog=Sporter;Integrated Security=False;User ID=sporter;Password=*****;Connect Timeout=180;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False"

他们两个都有相同的结果。我是否应该知道如何使用EF codefirst创建azure数据库？

Answer 1

众所周知，ADO.NET connectionString如下所示：

Server = tcp：{your_sql_server_name} .database.windows.net，1433; Initial Catalog = {your_database_name}; Persist Security Info = False; User ID = {your_username}; Password = {your_password}; MultipleActiveResultSets = False; Encrypt = True; TrustServerCertificate = False;连接超时= 30;

根据您的描述，我创建了我的MVC网站应用程序并将数据库初始化程序设置为DropCreateDatabaseAlways来测试此问题。使用连接和命令的默认超时，我还可能遇到超时问题。然后，我尝试将超时增加到300秒，然后我可以删除并重新创建azure数据库。以下是代码段，您可以参考它们：

<强>的DbContext，初始化器，型号

{
    public class BruceDBContext : DbContext
    {
        public BruceDBContext() : base("name=defaultConnectionString")
        {
            this.Database.CommandTimeout = 300;
        }

        public virtual DbSet<Company> Companies { get; set; }
    }

    public class BruceInitializer : DropCreateDatabaseAlways<BruceDBContext>
    {
        protected override void Seed(BruceDBContext context)
        {
            var companies = new List<Company>
            {
                new Company { Name = "AAA", City = "Eindhoven", Streetname="Street 12" },
                new Company { Name = "BBB", City = "Rotterdam", Streetname = "Street 12" },
                new Company { Name = "CCC", City = "Eindhoven", Streetname = "Street 12" },
                new Company { Name = "EEE", City = "Eindhoven", Streetname = "Street 12" }
            };

            companies.ForEach(s => context.Companies.Add(s));
            context.SaveChanges();
            base.Seed(context);
        }
    }

    [Table("Company")]
    public class Company
    {
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public long ID { get; set; }
        public string Name { get; set; }
        public string City { get; set; }
        public string Streetname { get; set; }
    }
}

Global.asax.cs＆gt;的Application_Start

Database.SetInitializer<BruceDBContext>(new BruceInitializer());

连接字符串

<add name="defaultConnectionString" connectionString="Server=tcp:brucesqlserver.database.windows.net,1433;Initial Catalog=brucetest4;Persist Security Info=False;User ID=brucechen;Password=******;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=300;" providerName="System.Data.SqlClient"/>

<强>结果

azure首先创建数据库EF代码

1 个答案: