问题描述
我有一个Azure数据库,并正在设置实体框架。我认为连接字符串是正确的...
< configSections>
<节名称=的EntityFrameworkTYPE =System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection,的EntityFramework,版本6.0.0.0 =文化=中性公钥= b77a5c561934e089requirePermission =FALSE/>
< / configSections>
<&是connectionStrings GT;
<添加名称=MyContext connectionString=\"Server=tcp:azure_server_name.database.windows.net,1433;Database=azure_database_name;User ID=azure_user_account@azure_server_name;Password=azure_password;Trusted_Connection=False;Encrypt=True;Connection超时= 30
的providerName =System.Data.SqlClient的/>
< /&是connectionStrings GT;
...但我不断收到以下超时错误。
消息:发生了错误。
ExceptionMessage:在'ObjectContent`1类型没有序列化响应正文内容类型应用/ JSON的;字符集= utf-8'。
ExceptionType:System.InvalidOperationException,
堆栈跟踪:空,
的InnerException:{
消息:发生了错误。
ExceptionMessage:超时超时时间在操作完成或服务器没有响应之前已过。
ExceptionType:System.Data.SqlClient.SqlException,
堆栈跟踪:
在System.Data.SqlClient.SqlConnection.OnError(SqlException异常,布尔breakConnection,Action`1 wrapCloseInAction)\\ r \\ n
在System.Data.SqlClient.SqlInternalConnection.OnError(SqlException异常,布尔breakConnection,Action`1 wrapCloseInAction)\\ r \\ n
在System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj,布尔callerHasConnectionLock,布尔asyncClose)\\ r \\ n
在System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior,的SqlCommand cmdHandler,SqlDataReader的数据流,BulkCopySimpleResultSet bulkCopyHandler,TdsParserStateObject stateObj,布尔和放大器; dataReady)\\ r \\ n
在System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(字符串methodName中,布尔异步,的Int32超时,布尔asyncWrite)\\ r \\ n
在System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1完成,字符串methodName中,布尔sendToPipe,超时的Int32,布尔asyncWrite)\\ r \\ n在System.Data.SqlClient.SqlCommand.ExecuteNonQuery(个)\\ r \\ n
在System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher< NonQuery> b__0(DbCommand和T,DbCommandInterceptionContext`1 C)\\ r \\ n
在System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget目标,Func`3操作,TInterceptionContext interceptionContext,Action`3执行,执行Action`3)\\ r \\ n
在System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.NonQuery(的DbCommand命令,DbCommandInterceptionContext interceptionContext)\\ r \\ n
在System.Data.Entity.SqlServer.SqlProviderServices.<>c__DisplayClass1a.<CreateDatabaseFromScript>b__19(DbConnection康恩)\\ r \\ n
在System.Data.Entity.SqlServer.SqlProviderServices.<>c__DisplayClass33.<UsingConnection>b__32()\\r\ 在System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.<>c__DisplayClass1.<Execute>b__0()\\r\ 在System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute [TResult](Func`1操作)\\ r \\ n
在System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(动作操作)\\ r \\ n
在System.Data.Entity.SqlServer.SqlProviderServices.UsingConnection(SqlConnection的的DbConnection,Action`1行为)\\ r \\ n
在System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection(SqlConnection的的DbConnection,Action`1行为)\\ r \\ n
在System.Data.Entity.SqlServer.SqlProviderServices.CreateDatabaseFromScript(Nullable`1的CommandTimeout,SqlConnection的的DbConnection,字符串createDatabaseScript)\\ r \\ n
在System.Data.Entity.SqlServer.SqlProviderServices.DbCreateDatabase(连接的DbConnection,Nullable`1的CommandTimeout,StoreItemCollection storeItemCollection)\\ r \\ n
在System.Data.Entity.Core.Common.DbProviderServices.CreateDatabase(连接的DbConnection,Nullable`1的CommandTimeout,StoreItemCollection storeItemCollection)\\ r \\ n
在System.Data.Entity.Core.Objects.ObjectContext.CreateDatabase(个)\\ r \\ n
在System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(连接的DbConnection)\\ r \\ n
在System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(动作mustSucceedToKeepDatabase)\\ r \\ n
在System.Data.Entity.Migrations.DbMigrator.Update(字符串targetMigration)\\ r \\ n
在System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext,Func`3 createMigrator,ObjectContext的ObjectContext的)\\ r \\ n
在System.Data.Entity.Internal.InternalContext.CreateDatabase(ObjectContext的ObjectContext的,DatabaseExistenceState existenceState)\\ r \\ n
在System.Data.Entity.Database.Create(DatabaseExistenceState existenceState)\\ r \\ n
在System.Data.Entity.DropCreateDatabaseAlways`1.InitializeDatabase(TContext上下文)\\ r \\ n
在System.Data.Entity.Internal.InternalContext.<>c__DisplayClassf`1.<CreateInitializationAction>b__e()\\r\ 在System.Data.Entity.Internal.InternalContext.PerformInitializationAction(动作动作)\\ r \\ n
在System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization(个)\\ r \\ n
在System.Data.Entity.Internal.LazyInternalContext&LT; InitializeDatabase&GT; b__4(InternalContext C)\\ r \\ n
在System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput输入)\\ r \\ n
在System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1动作)\\ r \\ n
在System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase(个)\\ r \\ n
在System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(类型的EntityType)\\ r \\ n
在System.Data.Entity.Internal.Linq.InternalSet`1.Initialize(个)\\ r \\ n
在System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator(个)\\ r \\ n
在System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.IEnumerable.GetEnumerator(个)\\ r \\ n
在Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter作家,IEnumerable的值,JsonArrayContract合同,JsonProperty成员,JsonContainerContract collectionContract,JsonProperty containerProperty)\\ r \\ n
在Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter作家,对象的值,JsonContract valueContract,JsonProperty成员,JsonContainerContract containerContract,JsonProperty containerProperty)\\ r \\ n
在Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter,对象的值,类型的objectType)\\ r \\ n
在Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter,对象的值,类型的objectType)\\ r \\ n
在System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(类型类型,对象的值,流writeStream,编码effectiveEncoding)\\ r \\ n
在System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(类型类型,对象的值,流writeStream,编码effectiveEncoding)\\ r \\ n
在System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(类型类型,对象的值,流writeStream,HttpContent内容)\\ r \\ n
在System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(类型类型,对象的值,流writeStream,HttpContent内容,TransportContext transportContext,的CancellationToken的CancellationToken)\\ r \\ n ---从previous位置堆栈跟踪结束的地方例外被抛出--- \\ r \\ n
在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务任务)\\ r \\ n
在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务任务)\\ r \\ n
在System.Web.Http.WebHost.HttpControllerHandler.<WriteBufferedResponseContentAsync>d__1b.MoveNext()\",
的InnerException:{
消息:发生了错误。
ExceptionMessage:等待操作超时
ExceptionType:System.ComponentModel.Win32Exception,
堆栈跟踪:空
}}}**超时过期。之前,完成上述操作超时时间已过或服务器没有响应。**
我有在Azure防火墙打开我的IP地址......而且我通过调试运行此。
下面的C语言应该执行$ C $的点点......
公共类MyContextInitializer:DropCreateDatabaseAlways&LT; MyContext&GT;
{
保护覆盖无效的种子(MyContext上下文)
{
context.Database.CommandTimeout = 0; VAR书=新的List&LT;图书&GT;
{
新图书(){名称=战争与皮斯,作者=托尔斯泰,价格=19.95米},
新图书(){名称=我弥留之际,作者=福克纳,价格=99.95米},
新图书(){名称=哈利波特1,作者=J.K.罗琳,价格=19.95米},
新图书(){名称=临运8,作者=自由,价格=49.95米},
新图书(){名称=书一,作者=作者1,价格=10.95米},
新图书(){名称=第二册,作者=Author2,价格=20.95米},
新图书(){名称=尚书三,作者=Author3,价格=30.95米}
};
books.ForEach(二= GT; context.Books.Add(B));
context.SaveChanges();
base.Seed(上下文);
}
}
-----------------根据要求添加本书的结构和MyContext -------------------
公共类图书
{
公众诠释标识{搞定;组; }
公共字符串名称{;组; }
公共字符串作者{搞定;组; }
公共十进制价格{搞定;组; }}
公共类MyContext:的DbContext
{
公共MyContext():基地(NAME = MyContext)
{ } 公共DbSet&LT;图书&GT;图书{搞定;组; }}
简答
大约需要120秒SQL Azure中创建一个数据库。这就是为什么你超时。因此,增加的CommandTimeout
。一种方法是code一行放到你的的DbContext
构造。
公共MyContext():基地(NAME = MyContext)
{
//3分钟命令超时
this.Database.CommandTimeout = 180;
}
故障排除步骤
我刚刚重新使用一个全新的SQL Azure的服务器在美国西部例外。当我打开Entity Framework的日志记录,输出显示,创建数据库
语句导致超时。这里是日志输出。
在2015年9月8日上午09时24分14秒-07打开的连接:00
SELECT CAST(SERVERPROPERTY('EngineEdition')为int)
- 执行在2015年9月8日上午9时24分14秒-07:00
- 完成40毫秒的结果:SqlDataReader的在2015年9月8日上午9点24分14秒-07关闭的连接:00
在2015年9月8日上午9时24分15秒-07打开的连接:00
IF DB_ID(N'mvp1')IS NOT NULL SELECT 1 ELSE SELECT COUNT(*)FROM sys.databases中WHERE [名] = N'mvp1
- 执行在2015年9月8日上午09时24分十五秒-07:00
- 完成306毫秒的结果:1在2015年9月8日上午9时24分15秒-07关闭的连接:00
在2015年9月8日上午9时24分15秒-07打开的连接:00
DROP DATABASE [mvp1]
- 执行在2015年9月8日上午09时24分十五秒-07:00
- 完成在10635毫秒,结果是:-1在2015年9月8日上午09时24分26秒-07关闭的连接:00
在2015年9月8日上午09时24分26秒-07打开的连接:00
创建数据库[mvp1]
- 执行在2015年9月8日上午9时24分26秒-07:00
- 无法在30050毫秒错误:超时过期。完成操作或服务器之前已超时期间没有响应。在2015年9月8日上午09点24分56秒-07关闭的连接:00
要进一步解决,我连接到SQL Azure数据库与SQL Server Management Studio并运行日志输出。该命令成功,但花的 1:53 以完成(只是两分钟)。这超出了默认的的DbContext
命令超时。
解决方法:增加的DbContext
命令超时超过这一期限。答对了。它的工作。
工作控制台应用程序上的我的电脑
packages.config
唯一的包是的EntityFramework
6.1.3版本。
&LT;?XML版本=1.0编码=UTF-8&GT?;
&LT;套餐及GT;
&LT;包ID =的EntityFramework版本=6.1.3targetFramework =net452/&GT;
&LT; /包&GT;
的App.config
此配置使用了拦截
部分记录生成的T-SQL。这使我能够运行在SQL Server Management Studio中记录的T-SQL来确定需要多长时间来创建数据库。
&LT;?XML版本=1.0编码=UTF-8&GT?;
&LT;结构&gt;
&LT; configSections&GT;
&lt;节名称=的EntityFrameworkTYPE =System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection,的EntityFramework,版本6.0.0.0 =文化=中性公钥= b77a5c561934e089requirePermission =FALSE/&GT;
&LT; / configSections&GT;
&LT;&启动GT;
&LT; supportedRuntime版本=V4.0SKU =.net框架,版本= v4.5.2/&GT;
&LT; /启动&GT;
&LT;&是connectionStrings GT;
&LT;添加名称=MyContext
的connectionString =服务器= TCP:d01kzjctcf.database.windows.net,1433;数据库= mvp1;用户ID = MVP @ d01kzjctcf;密码= 3PN * iV55XmtW; Trusted_Connection = FALSE;加密= TRUE;连接超时= 120;
的providerName =System.Data.SqlClient的/&GT;
&LT; /&是connectionStrings GT;
&LT;&的EntityFramework GT;
&LT; defaultConnectionFactory TYPE =System.Data.Entity.Infrastructure.SqlConnectionFactory,的EntityFramework/&GT;
&LT;供应商&GT;
&LT;供应商invariantName =System.Data.SqlClient的TYPE =System.Data.Entity.SqlServer.SqlProviderServices,EntityFramework.SqlServer/&GT;
&LT; /供应商&GT;
&LT;&拦截器GT;
&LT;拦截TYPE =System.Data.Entity.Infrastructure.Interception.DatabaseLogger,的EntityFramework&GT;
&LT;&参数GT;
&LT;参数值=C:\\ TEMP \\ LogOutput.txt/&GT;
&LT; /参数&GT;
&LT; /拦截&GT;
&LT; /拦截&GT;
&LT; /&的EntityFramework GT;
&LT; /结构&gt;
Program.cs的
演示简单地下降,创建数据库,书籍种子它,选择所有的书,和书的数量输出到控制台上。
使用系统;
使用System.Data.Entity的;
使用System.Collections.Generic;
使用System.Data.Entity.SqlServer;公共类节目
{
公共静态无效的主要()
{
Database.SetInitializer&所述; MyContext&GT;(新MyContextInitializer());
变种数= 0;
使用(VAR上下文=新MyContext())
{
数= context.Books.CountAsync()结果。
}
Console.WriteLine(的String.Format(有{0}的书。,计数));
到Console.ReadLine();
}
}公共类MyContextInitializer:DropCreateDatabaseAlways&LT; MyContext&GT;
{
保护覆盖无效的种子(MyContext上下文)
{
context.Database.CommandTimeout = 0; VAR书=新的List&LT;图书&GT;
{
新图书(){名称=战争与皮斯,作者=托尔斯泰,价格=19.95米},
新图书(){名称=我弥留之际,作者=福克纳,价格=99.95米},
新图书(){名称=哈利波特1,作者=J.K.罗琳,价格=19.95米},
新图书(){名称=临运8,作者=自由,价格=49.95米},
新图书(){名称=书一,作者=作者1,价格=10.95米},
新图书(){名称=第二册,作者=Author2,价格=20.95米},
新图书(){名称=尚书三,作者=Author3,价格=30.95米}
};
books.ForEach(二= GT; context.Books.Add(B));
context.SaveChanges();
base.Seed(上下文);
}
}公共类MyContext:的DbContext
{
公共MyContext():基地(NAME = MyContext)
{
this.Database.CommandTimeout = 180;
} 公共DbSet&LT;图书&GT;图书{搞定;组; }
}公共类图书
{
公众诠释标识{搞定;组; }
公共字符串名称{;组; }
公共字符串作者{搞定;组; }
公共十进制价格{搞定;组; }
}
另请参见
How我查看由实体框架生成的SQL?
关闭思考
一个全球三分钟的CommandTimeout
可能只适合于发展。在生产中,你可能会想,以减少这或将其设置只对某些特定的长期运行的命令,如数据库的创建。
I have an Azure database and am setting up Entity Framework. I think the connection string is correct...
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
</configSections>
<connectionStrings>
<add name="MyContext" connectionString="Server=tcp:azure_server_name.database.windows.net,1433;Database=azure_database_name;User ID=azure_user_account@azure_server_name;Password=azure_password;Trusted_Connection=False;Encrypt=True;Connection Timeout=30"
providerName="System.Data.SqlClient" />
</connectionStrings>
...but I keep getting the following timeout error.
"Message":"An error has occurred.",
"ExceptionMessage":"The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'.",
"ExceptionType":"System.InvalidOperationException",
"StackTrace":null,
"InnerException":{
"Message":"An error has occurred.",
"ExceptionMessage":"Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.",
"ExceptionType":"System.Data.SqlClient.SqlException",
"StackTrace":"
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)\r\n
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)\r\n
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)\r\n
at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)\r\n
at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)\r\n
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)\r\n at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()\r\n
at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.<NonQuery>b__0(DbCommand t, DbCommandInterceptionContext`1 c)\r\n
at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)\r\n
at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.NonQuery(DbCommand command, DbCommandInterceptionContext interceptionContext)\r\n
at System.Data.Entity.SqlServer.SqlProviderServices.<>c__DisplayClass1a.<CreateDatabaseFromScript>b__19(DbConnection conn)\r\n
at System.Data.Entity.SqlServer.SqlProviderServices.<>c__DisplayClass33.<UsingConnection>b__32()\r\n
at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.<>c__DisplayClass1.<Execute>b__0()\r\n
at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)\r\n
at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Action operation)\r\n
at System.Data.Entity.SqlServer.SqlProviderServices.UsingConnection(DbConnection sqlConnection, Action`1 act)\r\n
at System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection(DbConnection sqlConnection, Action`1 act)\r\n
at System.Data.Entity.SqlServer.SqlProviderServices.CreateDatabaseFromScript(Nullable`1 commandTimeout, DbConnection sqlConnection, String createDatabaseScript)\r\n
at System.Data.Entity.SqlServer.SqlProviderServices.DbCreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection)\r\n
at System.Data.Entity.Core.Common.DbProviderServices.CreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection)\r\n
at System.Data.Entity.Core.Objects.ObjectContext.CreateDatabase()\r\n
at System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(DbConnection connection)\r\n
at System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)\r\n
at System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration)\r\n
at System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func`3 createMigrator, ObjectContext objectContext)\r\n
at System.Data.Entity.Internal.InternalContext.CreateDatabase(ObjectContext objectContext, DatabaseExistenceState existenceState)\r\n
at System.Data.Entity.Database.Create(DatabaseExistenceState existenceState)\r\n
at System.Data.Entity.DropCreateDatabaseAlways`1.InitializeDatabase(TContext context)\r\n
at System.Data.Entity.Internal.InternalContext.<>c__DisplayClassf`1.<CreateInitializationAction>b__e()\r\n
at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action)\r\n
at System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization()\r\n
at System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c)\r\n
at System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input)\r\n
at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action)\r\n
at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase()\r\n
at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)\r\n
at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()\r\n
at System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator()\r\n
at System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.IEnumerable.GetEnumerator()\r\n
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)\r\n
at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)\r\n
at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n
at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n
at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, HttpContent content)\r\n
at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type, Object value, Stream writeStream, HttpContent content, TransportContext transportContext, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at System.Web.Http.WebHost.HttpControllerHandler.<WriteBufferedResponseContentAsync>d__1b.MoveNext()",
"InnerException":{
"Message":"An error has occurred.",
"ExceptionMessage":"The wait operation timed out",
"ExceptionType":"System.ComponentModel.Win32Exception",
"StackTrace":null
}}}
**Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.**
I do have the Azure Firewall open for my IP address...and I'm running this through the debugger.
Here's the little bit of code it should be executing...
public class MyContextInitializer : DropCreateDatabaseAlways<MyContext>
{
protected override void Seed(MyContext context)
{
context.Database.CommandTimeout = 0;
var books = new List<Book>
{
new Book() {Name = "War and Pease", Author = "Tolstoy",Price=19.95m },
new Book() {Name = "As I Lay Dying", Author = "Faulkner",Price=99.95m },
new Book() {Name = "Harry Potter 1", Author = "J.K. Rowling",Price=19.95m },
new Book() {Name = "Pro Win 8", Author = "Liberty",Price=49.95m },
new Book() {Name = "Book one", Author = "Author1",Price=10.95m },
new Book() {Name = "Book two", Author = "Author2",Price=20.95m },
new Book() {Name = "Book three", Author = "Author3",Price=30.95m }
};
books.ForEach(b => context.Books.Add(b));
context.SaveChanges();
base.Seed(context);
}
}
-----------------Adding book structure and MyContext upon request-------------------
public class Book
{
public int Id { get; set; }
public string Name { get; set; }
public string Author { get; set; }
public decimal Price { get; set; }
}
public class MyContext : DbContext
{
public MyContext() : base("name=MyContext")
{
}
public DbSet<Book> Books { get; set; }
}
Short Answer
It takes about 120 seconds for SQL Azure to create a database. That is why you are timing out. So, increase the CommandTimeout
. One way is to drop a single line of code into your DbContext
constructor.
public MyContext() : base("name=MyContext")
{
// three minute command timeout
this.Database.CommandTimeout = 180;
}
Troubleshooting Steps
I just recreated the exception using a brand new SQL Azure server in West US. When I turned on Entity Framework logging, the output showed that the Create database
statement caused the timeout. Here is the log output.
Opened connection at 9/8/2015 9:24:14 AM -07:00
select cast(serverproperty('EngineEdition') as int)
-- Executing at 9/8/2015 9:24:14 AM -07:00
-- Completed in 40 ms with result: SqlDataReader
Closed connection at 9/8/2015 9:24:14 AM -07:00
Opened connection at 9/8/2015 9:24:15 AM -07:00
IF db_id(N'mvp1') IS NOT NULL SELECT 1 ELSE SELECT Count(*) FROM sys.databases WHERE [name]=N'mvp1'
-- Executing at 9/8/2015 9:24:15 AM -07:00
-- Completed in 306 ms with result: 1
Closed connection at 9/8/2015 9:24:15 AM -07:00
Opened connection at 9/8/2015 9:24:15 AM -07:00
drop database [mvp1]
-- Executing at 9/8/2015 9:24:15 AM -07:00
-- Completed in 10635 ms with result: -1
Closed connection at 9/8/2015 9:24:26 AM -07:00
Opened connection at 9/8/2015 9:24:26 AM -07:00
create database [mvp1]
-- Executing at 9/8/2015 9:24:26 AM -07:00
-- Failed in 30050 ms with error: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Closed connection at 9/8/2015 9:24:56 AM -07:00
To troubleshoot further, I connected to the SQL Azure database with SQL Server Management Studio and ran the log output. The commands succeeded but took 1:53 to complete (just about two minutes). That exceeds the default DbContext
command timeout.
The fix: increase the DbContext
command timeout to exceed that duration. Bingo. It worked.
Working Console App on My Computer
packages.config
The only package is EntityFramework
version 6.1.3.
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="EntityFramework" version="6.1.3" targetFramework="net452" />
</packages>
App.config
This config uses the interceptors
section to log the generated T-SQL. That enabled me to run the logged T-SQL on SQL Server Management Studio to determine how long it takes to create the database.
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
<connectionStrings>
<add name="MyContext"
connectionString="Server=tcp:d01kzjctcf.database.windows.net,1433;Database=mvp1;User ID=mvp@d01kzjctcf;Password=3pN*iV55XmtW;Trusted_Connection=False;Encrypt=True;Connection Timeout=120;"
providerName="System.Data.SqlClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
<interceptors>
<interceptor type="System.Data.Entity.Infrastructure.Interception.DatabaseLogger, EntityFramework">
<parameters>
<parameter value="C:\Temp\LogOutput.txt"/>
</parameters>
</interceptor>
</interceptors>
</entityFramework>
</configuration>
Program.cs
The demo simply drops and creates the database, seeds it with books, selects all the books, and outputs the number of books to the console.
using System;
using System.Data.Entity;
using System.Collections.Generic;
using System.Data.Entity.SqlServer;
public class Program
{
public static void Main()
{
Database.SetInitializer<MyContext>(new MyContextInitializer());
var count = 0;
using (var context = new MyContext())
{
count = context.Books.CountAsync().Result;
}
Console.WriteLine(string.Format("There are {0} books.", count));
Console.ReadLine();
}
}
public class MyContextInitializer : DropCreateDatabaseAlways<MyContext>
{
protected override void Seed(MyContext context)
{
context.Database.CommandTimeout = 0;
var books = new List<Book>
{
new Book() {Name = "War and Pease", Author = "Tolstoy",Price=19.95m },
new Book() {Name = "As I Lay Dying", Author = "Faulkner",Price=99.95m },
new Book() {Name = "Harry Potter 1", Author = "J.K. Rowling",Price=19.95m },
new Book() {Name = "Pro Win 8", Author = "Liberty",Price=49.95m },
new Book() {Name = "Book one", Author = "Author1",Price=10.95m },
new Book() {Name = "Book two", Author = "Author2",Price=20.95m },
new Book() {Name = "Book three", Author = "Author3",Price=30.95m }
};
books.ForEach(b => context.Books.Add(b));
context.SaveChanges();
base.Seed(context);
}
}
public class MyContext : DbContext
{
public MyContext() : base("name=MyContext")
{
this.Database.CommandTimeout = 180;
}
public DbSet<Book> Books { get; set; }
}
public class Book
{
public int Id { get; set; }
public string Name { get; set; }
public string Author { get; set; }
public decimal Price { get; set; }
}
See Also
Set database timeout in Entity Framework
How do I view the SQL generated by the entity framework?
Closing Thoughts
A global CommandTimeout
of three minutes is probably appropriate only for development. In production, you will probably want to decrease that or to set it only for certain specific long-running commands such as database creation.
这篇关于设置超时时,实体框架连接到Azure的的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!