C# 将记录添加到MySQL始终引发-"；输入字符串格式不正确错误"；

每次我尝试将记录添加到DB中时，事务都会失败，并出现“输入字符串格式不正确错误”，即使我尝试过不使用任何字符串

让您更深入地了解我要做的事情，基本上我的应用程序的用户在启动时请求他的会话id，这会跟踪他的活动，在下面的阶段中，服务器收到请求并从MySQL获取会话id，然后它将其传递回客户机，客户机使用此号码对其自己的通道进行身份验证

我从下面的日志中看到的似乎是引发此异常的一些无效转换

我正在使用：

.NET核心2.1

Pomelo.EntityFrameworkCore.MySql 3.1.0

为linux gnu x86_x64编译的Oracle MySQL 5.1.73（没有机会更新）

我希望有人能帮忙

下面是麻烦代码以及实体、表设计和错误日志的定义：

    public static uint CreateSession(UsageTracking usageTracking)
    {
        using (MySQL SQL = new MySQL())
        {
            SQL.UsageTracking.Add(usageTracking);
            SQL.SaveChanges();

            return usageTracking.SessionID;
        }
    }

   public class UsageTracking
    {
        [Key]
        public uint SessionID { get; set; }
        [MaxLength(7)] [Required]
        public string USID{ get; set; }
        [Required]
        public long Date { get; set; }
    }


class MySQL : DbContext
{
    public static string connectionHost;
    public static string connectionPort;
    public static string connectionDB;
    public static string connectionUsn;
    public static string connectionPsw;

    public DbSet<DB.UsageTracking> UsageTracking { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder options)
    {
        options
            .UseMySql($"server={connectionHost};port={connectionPort};database={connectionDB};user= 
                 {connectionUsn};password={connectionPsw}", mySQLOptions => mySQLOptions
                .ServerVersion(new Version(5,1,73), ServerType.MySql)
            );
    }
}

错误日志：

        <logevent time="2020-01-15 16:24:17.2857" level="ERROR">
          <message>Input string was not in a correct format.</message>
          <type>System.FormatException</type>
          <trace>   at System.Number.StringToNumber(ReadOnlySpan`1 str, NumberStyles options, NumberBuffer&amp; number, NumberFormatInfo info, Boolean parseDecimal)
           at System.Number.ParseUInt32(ReadOnlySpan`1 value, NumberStyles options, NumberFormatInfo numfmt)
           at System.String.System.IConvertible.ToUInt32(IFormatProvider provider)
           at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
           at MySql.Data.MySqlClient.MySqlConnectionStringValueOption`1.ChangeType(Object objectValue) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnectionStringBuilder.cs:line 703
           at MySql.Data.MySqlClient.MySqlConnectionStringValueOption`1.GetValue(MySqlConnectionStringBuilder builder) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnectionStringBuilder.cs:line 674
           at MySqlConnector.Core.ConnectionSettings..ctor(MySqlConnectionStringBuilder csb) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionSettings.cs:line 39
           at MySqlConnector.Core.ConnectionPool.GetPool(String connectionString) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionPool.cs:line 405
           at MySql.Data.MySqlClient.MySqlConnection.OpenAsync(Nullable`1 ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 292
           at MySql.Data.MySqlClient.MySqlConnection.Open() in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 280
           at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenDbConnection(Boolean errorsExpected)
           at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open(Boolean errorsExpected)
           at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlRelationalConnection.Open(Boolean errorsExpected)
           at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction(IsolationLevel isolationLevel)
           at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction()
           at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.Execute(IEnumerable`1 commandBatches, IRelationalConnection connection)
           at Microsoft.EntityFrameworkCore.Storage.RelationalDatabase.SaveChanges(IList`1 entries)
           at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(IList`1 entriesToSave)
           at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(DbContext _, Boolean acceptAllChangesOnSuccess)
           at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
           at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(Boolean acceptAllChangesOnSuccess)
           at Microsoft.EntityFrameworkCore.DbContext.SaveChanges(Boolean acceptAllChangesOnSuccess)
           at Microsoft.EntityFrameworkCore.DbContext.SaveChanges()
           at ReportingServer.DB.CreateSession(UsageTracking usageTracking) in C:\Users\User\source\repos\Reporting Server\MySQL.cs:line 20
           at ReportingServer.APIs.GetSessionID() in C:\Users\User\source\repos\Reporting Server\APIs.cs:line 66
           at ReportingServer.APIs.Process() in C:\Users\User\source\repos\Reporting Server\APIs.cs:line 41
           at ReportingServer.HTTPServer.&lt;Listen&gt;b__10_0(Object HTTPRequest) in C:\Users\User\source\repos\Reporting Server\HTTPServer.cs:line 135</trace>
          <source>System.Private.CoreLib</source>
          <location>
          <ReportedIn>ReportingServer.Log</ReportedIn>
          <OnLine>17</OnLine>
        </location>
        </logevent>

输入字符串的格式不正确。
System.FormatException
位于System.Number.StringToNumber（只读span`1 str、NumberStyles选项、NumberBuffer&；Number、NumberFormatInfo信息、布尔解析十进制）
在System.Number.ParseUInt32（只读span`1值、NumberStyles选项、NumberFormatInfo numfmt）
位于System.String.System.IConvertible.ToUInt32（IFormatProvider）
位于System.Convert.ChangeType（对象值、类型conversionType、IFormatProvider）
在C:\projects\mysqlconnector\src\mysqlconnector\MySql.Data.MySqlClient\MySqlConnectionStringBuilder.cs中的MySql.Data.MySqlConnectionStringValueOption`1.ChangeType（objectobjectobjectvalue）处：第703行
在C:\projects\mysqlconnector\src\mysqlconnector\MySql.Data.MySqlClient\MySqlConnectionStringBuilder.cs中的MySql.Data.mysqlconnectionstringvalue选项`1.GetValue（MySqlConnectionStringBuilder生成器）：第674行
在C:\projects\MySqlConnector\src\MySqlConnector\Core\ConnectionSettings.cs中的MySqlConnector.Core.ConnectionSettings..ctor（MySqlConnectionStringBuilder csb）处：第39行
在C:\projects\MySqlConnector\src\MySqlConnector\Core\ConnectionPool.cs中的MySqlConnector.Core.ConnectionPool.GetPool（字符串connectionString）处：第405行
在C:\projects\mysqlconnector\src\mysqlconnector\MySql.Data.MySqlClient\MySqlConnection.OpenAsync中的MySql.Data.MySqlConnection.OpenAsync（Nullable`1 ioBehavior，CancellationToken CancellationToken）中：第292行
在C:\projects\mysqlconnector\src\mysqlconnector\MySql.Data.MySqlClient\MySqlConnection.cs中的MySql.Data.MySqlClient.MySqlConnection.Open（）处：第280行
位于Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenDbConnection（布尔错误预期）
位于Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open（布尔错误预期）
位于Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlRelationalConnection.Open（布尔错误预期）
位于Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction（IsolationLevel IsolationLevel）
在Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction（）中
在Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.Execute（IEnumerable`1 commandBatches，IRelationalConnection）
位于Microsoft.EntityFrameworkCore.Storage.RelationalDatabase.SaveChanges（IList`1条目）
位于Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges（IList`1 entriesToSave）
在Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges（DbContext)，布尔接受ChangesOnSuccess）
在Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlExecutionStrategy.Execute[TState，TResult]（TState状态，Func`3操作，Func`3验证成功）
位于Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges（布尔接受更改成功）
在Microsoft.EntityFrameworkCore.DbContext.SaveChanges（布尔接受更改成功）
在Microsoft.EntityFrameworkCore.DbContext.SaveChanges（）中
在C:\Users\User\source\repos\Reporting Server\MySQL.cs中的ReportingServer.DB.CreateSession（UsageTracking-UsageTracking）中：第20行
在C:\Users\User\source\repos\Reporting Server\api.cs中的ReportingServer.api.GetSessionID（）处：第66行
在C:\Users\User\source\repos\Reporting Server\api.cs中的ReportingServer.api.Process（）处：第41行
在C:\Users\User\source\repos\Reporting Server\HTTPServer.cs中的ReportingServer.HTTPServer.Listenb\uuuuuu10\u0（对象HTTPRequest）中：第135行
System.Private.CoreLib
ReportingServer.Log
17

确保下面的代码工作正常。设置一个断点进行检查

$“服务器={connectionHost}；端口={connectionPort}；数据库={connectionDB}；用户=

---

{connectionUsn}；密码={connectionPsw}“

已解决。Oleksa的回答是正确的，我在配置后检查了连接，它是不正确的，配置部分被错误地更改了，我只是一直在看错误的代码部分

---

谢谢

堆栈跟踪显示，MySqlConnector无法将提供的连接字符串选项之一转换为

UInt32

是

port

参数，在您的例子中是

connectionPort

变量，它不是有效的

UInt32

。它必须是介于

1

和

65535

之间的有效端口号（MySQL的默认端口号为

3306

）

---

---

另一方面，Pomelo

3.1.0

没有正式发布MySQL

5.1.73

，因此将来可能会遇到不兼容问题。

似乎是在连接打开时发生的。请查查

        <logevent time="2020-01-15 16:24:17.2857" level="ERROR">
          <message>Input string was not in a correct format.</message>
          <type>System.FormatException</type>
          <trace>   at System.Number.StringToNumber(ReadOnlySpan`1 str, NumberStyles options, NumberBuffer&amp; number, NumberFormatInfo info, Boolean parseDecimal)
           at System.Number.ParseUInt32(ReadOnlySpan`1 value, NumberStyles options, NumberFormatInfo numfmt)
           at System.String.System.IConvertible.ToUInt32(IFormatProvider provider)
           at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
           at MySql.Data.MySqlClient.MySqlConnectionStringValueOption`1.ChangeType(Object objectValue) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnectionStringBuilder.cs:line 703
           at MySql.Data.MySqlClient.MySqlConnectionStringValueOption`1.GetValue(MySqlConnectionStringBuilder builder) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnectionStringBuilder.cs:line 674
           at MySqlConnector.Core.ConnectionSettings..ctor(MySqlConnectionStringBuilder csb) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionSettings.cs:line 39
           at MySqlConnector.Core.ConnectionPool.GetPool(String connectionString) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionPool.cs:line 405
           at MySql.Data.MySqlClient.MySqlConnection.OpenAsync(Nullable`1 ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 292
           at MySql.Data.MySqlClient.MySqlConnection.Open() in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 280
           at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenDbConnection(Boolean errorsExpected)
           at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open(Boolean errorsExpected)
           at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlRelationalConnection.Open(Boolean errorsExpected)
           at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction(IsolationLevel isolationLevel)
           at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction()
           at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.Execute(IEnumerable`1 commandBatches, IRelationalConnection connection)
           at Microsoft.EntityFrameworkCore.Storage.RelationalDatabase.SaveChanges(IList`1 entries)
           at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(IList`1 entriesToSave)
           at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(DbContext _, Boolean acceptAllChangesOnSuccess)
           at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
           at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(Boolean acceptAllChangesOnSuccess)
           at Microsoft.EntityFrameworkCore.DbContext.SaveChanges(Boolean acceptAllChangesOnSuccess)
           at Microsoft.EntityFrameworkCore.DbContext.SaveChanges()
           at ReportingServer.DB.CreateSession(UsageTracking usageTracking) in C:\Users\User\source\repos\Reporting Server\MySQL.cs:line 20
           at ReportingServer.APIs.GetSessionID() in C:\Users\User\source\repos\Reporting Server\APIs.cs:line 66
           at ReportingServer.APIs.Process() in C:\Users\User\source\repos\Reporting Server\APIs.cs:line 41
           at ReportingServer.HTTPServer.&lt;Listen&gt;b__10_0(Object HTTPRequest) in C:\Users\User\source\repos\Reporting Server\HTTPServer.cs:line 135</trace>
          <source>System.Private.CoreLib</source>
          <location>
          <ReportedIn>ReportingServer.Log</ReportedIn>
          <OnLine>17</OnLine>
        </location>
        </logevent>