第一步:在connectionstring中加入applicationName <connectionStrings><addname="SchoolDB2Entities"connectionString="data source=.;initial catalog=SchoolDB2;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework"providerName="System.Data.SqlClient"/></connectionStrings> 第二步:在SqlProfile中筛...
第一步:在connectionstring中加入applicationName <connectionStrings> <add name="SchoolDB2Entities" connectionString="data source=.;initial catalog=SchoolDB2;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" /> </connectionStrings> 1. 2. 3. 第...
<add key="ConnectionString" value="server=127.0.0.1;database=test;uid=root;pwd=sa123456;charset=utf8;" /> <entityFramework> <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework"> <parameters> <parameter value="mysqllocaldb" /> </parameters...
options.UseSqlServer( connectionString, x => x.UseHierarchyId()); 备注 多年来已通过 EntityFrameworkCore.SqlServer.HierarchyId 包提供对 EF Core 中 hierarchyid 的非官方支持。 此包作为社区与 EF 团队之间的协作受到维护。 现在有了对 .NET 中 hierarchyid 的官方支持,此社区包中的代码在原始参与者的许可...
一、Sql Server 1.添加实体类 public class UserInfo { public int Id { get; set; } [Required] [Display(Name = "名:")] public string FirstName { get; set; } [Required] [Display(Name = "姓:")] public string LastName { get; set; } [Display(Name = "出生日期:")] public DateTime...
SQL Server "ConnectionStrings":{"SqlServerConnection":"Server=myServer;Database=myDatabase;User Id=myUsername;Password=myPassword;"} 1. 2. 3. MySQL "ConnectionStrings":{"MySqlConnection":"Server=myServer;Database=myDatabase;User=myUsername;Password=myPassword;"} ...
生成器将转义反斜杠并为 Sql Server 连接构建正确的连接字符串。var builder = new SqlConnectionStringBuilder { DataSource = @"IP_ADDRESS\INSTANCE", InitialCatalog = "DbName", UserID = "MyUserId", Password = "MyPassword" };var connectionString = builder.ConnectionString;/...
上面并不是一个能正常执行的代码,抛出异常MySql.Data.MySqlClient.MySqlException (0x80004005): There is already an open DataReader associated with this Connection which must be closed first。 Github的issues提到这个问题,拆分查询需要开启Sql Server的MARS(MultipleActiveResultSets=true)。但是MySql不持支MARS,...
Microsoft.Data.SqlClient 是今后用于 SQL Server 的旗舰版数据访问驱动程序。而 System.Data.SqlClient 不再是开发的重点。一些重要功能(例如 Always Encrypted)仅可在 Microsoft.Data.SqlClient 上使用。缓解措施如果你的代码直接依赖于 System.Data.SqlClient,则必须将其更改为 Microsoft.Data.SqlClient;由于这两个...
"Forum":"server=.SQLEXPRESS;uid=sa;pwd=123456;database=Forum;" } 1.5、在 Startup.cs 中配置连接字符串,注入上下文对象 publicvoidConfigureServices(IServiceCollection services) { services.AddDbContext<ForumContext>(options => { varconnectionString =this.Configuration["ConnectionStrings:Forum"]; ...