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[英]An exception of type 'System.Data.SqlClient.SqlException' occurred in EntityFramework.dll but was not handled in user code
[英]ASP.NET WebAPI error: an exception of type 'System.Data.SqlClient.SqlException' occurred in EntityFramework.dll but was not handled in user code
EntityFramework.dll中发生类型'System.Data.SqlClient.SqlException'的异常,但未在用户代码中处理
附加信息:建立与SQL Server的连接时发生与网络相关或特定于实例的错误。 服务器未找到或无法访问。 验证实例名称正确,并且已将SQL Server配置为允许远程连接。 (提供者:SQL网络接口,错误:25-连接字符串无效)
每当我调用控制器中编写的任何函数时,都会收到此错误。
控制器(Web API 2控制器为空):
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using Test.DBA;
using Test.Models;
namespace Test.Controllers
{
public class UserAPIController : ApiController
{
ApiDbContext dbContext = null;
public UserAPIController()
{
dbContext = new ApiDbContext();
}
[HttpPost]
public IHttpActionResult InsertUser(User user)
{
dbContext.Users.Add(user);
dbContext.SaveChangesAsync();
return Ok(user.Id);
}
public IEnumerable<User> GetAllUser()
{
var list = dbContext.Users.ToList();
return list;
}
[HttpPost]
public IHttpActionResult DeleteUser(User user)
{
dbContext.Users.Remove(user);
dbContext.SaveChangesAsync();
return Ok(user.Id);
}
[HttpGet]
public IHttpActionResult ViewUser(int id)
{
var student = dbContext.Users.Find(id);
return Ok(student);
}
[HttpGet]
public IHttpActionResult UpdateUser(User user)
{
var std = dbContext.Users.Find(user.Id);
std.Name = user.Name;
//std.startTime = user.startTime;
//std.endTime = user.endTime;
//std.Gender = user.Gender;
//std.Adress = user.Adress;
dbContext.Entry(std).State = System.Data.Entity.EntityState.Modified;
dbContext.SaveChangesAsync();
return Ok();
}
}
}
模型类:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace Test.Models
{
public class User
{
public int Id { get; set; }
public string Name { get; set; }
//public DateTime startTime { get; set; }
//public DateTime endTime { get; set; }
//public string Gender { get; set; }
//public string Adress { get; set; }
}
}
编辑:添加了连接字符串代码
<connectionStrings>
<add name ="Connection"
connectionString="Data Source=\.SQLEXPRESS;Initial Catalog=PonesiLoptu;Integrated Security=True"
providerName="System.Data.SqlClient"/>
</connectionStrings>*
编辑2:添加了ApiDbContext代码。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;
using Test.Models;
namespace Test.DBA
{
public class ApiDbContext :DbContext
{
public ApiDbContext() : base("Connection")
{
}
public DbSet<User> Users { get; set; }
}
}
看来您无法连接到SQL Server。 您是否以这种方式检查了连接字符串?
您输入的连接字符串错误!! 您写的数据源= /.SQLEXPRESS ,实际上是数据源= ./SQLEXPRESS ,整个连接字符串应如下所示:
<connectionStrings>
<add name ="Connection" connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=PonesiLoptu;Integrated Security=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
有一个小的类型,主机名( .
应该是之前在这种情况下) \\
分隔符,更改:
<connectionStrings>
<add name ="Connection" connectionString="Data Source=\.SQLEXPRESS;Initial Catalog=PonesiLoptu;Integrated Security=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
至:
<connectionStrings>
<add name ="Connection" connectionString="Data Source=localhost\SQLEXPRESS;Initial Catalog=PonesiLoptu;Integrated Security=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
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