Question

使用sql server 2008创建一个表并使用linq to sql。我用的是asp.net mvc3 剃刀观点。

尝试创建新记录时遇到以下异常

违反PRIMARY KEY约束＆＃39; PK_Department＆＃39;。无法在对象＆＃39; dbo.Department＆＃39;。

中插入重复的密钥

我试图将记录插入到一个表中，该表已将其id列作为另一个表中的外键。我无法理解这是什么错误。有人能帮助我吗？

部门控制器中的代码

// GET: /Department/Create

    public ActionResult Create()
    {
        Department department = new Department();
        return View(department);
    } 

    //
    // POST: /Department/Create

    [HttpPost]
    public ActionResult Create(FormCollection collection)
    {
        Department department = new Department();
        try
        {
            // TODO: Add insert logic here
            UpdateModel(department);//Updates all the fields in the table
            departmentRepository.Add(department);//Inserts the record
            departmentRepository.Save();//Saves all the fields in the record
            return RedirectToAction("Index");
        }
        catch(Exception ex)
        {
            var Ex_mesg = ex.Message;
            return View("Error");
        }
    }

部门存储库中的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace VisitorManagementSystem.Models
{
    public class DepartmentRepository
    {  
        private VisitorManagementDataContext db = new VisitorManagementDataContext();

        //QUERYABLE METHODS
        public IQueryable<Department> FindAllDepartment()
        {
            return db.Departments;//returns all the departments in the table
        }

        //ADD, SAVE, DELETE Methods
        public void Add(Department department)
        {
            db.Departments.InsertOnSubmit(department);//Adds a record to the table
        }

        public void Save()
        {
            db.SubmitChanges();//Saves the record to the table
        }

        public void Delete(Department department)
        {
            db.Departments.DeleteOnSubmit(department);//Deletes the record on submit.
        }


    }
}

剃须刀视图中的代码

@model VisitorManagementSystem.Models.Department

@{
    ViewBag.Title = "Create";
}

<h2>Create</h2>

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript">              </script>
    <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")"type="text/javascript">                                                   
</script>

@using (Html.BeginForm()) {
    @Html.ValidationSummary(true)
    <fieldset>
    <legend>Department</legend>

    <div class="editor-label">
        @Html.LabelFor(model => model.Name)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Name)
        @Html.ValidationMessageFor(model => model.Name)
    </div>

    <p>
        <input type="submit" value="Create" />
    </p>
  </fieldset>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

Answer 1

听起来您正在尝试将记录插入到与其他现有记录具有相同密钥的Department表中。在不了解您的架构，现有数据或代码的情况下，我不认为我能提供更好的解释。

在表中创建记录时出错

1 个答案: