System.Data.SqlClient.SqlException：列名称或提供的值的数量与表定义不匹配

Question

我希望用户输入显示的所有数据（数据库中的列），填写并提交。我无法使用

HTML.HiddenFor

元素自动生成 Id 和 CompanyID。

System.Data.SqlClient.SqlException：列名称或提供的值的数量与表定义不匹配..

型号：

namespace Project.Models
{
    public class Contact
    {
        public int Id { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Email { get; set; }
        public int Phone { get; set; }
        public int CompanyID { get; set; }
    }
}

查看：

@model Project.Contact

<h2>Create Contact</h2>

@using (Html.BeginForm("Create", "Home", FormMethod.Post))
{
    <table>
        <tr>
            <th>First name</th>
            <th>Last name</th>
            <th>Email</th>
            <th>Phone</th>
        </tr>
        <tr>
            <td>@Html.HiddenFor(m => m.Id)</td>
            <td></td>
            <td>@Html.TextBoxFor(m => m.FirstName)</td>
            <td>@Html.TextBoxFor(m => m.LastName)</td>
            <td>@Html.TextBoxFor(m => m.Email)</td>
            <td>@Html.TextBoxFor(m => m.Phone)</td>
            <td>@Html.HiddenFor(m => m.CompanyID)</td>
        </tr>

    </table>
    <br />
    <input type="submit" name="btn" class="btn-primary" value="Create" />
}

控制器：

using Arbetsprov_Sublime___Andre_Kordasti.Models;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Web.Mvc;

namespace Arbetsprov_Sublime___Andre_Kordasti.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            return View();
        }

        [HttpGet]
        public ActionResult Create()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Create(Contact model)
        {
            var connection = new SqlConnection(@"Data Source=.\SQLExpress;Initial Catalog=Sublime;Integrated Security=True");
            connection.Open();

            var command = new SqlCommand("INSERT INTO Contact Values('" + model.Id + "','" + model.FirstName + " " + model.LastName + "','" + model.Email + " " + model.Phone + "','" + model.CompanyID + "')", connection);
            command.ExecuteNonQuery();

            return View();
        }
    }
}

Answer 1

var command = new SqlCommand("INSERT INTO Contact(Id,FirstName,LastName,Email,Phone,CompanyId) Values('" + model.Id + "','" + model.FirstName + " " + model.LastName + "','" + model.Email + " " + model.Phone + "','" + model.CompanyID + "')", connection);
command.ExecuteNonQuery();

如果有一列必须自动生成，你必须告诉你为哪一列给出的值，以便sql知道未提及的属性应该是自动生成的

Answer 2

也许您的联系人表“ID”列值重复器。例如：当前 ID 已存在

var command = new SqlCommand("INSERT INTO Contact (Id, FirstName, LastName, Email , Phone, CompanyID) Values('" + model.Id + "','" + model.FirstName + " " + model.LastName + "','" + model.Email + " " + model.Phone + "','" + model.CompanyID + "')", connection);
command.ExecuteNonQuery();

或者（如果你的表id列是自动递增的）

var command = new SqlCommand("INSERT INTO Contact (FirstName, LastName, Email , Phone, CompanyID) Values('" + model.FirstName + " " + model.LastName + "','" + model.Email + " " + model.Phone + "','" + model.CompanyID + "')", connection);
command.ExecuteNonQuery();

Answer 3

尝试不向其发送 ID：

var command = new SqlCommand("INSERT INTO Contact(FirstName,LastName,Email,Phone,CompanyId) Values("'"+ model.FirstName + "',' " + model.LastName + "','" + model.Email + "',' " + model.Phone + "','" + model.CompanyID + "')", connection);
command.ExecuteNonQuery();

如果不起作用，请分享抛出的异常。

您在评论中分享的查询缺少一些逗号“,”。

那么

INSERT INTO tbl(Column1,Column2,Column3) values ('value1''value2'+','value3')

会给你同样的错误，因为你提到了 3 列，但只给出了 2 个值。