c# - 过程或函数 SpAddDepartment 指定的参数过多

Question

问题

我收到错误

Procedure or function spAddDepartment has too many arguments specified

如何解决？

详细信息:在 ASP.NET MVC 5 中使用 Fluent api 使用存储过程 spAddDepartment 将数据插入表 department 时，出现上述错误。

表部门:

CREATE TABLE [dbo].[Departments]
(
    [DepartmentID] [int] IDENTITY(1,1) NOT NULL,
    [DepartmentName] [nvarchar](50) NULL,
    [IsActive] [bit] NULL
)

存储过程spAddDepartment:

ALTER Procedure [dbo].[spAddDepartment]
    @DepartmentName    nvarchar(50)
AS
BEGIN
    INSERT INTO Departments 
    VALUES (@DepartmentName, 1) 
END

部门模型类:

public partial class Department
{
    public Department()
    {
        Employees = new HashSet<Employee>();
    }

    public int DepartmentID { get; set; }

    [StringLength(50)]
    public string DepartmentName { get; set; }

    public bool? IsActive { get; set; }

    public virtual ICollection<Employee> Employees { get; set; }
}

数据库上下文:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Entity<Department>()
                .MapToStoredProcedures(p => p.Insert(sp => sp.HasName("spAddDepartment").Parameter(pm => pm.DepartmentName, "DepartmentName")));
}

部门 Controller :

[HttpPost]
public ActionResult Insert(Department depart)
{
    depart.IsActive = true;

    hr.Departments.Add(depart);
    hr.SaveChanges();

    return View(depart);
}

部门 View :

<div class="form-horizontal">
    <h4>Department</h4>
    <hr />
    @Html.ValidationSummary(true, "", new { @class = "text-danger" })
    <div class="form-group">
        @Html.LabelFor(model => model.DepartmentName, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.DepartmentName, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.DepartmentName, "", new { @class = "text-danger" })
        </div>
    </div>
    <div class="form-group">
        @Html.LabelFor(model => model.IsActive, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            <div class="checkbox">
                @Html.EditorFor(model => model.IsActive)
                @Html.ValidationMessageFor(model => model.IsActive, "", new { @class = "text-danger" })
            </div>
        </div>
    </div>
    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" value="Create" class="btn btn-default" />
        </div>
    </div>
</div>

Answer 1

当您执行SaveChanges()时，它将调用数据库(假设DepartmentName是Dep1:

exec [dbo].[spAddDepartment] @DepartmentName=N'Dep1',@IsActive=1

这就是您收到错误的原因，因为您的存储过程只有 1 个参数，但 EF 正在寻找具有 2 个参数的存储过程。

你问为什么有2个参数？因为您的类有 4 个属性:一个是虚拟属性，因此会被忽略，DepartmentID 是标识列，因此将自动生成一个属性，因此不需要，其他 2 个属性 (DepartmentName 和 IsActive) 是必需的，因此它需要一个带有 2 个参数的存储过程，如上所示。

修复

要解决此问题，请向存储过程添加另一个参数。