Question

问题

我收到错误

过程或函数spAddDepartment指定了太多参数

如何解决？

详细信息：在ASP.NET MVC 5中使用流畅的api使用存储过程department将数据插入表spAddDepartment时，我得到了上面提到的错误。

表Departments：

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

Department模特课：

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")));
}

DepartmentController：

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

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

    return View(depart);
}

部门观点：

<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

执行SaveChanges()时，它会调用数据库（假设DepartmentName为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正在寻找带有2个参数的存储过程。

你问为什么2个参数？因为您的类有4个属性：一个是虚拟的，因此忽略一个，DepartmentID是标识列，因此一个将自动生成，因此不需要，另外两个属性（DepartmentName和{{ 1}}）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。

<强>修正

要解决此问题，请在存储过程中添加另一个参数。

过程或函数SpAddDepartment指定了太多参数

1 个答案: