尝试在 Dapper 中执行插入和更新 SQL 存储过程，出现转换类型错误 [关闭]

Question

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53 分钟前关闭。

改进这个问题

我正在尝试使用 Dapper 在 .NET 中构建我的 Web API。 虽然选择已成功，但插入和更新尚未成功。 基本上，它向我发送了一个错误，它无法将一种字符串类型转换为 integer，我不确定它为什么会给我这个错误。

SQL 插入存储过程：

ALTER proc [dbo].[MotionPictures_Insert] 
    @Name nvarchar(50)
    , @Description nvarchar(500)
    , @ReleaseYear int
    , @Id int OUTPUT
as 
BEGIN 
    INSERT INTO [dbo].[MotionPictures]
                ([Name]
                ,[Description]
                ,[ReleaseYear])
        VALUES 
               (@Name
               ,@Description
               ,@ReleaseYear)

    SET @Id = SCOPE_IDENTITY()
END 

电影资料库片段

public async Task<MotionPicture> CreateMotionPicture(MotionPictureAddRequest movie)
{
    var procedureName = "MotionPictures_Insert";
    var parameters = new DynamicParameters();
    parameters.Add("Name", movie.Name, DbType.String);
    parameters.Add("Description", movie.Description, DbType.String);
    parameters.Add("Release Year", movie.ReleaseYear, DbType.Int32);
    using (var connection = _context.CreateConnection())
    {
        var id = await connection.QuerySingleAsync<int>(procedureName, parameters, commandType: CommandType.StoredProcedure);
        var createdMovie = new MotionPicture
        {
            Id = id,
            Name = movie.Name,
            Description = movie.Description,
            ReleaseYear = movie.ReleaseYear
        };
        return createdMovie;
    }
}

Model 和请求片段

public class MotionPicture
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
    public int ReleaseYear { get; set; }
}

public class MotionPictureAddRequest
{
    [Required]
    [StringLength(50, ErrorMessage = "Name cannot be longer than 50 characters.")]
    public string Name { get; set; }

    [StringLength(500, ErrorMessage = "Description cannot be longer than 500 characters.")]
    public string? Description { get; set; }

    [Required]
    [StringLength(4, MinimumLength = 4, ErrorMessage = "Release year must be 4 digits only.")]
    public int ReleaseYear { get; set; }
}

Controller 片段

[HttpPost]
public async Task<IActionResult> CreateMotionPicture(MotionPictureAddRequest movie)
{
    try
    {
        var createdMovie = await _movieService.CreateMotionPicture(movie);
        return CreatedAtRoute("MotionPictureById", new { id = createdMovie.Id }, createdMovie);
    }
    catch (Exception ex)
    {
        //log error
        return StatusCode(500, ex.Message);
    }
}