Question

我很难理解正确的Dapper语法，将包含TableValueParameter（TVP）的参数以及其他参数传递给存储过程。我的代码的简化版本：

类

public class GalleryViewModel
{
    public string GalleryName { get; set; }
    public string Category { get; set; }
    public IEnumerable<Image> Images { get; set; }
}

public class Image
{
    public string FileName { get; set; }
    public int Order { get; set; }
}

C＃Snippet

var param = new DynamicParameters();
param.Add("@Images", model.Images);//TVP
param.Add("@GalleryName", model.GalleryName);
param.Add("@Category", model.Category);

connection.Execute("CreateGallery", param, commandType: CommandType.StoredProcedure);

SQL代码段

--Create table type
CREATE TYPE GalleryImageType AS TABLE   
( 
    FileName    NVARCHAR(64),
    Order       INT
)
GO 

CREATE PROCEDURE [dbo].[CreateGallery]
    @Images             GalleryImageType READONLY,
    @GalleryName        NVARCHAR(32),
    @Category           NVARCHAR(32)
AS
-- SPROC contents here....

Answer 1

使用DataTable的实例而不是IEnumerable：

DataTable dt = new DataTable();
dt.Columns.Add("FileName");
dt.Columns.Add("Order");

foreach (var image in viewmodel.Images)
{
    dt.Rows.Add(image.FileName, image.Order);
}

var param = new DynamicParameters();
param.Add("@Images", dt);//TVP
param.Add("@GalleryName", model.GalleryName);
param.Add("@Category", model.Category);

connection.Execute("CreateGallery", param, commandType: CommandType.StoredProcedure);

包含TableValueParameter的Dapper存储过程

1 个答案: