Dapper Contrib Output Parameter

March 2, 2022

I’m research about Dapper Contrib Storeprocedure and I donn’t know how to get value Output Parameter from the procedure, this is my store procedure:

ALTER PROC [dbo].[spCustomPaging]
    @SkipCount INT,
    @PageSize INT, /*record in 1 page*/
    @TotalRows INT OUTPUT /*tong record*/
AS
BEGIN
SET NOCOUNT ON;
    
    SELECT @TotalRows = COUNT(*)
    FROM dbo.Product

    SELECT *
    FROM dbo.Product
    ORDER BY ProductID OFFSET @SkipCount ROW FETCH NEXT @PageSize ROWS ONLY

And This is my Dapper Contrib query:

db.Query<Models.Product>("spCustomPaging", new { SkipCount = skip, PageSize = pageSize }, commandType: System.Data.CommandType.StoredProcedure);

How I can get the TotalRow from the store with Dapper Contrib?
Sorry for my bad English and Thank You.

>Solution :

You can try to use DynamicParameters be the parameter that can declare ParameterDirection.Output for the parameter which you want to be output, then we can use Get<int> to get the output value.

var params = new DynamicParameters();
params.Add("@SkipCount",skip);
params.Add("@PageSize",pageSize);
params.Add("@TotalRows", dbType: DbType.Int32, direction: ParameterDirection.Output);

db.Query<Models.Product>("spCustomPaging", params, commandType: System.Data.CommandType.StoredProcedure);

var output = params.Get<int>("@TotalRows");