SQL: Generate Dapper Params from SQL Server Objects

FromProcedure.sql

DECLARE @procedure_name sysname = 'dbo.procedure_name'
SELECT 
	OBJECT_SCHEMA_NAME([p].[object_id]) AS [schema],
	OBJECT_NAME([p].[object_id]) AS [procedure_name],
    [p].[name] AS [parameter_name],
	CONCAT('sqlParams.Add("', [p].[name] ,'", ', [p].[name], ', ', [fn].db_type, ');')
FROM sys.[parameters] AS [p]
INNER JOIN sys.[types] AS [t] 
	ON [p].[system_type_id] = [t].[system_type_id]
	AND [p].[user_type_id] = [t].[user_type_id]
CROSS APPLY (
	SELECT 
		CASE t.name
			-- String types with length
			WHEN 'char' THEN CONCAT('DbType.AnsiStringFixedLength, size: ', [p].max_length)
			WHEN 'varchar' THEN 
				CASE WHEN [p].max_length = -1 THEN 'DbType.AnsiString, size: -1' -- MAX
				ELSE CONCAT('DbType.AnsiString, size: ', [p].max_length)
				END
			WHEN 'nchar' THEN CONCAT('DbType.StringFixedLength, size: ', [p].max_length/2)
			WHEN 'nvarchar' THEN 
				CASE WHEN [p].max_length = -1 THEN 'DbType.String, size: -1' -- MAX
				ELSE CONCAT('DbType.String, size: ', [p].max_length/2)
				END
			WHEN 'text' THEN 'DbType.AnsiString, size: -1'
			WHEN 'ntext' THEN 'DbType.String, size: -1'

			-- Numeric types with precision and scale
			WHEN 'decimal' THEN CONCAT('DbType.Decimal, precision: ', [p].[precision], ', scale: ', [p].[scale])
			WHEN 'numeric' THEN CONCAT('DbType.Decimal, precision: ', [p].[precision], ', scale: ', [p].[scale])

			-- Integer types
			WHEN 'bit' THEN 'DbType.Boolean'
			WHEN 'tinyint' THEN 'DbType.Byte'
			WHEN 'smallint' THEN 'DbType.Int16'
			WHEN 'int' THEN 'DbType.Int32'
			WHEN 'bigint' THEN 'DbType.Int64'

			-- Float/Real types
			WHEN 'real' THEN 'DbType.Single'
			WHEN 'float' THEN 'DbType.Double'
			WHEN 'money' THEN 'DbType.Currency'
			WHEN 'smallmoney' THEN 'DbType.Currency'

			-- Date/Time types
			WHEN 'date' THEN 'DbType.Date'
			WHEN 'smalldatetime' THEN 'DbType.DateTime'
			WHEN 'datetime' THEN 'DbType.DateTime'
			WHEN 'datetime2' THEN 'DbType.DateTime2'
			WHEN 'datetimeoffset' THEN 'DbType.DateTimeOffset'
			WHEN 'time' THEN 'DbType.Time'

			-- Binary types
			WHEN 'binary' THEN CONCAT('DbType.Binary, size: ', [p].max_length)
			WHEN 'varbinary' THEN 
				CASE WHEN [p].max_length = -1 THEN 'DbType.Binary, size: -1' -- MAX
				ELSE CONCAT('DbType.Binary, size: ', [p].max_length)
				END
			WHEN 'image' THEN 'DbType.Binary, size: -1'

			-- Other types
			WHEN 'uniqueidentifier' THEN 'DbType.Guid'
			WHEN 'xml' THEN 'DbType.Xml'
			WHEN 'sql_variant' THEN 'DbType.Object'

			ELSE 'DbType.Object' -- Default fallback
		END AS [db_type]
) AS [fn]
WHERE [p].[object_id] = OBJECT_ID(@procedure_name)
ORDER BY [p].[parameter_id]

FromTableOrQuery.sql

DECLARE @sql_query NVARCHAR(MAX) = N'
    SELECT 
        Id, 
        Name, 
        CreatedDate, 
        Amount 
    FROM dbo.YourViewOrComplexQuery
';

-- Use metadata function to get column info
SELECT 
    col.name AS column_name,
    CONCAT('sqlParams.Add("@', col.name ,'", ', col.name, ', ', 
        CASE 
            WHEN system_type_name LIKE 'char%' THEN CONCAT('DbType.AnsiStringFixedLength, size: ', max_length)
            WHEN system_type_name LIKE 'varchar%' THEN 
                CASE WHEN max_length = -1 THEN 'DbType.AnsiString, size: -1'
                ELSE CONCAT('DbType.AnsiString, size: ', max_length) END
            WHEN system_type_name LIKE 'nchar%' THEN CONCAT('DbType.StringFixedLength, size: ', max_length/2)
            WHEN system_type_name LIKE 'nvarchar%' THEN 
                CASE WHEN max_length = -1 THEN 'DbType.String, size: -1'
                ELSE CONCAT('DbType.String, size: ', max_length/2) END
            WHEN system_type_name IN ('text') THEN 'DbType.AnsiString, size: -1'
            WHEN system_type_name IN ('ntext') THEN 'DbType.String, size: -1'
            WHEN system_type_name IN ('decimal', 'numeric') THEN CONCAT('DbType.Decimal, precision: ', precision, ', scale: ', scale)
            WHEN system_type_name = 'bit' THEN 'DbType.Boolean'
            WHEN system_type_name = 'tinyint' THEN 'DbType.Byte'
            WHEN system_type_name = 'smallint' THEN 'DbType.Int16'
            WHEN system_type_name = 'int' THEN 'DbType.Int32'
            WHEN system_type_name = 'bigint' THEN 'DbType.Int64'
            WHEN system_type_name = 'real' THEN 'DbType.Single'
            WHEN system_type_name = 'float' THEN 'DbType.Double'
            WHEN system_type_name IN ('money', 'smallmoney') THEN 'DbType.Currency'
            WHEN system_type_name IN ('date') THEN 'DbType.Date'
            WHEN system_type_name IN ('datetime', 'smalldatetime') THEN 'DbType.DateTime'
            WHEN system_type_name IN ('datetime2') THEN 'DbType.DateTime2'
            WHEN system_type_name = 'datetimeoffset' THEN 'DbType.DateTimeOffset'
            WHEN system_type_name = 'time' THEN 'DbType.Time'
            WHEN system_type_name = 'uniqueidentifier' THEN 'DbType.Guid'
            WHEN system_type_name = 'binary' THEN CONCAT('DbType.Binary, size: ', max_length)
            WHEN system_type_name = 'varbinary' THEN 
                CASE WHEN max_length = -1 THEN 'DbType.Binary, size: -1'
                ELSE CONCAT('DbType.Binary, size: ', max_length) END
            WHEN system_type_name = 'image' THEN 'DbType.Binary, size: -1'
            WHEN system_type_name = 'xml' THEN 'DbType.Xml'
            WHEN system_type_name = 'sql_variant' THEN 'DbType.Object'
            ELSE 'DbType.Object'
        END
    , ');') AS sql_param_line
FROM sys.dm_exec_describe_first_result_set(@sql_query, NULL, 1) AS col
WHERE col.is_hidden = 0
ORDER BY col.column_ordinal;

Could have written the data type conversion as a function, but I did not want to have to create a function if not needed.