A simple TSQL script to quickly generate c# POCO classes from SQL Server tables and views. You may tweak the output as needed. Not all datatypes are represented but this should save a bunch of boilerplate coding. USAGE: Run this query against the database of your choice. The script will loop through tables, views and their respective columns. Re…

TSQL-to-POCO

declare @tableName varchar(200)
declare @columnName varchar(200)
declare @nullable varchar(50)
declare @datatype varchar(50)
declare @maxlen int
declare @pos int

declare @Stype varchar(50)
declare @isnullable varchar(1)
declare @Sproperty varchar(200)

DECLARE table_cursor CURSOR FOR
SELECT TABLE_NAME
FROM [INFORMATION_SCHEMA].[TABLES]

OPEN table_cursor

FETCH NEXT FROM table_cursor
INTO @tableName

WHILE @@FETCH_STATUS = 0
BEGIN

PRINT 'public class ' + @tableName + ' {'

DECLARE column_cursor CURSOR FOR 
SELECT COLUMN_NAME, IS_NULLABLE, DATA_TYPE, isnull(CHARACTER_MAXIMUM_LENGTH,'-1'), ORDINAL_POSITION
	, CASE WHEN (IS_NULLABLE = 'NO') THEN '' 
	ELSE 
		CASE WHEN (DATA_TYPE IN ('char','nchar','varchar','nvarchar', 'text')) THEN '' ELSE '?' END
	END

from [INFORMATION_SCHEMA].[COLUMNS] 
WHERE [TABLE_NAME] = @tableName
order by [ORDINAL_POSITION]

OPEN column_cursor
FETCH NEXT FROM column_cursor INTO @columnName, @nullable, @datatype, @maxlen, @pos, @isNullable

WHILE @@FETCH_STATUS = 0
BEGIN

-- datatype
select @sType = case @datatype
	when 'int' then 'int'
	when 'smallint' then 'short'
	when 'bigint' then 'long'
	when 'decimal' then 'decimal'	
	when 'float' then 'double'	
	when 'money' then 'decimal'
	when 'char' then 'string'
	when 'text' then 'string'
	when 'nchar' then 'string'
	when 'smallint' then 'short'
	when 'varchar' then 'string'
	when 'nvarchar' then 'string'
	when 'uniqueidentifier' then 'Guid'
	when 'datetime' then 'DateTime'
	when 'datetime2' then 'DateTime'
	when 'date' then 'DateTime'
	when 'bit' then 'bool'
else 'string'
END

	If (@pos = 1)
		PRINT '	[Key]'
	If (@nullable = 'NO' AND @pos > 1)
		PRINT '	[Required]'
	if (@sType = 'string' and @maxLen <> '-1')
		PRINT '	[MaxLength(' +  convert(varchar(4),@maxLen) + ')]'
	if (@sType = 'datetime')
		PRINT '	[Column(TypeName = "datetime")]'
	SELECT @sProperty = '	public ' + @sType + @isNullable + ' ' + @columnName + ' { get; set; }'
	PRINT @sProperty

	--print ''
	FETCH NEXT FROM column_cursor INTO @columnName, @nullable, @datatype, @maxlen, @pos, @isNullable
END
CLOSE column_cursor
DEALLOCATE column_cursor

print '}'
print ''
FETCH NEXT FROM table_cursor 
INTO @tableName

END
CLOSE table_cursor
DEALLOCATE table_cursor