Created
September 26, 2013 06:56
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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…
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declare @tableName varchar(200) | |
declare @columnName varchar(200) | |
declare @nullable varchar(50) | |
declare @datatype varchar(50) | |
declare @maxlen int | |
declare @sType varchar(50) | |
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') | |
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 | |
WHILE @@FETCH_STATUS = 0 | |
BEGIN | |
-- datatype | |
select @sType = case @datatype | |
when 'int' then 'Int32' | |
when 'decimal' then 'Decimal' | |
when 'money' then 'Decimal' | |
when 'char' then 'String' | |
when 'nchar' then 'String' | |
when 'varchar' then 'String' | |
when 'nvarchar' then 'String' | |
when 'uniqueidentifier' then 'Guid' | |
when 'datetime' then 'DateTime' | |
when 'bit' then 'Boolean' | |
else 'String' | |
END | |
If (@nullable = 'NO') | |
PRINT '[Required]' | |
if (@sType = 'String' and @maxLen <> '-1') | |
Print '[MaxLength(' + convert(varchar(4),@maxLen) + ')]' | |
SELECT @sProperty = 'public ' + @sType + ' ' + @columnName + ' { get; set;}' | |
PRINT @sProperty | |
print '' | |
FETCH NEXT FROM column_cursor INTO @columnName, @nullable, @datatype, @maxlen | |
END | |
CLOSE column_cursor | |
DEALLOCATE column_cursor | |
print '}' | |
print '' | |
FETCH NEXT FROM table_cursor | |
INTO @tableName | |
END | |
CLOSE table_cursor | |
DEALLOCATE table_cursor |
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This is a real gem for any developer in .Net. Thanks for this.
I have added a few lines of code to the original code, so that a developer can generate POCO for only one table or a comma-delimited list of table names. The new logic is marked by START and END comments in code below. To generate POCO for all tables, simply do not set the variable @tableNameForPOCO.