Create entities by using MS Sql in asp.net


Hello,

Sometime it is very difficult stuff to create entities for each table.

Here is a stored procedure,where we have to pass just table name only and it will automatically create entities(output as a string message)  as an output.

I’ve table Database named MyTest,which is containing table dbo.tblSLtest which structure is like a

structure

For create the entities for this table execute this stored procedure

DECLARE @TableName VARCHAR(MAX) = ‘tblSLtest’
DECLARE @TableSchema VARCHAR(MAX) = ‘dbo’
DECLARE @result varchar(max) = ”

SET @result = @result + ‘using System;’ + CHAR(13) + CHAR(13)

IF (@TableSchema IS NOT NULL)
BEGIN
SET @result = @result + ‘namespace ‘ + @TableSchema  + CHAR(13) + ‘{‘ + CHAR(13)
END

SET @result = @result + ‘public class ‘ + @TableName + CHAR(13) + ‘{‘ + CHAR(13)

SET @result = @result + ‘#region Instance Properties’ + CHAR(13)

SELECT @result = @result + CHAR(13)
+ ‘ public ‘ + ColumnType + ‘ ‘ + ColumnName + ‘ { get; set; } ‘ + CHAR(13)
FROM
(
SELECT  c.COLUMN_NAME   AS ColumnName
, CASE c.DATA_TYPE
WHEN ‘bigint’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Int64?’ ELSE ‘Int64’ END
WHEN ‘binary’ THEN ‘Byte[]’
WHEN ‘bit’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Boolean?’ ELSE ‘Boolean’ END
WHEN ‘char’ THEN ‘String’
WHEN ‘date’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘DateTime?’ ELSE ‘DateTime’ END
WHEN ‘datetime’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘DateTime?’ ELSE ‘DateTime’ END
WHEN ‘datetime2’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘DateTime?’ ELSE ‘DateTime’ END
WHEN ‘datetimeoffset’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘DateTimeOffset?’ ELSE ‘DateTimeOffset’ END
WHEN ‘decimal’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Decimal?’ ELSE ‘Decimal’ END
WHEN ‘float’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Single?’ ELSE ‘Single’ END
WHEN ‘image’ THEN ‘Byte[]’
WHEN ‘int’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Int32?’ ELSE ‘Int32’ END
WHEN ‘money’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Decimal?’ ELSE ‘Decimal’ END
WHEN ‘nchar’ THEN ‘String’
WHEN ‘ntext’ THEN ‘String’
WHEN ‘numeric’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Decimal?’ ELSE ‘Decimal’ END
WHEN ‘nvarchar’ THEN ‘String’
WHEN ‘real’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Double?’ ELSE ‘Double’ END
WHEN ‘smalldatetime’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘DateTime?’ ELSE ‘DateTime’ END
WHEN ‘smallint’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Int16?’ ELSE ‘Int16’END
WHEN ‘smallmoney’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Decimal?’ ELSE ‘Decimal’ END
WHEN ‘text’ THEN ‘String’
WHEN ‘time’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘TimeSpan?’ ELSE ‘TimeSpan’ END
WHEN ‘timestamp’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘DateTime?’ ELSE ‘DateTime’ END
WHEN ‘tinyint’ THEN
CASE C.IS_NULLABLE
WHEN ‘YES’ THEN ‘Byte?’ ELSE ‘Byte’ END
WHEN ‘uniqueidentifier’ THEN ‘Guid’
WHEN ‘varbinary’ THEN ‘Byte[]’
WHEN ‘varchar’ THEN ‘String’
ELSE ‘Object’
END AS ColumnType
, c.ORDINAL_POSITION
FROM    INFORMATION_SCHEMA.COLUMNS c
WHERE   c.TABLE_NAME = @TableName and ISNULL(@TableSchema, c.TABLE_SCHEMA) = c.TABLE_SCHEMA
) t
ORDER BY t.ORDINAL_POSITION

SET @result = @result + CHAR(13) + ‘#endregion Instance Properties’ + CHAR(13)

SET @result = @result  + ‘}’ + CHAR(13)

IF (@TableSchema IS NOT NULL)
BEGIN
SET @result = @result + CHAR(13) + ‘}’
END

PRINT @result

and you we have output like(with corresponding datatypes)

output

So now enjoy with entities…

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