June 13, 2008 at 3:22 am
Heres a snippet for generating a VB.net class from a table, just replace the target table name
just a few tweaks and you can generate one for C# :hehe:
cheers!
declare @field table (fieldname varchar(50), fieldtype varchar(50))
declare @table_name varchar(50)
set @table_name = 'TargetTable' -- this is the table name
insert into @field
Select sc.name, st.name
from
sysobjects so,
syscolumns sc,
systypes st
where
so.id = sc.id
and so.xtype = 'U'
and so.name = @table_name
and st.xtype = sc.xtype
print 'Public Class ' + @table_name
declare @fieldname varchar(50)
declare @fieldtype varchar(50)
declare @constructor varchar(500)
declare @assign varchar(500)
declare cur cursor for
select fieldname, fieldtype
from @field
open cur
fetch next from cur
into @fieldname, @fieldtype
set @constructor = ''
set @assign = ''
while @@fetch_status = 0
begin
set @fieldtype = case @fieldtype
when 'int' then 'Int32'
when 'tinyint' then 'Int32'
when 'varchar' then 'String'
when 'bit' then 'Boolean'
when 'float' then 'Double'
when 'datetime' then 'Datetime'
else @fieldtype
end
set @constructor = @constructor + 'ByVal v' + @fieldname + ' AS ' + @fieldtype + ', '
set @assign = @assign + '_' + @fieldname + ' = v' + @fieldname + ' : '
print ''
print 'Private _' + @fieldname + ' AS ' + @fieldtype
print 'Public Property ' + @fieldname + '() AS ' + @fieldtype
print ' Get'
print ' return _' + @fieldname
print ' End Get'
print ' Set (value AS ' + @fieldtype + ')'
print ' _' + @fieldname + ' = value'
print ' End Set'
print 'End Property'
print ''
fetch next from cur
into @fieldname, @fieldtype
end
print 'Public Sub New(' + substring(@constructor, 0, len(@constructor)) + ')'
print ' ' + substring(@assign, 0, len(@assign) -1)
print 'End Sub'
print 'End Class'
slow down when you need to hurry, stop when you need to move on,
look back when you need to forget, or you might slip and leave sanity
June 19, 2008 at 9:06 pm
nice article... tnx
June 26, 2008 at 10:59 am
Make sure you post this to the site script library and note it a bit better. As well you should do one for C# to ensure your work is credited.
June 26, 2008 at 8:58 pm
Here is a vesion without any Cursors:
create proc spVB_Make_Class as
--from Lambert Antonio, 26-jun-2008
Set NoCount ON
declare @field table (id int identity primary key clustered, fieldname varchar(50), fieldtype varchar(50))
declare @table_name varchar(50)
set @table_name = 'TargetTable' -- this is the table name
insert into @field
Select sc.name
, case st.name
when 'int' then 'Int32'
when 'tinyint' then 'Int32'
when 'varchar' then 'String'
when 'bit' then 'Boolean'
when 'float' then 'Double'
when 'datetime' then 'Datetime'
else st.name
end As [name]
from
sysobjects so,
syscolumns sc,
systypes st
where
so.id = sc.id
and so.xtype = 'U'
and so.name = @table_name
and st.xtype = sc.xtype
declare @VB table (id int identity primary key clustered, Line varchar(8000))
declare @constructor table (id int identity(1000000,1) primary key clustered, Line varchar(8000))
declare @assign table (id int identity(1000000,1) primary key clustered, Line varchar(8000))
Insert into @VB(Line) Select 'Public Class ' + @table_name
Insert into @VB(Line)
Select '
Private _' + fieldname + ' AS ' + fieldtype + '
Public Property ' + fieldname + '() AS ' + fieldtype + '
Get
return _' + fieldname + '
End Get
Set (value AS ' + fieldtype + ')
_' + fieldname + ' = value
End Set
End Property
'
From @field
Order By ID
Insert into @constructor(Line)
Select 'ByVal v' + fieldname + ' AS ' + fieldtype + ', '
From @field
Order By ID
Insert into @assign(Line)
Select '_' + fieldname + ' = v' + fieldname
From @field
Order By ID
Insert into @VB(Line) Select 'Public Sub New('
Insert into @VB(Line) Select '' + Line From @constructor Order By ID
Insert into @VB(Line) Select ')'
Insert into @VB(Line) Select '' + Line From @assign Order By ID
Insert into @VB(Line) Select '
End Sub
End Class'
Select Line From @VB Order By ID
[font="Times New Roman"]-- RBarryYoung[/font], [font="Times New Roman"] (302)375-0451[/font] blog: MovingSQL.com, Twitter: @RBarryYoung[font="Arial Black"]
Proactive Performance Solutions, Inc. [/font][font="Verdana"] "Performance is our middle name."[/font]
June 27, 2008 at 10:26 am
This script is great:D:D I'm beside myself with joy
Below is my first attempt at posting here or anywhere on the net so be kind.
I've converted the vb code to csharpe and it works for me. Thanks to all for their involvment in doing these things that help others.
David Kelly
SQL novice
C# programmer novice
General old guy
create proc spCSharpe_Make_Class as
--from Lambert Antonio, 26-jun-2008
--converted to C# David Kelly, 06/27/2008
Set NoCount ON
declare @field table (id int identity primary key clustered, fieldname varchar(50), fieldtype varchar(50))
declare @table_name varchar(50)
set @table_name = 'JBMTest' -- this is the table name
insert into @field
Select sc.name
, case st.name
--when 'int' then 'Int32'
when 'money' then 'double'
when 'tinyint' then 'int'
when 'varchar' then 'string'
when 'bit' then 'bool'
when 'float' then 'double'
when 'datetime' then 'DateTime'
else st.name
end As [name]
from
sysobjects so,
syscolumns sc,
systypes st
where
so.id = sc.id
and so.xtype = 'U'
and so.name = @table_name
and st.xtype = sc.xtype
declare @CSharpe table (id int identity primary key clustered, Line varchar(8000))
declare @constructor table (id int identity(1000000,1) primary key clustered, Line varchar(8000))
declare @assign table (id int identity(1000000,1) primary key clustered, Line varchar(8000))
Insert into @CSharpe(Line) Select 'using System'
Insert into @CSharpe(Line) Select 'using System.Collections.Generic'
Insert into @CSharpe(Line) Select 'using System.Text';
Insert into @CSharpe(Line) Select ''; -- blank line
Insert into @CSharpe(Line) Select 'namespace MCL' -- Namespace
Insert into @CSharpe(Line) Select '{' -- Namespace
Insert into @CSharpe(Line) Select ' class ' + @table_name -- Class definition
Insert into @CSharpe(Line) Select ' {' -- Class
Insert into @CSharpe(Line)
Select '
private ' + fieldtype + ' m_' +fieldtype + fieldname + ';
public ' + fieldtype + ' prop'+ fieldname + '
{
get { return m_' + fieldname + '; }
set {
m_' +fieldtype+ fieldname + ' = value;
}
}
'
From @field
Order By ID
Insert into @constructor(Line)
Select 'ByVal v' + fieldname + ' AS ' + fieldtype + ', '
From @field
Order By ID
Insert into @assign(Line)
Select '_' + fieldname + ' = v' + fieldname
From @field
Order By ID
Insert into @CSharpe(Line) Select ' public '+ @table_name+'()'
Insert into @CSharpe(Line) Select ' {'
Insert into @CSharpe(Line) Select ' }'
Insert into @CSharpe(Line) Select ' } // do not go below this line' -- End Class'
Insert into @CSharpe(Line) Select '}' -- End namespace
Select Line From @CSharpe Order By ID
January 8, 2009 at 9:00 pm
Oh my god, I love you!
September 6, 2012 at 3:30 pm
Awesome!! Thank-you so much. Staring at Linq all day was giving me a headache.
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