Guys,
What would this company gain by re-writing their COBOL code in .NET? Was
.NET the platform randomly drawn out of a hat? If you have to do COBOL code,
the best is to do it *in COBOL*!
Trying to emulate COBOL structures in .NET might be cheaper in the
short-term, but much more expensive in the long-run! Maintenance and
client-code is going to be absolutely fugly.
This is getting more and more a candidate for http://thedailywtf.com/ :P
--
Ernst Kuschke
MVP - C# (South Africa)
http://www.ernstkuschke.com
On 11/14/06, RYoung <[EMAIL PROTECTED]> wrote:
Here's something else with attributes:
class Program
{
static void Main(string[] args)
{
Data d1 = new Data();
d1.FirstName = "Ron";
d1.LastName = "Young";
Data d2 = new Data();
d2.FullName = d1.FullName;
d2.FirstName = "Craig";
Console.WriteLine(d1.FullName);
Console.WriteLine(d2.FullName);
}
}
class Data
{
private char[] namebuffer = new char[20];
[Length(20), Offset(0)]
public string FullName { get { return ReadBuffer("FullName"); } set {
SetBuffer("FullName", value); } }
[Length(10), Offset(0)]
public string FirstName { get { return ReadBuffer("FirstName"); } set {
SetBuffer("FirstName", value); } }
[Length(10), Offset(9)]
public string LastName { get { return ReadBuffer("LastName"); } set {
SetBuffer("LastName", value); } }
public Data()
{
for (int i = 0; i < namebuffer.Length; i++)
{
namebuffer[i] = ' ';
}
}
private int GetLength(string fieldName)
{
PropertyInfo prop = this.GetType().GetProperty(fieldName);
LengthAttribute lengthAttribute =
(LengthAttribute)prop.GetCustomAttributes(typeof(LengthAttribute),
false)[0];
return lengthAttribute.Length;
}
private int GetOffset(string fieldName)
{
PropertyInfo prop = this.GetType().GetProperty(fieldName);
OffsetAttribute offsetAttribute =
(OffsetAttribute)prop.GetCustomAttributes(typeof(OffsetAttribute),
false)[0];
return offsetAttribute.Offset;
}
private string ReadBuffer(string fieldName)
{
int length = GetLength(fieldName);
int offset = GetOffset(fieldName);
char[] buffer = new char[length];
for (int i = 0; i < length; i++)
{
buffer[i] = namebuffer[offset];
offset++;
}
return new string(buffer);
}
private void SetBuffer(string fieldName, string value)
{
int offset = GetOffset(fieldName);
for (int i = 0; i < value.Length; i++)
{
namebuffer[offset] = value[i];
offset++;
}
}
}
class LengthAttribute : Attribute
{
private int length;
public int Length { get { return length; } }
public LengthAttribute(int length)
{
this.length = length;
}
}
class OffsetAttribute : Attribute
{
private int offset;
public int Offset { get { return offset; } }
public OffsetAttribute(int offset)
{
this.offset = offset;
}
}
----- Original Message -----
From: "Jon Rothlander" <[EMAIL PROTECTED]>
To: <ADVANCED-DOTNET@DISCUSS.DEVELOP.COM>
Sent: Monday, November 13, 2006 9:21 PM
Subject: [ADVANCED-DOTNET] Data Structures in .Net?
> I'm working on something that is common in other languages, but
something
> that .Net doesn't seem to support, at least it's not common enough for
me
> to
> search the Internet for it or find it in any books. What I am trying to
> do
> is actually simple...
>
> Let's say that you have the following data...
>
> First Name (20)
> Last Name (20)
> Middle Name (20)
> Area Code (3)
> Delimiter2 (1)
> Phone_Prefix (3)
> Delimiter2 (1)
> Phone_Suffix (4)
>
> That data might look like...
>
> Jon Rothlander Gregory 123-123-1234
>
> What I want to do is to create the following variables....
>
> Name_First
> Name_Last
> Name_Middle
> Phone_AreaCode
> Phone_Del1
> Phone_Pre
> Phone_Del2
> Phone_Suf
>
> But I also want to create the following variables as well...
>
> Name_Full
> Phone_Full
>
> What I cannot figure out is how to do something like...
>
> Name_Full = "Jon Rothlander Gregory "
> Phone_Full = "123-123-1234"
>
> Then have the values in the other varibles get filled without having to
> code
> lots of Mid() string commands.
>
> In other lanugauges like C, RPG, COBOL, and other, you can declare a
> variable that points to a given set of memory. Then you can declare
other
> variables to point that that same memory. Then when you update one
> variables, all the other variables that also point to that memory are
> automatically update as well. That's what I'm trying to do.
>
> If you could do this in .Net like you could in COBOL or RPG, you would
do
> something like...
>
> Dim Name_Full as String Length(60) Start(1) End(60)
> Dim Name_First as String Length(20) Start(1) End(20)
> Dim Name_Last as String Length(20) Start(21) End(40)
> Dim Name_Middle as String Length(20) Start(41) End(60)
>
> What you are able to do here is to tell the compiler that Name_Full
starts
> at position 1 and goes to position 60. Name_First starts at 1 and goes
to
> 20. When you move a value into Name_First, the memory is updated and
both
> Name_Full and Name_First are updated because they point to the same
memory
> location.
>
> Is there something like this available in .Net? I have been told that
> there
> is, but no one has been able to provide me a sample.
>
> I know that I can go in and build a class to control this. I have done
> that
> and it works. The problem is that it's way to much work. I want to
find
> something a little less complex. When I built a class to support this,
I
> was able to create the variables as properties over a local property
that
> stores the full set of data. Then each property pulls out a given
> Mid(x,y)
> value based on the definition of the variable. This does work, but it's
a
> major pain. I have been told that .Net does support some various ways
to
> have multiple variables point at the same memory location.
>
> Any ideas how .Net supports that? I'm not sure where to start looking.
>
> Best regards,
> Jon
>
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