sorting an ArrayList with different attributes - C# Discussion Boards

4-Dec-06 11:44

A webservice can just be written to take a byte array. Do you mean a web service ? The FileUpload controller lives in a web page, not a web service.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Re: uploading file

netJP12L4-Dec-06 12:01

netJP12L

4-Dec-06 12:01

Thanks for your answer, Well, I have seen uploading a file through microsoft fileupload controller.
That was ready made controller provided to us and used all the method and properties to upload a file on the desired destination.
Can we get the same functionality while doing the backhand or core prgramming. I want my webservice to upload a file based on the parameter it receives like: public void myupload(string fileFrom,FileTo);.
How can we do?
thanks

Re: uploading file

Christian Graus4-Dec-06 12:06

sorting an ArrayList with different attributes

4-Dec-06 12:06

You can't. A web service needs to be passed a byte[] representing the file, not a file path. A fat client program can provide this, as can a web page, but the web page needs to use the Microsoft conrol, a standard HTML one, or a third party alternative.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Mostafa Siraj4-Dec-06 10:48

4-Dec-06 10:48

hi all
since i can't describe my problem well, plz check this code,
in this code i can sort the list for the x variable -this is fine and working-
but wat if i want also to be able to sort the list with y variable as well.
i can only use IComparable.Compare with x, i want also to be able to sort the list for y variable

how can i do that????

thanks in advance

how can i do that

using System;
using System.Collections;
using System.Collections.Generic;

public class SamplesArrayList
{
public class Test : IComparable
{
public int x;

public int y;
//this is the variable which i want to sort the list with it also

public Test(int x)
{
this.x = x;
}
int IComparable.CompareTo(object x)
{
Test x1 = (Test)x;
return (this.x.CompareTo(x1.x));
}
}

public static void Main()
{
ArrayList test = new ArrayList();
Test l1 = new Test(7);
Test l2 = new Test(3);
Test l3 = new Test(9);
Test l4 = new Test(2);
Test l5 = new Test(4);
test.Add(l1);
test.Add(l2);
test.Add(l3);
test.Add(l4);
test.Add(l5);

test.Sort();

}
}

Christian Graus4-Dec-06 11:09

4-Dec-06 11:09

yosif4444 wrote:
int IComparable.CompareTo(object x)
{
Test x1 = (Test)x;
return (this.x.CompareTo(x1.x));
}

Your compare to can do whatever you like. You return an int, which specifies how far apart two items are, and in what direction. If you want to sort for y within x, then this would work:

if (x == x1.x)
{
return y - x1.y);
}
else
{
return x - x1.x;
}

Or, pass on to the int compareTo, if you want.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Mostafa Siraj4-Dec-06 11:19

4-Dec-06 11:19

i think i described my problem wrong

i want to sort the list with either x or y not with both of them
say
object1 x = 5, y = 10
object2 x = 3, y = 7
object3 x = 7, y = 4

Test.Sort() //for x
output
object2
object1
object3

or

Test.Sort() //for y
output
object3
object2
object1

i hope u got wat i mean

thanks

led mike4-Dec-06 11:24

led mike

4-Dec-06 11:24

yosif4444 wrote:
i want to sort the list with either x or y not with both of them

So what part of "do whatever you like" don't you understand? Roll eyes | :rolleyes:

Christian Graus wrote:
Your compare to can do whatever you like

led mike

Mostafa Siraj4-Dec-06 11:27

4-Dec-06 11:27

I know that i can "do whatever i want" but only in one compare function

i want to write many compare functions depending on the variable i want

Christian Graus4-Dec-06 11:29

4-Dec-06 11:29

OK - I get it.

Create an enum for the different sort orders, then use an instance of that to decide what to do in the compare function.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Mostafa Siraj4-Dec-06 11:32

4-Dec-06 11:32

Yeah you got my point
but can u plz help me with code example, coz i don't know how to implement wat u said

thanks in advance

Christian Graus4-Dec-06 11:42

4-Dec-06 11:42

OK, it's pretty simple

public class SamplesArrayList
{
public class Test : IComparable
{
public enum SortBy { SortByX, SortByY };

private SortBy _sortOrder;
public SortBy
{
get { return _sortOrder; }
set { _sortOrder = value; }
}

public int x;

public int y;
//this is the variable which i want to sort the list with it also

public Test(int x)
{
this.x = x;
}
int IComparable.CompareTo(object x)
{
Test x1 = (Test)x;

switch(SortOrder)
{
int result;

case SortBy.SortByX:
result = (this.x.CompareTo(x1.x));
break;
case SortBy.SortByY:
result = (this.y.CompareTo(x1.y));
break;
default:
throw new ArgumentException("The SortBy enum has been added to, but the CompareTo method has not been updated");
break;
}

return result;
}
}

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

sanjaybs20014-Dec-06 21:06

sanjaybs2001

4-Dec-06 21:06

Try it ---

using System;
using System.Collections;
using System.Collections.Generic;

public class SamplesArrayList
{
static char indi;
public class Test : IComparable
{
public int x;
public int y;
//this is the variable which i want to sort the list with it also
public char indi;
public Test(int x, int y)
{
this.x = x;
this.y = y;
}
int IComparable.CompareTo(object x)
{
if (indi == 'X')
{
Test x1 = (Test)x;
return (this.x.CompareTo(x1.x));
}
else
{
Test y1 = (Test)x;
return (this.y.CompareTo(y1.y));
}
}
}

public static void Main()
{
ArrayList test = new ArrayList();
Test l1 = new Test(7,8);
Test l2 = new Test(3,2);
Test l3 = new Test(9,1);
Test l4 = new Test(2,0);
Test l5 = new Test(4,5);
indi = 'X';
test.Add(l1);
test.Add(l2);
test.Add(l3);
test.Add(l4);
test.Add(l5);

test.Sort();
foreach (Test t in test)
{
Test x1 = t;
Console.WriteLine(x1.x+ " "+ x1.y);
}
Console.ReadKey();
}
}

Christian Graus4-Dec-06 23:14

4-Dec-06 23:14

using a char is obviously nasty as hell, but this is the general idea, yes.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

AccessViolationException was Handled

Russell Jones4-Dec-06 21:02

Russell Jones

4-Dec-06 21:02

this might help

ArrayList.Sort Method (IComparer)

HTH

Russ

Pokkri4-Dec-06 10:02

Pokkri

4-Dec-06 10:02

Dear FRiends,

We have Imported a DLL in c# which made in VC++.While calling the function of imported dll ,named

void Testing_Function(

ref coordpt[,] polygons, ref int[] polygons_vertex_num, ref double[] polygons_rotation_angle, ref int []polygons_flip, ref

double []polygons_rotation_tolerance, ref int []polygons_placement_group, int polygons_num, double surface_width, double

surface_pattern, double x_rapport, double y_rapport, double x_rapport_offset, double y_rapport_offset, int layer_type, int

layer_type_length_option, ref coordpt[,] holes, ref int[] holes_vertex_num, int holes_num, int product_type, int

number_of_product_pieces, int marker_combi_type, double allowed_time, double termination_yield, ref int manual_interrupt,

ref int intermediate_solution, ref int error_message,ref Nesting_Constraint_Type[]constraints, int constraints_number, ref

int[] polygon_placed, ref double[] x_translation, ref double[] y_translation, ref double[] rotation, ref int[] flip, ref

double[] marker_length1, ref double[] marker_length2, ref double[] marker_yield, int dump

);

in c#.
it is giving Exception as

AccessViolationException was Handled
---------------------------------------

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

plz help me out for this problem asap.

Re: AccessViolationException was Handled

Christian Graus4-Dec-06 10:12