ArgumewntException - please help...

[Arkadow]

Hi!

First - be patient my english isn't good

I've got problem in code listed below... While compilation there's no errors, but while execution JITter throw Argument Exception: This row already belongs to another table.

Please look at this code (I marked line where the exception occurs)br]--------------------------------------------------------
private static String GetPathInfo(Int32 start, Int32 end, Int32 changeCount, DataTable dtMatrixToDB)
{
DataTable dtStops = new DataTable("Przystanki"),
dtTmp = new DataTable();

Int32 i ,j, c, stop, next;

DataColumn dcStop;
DataRow drPath;

String Path = "";


for(i = 0 ; i <= changeCount; i++)
{
dcStop = new DataColumn(i.ToString(),System.Type.GetType("System.Int32"));
dcStop.AllowDBNull = true;
dcStop.DefaultValue = null;
dtStops.Columns.Add(dcStop);
}

Path += "\nDodano kolumny";

drPath = dtStops.NewRow();
drPath["0"] = start;
dtStops.Rows.Add(drPath);

dtTmp = dtStops.Clone();

dtStops.AcceptChanges();
dtTmp.AcceptChanges();


for(i = 0; i <= changeCount; i++)
{
Path += "\n for i = " + i.ToString() + ": ";
foreach(DataRow drStops in dtStops.Rows)
{
if(drStops[i.ToString()] != null)
{
stop = Convert.ToInt32(drStops[i.ToString()]);

Path += stop.ToString() + " (";
/*******************************************************/
/*******************************************************/

for(c = 0; c < count; c++)

/*******************************************************/
/*******************************************************/

{

if(mp[stop,pol[c]])
{
Path += pol[c].ToString() + " ";
drPath = dtStops.NewRow();

for(j = 0; j < i; j++)
{
drPath[j.ToString()] = drStops[j.ToString()];
}

drPath[i.ToString()] = pol[c];
dtTmp.Rows.Add(drPath);
}//if(mp[stop,next])
}//for(c = 0; c < count; c++)

Path+= ") ";
}//if(drStops[i.ToString()] != null)
}//foreach(DataRow drStops in dtStops.Rows)
dtStops.Clear();
dtStops = dtTmp.Copy();
dtTmp.Clear();
dtStops.AcceptChanges();
dtTmp.AcceptChanges();

}//for(i = 0; i <= changecount; i++)
foreach(DataRow drRigthPath in dtStops.Rows)
{
next = Convert.ToInt32(drRigthPath[changeCount.ToString()]);
if(next != end)
dtStops.Rows.Remove(drRigthPath);
}//foreach(DataRow drRigthPath in dtStops.Rows)

dtStops.AcceptChanges();

Path += "\n";

foreach(DataRow dr in dtStops.Rows)
{
foreach(DataColumn dc in dtStops.Columns)
Path += Convert.ToString(dr[dc]) + " - ";
Path += "\n";
}//foreach(DataRow dr in dtStops.Rows)

return Path;
}
-------------------------------------------

Greetings
Arek