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Asked: 2026-05-26T11:03:44+00:00

My application is working 24X7 and I use DataTable for data handling. I need

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My application is working 24X7 and I use DataTable for data handling.

I need to dispose the DataTable everytime. I used Dispose and Clear methods, but the content is only cleared and its instance is still in the memory when I debugged the code.

How can I remove it from memory without depending upon the GC?

Thanks in advance..

EDIT:
This is my code prototype . i have done it in two ways. 

 1     //Methord 1
 2               while (true)
 3               {
 4                   DataTable dt = new DataTable();
 5                   dt.Columns.Add("City", typeof(string));
 6                   dt.Rows.Add("ABC");
 7                   dt.Rows.Add("XYZ");
 8                   dt.Rows.Add("PQR");
 9                   dt.Rows.Add("LMN");
 10                   dt.Dispose();
 11               }
 12    //Methord 2
 13               while (true)
 14               {
 15                   using (DataTable dtable = new DataTable())
 16                   {
 17                       dtable.Columns.Add("City", typeof(string));
 18                       dtable.Rows.Add("ABC");
 19                       dtable.Rows.Add("XYZ");
 20                       dtable.Rows.Add("PQR");
 21                       dtable.Rows.Add("LMN");
 22                   }
 23               }

how will the datatable gets disposed ? if you check with breakpoint , you can stil see datatable ‘dt’ still has values even after calling dispose().even on execution of Line No 11 values are still there.i need to free that memory before execution of line 12 (or before 2nd iteration of while). what should i do here?

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1 Answer

  1. Editorial Team

    If you set every reference to the datatable to nothing/null the underlying data can be garbage collected. When an object is orphaned the dotnet framework will automatically garbage collect when it feels it is appropriate.

    You can tell the garbage collector to collect manually, but it will only collect against objects that don’t have a reference in code.
    http://msdn.microsoft.com/en-us/library/xe0c2357.aspx

    Summary on how dotnet GC works.
    http://dotnetfacts.blogspot.com/2008/05/how-garbage-collector-works-part-1.html

    If the Garbage collector isn’t freeing up the memory, it probably because other objects,Ui Controls/Other business objects you might have written have references to row data in your datatable. For example you are displaying row data, or you have pass a row into another object and it has a reference to this row.

    If your experiencing ever increasing memory, you have a memory leak, i.e. you have an ever increasing number of objects that have references to them and the framework cant garbage collect this data because it thinks it is being used. You will need to look at your code and try and figure out why it is leaking, a memory profiler may help.

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