when generate 10000 matrix bar code it take too much time How to make generating take

Problem

When generating matrix 2d bar code it take per 10000 files matrix bar code generating it take 1 minute
so that how to generating matrix bar code 2d in less time as seconds .
my code as below under button generating :

Code:

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Class1 CLS = new Class1();
                DataTable dt = CLS.ShowalldataSerial(textBox4.Text);

                for (int i = 0; i <= Convert.ToInt32(textBox1.Text); i++)
                {
                    Serial = SRL.Rnd().ToString();
                    txt = "UserID" + dt.Rows[0][0] + "FirmName" + dt.Rows[0][1] + "OrderNo" + dt.Rows[0][2] + "BtachNo" + dt.Rows[0][3] + "Quantity" + dt.Rows[0][4] + "ProductName" + dt.Rows[0][5] + "SerialNo" + Serial;

                    dm.DM(txt, Color.FromName(comboBox1.SelectedItem.ToString()), Color.White).Save(root + "\\" + Serial + ".emf", System.Drawing.Imaging.ImageFormat.Emf);

                }
                MessageBox.Show("Records generated success ");

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when create 10000 in textbox1 it take minute if i write

200000 in textbox1 it take 20 minutes

Code working without any problem and give me result what i need

but it slowly generating data matrix per big quantities

so that what i do to make generating matrix bar code very fast .

Quote:

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Originally Posted by ahmed.barbary

so that what i do to make generating matrix bar code very fast .

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You first must find out what is making it slow.

Although string manipulations can slow things down I suspect the problem is within the dm.DM method. To verify this I suggest you evaluate all parameters of dm.DM and assign them to variables which you pass to dn.DM. The code should work exactly as before.

You then comment out dm.DM so it is not called and run the program again to check what happens. If it is now much faster you know the performance bottleneck is inside dm.DM and that this is the code you must improve. If it still is slow as before you know the problem is the loop and most likely the string processing. In that case all you can do is move everything that does not change between iterations out of the loop. The compiler should do this for you as an optimization but you can always do it yourself in case it doesn't get done for some reason.