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C# - How to Removing Not Visible Rows From DataGridView

Posted on 2014-01-09
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Last Modified: 2014-01-10
Hello everyone.

My environment: Windows 7 Ultimate, C#, VS2010 Ultimate, WinForm.
Target: Windows from XP to 7.
My application adds a line to a DataGridView in 1 minute intervals.
My DataGridView has 15 rows and 8 columns.
In the 16th to add data; first the DataGridView will roll up, insert a blank line and then add the data in this new line.
My question: The rolled up line of DataGridView is still in memory?
If yes, how to remove this line of the DataGridView, keeping in DataGridView memory only the data that are visible?

Thanks in advance, ocaccy
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Question by:ocaccy
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Expert Comment

by:Rikin Shah
ID: 39770248
Hi,

Can you tell us how do you bind the data/new line to DataGridView?
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Author Comment

by:ocaccy
ID: 39770262
Hi,

private void tmr_GET_Tick(object sender,EventArgs e)
	{
	string[] row= { a_i_ler[i_C_AR, 0], a_i_ler[i_C_AR, 1], a_i_ler[i_C_AR, 2], a_i_ler[i_C_AR, 3], a_i_ler[i_C_AR, 4], a_i_ler[i_C_AR, 5], a_i_ler[i_C_AR, 6], a_i_ler[i_C_AR, 7]};
	dataGridView1.Rows.Add(row);
	}

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Thank you,
ocaccy
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LVL 19

Accepted Solution

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Rikin Shah earned 500 total points
ID: 39770268
Hi,

I don't know the internals of how DataGridView works but as and when the row has been added, the blank like will not exist any more. You can check this by taking a row count.

There is no need to explicitly remove the blank new line. The control itself will manage these changes.
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Author Comment

by:ocaccy
ID: 39770297
Hi, Then those rows that are not seen and have no scrollbar have been deleted freeing memory?
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LVL 19

Expert Comment

by:Rikin Shah
ID: 39770517
Hi,

I did not get your last point. Can you clarify?
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Author Closing Comment

by:ocaccy
ID: 39770836
Thank you dear friend.
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