RadGridView Performance Issue in Virtual Mode

[Carlo Baliello]

Hello Telerik Team,

I'm using 2010.1 409 Winform Telerik library on both VStudio 2005 and VStudio 2008.

I'm trying to implement a (rad)gridview in Virtual Mode using more than 150000 records/table.

Moving across the first 1000 records is very flawless.
Instead, if I try to scroll to the last records, the grid significantly slow down.

The following code should reproduce the problem:

public Form1()

{

InitializeComponent();

this.radGridView1.EnableSorting = false;

this.radGridView1.EnableFiltering = false;

this.radGridView1.EnableGrouping = false;

this.radGridView1.Dock = DockStyle.Fill;

this.radGridView1.MasterGridViewTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;

this.radGridView1.CellValueNeeded += new GridViewCellValueEventHandler(radGridView1_CellValueNeeded);

this.radGridView1.CellValuePushed += new GridViewCellValueEventHandler(radGridView1_CellValuePushed);

radGridView1.VirtualMode = true;

radGridView1.ColumnCount = 10;

//// Increase RowCount --> increase memory usage: why??

this.radGridView1.RowCount = 150000;

}

void radGridView1_CellValuePushed(object sender, GridViewCellValueEventArgs e)

{

}

void radGridView1_CellValueNeeded(object sender, GridViewCellValueEventArgs e)

{

e.Value = e.RowIndex + e.ColumnIndex;

}

The standard C# DataGridView, with the same code, works without any problem.

Thanks in advance.

Carlo

[Julian Benkov]

Hi Carlo Baliello,

Sorry for the introduced inconvenience.

This a known issue in the RadGridView virtual mode functionality. Currently we are working on redesigning all parts of the grid control to improve the feature set, performance and memory usage. More information for RadGridView vNEXT you can find here.

The improved virtual mode for RadGridView will be available for Q2 2010 release.

Your Telerik points have been updated.

Kind regards,

Julian Benkov
the Telerik team

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