I have an Ultragrid control that is bound to a UltraComboEditor(value2 as per code). It has been used since I need to enable multiple value selections and values to be seperated by ",".Filter row for this column seems to take bit of time (even for  row count>500) and is unresponsive for large row count. I compared the same with dropdown with a valuelist that works for large number of rows. Can someone help on the same

private void _ListGrid_InitializeLayout(object sender, InitializeLayoutEventArgs e)
{
ValueList vl = new ValueList();
for(int i=1;i<=6000;i++)
{
vl.ValueListItems.Add(i.ToString());
}
//to check:value as dropdown
_ListGrid.DisplayLayout.Bands[0].Columns["Value"].ValueList = vl;
_ListGrid.DisplayLayout.Bands[0].Columns["Value"].Style = Infragistics.Win.UltraWinGrid.ColumnStyle.DropDownList;

DataTable dt = new DataTable("MyTable");

DataColumn idColumn = new DataColumn("ID", typeof(int));
dt.Columns.Add(idColumn);
DataColumn nameColumn = new DataColumn("Name", typeof(string));
dt.Columns.Add(nameColumn);
// Set the primary key column
dt.PrimaryKey = new DataColumn[] { idColumn };
//to check:any value greater than 500 cauing delay with filter row for Value2 column
for (int i = 1; i <= 6000; i++)
{
DataRow dtChld = dt.NewRow();
dtChld["ID"] = i;
dtChld["Name"] = i;
dt.Rows.Add(dtChld);

}
this._cmbUseCase.DataSource = dt;
this._cmbUseCase.DisplayMember = "Name";
this._cmbUseCase.ValueMember = "ID";
//to check:value 2 as UltraComboEditor mapped to ultrgrid
_ListGrid.DisplayLayout.Bands[0].Columns["Value2"].EditorComponent = _cmbUseCase;
_ListGrid.DisplayLayout.Bands[0].Columns["Value2"].Style = Infragistics.Win.UltraWinGrid.ColumnStyle.FormattedText;

_ListGrid.DisplayLayout.AutoFitStyle = Infragistics.Win.UltraWinGrid.AutoFitStyle.ResizeAllColumns;
_ListGrid.DisplayLayout.Override.FilterUIType = FilterUIType.FilterRow;
}