Frank100 said:

I am trying to make an AutoComplete Combobox in InfragisticsGridControl..

First you have to set, through design mode which is easier or programatically, the "Style" of the column: DropDownValidate.

After that, you have to fill a ValueList with the values available for the combobox column in the grid:

void SetGridComboBoxValues(List<object> values)
{
    if (grid.DisplayLayout.ValueLists.IndexOf("ComboValues") == -1)
    {
        grid.DisplayLayout.ValueLists.Add("ComboValues");
    }
    else
    {
        grid.DisplayLayout.ValueLists["ComboValues"].ValueListItems.Clear();
    }

    grid.DisplayLayout.ValueLists["ComboValues"].ValueListItems.Add(null, "-- select --");
    foreach (object value in values)
    {
        grid.DisplayLayout.ValueLists["ComboValues"].ValueListItems.Add(value, value.Name);
    }

    grid.DisplayLayout.ValueLists["ComboValues"].DisplayStyle = ValueListDisplayStyle.DisplayText;
    grid.DisplayLayout.Bands[0].Columns["ColumnKey"].ValueList = grid.DisplayLayout.ValueLists["ComboValues"];
}

"ColumnKey" is the key you have set to the column in which you want the combobox to appear, and "ComboValues" has to be an unique string that identifies the ValueList in the ValueLists collection.

Hope this helps,

Emanuel