Custom DataGridView column ComboBox - pass parameters to function

Hello,

I am using Windows Forms.
I've created a custom DataGridView column - class is called ComboBoxColumn. When I edit cell content, the ComboBox appears in that cell. I am doing this because ComboBox is much faster than the DataGridViewComboBoxColumn. My problem is, that I can't pass any parameters to my combo box - I would like to pass DataSource as parameter. ComboBox is in the class ComboBoxEditingControl. Is is called automatically from the class ComboBoxCell - instance of ComboBoxEditingControl is nowhere created. If I want to add my custom column to the DataGridView, I start with creating the ComboBoxColumn - everything else is automatic. I've redesigned this code from that example:

http://msdn.microsoft.com/en-us/library/7tas5c80.aspx


(it's DateTimePicker inside DataGridView). So, any idea how to pass parameters to class ComboBoxEditingControl?

Here are all my three classes:

public class ComboBoxColumn : DataGridViewColumn
{
    public ComboBoxColumn() : base(new ComboBoxCell())
    {
    }

    public override DataGridViewCell CellTemplate
    {
        get
        {
            return base.CellTemplate;
        }
        set
        {

            // Ensure that the cell used for the template is a ComboBoxCell.
            if (value != null &&
                !value.GetType().IsAssignableFrom(typeof(ComboBoxCell)))
            {
                throw new InvalidCastException("Must be a ComboBoxCell");
            }
           
            base.CellTemplate = value;
        }
    }
}




public class ComboBoxCell : DataGridViewTextBoxCell
{    
    public ComboBoxCell(): base()
    {
       
    }

    public override void InitializeEditingControl(int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
    {
        base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle);


       
    }    

    public override Type EditType
    {
        get
        {
            // Return the type of the editing control that CalendarCell uses.
            return typeof(ComboBoxEditingControl);            
        }

       
    }

   

    public override Type ValueType
    {
        get
        {
            return typeof(string);
        }
    }
}


public class ComboBoxEditingControl : ComboBox, IDataGridViewEditingControl
{    
    DataGridView dataGridView;
    private bool valueChanged = false;
    int rowIndex;


    public ComboBoxEditingControl()
    {
       
    }

    public object EditingControlFormattedValue
    {
        get
        {
            return this.ValueMember.ToString();
        }
        set
        {
            this.ValueMember = value.ToString();
        }
    }

    public object GetEditingControlFormattedValue(DataGridViewDataErrorContexts context)
    {
        return EditingControlFormattedValue;
    }


    public void ApplyCellStyleToEditingControl(DataGridViewCellStyle dataGridViewCellStyle)
    {
        this.Font = dataGridViewCellStyle.Font;
    }

    public int EditingControlRowIndex
    {
        get
        {
            return rowIndex;
        }
        set
        {
            rowIndex = value;
        }
    }

    public bool EditingControlWantsInputKey(Keys keyData, bool dataGridViewWantsInputKey)
    {
        // Let the ComboBox handle the keys listed.
        switch (keyData & Keys.KeyCode)
        {
            case Keys.Left:
            case Keys.Up:
            case Keys.Down:
            case Keys.Right:
            case Keys.Home:
            case Keys.End:
            case Keys.PageDown:
            case Keys.PageUp:
                return true;
            default:
                return !dataGridViewWantsInputKey;
        }
    }

    public void PrepareEditingControlForEdit(bool selectAll)
    {

    }

    public bool RepositionEditingControlOnValueChange
    {
        get
        {
            return false;
        }
    }

    public DataGridView EditingControlDataGridView
    {
        get
        {
            return dataGridView;
        }
        set
        {
            dataGridView = value;
        }
    }

    public bool EditingControlValueChanged
    {
        get
        {
            return valueChanged;
        }
        set
        {
            valueChanged = value;
        }
    }

    public Cursor EditingPanelCursor
    {
        get { return base.Cursor; }
    }

    protected override void OnValueMemberChanged(EventArgs e)
    {
        valueChanged = true;
        this.EditingControlDataGridView.NotifyCurrentCellDirty(true);
        base.OnValueMemberChanged(e);
    }
}