Das GridView - 'GridView1' ausgelösten Ereignis RowDeleting die nicht behandelt , aber es ist ein Ereignis

ı wurden traying, um dynamische control-panel mit webusercontrol , delegieren,und ADO.
Auch ı schreiben der Delegaten für das löschen und Bearbeiten ı konfrontiert mit "Die GridView 'GridView1' ausgelösten Ereignis RowDeleting, die nicht behandelt werden." - problem . Kann jemand mir helfen pls
hier meine codes

    protected void Page_Load(object sender, EventArgs e)
    {
        GridView1.DataSource = this.DataSource;
        GridView1.DataBind();
        GridView1.DataKeyNames = new string[] { this.DataKeyNames };

    }

    public object DataSource { get; set; }
    public string DataKeyNames { get; set; }

    public event GridHander RowDeleting;
    public event GridHander RowSawing;


    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        GridViewRow gvr = ((LinkButton)e.CommandSource).Parent.Parent as GridViewRow;
        int rowIndex = gvr.RowIndex;
        object id = GridView1.DataKeys[rowIndex].Value;

        switch (e.CommandName)
        {
            case "Edit":
                GridView1.EditIndex = rowIndex;
                break;

            case "Delete":
                if (RowDeleting != null)
                {
                    GridEventArgs args = new GridEventArgs() 
                    {
                         row=gvr,
                         id=id,
                         rowIndex=rowIndex
                    };
                    RowDeleting.Invoke(e.CommandSource, args);
                }
                break;

            case"Save":
                if (RowSawing != null)
                {
                    GridEventArgs args = new GridEventArgs() 
                    {
                        row = gvr,
                        id = id,
                        rowIndex = rowIndex
                    };
                    RowSawing.Invoke(e.CommandSource, args);

                }
                GridView1.EditIndex = -1;
                break;

            case "Cancel":
                GridView1.EditIndex = -1;
                break;

            default:
                break;
        }
    }
}

//Mein webform

ublic partial class CategoryControlPanel : System.Web.UI.Page
{
    CategoryResposite _categoryResposite=new CategoryResposite();

    protected void Page_Load(object sender, EventArgs e)
    { 
        ControlPanel.DataSource = _categoryResposite.ListCategories();
        ControlPanel.RowDeleting += ControlPanel_RowDeleting;
        ControlPanel.RowSawing += ControlPanel_RowSawing;
    }

    void ControlPanel_RowSawing(object sender, GridEventArgs e)
    {
        throw new NotImplementedException();
    }

    void ControlPanel_RowDeleting(object sender, GridEventArgs e)
    {
        _categoryResposite.DeleteCategories(Convert.ToInt32(e.id));   
    }