Window桌面表单下拉绑定问题

Question

这是我用来绑定Movie DropDown的代码。在数据源中，我有两个数据用于绑定dropdown，movie dropdown在页面加载事件级别绑定，但抛出错误异常，如Image中所示：

public void BindMovie(string date)
{
    try
    {
        MovieBAL objAccountBAL = new MovieBAL();
        drpMovie.DataSource = objAccountBAL.GetMovieByDate(date).ToList();
        drpMovie.ValueMember = "Id";
        drpMovie.DisplayMember = "MovieName";             
    }
    catch (Exception ex)
    {
        ELog.Write(ex, System.Reflection.MethodBase.GetCurrentMethod().Name);
        System.Windows.Forms.MessageBox.Show(ex.Message);
    }
}

Answer 1

public void BindMovie(string date)
        {
            try
            {
                MovieBAL objAccountBAL = new MovieBAL();
                drpMovie.ValueMember = "Id";
                drpMovie.DisplayMember = "MovieName";             
                drpMovie.DataSource = bjAccountBAL.GetMovieByDate(date).ToList();

            }
            catch (Exception ex)
            {
                ELog.Write(ex, System.Reflection.MethodBase.GetCurrentMethod().Name);
                System.Windows.Forms.MessageBox.Show(ex.Message);
            }
        }

• 为解决此问题，我在分配后最后分配了数据源 'ValueMember'和'DisplayMember'