private void 修改数据ToolStripMenuItem_Click(object sender, EventArgs e)
 {
     try
     {
         AddExpForm addExpForm = new AddExpForm(ExpListView.SelectedItems[0].Index, ExpListView.SelectedItems[0], this);
         addExpForm.ShowDialog();
     }
     catch { }
 }
        private void 添加数据ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            AddExpForm addExpForm = new AddExpForm(this);

            addExpForm.ShowDialog();
        }