private void cBox_ComparisonOperator_SelectedIndexChanged(object sender, EventArgs e)
{
if (cBox_ComparisonOperator.SelectedItem != null && (cBox_ComparisonOperator.SelectedItem.ToString() == "介于" || cBox_ComparisonOperator.SelectedItem.ToString() == "未介于"))
{
Panel1.BringToFront();
TextBox3.Text = "";
}
else
{
Panel2.BringToFront();
TextBox1.Text = "";
TextBox2.Text = "";
}
}