Question

I am searching data based on two dates a from field and a To field in Asp.net

I want to prevent the user from entering a From date greater than a To date and display a message to the user Please select a valid date range

  DateTime InvoiceDateFrom = new DateTime();
DateTime InvoiceDateTo = new DateTime();

if (TxtInvoiceDateFrom.Text.Trim() != "")
{

  //DateTime FromDate = DateTime.ParseExact(TxtInvoiceDateFrom.Text.Trim(), "dd/MM/yyyy", null).AddDays(1);
  InvoiceDateFrom = Convert.ToDateTime(TxtInvoiceDateFrom.Text);
  //DateTime toDate = DateTime.ParseExact(TxtInvoiceDateTo.Text.Trim(), "dd/MM/yyyy", null).AddDays(1);

}

if (TxtInvoiceDateTo.Text.Trim() != "")
{
  InvoiceDateTo = Convert.ToDateTime(TxtInvoiceDateTo.Text);
}

Answer 1

if (InvoiceDateTo < InvoiceDateFrom)
    MessageBox.Show("Please select a valid date range.");