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string d = InvDate.ToString("dd/MM/yyyy h:mm:ss tt",CultureInfo.InvariantCulture).Trim();
sale_invoiceBindingSource.Filter = "InvDate = '"+d+"'";
但這部作品
string d = InvDate.ToString("dd/MM/yyyy h:mm:ss tt",CultureInfo.InvariantCulture).Trim();
sale_invoiceBindingSource.Filter = "InvDate = '20/12/2013 10:45 PM'";
找不出什麼問題