ติดตั้ง
PM> Install-Package iTextSharp -Version 5.5.13.1Continue reading
นำสตริง 111 มาทำเป็น Base64 แล้ว ถอดกลับออกมา
using System; namespace ConsoleApp1 { class Program { static void Main(string[] args) { string plainText1 = "111"; byte[] byteData1 = System.Text.ASCIIEncoding.ASCII.GetBytes(plainText1); string encodeText = System.Convert.ToBase64String(byteData1); Console.WriteLine(encodeText); byte[] byteData2 = System.Convert.FromBase64String(encodeText); string plainText2 = System.Text.ASCIIEncoding.ASCII.GetString(byteData2); Console.WriteLine(plainText2); } } } // MTEx // 111
โปรเจ็กส์แบบ Web ใช้คำสั่ง Field แล้วได้ Error
DataRow row0 = dt.Rows[0]; DateTime createDate = row0.Field<DateTime>("createdate");
'System.Data.DataRow' does not contain a definition for 'Field' and no extension method 'Field' accepting a first argument of type 'System.Data.DataRow' could be found (are you missing a using directive or an assembly reference?)
ทางแก้ ให้ติดตั้ง System.Data.DataSetExtensions
PM> Install-Package System.Data.DataSetExtensions
using System; using System.Threading; namespace ConsoleApp1 { class Program { static void Main(string[] args) { for (int i = 0; i < 5; i++) { Console.WriteLine(i + 1); int milliseconds = 2000; Thread.Sleep(milliseconds); } } } }