c# base64转字符串实例

string a = "base64字符串与普通字符串互转"; 
 byte[] b = System.Text.Encoding.Default.GetBytes(a);  
 //转成 Base64 形式的 System.String 
 a = Convert.ToBase64String(b); 
 Response.Write(a); 

 byte[] c = Convert.FromBase64String(a); 
 a = System.Text.Encoding.Default.GetString(c); 
 Response.Write(a);

MethodInvoker mi = new MethodInvoker(() =>
  {
   progressBar1.Value += progressBar1.Step;
   this.lblprass.Text = this.progressBar1.Value.ToString() + "/" + this.progressBar1.Maximum.ToString();
  });
  this.BeginInvoke(mi);
  System.Threading.Thread.Sleep(1000);//暂停1秒