如何使用C＃在窗口應用

Question

 private string GenerateID() 
     { 


     } 
     private void auto() 
     { 
      AdmissionNo.Text = "A-" + GenerateID(); 

     } 

低於 A-0001 A-0002甲等的前綴等以生成序列號。

Answer 1

您可以使用下面的代碼。

 `private string GenerateID() { 
     int lastAddedId = 8;// get this value from database 
     string demo = Convert.ToString(lastAddedId+1).PadLeft(4, '0'); 
     return demo; 
     // it will return 0009 

    } 
    private void auto() 
    { 
     AdmissionNo.Text = "A-" + GenerateID(); 
     // here it will set the text as "A-0009" 

    } 

Answer 2

看這個

public class Program 
{ 
    private static int _globalSequence; 

    static void Main(string[] args) 
    { 
     _globalSequence = 0; 

     for (int i = 0; i < 10; i++) 
     { 
      Randomize(i); 
      Console.WriteLine("----------------------------------------->"); 
     } 


     Console.ReadLine(); 
    } 

    static void Randomize(int seed) 
    { 
     Random r = new Random(); 
     if (_globalSequence == 0) _globalSequence = r.Next(); 

     Console.WriteLine("Random: {0}", _globalSequence); 
     int localSequence = Interlocked.Increment(ref _globalSequence); 

     Console.WriteLine("Increment: {0}, Output: {1}", _globalSequence, localSequence); 
    } 

}