MAX_ID with string generation in ASP.NET

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Hi,
I want to generate maxid with string in asp.net.
For example,
I have the values "P0000". when i execute i want to get new id as "P0001".

Posted 11-Aug-11 0:53am

gani7787

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2 solutions

Solution 1

This will work as long as the format of your string doesn't change (and "P9999" as upper bound).

C#

public static String nextID(String id)
{
  int n = int.Parse(id.Substring(1));
  n++;
  return id[0]+n.ToString("D4");
}

Posted 11-Aug-11 1:22am

CPallini

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thatraja 11-Aug-11 8:19am

5!

CPallini 11-Aug-11 8:44am

Thank you.

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senthil sennu · Accepted Answer · 2011-08-11T02:52:00

C#

This approach will be applicable for any format of the Maxid String. For Example : D0001, ABC0001, 0001. It wont support,if the character is coming after number (0001D)

//Calling
String id = "D0001";
GenerateID(id);

//Method
public String GenerateID(String id)
{
        int pos=0;
        for (int i = id.Length; i>0 ; i--)
        {
            if (Char.IsNumber(id[i - 1]))
            {
                pos = i - 1;
            }
            else
                break;
        }
        return id.Substring(0, pos) + (int.Parse(id.Substring(pos, id.Length - pos)) + 1).ToString("D" + (id.Length - pos));
}

Regards,
Senthil S