C # Production of the number Mask program

Today, the major media are fashionable to participate in the activities through text messages and winning the behavior, the winning numbers are mostly used ' * ' to cover up the middle of their mobile number such as: 138*****345, today, we do is to use a class library to implement this common function, in order to reference in the site and program.

Text: Below, let's start, first of all, with vs2005 to build a C # class library, we named Nummask, his Class1 renamed as Easy to remember other names, I renamed Masker, and then we add the following code:

Nummask

Using System;
Using System.Collections.Generic;
Using System.Text;
Using System.Collections;

Namespace Nummask
{public
    class masker
    {
        ArrayList numbers = new ArrayList ();//define a ArrayList variable, Used to collect numbers passed from the main program
        ArrayList newnum = new ArrayList ();//This is a ArrayList public ArrayList numberchange that returns the processing result
        ( ArrayList number)
        {
            foreach (string num in number)
            {
                numbers. Add (num);//Send received number into numbers
            }
            foreach (string n in numbers)//handle
            {
                char[] temp = N.tochararray ( );
                for (int i = 3; I <= 7; i++)//Replace the number 3 to 7 digits with the * number, there should be a better way, my more stupid, I hope you can give me advice
                {
                    temp[i] = ' * ';
                }
                string s = new string (temp);
                Newnum. Add (s);//Put the mask number into the result array waiting to return the Newnum}}

Then generate it and get the NumMask.dll file

Create a WinForm project and add just the NumMask.dll as a reference. The WinForm interface is as follows:

Instead of using a database as a number source, we use a simple, well-defined number, which in practice can be read to a ArrayList in a database and then invoked nummask to handle it.

ListBox1 is used to display the processing results, let's look at the code for the "Start Conversion" button: Remember to add a using nummask at the beginning;

Button1

private void Button1_Click (object sender, EventArgs e)
        {
            ArrayList al = new ArrayList ();//define Al as the original number array
            ArrayList ab = new ArrayList ();//define AB as the processed result
            al. Add ("13888567890");//Adds number to the original number
            al. ADD ("15878990987");
            Nummask.masker mk = new masker ();//Instantiate a masker
            ab=mk. Numberchange (AL); into which the original data Al is received, with AB receive the result
            foreach (string nums in ab)
            {
                listBox1.Items.Add (nums);//output result
            }
        }

After compiling, you can see the effect of the following diagram:

Summary: This class library still has a lot of places to be reformed, such as judging the validity of data and so on, please give a lot of opinions and suggestions, help me better study and progress.