How can Create DLL File and Use it in .NET Application

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If there is some reusable code ,which has to be used in more than one application,instead of specify the same code again and again,we can make a DLL File. DLL can not be execute independently.
There are some steps to make a .dll file and use it in .Net Application.Please follow steps one by one which are given below.
Step1:- First open your visual studio->go File->New Project->Select class Library->Click OK.
see it:-

Step2:- First open solution Explorer->Right click on  dll exampe->Add Reference->click on .NET->Select System.Windows.Forms->click OK.



Step3:- Write the following code which are given below:-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace dllexample
{
    public class Class1
    {
        public void sum(int i, int ii)
        {
            int res = i + ii;

            MessageBox.Show(res.ToString());
        }

        public void multi(int i, int ii)
        {
            int res = i *ii;
            MessageBox.Show(res.ToString());
        }

    }
}

Step:4- Compile the program (Press F6).

Step5:- Now again open New Project->Select WindowsFormsApplication-> Click OK->Make the design which is as shown below:-

Step6:- Open Solution Explorer->Right click on solution Explorer->Click Add Reference->select Browse->Go dllexample File->Bin->Debug->select dlleample->OK.

Step7:-   Double click on Getsum and Getmultiple button and write the following which are given below.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            dllexample.Class1 obj = new dllexample.Class1();
           int a=Convert.ToInt32(textBox1.Text);
            int b=Convert.ToInt32(textBox2.Text);
        obj.sum(a,b);
            
        }

        private void button2_Click(object sender, EventArgs e)
        {

            dllexample.Class1 obj = new dllexample.Class1();
            int a= Convert.ToInt32(textBox3.Text);
            int b = Convert.ToInt32(textBox4.Text);
            obj.multi(a,b);
        }
    }
}
see it:


Step7:- Now Run the program (press F5) ,the output of program is shown below :-
see it:-
.
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I hope this is helpful for you.
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5 comments:

  1. Thank you very much for you can share your post,the article content written very well,extremely is worth my study.

    ReplyDelete
  2. good post...

    ReplyDelete
  3. simple and good one, thx a lot...

    ReplyDelete
  4. It is possible to download missing DLL files from Fix4dll.com and avoid seeing the most expected error messages like "Msvcr110.dll is missing" or "D3dx9_39.dll is missing".

    ReplyDelete

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