Step 1:- File->New->Project->Visual
C# Projects->Class Library. Select your project name and appropriate
directory click OK
After
Clicking on button ‘OK’, solution explorer adds one C# class ‘Class1.cs’.
In this class we can write our code.
When we double click on Class1.cs, we see a namespace CreatingDLL. We will be use this namespace in our project to access this
class library.
Step 2:- Within Class1.cs we
create a method named ‘sum’ that takes two integers value and
return sum to witch method passed numbers.
using System;
namespace CreatingDLL
{
public class Class1
{
/// <summary>
/// sum is method that take two integer value
and return that sum
/// </summary>
/// <param
name="x"></param>
/// <param
name="y"></param>
/// <returns></returns>
public int sum(int x, int y)
{
return x + y;
}
}
}
Step 3:- Now
build the Application and see bin\debug directory of our project. ‘CreatingDLL.dll’ is
created.
Now we
create another application and take this DLL (CreatingDLL.dll) reference
for accessing DLL’s method.
Steps
for accessing created DLL
Step 4:- File->New->Project->Visual
C# Projects->Windows Form Application.
Step 5:- Designed
windows form as bellow figure.
Step 6:- Add
reference of DLL (CreatingDLL) which we created before few minutes.
After
adding reference of DLL, following windows will appear.
Step 7:- Write
code on button click of Windows Form Application. Before creating object and
making method of Add DLL, add namespace CreatedDLLin project as
bellow code.
using System;
using System.Windows.Forms;
using CreatingDLL;
namespace AccessingDLL
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btnAdd_Click(object sender, EventArgs e)
{
Class1 c1 = new Class1();
try
{
txtResult.Text
=Convert.ToString(c1.sum(Convert.ToInt32(txtNumber1.Text),Convert.ToInt32(txtNumber2.Text)));
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
}
|
Step 8:- Now
build the application and execute project and see output.
