Dynamic Buttons Controls Event Handling WinForms Windows Forms

Dynamic buttons controls Event Handling In windows forms or Winforms applications in .net 2.0,3,5. using C# and VB.NET

many times we need to create controls at runtime or through code behind depending on the real time scenario.

In this post i am going to explain how to add dynamic buttons at runtime and handle the Button Click event in winforms or windows forms applications.

I am creating 3 buttons on Form_Load event and placing them on the form.


Write this code in Load event of windows form.

C# Code

01private void Form1_Load(object sender, EventArgs e)

02        {

03            int x = 50, y = 50;

04            for (int i = 1; i <= 3; i++)

05            {

06                Button btnDynamic = new Button();

07                btnDynamic.Location = new System.Drawing.Point(x, y);

08                btnDynamic.Name = " Dynamic Button " + i;

09                btnDynamic.Size = new System.Drawing.Size(100, 50);

10                btnDynamic.Text = btnDynamic.Name;

11                Controls.Add(btnDynamic);

12                x += 100;

13                btnDynamic.Click += new EventHandler(this.DynamicButtonClick);

14            }

15 

16        }

Here x and y are horizontal and vertical cordinates where dynamically created buttons will be placed.

x is incremented by 100 each time so that buttons don't get placed overlapped.

when button is created, eventhandler for Click Event of button is associated with it in last line of above mentioned method.

Now write below mentioned method signature in the code behind

1private void DynamicButtonClick(object sender, EventArgs e)

2   {

3 

4   }

Method name must be exactly the same u mentioned in eventhandling code, as It's case sensitive. Write this code inside this method

1private void DynamicButtonClick(object sender, EventArgs e)

2        {

3            Button btnDynamic = (Button)sender;

4            btnDynamic.Text = "You Clicked" + btnDynamic.Name;

5 

6        }

VB.NET Code

01Private Sub Form1_Load(sender As Object, e As EventArgs)

02 Dim x As Integer = 50, y As Integer = 50

03 For i As Integer = 1 To 3

04  Dim btnDynamic As New Button()

05  btnDynamic.Location = New System.Drawing.Point(x, y)

06  btnDynamic.Name = " Dynamic Button " & i

07  btnDynamic.Size = New System.Drawing.Size(100, 50)

08  btnDynamic.Text = btnDynamic.Name

09  Controls.Add(btnDynamic)

10  x += 100

11  btnDynamic.Click += New EventHandler(AddressOf Me.DynamicButtonClick)

12 Next

13 

14End Sub

15 

16Private Sub DynamicButtonClick(sender As Object, e As EventArgs)

17 Dim btnDynamic As Button = DirectCast(sender, Button)

18 btnDynamic.Text = "You Clicked" + btnDynamic.Name

19 

20End Sub

Build the application and run.