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This article mainly introduces asp.net how to achieve icon extraction and icon conversion, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

The copy code is as follows:

Using System

Using System.Collections.Generic

Using System.Drawing

Using System.Windows.Forms

Using System.IO

Using System.Resources

Using System.Reflection

Using System.Runtime.InteropServices

Namespace newExtIcon

{

Public partial class MainForm: Form

{

Public Assembly asm = Assembly.GetExecutingAssembly ()

Public MainForm ()

{

InitializeComponent ()

}

Void MainForm_Load (object sender, EventArgs e)

{

Lbl_display.Text = "No Work!"

}

Void btnExtractClick (object sender, EventArgs e)

{

Random rd = new Random ()

OpenFileDialog1.Filter= "applications | * .dll;*.exe | all programs | *. *"

If (openFileDialog1.ShowDialog () = = DialogResult.OK)

{

Icon icon = Icon.ExtractAssociatedIcon (openFileDialog1.FileName)

FileStream fileStream = new FileStream ("d:\" + rd.Next (1mai 100000) + ".ico", FileMode.Create)

Icon.Save (fileStream)

FileStream.Close ()

Lbl_display.Text= "Work Done!"

}

Else

{

Return

}

}

Void BtnChangeClick (object sender, EventArgs e)

{

Size sz = new Size (329.32)

Random rd = new Random ()

OpenFileDialog1.Filter= "Picture | * .jpg;*.png;*.bmp | all programs | *. *"

/ / openFileDialog1.Filter= "Picture | * .jpg;*.png;*.bmp | Application | * .dll;*.exe"

If (openFileDialog1.ShowDialog () = = DialogResult.OK)

{

Using (Bitmap bm = new Bitmap (openFileDialog1.FileName))

{

Using (Bitmap IconBM = new Bitmap (bm,sz))

{

Using (Icon icon_t = Icon.FromHandle (IconBM.GetHicon ()

{

FileStream fileStream = new FileStream ("d:\" + rd.Next (1mai 100000) + ".ico", FileMode.Create)

Icon_t.Save (fileStream)

FileStream.Close ()

Lbl_display.Text= "Work Done!"

}

}

}

}

Else

{

Return

}

}

Void Pic_Click (object sender, System.EventArgs e)

{

Int int_index = Convert.ToInt32 (PictureBox) sender) .tag)

Switch (int_index)

{

Case 1:

This.Close ()

Application.Exit ()

Break

Case 2:

WindowState = FormWindowState.Minimized

Break

Default:

Break

}

}

Void Pic_Hover (object sender,EventArgs e)

{

String name_1 = "btn_close_hightligth.png"

String name_2 = "btn_mini_highlight.png"

Bitmap bm_1 = new Bitmap (asm.GetManifestResourceStream (name_1))

Bitmap bm_2 = new Bitmap (asm.GetManifestResourceStream (name_2))

Int int_index = Convert.ToInt32 (PictureBox) sender) .tag)

Switch (int_index)

{

Case 1:

PictureBox1.BackgroundImage=bm_1

Break

Case 2:

PictureBox2 .BackgroundImage = bm_2

Break

Default:

Break

}

}

Void Pic_Leave (object sender,EventArgs e)

{

String name_1 = "btn_close_down.png"

String name_2 = "btn_mini_down.png"

Bitmap bm_1 = new Bitmap (asm.GetManifestResourceStream (name_1))

Bitmap bm_2 = new Bitmap (asm.GetManifestResourceStream (name_2))

/ / GetMainfestResourceStream gets the stream

Int int_index = Convert.ToInt32 (PictureBox) sender) .tag)

Switch (int_index)

{

Case 1:

PictureBox1.BackgroundImage=bm_1

Break

Case 2:

PictureBox2 .BackgroundImage = bm_2

Break

Default:

Break

}

}

Private const int WM_NCLBUTTONDOWN = 0xA1

Private const int HTCAPTION = 2

[DllImport ("user32.dll")]

Private static extern int SendMessage (int hwnd, int wMsg, int wParam, int lParam)

[DllImport ("user32.dll")]

Private static extern int ReleaseCapture ()

Private void form_MouseDown (object sender, System.Windows.Forms.MouseEventArgs e)

{

/ / release mouse capture for the current application

ReleaseCapture ()

/ / send a message to make the system think that you are pressing the mouse on the title block

SendMessage ((int) this.Handle,WM_NCLBUTTONDOWN,HTCAPTION,0)

}

}

}

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