winform图片缩放

01.using System;

02.using System.Drawing;

03.using System.Drawing.Imaging;

04.using System.Drawing.Drawing2D;

05.using System.Text;

06.using System.Windows.Forms;

07. 

08.namespace bitmaprerote

09.{

10.public partial class suofang : Form

11.{

12.public suofang()

13.{

14.InitializeComponent();

15.}

16./// <summary>

17./// Resize图片

18./// </summary>

19./// <param name="bmp">原始Bitmap</param>

20./// <param name="newW">新的宽度</param>

21./// <param name="newH">新的高度</param>

22./// <returns>处理以后的图片</returns>

23.public static Bitmap KiResizeImage(Bitmap bmp, int newW, int newH, int Mode)

24.{

25.try

26.{

27.Bitmap map = new Bitmap(newW, newH);

28.Graphics g = Graphics.FromImage(map);

29.// 插值算法的质量

30.g.InterpolationMode = InterpolationMode.HighQualityBicubic;

31.g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);

32.g.Dispose();

33.return map;

34.}

35.catch

36.{

37.return null;

38.}

39.}

40. 

41.private void button1_Click(object sender, EventArgs e)

42.{

43.Bitmap map = new Bitmap("F:\\hj.jpg");

44.map = KiResizeImage(map, 90, 90, 20);

45.pictureBox1.Image = map;

46.}

47.}

48.}