C# Image.FromFile方法代碼示例

private void DemonstratePropertyItem(PaintEventArgs e)
{

    // Create two images.
    Image image1 = Image.FromFile("c:\\FakePhoto1.jpg");
    Image image2 = Image.FromFile("c:\\FakePhoto2.jpg");

    // Get a PropertyItem from image1.
    PropertyItem propItem = image1.GetPropertyItem(20624);

    // Change the ID of the PropertyItem.
    propItem.Id = 20625;

    // Set the PropertyItem for image2.
    image2.SetPropertyItem(propItem);

    // Draw the image.
    e.Graphics.DrawImage(image2, 20.0F, 20.0F);
}

private void Button2_Click(System.Object sender, System.EventArgs e)
{
    try
    {
        Bitmap image1 = (Bitmap) Image.FromFile(@"C:\Documents and Settings\" +
            @"All Users\Documents\My Music\music.bmp", true);

        TextureBrush texture = new TextureBrush(image1);
        texture.WrapMode = System.Drawing.Drawing2D.WrapMode.Tile;
        Graphics formGraphics = this.CreateGraphics();
        formGraphics.FillEllipse(texture, 
            new RectangleF(90.0F, 110.0F, 100, 100));
        formGraphics.Dispose();
    }
    catch(System.IO.FileNotFoundException)
    {
        MessageBox.Show("There was an error opening the bitmap." +
            "Please check the path.");
    }
}

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow

Publisher: Peer Information
ISBN: 1861007663
*/
// Change the path(s) if needed. If you have VS.NET write:
// "..\\..\\Altamira5.bmp" or @"..\..\Altamira5.bmp"
// otherwise
// "Altamira5.bmp"
// and compile with:
// csc Altamira.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace Altamira
{
public class Altamira1 : Form
{
    Pen p;
    SolidBrush b, bT = new SolidBrush(Color.Black);
    string path = "Altamira5.bmp";  // change the path if needed
    Image im;
    Font f;

    public Altamira1()
    {
        InitializeComponent();
        MyIni();
    }

    private void InitializeComponent()
    {
        this.SuspendLayout();

        this.ClientSize = new System.Drawing.Size(290, 260);
        this.Text = "Altamira";

        this.ResumeLayout(false);
    }
    private void MyIni()
    {
        Color cP = Color.Gray;
        Color cB = Color.LightGray;

        p = new Pen(cP, 6);
        b = new SolidBrush(cB);
        im = Image.FromFile(path);
        f = new Font(new FontFamily("Times New Roman"), 10);
    }
    static void Main() 
    {
        Application.Run(new Altamira1());
    }
    protected override void OnPaint(PaintEventArgs pea)
    {
        Sketch();
        //SketchDBuf();
    }
    private void Sketch()
    {
        Graphics g = Graphics.FromHwnd(this.Handle);  // <=> g = CreateGraphics();

        g.FillRectangle(b, 4, 4, 260, 220);  // passe-partout
        g.DrawRectangle(p, 4, 4, 260, 220);  // frame
        g.DrawImage(im, 33, 35, 200, 145 );  // image
        g.DrawString("ALTAMIRA", f, bT, 180, 190);  // text

        g.Dispose();
    }
    private void SketchDBuf()
    {
        int hh = 3, w = 260, h = 220;   

        Graphics g;
        Bitmap bm = new Bitmap(w + 2*hh, h + 2*hh);
        g = Graphics.FromImage(bm);  // buffer graphics

        g.FillRectangle(b, hh , hh, w, h);  // passe-partout
        g.DrawRectangle(new Pen(Color.Gray,  2*hh), hh, hh, w, h);  // frame
        g.DrawImage(im, hh + 30, hh + 32, 200, 145);  // image
        g.DrawString("ALTAMIRA", f, bT, 180, 190);  // text

        g = Graphics.FromHwnd(this.Handle);  // real graphics
        g.DrawImage(bm, 1, 1);

        g.Dispose();
    }
}
}