猪八戒网

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Drawing.Imaging;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btnUpLoad_Click(object sender, EventArgs e)
    {
        Random n = new Random();
        string str="~/" +n.Next(100000).ToString()+ FileUpload1.PostedFile.FileName.Substring(FileUpload1.PostedFile.FileName.IndexOf("."));
        FileUpload1.SaveAs(Server.MapPath(str));
        myGetThumbnailImage(Server.MapPath(str), @"D:\Project\ImageEdit\84283-1.jpg", 120,120, "white");
    }
 /// <summary>
 /// 判断图片大小 Quality(upload)
 /// </summary>
 /// <param name="upLoad">控件</param>
 /// <returns></returns>
    public Boolean Quality(FileUpload upLoad)
    {
        if (upLoad.PostedFile.ContentLength > 50000)
        {
            return false;
        }
        else
        {
            return true;
        }

    }
    public Boolean Size(string path)
    {
        System.Drawing.Image myThumbnail = System.Drawing.Image.FromFile(path);
        if ((myThumbnail.Width > 550) && (myThumbnail.Height > 412.5))
        {
            System.Drawing.Image copyImage = myThumbnail.GetThumbnailImage(550, 412, null, IntPtr.Zero);
            return false;
        }
        else
        {
            return true;
        }
    }
    /// </summary>

    /// <param name="SourceFile">文件在服务器上的物理地址</param>

    /// <param name="strSavePathFile">保存在服务器上的路径</param>

    /// <param name="ThumbWidth">宽度</param>

    /// <param name="ThumbHeight">高度</param>

    /// <param name="BgColor">背景</param>

    public static void myGetThumbnailImage(string SourceFile, string strSavePathFile, int ThumbWidth, int ThumbHeight, string BgColor)
    {

        System.Drawing.Image oImg = System.Drawing.Image.FromFile(SourceFile);
        //小图
        int intwidth, intheight;
        if (oImg.Width > oImg.Height)
        {
            if (oImg.Width > ThumbWidth)
            {
                intwidth = ThumbWidth;
                intheight = (oImg.Height * ThumbWidth) / oImg.Width;
            }
            else
            {
                intwidth = oImg.Width;
                intheight = oImg.Height;
            }
        }
        else
        {
            if (oImg.Height > ThumbHeight)
            {
                intwidth = (oImg.Width * ThumbHeight) / oImg.Height; intheight = ThumbHeight;
            }
            else
            {
                intwidth = oImg.Width; intheight = oImg.Height;
            }
        }

        //构造一个指定宽高的Bitmap
        Bitmap bitmay = new Bitmap(intwidth, intheight);
        Graphics g = Graphics.FromImage(bitmay);
        Color myColor;
        if (BgColor == null) myColor = Color.FromName("white");
        else
            myColor = Color.FromName(BgColor);
        //用指定的颜色填充Bitmap
        g.Clear(myColor);
        g.InterpolationMode = InterpolationMode.HighQualityBicubic;
        //开始画图
        g.DrawImage(oImg, new Rectangle(0, 0, intwidth, intheight), new Rectangle(0, 0, oImg.Width, oImg.Height), GraphicsUnit.Pixel);
        //bitmay.Save(strSavePathFile, System.Drawing.Imaging.ImageFormat.Jpeg);
        KiSaveAsJPEG(bitmay, @"D:\Project\ImageEdit\1.jpg", 50);
        g.Dispose();
        bitmay.Dispose();
        oImg.Dispose();
        //删除源图
        try
        {
            File.Delete(SourceFile);
        }
        catch { }
    }
    /**/
    /// <summary>
    /// 保存JPG时用
    /// </summary>
    /// <param name="mimeType"></param>
    /// <returns>得到指定mimeType的ImageCodecInfo</returns>
    private static ImageCodecInfo GetCodecInfo(string mimeType)
    {
        ImageCodecInfo[] CodecInfo = ImageCodecInfo.GetImageEncoders();
        foreach (ImageCodecInfo ici in CodecInfo)
        {
            if (ici.MimeType == mimeType) return ici;
        }
        return null;
    }


    /**/
    /// <summary>
    /// 保存为JPEG格式，支持压缩质量选项
    /// </summary>
    /// <param name="bmp"></param>
    /// <param name="FileName"></param>
    /// <param name="Qty"></param>
    /// <returns></returns>
    public static bool KiSaveAsJPEG(Bitmap bmp, string FileName, int Qty)
    {
        try
        {
            EncoderParameter p;
            EncoderParameters ps;

            ps = new EncoderParameters(1);

            p = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, Qty);
            ps.Param[0] = p;

            bmp.Save(FileName, GetCodecInfo("image/jpeg"), ps);

            return true;
        }
        catch
        {
            return false;
        }

    }
}