Nis
20
2007
//thumbnail.aspx oluşturun...aşağıdaki kodları yazın...
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Imaging;
public partial class thumbnail : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)
{
string Image = Request.QueryString["Image"];
if (Image == null)
{
this.ErrorResult();
return;
}
string sSize = Request["Size"];
int Size = 120;
if (sSize != null)
Size = Int32.Parse(sSize);
string Path = Server.MapPath(Request.ApplicationPath) + "\\" + Image;
Bitmap bmp = CreateThumbnail(Path, Size, Size);
if (bmp == null)
{
this.ErrorResult();
return;
}
string OutputFilename = null;
OutputFilename = Request.QueryString["OutputFilename"];
if (OutputFilename != null)
{
if (this.User.Identity.Name == "")
{ bmp.Dispose();this.ErrorResult();}
try
{
bmp.Save(OutputFilename);}
catch (Exception ex)
{
bmp.Dispose();
this.ErrorResult();
return;
}
}
Response.ContentType = "image/jpeg";
bmp.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
bmp.Dispose();
}
private void ErrorResult()
{
Response.Clear();
Response.StatusCode = 404;
Response.End();
}
public static Bitmap CreateThumbnail(string lcFilename, int lnWidth, int lnHeight)
{
System.Drawing.Bitmap bmpOut = null;
try
{
Bitmap loBMP = new Bitmap(lcFilename);
ImageFormat loFormat = loBMP.RawFormat;
decimal lnRatio;
int lnNewWidth = 0;
int lnNewHeight = 0;
if (loBMP.Width < lnWidth && loBMP.Height < lnHeight)
return loBMP;
if (loBMP.Width > loBMP.Height)
{
lnRatio = (decimal)lnWidth / loBMP.Width;
lnNewWidth = lnWidth;
decimal lnTemp = loBMP.Height * lnRatio;
lnNewHeight = (int)lnTemp;
}
else
{
InRatio = (decimal)lnHeight / loBMP.Height;
lnNewHeight = lnHeight;
decimal lnTemp = loBMP.Width * lnRatio;
lnNewWidth = (int)lnTemp;
}
bmpOut = new Bitmap(lnNewWidth, lnNewHeight);
Graphics g = Graphics.FromImage(bmpOut);
g.InterpolationMode =
System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.FillRectangle(Brushes.White, 0, 0, lnNewWidth, lnNewHeight);
g.DrawImage(loBMP, 0, 0, lnNewWidth, lnNewHeight);
loBMP.Dispose();
}
catch
{return null;}
return bmpOut;
}
}
yukarıda thumbnail.aspx oluşturuldu..Resmi çağırıken öreneğin Image1 adlı Image Control için;
<asp:Image ID="Image1" runat="server" ImageUrl="~/thumbnail.aspx?image=Fall800.jpg&size=800"/>
şeklinde çağırın...