کم کردن حجم عکس

[majid_3ma]

سلام من از این کد برای کوچک کردن عکس استفاده میکنم
مشکلم این هست سایز کوچک میشه حجم نسبتا بالا هستش
چه جوری میشه حجم هم کم کرد؟


string FileToResize = Server.MapPath("~/Images/Orginal/" + txtISN0.Text + ".jpg");
string ResizedFile = Server.MapPath("~/Images/Title/" + txtISN0.Text + ".jpg");
string FileName = txtISN0.Text;
Bitmap orgBMP = new Bitmap(FileUpload1.FileContent);
double orgWidth = orgBMP.Width;
double orgHeigh = orgBMP.Height;
int newWidth = Convert.ToInt32(orgBMP.Width);
double bmpraito = (orgHeigh / orgWidth) * newWidth;
int newHeight = orgBMP.Height;
Bitmap newBMP = new Bitmap(orgBMP, newWidth, newHeight);
Graphics OGraphic = Graphics.FromImage(newBMP);
OGraphic.SmoothingMode = SmoothingMode.AntiAlias;
OGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
OGraphic.DrawImage(orgBMP, 0, 0, newWidth, newHeight);
newBMP.Save(FileToResize, ImageFormat.Jpeg);
orgBMP.Dispose();
newBMP.Dispose();
OGraphic.Dispose();

[Mostafa_Dindar]

سلام من از این کد برای کوچک کردن عکس استفاده میکنم
مشکلم این هست سایز کوچک میشه حجم نسبتا بالا هستش
چه جوری میشه حجم هم کم کرد؟


string FileToResize = Server.MapPath("~/Images/Orginal/" + txtISN0.Text + ".jpg");
string ResizedFile = Server.MapPath("~/Images/Title/" + txtISN0.Text + ".jpg");
string FileName = txtISN0.Text;
Bitmap orgBMP = new Bitmap(FileUpload1.FileContent);
double orgWidth = orgBMP.Width;
double orgHeigh = orgBMP.Height;
int newWidth = Convert.ToInt32(orgBMP.Width);
double bmpraito = (orgHeigh / orgWidth) * newWidth;
int newHeight = orgBMP.Height;
Bitmap newBMP = new Bitmap(orgBMP, newWidth, newHeight);
Graphics OGraphic = Graphics.FromImage(newBMP);
OGraphic.SmoothingMode = SmoothingMode.AntiAlias;
OGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
OGraphic.DrawImage(orgBMP, 0, 0, newWidth, newHeight);
newBMP.Save(FileToResize, ImageFormat.Jpeg);
orgBMP.Dispose();
newBMP.Dispose();
OGraphic.Dispose();


فکر میکنم با مطالعه این مقاله (http://dotnetslackers.com/articles/aspnet/Generating-Image-Thumbnails-in-ASP-NET.aspx), مشکل شما برطرف خواهد شد .

موفق باشید

[VB.NET 2010]

مقاله رو بخون !
به جای jpg از فرمت gif استفاده کنی حجم کمتر میشه

[majid_3ma]

مقاله رو بخون !
به جای jpg از فرمت gif استفاده کنی حجم کمتر میشه
اینو میدونم
ولی یک سایت بود که با فرمت jpg آپلود میشد حجمش خیلی کم میشد

[ricky22]

سلام/
این (http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/647d3fd4-f435-43ef-a408-65635a8d1a9e)و این (http://www.velocityreviews.com/forums/t123522-how-to-reduce-image-file-size.html)و نگاه کن
کد زیر از عکس شما یک thumbnailImage می سازه
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.IO;

using System.Drawing;



/// <summary>

/// Summary description for makeThumbnail

/// </summary>

public class makeThumbnail

{

public makeThumbnail(string parmFileIn, out int rc)

{

rc = 0;

string filePathSourceFile = HttpContext.Current.Server.MapPath("~/images/");

string filePathDestFile =
HttpContext.Current.Server.MapPath("~/thumbnails/");

string fullSourceFile = filePathSourceFile + parmFileIn;

//string currentImageFile;

//string thumbnailFile;

int thumbnailHeight;

int thumbnailWidth;

int maxThumbSize = 150;

//int minThumbSize = 120; // 4 x 6 ratio

double hx; double wx;

// create an image object, using the filename we just retrieved

System.Drawing.Image sourceImage =
System.Drawing.Image.FromFile(fullSourceFile);

hx = sourceImage.Height;

wx = sourceImage.Width;

// calc the thumbnail Width and Height: -scale to max with

if (sourceImage.Width > sourceImage.Height) // landscape: width is fixed,
scale height:

{

thumbnailWidth = maxThumbSize;

//thumbnailHeight = minThumbSize;

thumbnailHeight = Convert.ToInt32((hx / wx) * thumbnailWidth);

}

else // portrait: height is fixed at max, scale width:

{

thumbnailHeight = maxThumbSize;

thumbnailWidth = Convert.ToInt32((wx / hx) * thumbnailHeight);

}

System.Drawing.Image thumbnailImage =
sourceImage.GetThumbnailImage(thumbnailWidth, thumbnailHeight, new
System.Drawing.Image.GetThumbnailImageAbort(Thumbn ailCallback),
IntPtr.Zero);


// make a memory stream to work with the image bytes

MemoryStream imageStream = new MemoryStream();

// put the image into the memory stream

thumbnailImage.Save(imageStream, System.Drawing.Imaging.ImageFormat.Jpeg);

string outfile = filePathDestFile + parmFileIn;

try

{

thumbnailImage.Save(outfile);

rc = 77;

}

catch (Exception e)

{

rc = 27;

string dummy = e.ToString();

return;

}

}

/// <summary>

/// </summary>

/// <returns>true</returns>

public bool ThumbnailCallback()

{

return true;

}


}