Programming Forums > Application Development > C#

Ghost · Nov 9th, 2005, 11:20 AM

Just wondering how someone would go about converting an image to make a BMP version of any png or jpg image uploaded. I just need to work the convert code. Thanks.

Ghost · Nov 9th, 2005, 11:56 AM

Well I got that code down, but anyone know of a good logical way to resize keeping the correct proportions. Such as 500x250 resized to fit the max width accepted of 300 would then become 300x150.

Here is what I have....

double ratio = ImageLogo.Width.Value / 475;
ImageLogo.Width = ImageLogo.Width.Value * ratio;

bja888 · Nov 9th, 2005, 7:22 PM

Hey Ghost, aparently there isn't anyone here who knows how to deal woth images in C# as I assume form the lack of replays to your comment and mine about pngs.

I destroyed my brian one night comeing up with a code to re-size based on a max width or height while keeping aspect ratio. I really don't want to just give it away but since no one else will be able to help even a little bit I will post it.
I can not right now due to a computer proublem I had yeasterday but as soon as I can get access tot he code again I will put it up for you. Shouldent be more than 2 days.

iignotus · Nov 9th, 2005, 7:38 PM

Quote:

I destroyed my brian one night comeing up with a code to re-size based on a max width or height while keeping aspect ratio. I really don't want to just give it away but since no one else will be able to help even a little bit I will post it.

That's not difficult at all and should not be guarded as if it were some amazing secret, it's just VERY simple math. This is a community programming forum, not Fort Fucking Knox.

Say you have an image that is 500x250 pixels in dimension. You want to reduce the width to 300. You do OriginalWidth / NewWidth to get the Ratio. You then do OriginalHeight / Ratio and that will give you your NewWidth.

A little bit of pseudocode:

(Toggle Plain Text)

OriginalWidth = Image.Width;
OriginalHeight = Image.Height;
NewWidth = 300; // Resize any input image to 300 pixels in width, proportionally.
Ratio = OriginalWidth / NewWidth;
NewHeight = OriginalHeight / Ratio;

bja888 · Nov 9th, 2005, 11:48 PM

I took a lot out. My scipt is a bit more fancy. I'll give you this code no proublem.

(Toggle Plain Text)

decimal maxSize = 30;
string Filename = "somthing.jpg"
System.Drawing.Image.GetThumbnailImageAbort myCallback = new System.Drawing.Image.GetThumbnailImageAbort(logFunk.ThumbnailCallback);
Bitmap myBitmap = new Bitmap(Filename);
System.Drawing.Image myThumbnail;
Size wah = myBitmap.Size;

if(maxSize != null){
int newW = 0;
int newH = 0;
decimal pO = 0;
decimal pT = 0;
bool nopass = false;


if(wah.Width >= wah.Height){
	if(wah.Width > decimal.ToInt32(maxSize)){
		decimal temp_d = decimal.Parse((decimal.Parse(wah.Width.ToString()) / 100).ToString());
		pT = (maxSize / temp_d);
		pO = (decimal.Parse(wah.Height.ToString()) / 100);
		temp_d = (pO * pT);
		newH = decimal.ToInt32(temp_d);
		newW = decimal.ToInt32(maxSize);
	}else{
		nopass = true;
	}
}else{
	if(wah.Height > decimal.ToInt32(maxSize)){
		decimal temp_d = decimal.Parse((decimal.Parse(wah.Height.ToString()) / 100).ToString());
		pT = (maxSize / temp_d);
		pO = (decimal.Parse(wah.Width.ToString()) / 100);
		temp_d = (pO * pT);
		newW = decimal.ToInt32(temp_d);
		newH = decimal.ToInt32(maxSize);
	}else{
		nopass = true;
	}
}

if(nopass){newW = wah.Width; newH = wah.Height;}
myThumbnail = myBitmap.GetThumbnailImage(newW, newH, myCallback, IntPtr.Zero);

}else{
myThumbnail = myBitmap.GetThumbnailImage(wah.Width, wah.Height, myCallback, IntPtr.Zero);
}
myThumbnail.Save("output.jpg");

Ghost · Nov 10th, 2005, 1:33 AM

Thanks guys, turns out the trouble I ran into was the file access error, because it only returned generic GDI+ error, doesnt help a lot but I finally got around to it.

The code is at my office, so I'll post it if any of you guys care to give me some tips on how I can do it better or maybe see what I was trying to do, because sometimes I don't explain it very well. Thanks again for both of your replies.

Ghost · Nov 10th, 2005, 2:27 PM

Call the Resize:

(Toggle Plain Text)

string logoFileName = (LogoFile == string.Empty) ? "images/LogoAlignmentLogo.jpg" : LogoFile;
int ndx = logoFileName.LastIndexOf(LOGO_DIRECTORY + "/");
if(ndx > 0)
	logoFileName = logoFileName.Substring(ndx);
if (System.IO.File.Exists(Server.MapPath(logoFileName)))
{
	Bitmap bitmap = new Bitmap(Server.MapPath(logoFileName));

	// Set Size
	int Height = 100;
	int Width = 475;
	if (bitmap.Width > Width || bitmap.Height > Height)
	{
		ResizeImage(bitmap.Width, bitmap.Height, ref Width, ref Height);
		ImageLogo.Width  = Width;
		ImageLogo.Height = Height;
	}
	else
	{
		ImageLogo.Width  = bitmap.Width;
		ImageLogo.Height = bitmap.Height;
	}

	ImageLogo.ImageUrl = Server.MapPath(logoFileName);
	bitmap.Dispose();
}
else
{
	ImageLogo.Width  = 0;
	ImageLogo.Height = 0;
}

Resize:

(Toggle Plain Text)

private void ResizeImage(int sourceWidth, int sourceHeight, ref int width, ref int height)
{
int Width = width; 
int Height = height;

float nPercent = 0;
float nPercentW = 0;
float nPercentH = 0;

nPercentW = ((float)Width/(float)sourceWidth);
nPercentH = ((float)Height/(float)sourceHeight);
if(nPercentH < nPercentW)
{
	nPercent = nPercentH;
}
else
{
	nPercent = nPercentW;
}
width = (int)(sourceWidth * nPercent);
height = (int)(sourceHeight * nPercent);
}

And then the really fun one.
Resize and Draw:

(Toggle Plain Text)

if(RequiredFieldValidatorLocalFile.IsValid && CustomValidatorLocalFile.IsValid)
{
string extension = Path.GetExtension(LocalFile.PostedFile.FileName);
string path = Path.GetFullPath(AppDomain.CurrentDomain.BaseDirectory) + LOGO_DIRECTORY;
string logoFile = string.Format("{0}/Logo{1}{2}", path, UserInfo.SubscriberID, extension);
try
{
LocalFile.PostedFile.SaveAs(logoFile.Substring(0,logoFile.Length - 4) + ".jpg");
LogoFile = logoFile.Substring(0,logoFile.Length - 4) + ".jpg";

string logoFileName = logoFile.Substring(0,logoFile.Length - 4) + ".jpg";;
int ndx = logoFileName.LastIndexOf(LOGO_DIRECTORY + "/");
if(ndx > 0)
logoFileName = logoFileName.Substring(ndx);

if (System.IO.File.Exists(Server.MapPath(logoFileName)))
{
Bitmap bitmap = new Bitmap(Server.MapPath(logoFileName));
int Width = 600;
int Height = 150;
if (bitmap.Width > Width || bitmap.Height > Height)
{
FixSize(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"), bitmap, Width, Height);
}
else
{
FixSize(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"), bitmap, bitmap.Width, bitmap.Height);
}

ImageLogo.ImageUrl = Server.MapPath(logoFileName);
bitmap.Dispose();
// Delete Original and Rename Temp
File.Delete(Server.MapPath(logoFileName));

File.Move(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"),Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + ".jpg"));

logoFileName = logoFileName.Substring(logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"),(logoFileName.Length - logoFileName.LastIndexOf(LOGO_DIRECTORY + "/")));

}

}

private void FixSize(string SavePath, System.Drawing.Bitmap imgPhoto, int Width, int Height)
{
int sourceWidth = imgPhoto.Width;
int sourceHeight = imgPhoto.Height;
int sourceX = 0;
int sourceY = 0;
int destX = 0;
int destY = 0; 

float nPercent = 0;
float nPercentW = 0;
float nPercentH = 0;

nPercentW = ((float)Width/(float)sourceWidth);
nPercentH = ((float)Height/(float)sourceHeight);
if(nPercentH < nPercentW)
{
nPercent = nPercentH;
//destX = System.Convert.ToInt16((Width - 
//(sourceWidth * nPercent))/2);
}
else
{
nPercent = nPercentW;
//destY = System.Convert.ToInt16((Height - 
//(sourceHeight * nPercent))/2);
}

int destWidth  = (int)(sourceWidth * nPercent);
int destHeight = (int)(sourceHeight * nPercent);

Bitmap bitmapResized = new Bitmap(destWidth, destHeight, 
System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bitmapResized.SetResolution(imgPhoto.HorizontalResolution, 
imgPhoto.VerticalResolution);

Graphics grPhoto = Graphics.FromImage(bitmapResized);
grPhoto.Clear(Color.White);
grPhoto.InterpolationMode = 
System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

grPhoto.DrawImage(imgPhoto, 
new Rectangle(destX,destY,destWidth,destHeight),
new Rectangle(sourceX,sourceY,sourceWidth,sourceHeight),
GraphicsUnit.Pixel);

grPhoto.Dispose();

bitmapResized.Save(SavePath, System.Drawing.Imaging.ImageFormat.Jpeg);
}

if(RequiredFieldValidatorLocalFile.IsValid && CustomValidatorLocalFile.IsValid)
{
string extension = Path.GetExtension(LocalFile.PostedFile.FileName);
string path = Path.GetFullPath(AppDomain.CurrentDomain.BaseDirectory) + LOGO_DIRECTORY;
string logoFile = string.Format("{0}/Logo{1}{2}", path, UserInfo.SubscriberID, extension);
try
{
LocalFile.PostedFile.SaveAs(logoFile.Substring(0,logoFile.Length - 4) + ".jpg");
LogoFile = logoFile.Substring(0,logoFile.Length - 4) + ".jpg";

string logoFileName = logoFile.Substring(0,logoFile.Length - 4) + ".jpg";;
int ndx = logoFileName.LastIndexOf(LOGO_DIRECTORY + "/");
if(ndx > 0)
logoFileName = logoFileName.Substring(ndx);

if (System.IO.File.Exists(Server.MapPath(logoFileName)))
{
Bitmap bitmap = new Bitmap(Server.MapPath(logoFileName));
int Width = 600;
int Height = 150;
if (bitmap.Width > Width || bitmap.Height > Height)
{
FixSize(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"), bitmap, Width, Height);
}
else
{
FixSize(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"), bitmap, bitmap.Width, bitmap.Height);
}

ImageLogo.ImageUrl = Server.MapPath(logoFileName);
bitmap.Dispose();
// Delete Original and Rename Temp
File.Delete(Server.MapPath(logoFileName));

File.Move(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"),Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + ".jpg"));

logoFileName = logoFileName.Substring(logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"),(logoFileName.Length - logoFileName.LastIndexOf(LOGO_DIRECTORY + "/")));

}

}

private void FixSize(string SavePath, System.Drawing.Bitmap imgPhoto, int Width, int Height)
{
int sourceWidth = imgPhoto.Width;
int sourceHeight = imgPhoto.Height;
int sourceX = 0;
int sourceY = 0;
int destX = 0;
int destY = 0; 

float nPercent = 0;
float nPercentW = 0;
float nPercentH = 0;

nPercentW = ((float)Width/(float)sourceWidth);
nPercentH = ((float)Height/(float)sourceHeight);
if(nPercentH < nPercentW)
{
nPercent = nPercentH;
//destX = System.Convert.ToInt16((Width - 
//(sourceWidth * nPercent))/2);
}
else
{
nPercent = nPercentW;
//destY = System.Convert.ToInt16((Height - 
//(sourceHeight * nPercent))/2);
}

int destWidth  = (int)(sourceWidth * nPercent);
int destHeight = (int)(sourceHeight * nPercent);

Bitmap bitmapResized = new Bitmap(destWidth, destHeight, 
System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bitmapResized.SetResolution(imgPhoto.HorizontalResolution, 
imgPhoto.VerticalResolution);

Graphics grPhoto = Graphics.FromImage(bitmapResized);
grPhoto.Clear(Color.White);
grPhoto.InterpolationMode = 
System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

grPhoto.DrawImage(imgPhoto, 
new Rectangle(destX,destY,destWidth,destHeight),
new Rectangle(sourceX,sourceY,sourceWidth,sourceHeight),
GraphicsUnit.Pixel);

grPhoto.Dispose();

bitmapResized.Save(SavePath, System.Drawing.Imaging.ImageFormat.Jpeg);
}

Nov 9th, 2005, 11:20 AM	#1
Ghost Man Bear Pig Hunter Join Date: Jul 2005 Location: NorCal, USA Posts: 295 Rep Power: 4	Create BMP Just wondering how someone would go about converting an image to make a BMP version of any png or jpg image uploaded. I just need to work the convert code. Thanks.

Nov 9th, 2005, 11:48 PM	#5
bja888 Hobbyist Programmer Join Date: Oct 2005 Location: Central, FL Posts: 213 Rep Power: 0	I took a lot out. My scipt is a bit more fancy. I'll give you this code no proublem. (Toggle Plain Text) decimal maxSize = 30; string Filename = "somthing.jpg" System.Drawing.Image.GetThumbnailImageAbort myCallback = new System.Drawing.Image.GetThumbnailImageAbort(logFunk.ThumbnailCallback); Bitmap myBitmap = new Bitmap(Filename); System.Drawing.Image myThumbnail; Size wah = myBitmap.Size; if(maxSize != null){ int newW = 0; int newH = 0; decimal pO = 0; decimal pT = 0; bool nopass = false; if(wah.Width >= wah.Height){ if(wah.Width > decimal.ToInt32(maxSize)){ decimal temp_d = decimal.Parse((decimal.Parse(wah.Width.ToString()) / 100).ToString()); pT = (maxSize / temp_d); pO = (decimal.Parse(wah.Height.ToString()) / 100); temp_d = (pO * pT); newH = decimal.ToInt32(temp_d); newW = decimal.ToInt32(maxSize); }else{ nopass = true; } }else{ if(wah.Height > decimal.ToInt32(maxSize)){ decimal temp_d = decimal.Parse((decimal.Parse(wah.Height.ToString()) / 100).ToString()); pT = (maxSize / temp_d); pO = (decimal.Parse(wah.Width.ToString()) / 100); temp_d = (pO * pT); newW = decimal.ToInt32(temp_d); newH = decimal.ToInt32(maxSize); }else{ nopass = true; } } if(nopass){newW = wah.Width; newH = wah.Height;} myThumbnail = myBitmap.GetThumbnailImage(newW, newH, myCallback, IntPtr.Zero); }else{ myThumbnail = myBitmap.GetThumbnailImage(wah.Width, wah.Height, myCallback, IntPtr.Zero); } myThumbnail.Save("output.jpg"); decimal maxSize = 30; string Filename = "somthing.jpg" System.Drawing.Image.GetThumbnailImageAbort myCallback = new System.Drawing.Image.GetThumbnailImageAbort(logFunk.ThumbnailCallback); Bitmap myBitmap = new Bitmap(Filename); System.Drawing.Image myThumbnail; Size wah = myBitmap.Size; if(maxSize != null){ int newW = 0; int newH = 0; decimal pO = 0; decimal pT = 0; bool nopass = false; if(wah.Width >= wah.Height){ if(wah.Width > decimal.ToInt32(maxSize)){ decimal temp_d = decimal.Parse((decimal.Parse(wah.Width.ToString()) / 100).ToString()); pT = (maxSize / temp_d); pO = (decimal.Parse(wah.Height.ToString()) / 100); temp_d = (pO * pT); newH = decimal.ToInt32(temp_d); newW = decimal.ToInt32(maxSize); }else{ nopass = true; } }else{ if(wah.Height > decimal.ToInt32(maxSize)){ decimal temp_d = decimal.Parse((decimal.Parse(wah.Height.ToString()) / 100).ToString()); pT = (maxSize / temp_d); pO = (decimal.Parse(wah.Width.ToString()) / 100); temp_d = (pO * pT); newW = decimal.ToInt32(temp_d); newH = decimal.ToInt32(maxSize); }else{ nopass = true; } } if(nopass){newW = wah.Width; newH = wah.Height;} myThumbnail = myBitmap.GetThumbnailImage(newW, newH, myCallback, IntPtr.Zero); }else{ myThumbnail = myBitmap.GetThumbnailImage(wah.Width, wah.Height, myCallback, IntPtr.Zero); } myThumbnail.Save("output.jpg");

Nov 10th, 2005, 2:27 PM	#7
Ghost Man Bear Pig Hunter Join Date: Jul 2005 Location: NorCal, USA Posts: 295 Rep Power: 4	Call the Resize: (Toggle Plain Text) string logoFileName = (LogoFile == string.Empty) ? "images/LogoAlignmentLogo.jpg" : LogoFile; int ndx = logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"); if(ndx > 0) logoFileName = logoFileName.Substring(ndx); if (System.IO.File.Exists(Server.MapPath(logoFileName))) { Bitmap bitmap = new Bitmap(Server.MapPath(logoFileName)); // Set Size int Height = 100; int Width = 475; if (bitmap.Width > Width \|\| bitmap.Height > Height) { ResizeImage(bitmap.Width, bitmap.Height, ref Width, ref Height); ImageLogo.Width = Width; ImageLogo.Height = Height; } else { ImageLogo.Width = bitmap.Width; ImageLogo.Height = bitmap.Height; } ImageLogo.ImageUrl = Server.MapPath(logoFileName); bitmap.Dispose(); } else { ImageLogo.Width = 0; ImageLogo.Height = 0; } string logoFileName = (LogoFile == string.Empty) ? "images/LogoAlignmentLogo.jpg" : LogoFile; int ndx = logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"); if(ndx > 0) logoFileName = logoFileName.Substring(ndx); if (System.IO.File.Exists(Server.MapPath(logoFileName))) { Bitmap bitmap = new Bitmap(Server.MapPath(logoFileName)); // Set Size int Height = 100; int Width = 475; if (bitmap.Width > Width \|\| bitmap.Height > Height) { ResizeImage(bitmap.Width, bitmap.Height, ref Width, ref Height); ImageLogo.Width = Width; ImageLogo.Height = Height; } else { ImageLogo.Width = bitmap.Width; ImageLogo.Height = bitmap.Height; } ImageLogo.ImageUrl = Server.MapPath(logoFileName); bitmap.Dispose(); } else { ImageLogo.Width = 0; ImageLogo.Height = 0; } Resize: (Toggle Plain Text) private void ResizeImage(int sourceWidth, int sourceHeight, ref int width, ref int height) { int Width = width; int Height = height; float nPercent = 0; float nPercentW = 0; float nPercentH = 0; nPercentW = ((float)Width/(float)sourceWidth); nPercentH = ((float)Height/(float)sourceHeight); if(nPercentH < nPercentW) { nPercent = nPercentH; } else { nPercent = nPercentW; } width = (int)(sourceWidth * nPercent); height = (int)(sourceHeight * nPercent); } private void ResizeImage(int sourceWidth, int sourceHeight, ref int width, ref int height) { int Width = width; int Height = height; float nPercent = 0; float nPercentW = 0; float nPercentH = 0; nPercentW = ((float)Width/(float)sourceWidth); nPercentH = ((float)Height/(float)sourceHeight); if(nPercentH < nPercentW) { nPercent = nPercentH; } else { nPercent = nPercentW; } width = (int)(sourceWidth * nPercent); height = (int)(sourceHeight * nPercent); } And then the really fun one. Resize and Draw: (Toggle Plain Text) if(RequiredFieldValidatorLocalFile.IsValid && CustomValidatorLocalFile.IsValid) { string extension = Path.GetExtension(LocalFile.PostedFile.FileName); string path = Path.GetFullPath(AppDomain.CurrentDomain.BaseDirectory) + LOGO_DIRECTORY; string logoFile = string.Format("{0}/Logo{1}{2}", path, UserInfo.SubscriberID, extension); try { LocalFile.PostedFile.SaveAs(logoFile.Substring(0,logoFile.Length - 4) + ".jpg"); LogoFile = logoFile.Substring(0,logoFile.Length - 4) + ".jpg"; string logoFileName = logoFile.Substring(0,logoFile.Length - 4) + ".jpg";; int ndx = logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"); if(ndx > 0) logoFileName = logoFileName.Substring(ndx); if (System.IO.File.Exists(Server.MapPath(logoFileName))) { Bitmap bitmap = new Bitmap(Server.MapPath(logoFileName)); int Width = 600; int Height = 150; if (bitmap.Width > Width \|\| bitmap.Height > Height) { FixSize(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"), bitmap, Width, Height); } else { FixSize(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"), bitmap, bitmap.Width, bitmap.Height); } ImageLogo.ImageUrl = Server.MapPath(logoFileName); bitmap.Dispose(); // Delete Original and Rename Temp File.Delete(Server.MapPath(logoFileName)); File.Move(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"),Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + ".jpg")); logoFileName = logoFileName.Substring(logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"),(logoFileName.Length - logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"))); } } private void FixSize(string SavePath, System.Drawing.Bitmap imgPhoto, int Width, int Height) { int sourceWidth = imgPhoto.Width; int sourceHeight = imgPhoto.Height; int sourceX = 0; int sourceY = 0; int destX = 0; int destY = 0; float nPercent = 0; float nPercentW = 0; float nPercentH = 0; nPercentW = ((float)Width/(float)sourceWidth); nPercentH = ((float)Height/(float)sourceHeight); if(nPercentH < nPercentW) { nPercent = nPercentH; //destX = System.Convert.ToInt16((Width - //(sourceWidth * nPercent))/2); } else { nPercent = nPercentW; //destY = System.Convert.ToInt16((Height - //(sourceHeight * nPercent))/2); } int destWidth = (int)(sourceWidth * nPercent); int destHeight = (int)(sourceHeight * nPercent); Bitmap bitmapResized = new Bitmap(destWidth, destHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb); bitmapResized.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); Graphics grPhoto = Graphics.FromImage(bitmapResized); grPhoto.Clear(Color.White); grPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; grPhoto.DrawImage(imgPhoto, new Rectangle(destX,destY,destWidth,destHeight), new Rectangle(sourceX,sourceY,sourceWidth,sourceHeight), GraphicsUnit.Pixel); grPhoto.Dispose(); bitmapResized.Save(SavePath, System.Drawing.Imaging.ImageFormat.Jpeg); } if(RequiredFieldValidatorLocalFile.IsValid && CustomValidatorLocalFile.IsValid) { string extension = Path.GetExtension(LocalFile.PostedFile.FileName); string path = Path.GetFullPath(AppDomain.CurrentDomain.BaseDirectory) + LOGO_DIRECTORY; string logoFile = string.Format("{0}/Logo{1}{2}", path, UserInfo.SubscriberID, extension); try { LocalFile.PostedFile.SaveAs(logoFile.Substring(0,logoFile.Length - 4) + ".jpg"); LogoFile = logoFile.Substring(0,logoFile.Length - 4) + ".jpg"; string logoFileName = logoFile.Substring(0,logoFile.Length - 4) + ".jpg";; int ndx = logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"); if(ndx > 0) logoFileName = logoFileName.Substring(ndx); if (System.IO.File.Exists(Server.MapPath(logoFileName))) { Bitmap bitmap = new Bitmap(Server.MapPath(logoFileName)); int Width = 600; int Height = 150; if (bitmap.Width > Width \|\| bitmap.Height > Height) { FixSize(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"), bitmap, Width, Height); } else { FixSize(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"), bitmap, bitmap.Width, bitmap.Height); } ImageLogo.ImageUrl = Server.MapPath(logoFileName); bitmap.Dispose(); // Delete Original and Rename Temp File.Delete(Server.MapPath(logoFileName)); File.Move(Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + "_temp.jpg"),Server.MapPath(logoFileName.Substring(0,logoFileName.Length - 4) + ".jpg")); logoFileName = logoFileName.Substring(logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"),(logoFileName.Length - logoFileName.LastIndexOf(LOGO_DIRECTORY + "/"))); } } private void FixSize(string SavePath, System.Drawing.Bitmap imgPhoto, int Width, int Height) { int sourceWidth = imgPhoto.Width; int sourceHeight = imgPhoto.Height; int sourceX = 0; int sourceY = 0; int destX = 0; int destY = 0; float nPercent = 0; float nPercentW = 0; float nPercentH = 0; nPercentW = ((float)Width/(float)sourceWidth); nPercentH = ((float)Height/(float)sourceHeight); if(nPercentH < nPercentW) { nPercent = nPercentH; //destX = System.Convert.ToInt16((Width - //(sourceWidth * nPercent))/2); } else { nPercent = nPercentW; //destY = System.Convert.ToInt16((Height - //(sourceHeight * nPercent))/2); } int destWidth = (int)(sourceWidth * nPercent); int destHeight = (int)(sourceHeight * nPercent); Bitmap bitmapResized = new Bitmap(destWidth, destHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb); bitmapResized.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); Graphics grPhoto = Graphics.FromImage(bitmapResized); grPhoto.Clear(Color.White); grPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; grPhoto.DrawImage(imgPhoto, new Rectangle(destX,destY,destWidth,destHeight), new Rectangle(sourceX,sourceY,sourceWidth,sourceHeight), GraphicsUnit.Pixel); grPhoto.Dispose(); bitmapResized.Save(SavePath, System.Drawing.Imaging.ImageFormat.Jpeg); }

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Nov 9th, 2005, 11:56 AM	#2
Ghost Man Bear Pig Hunter Join Date: Jul 2005 Location: NorCal, USA Posts: 295 Rep Power: 4	Well I got that code down, but anyone know of a good logical way to resize keeping the correct proportions. Such as 500x250 resized to fit the max width accepted of 300 would then become 300x150. Here is what I have.... double ratio = ImageLogo.Width.Value / 475; ImageLogo.Width = ImageLogo.Width.Value * ratio;

Nov 9th, 2005, 7:22 PM	#3
bja888 Hobbyist Programmer Join Date: Oct 2005 Location: Central, FL Posts: 213 Rep Power: 0	Hey Ghost, aparently there isn't anyone here who knows how to deal woth images in C# as I assume form the lack of replays to your comment and mine about pngs. I destroyed my brian one night comeing up with a code to re-size based on a max width or height while keeping aspect ratio. I really don't want to just give it away but since no one else will be able to help even a little bit I will post it. I can not right now due to a computer proublem I had yeasterday but as soon as I can get access tot he code again I will put it up for you. Shouldent be more than 2 days.

Nov 10th, 2005, 1:33 AM	#6
Ghost Man Bear Pig Hunter Join Date: Jul 2005 Location: NorCal, USA Posts: 295 Rep Power: 4	Thanks guys, turns out the trouble I ran into was the file access error, because it only returned generic GDI+ error, doesnt help a lot but I finally got around to it. The code is at my office, so I'll post it if any of you guys care to give me some tips on how I can do it better or maybe see what I was trying to do, because sometimes I don't explain it very well. Thanks again for both of your replies.

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Create BMP