Vishal Monpara’s Blog

Many thanks for the fix.
Had been struggling with this issue for quite some time. I very grateful.
Murray

Thanks for your post. It gave me a template to create a method that looks at an image and coninues to take 25% off of it until it reaches a predetermined file size:

if((File1.PostedFile != null) && (File1.PostedFile.ContentLength > 0))
{
int x = Convert.ToInt32(File1.PostedFile.InputStream.Length);//100009;
string fileName = Path.GetFileName(File1.PostedFile.FileName);
File1.PostedFile.SaveAs(@”C:\temp\” + fileName);
File1.Dispose();
while(x>100000)
{
Bitmap disposablebmp = new Bitmap(@”C:\temp\” + fileName);
Bitmap newbmp = new Bitmap(disposablebmp,
new System.Drawing.Size(Convert.ToInt32(disposablebmp.Width*.75),
Convert.ToInt32(disposablebmp.Height*.75)));
disposablebmp.Dispose();
disposablebmp = newbmp;
FileInfo fi = new FileInfo(@”C:\temp\” + fileName);
x = Convert.ToInt32(fi.Length);
fi.Delete

gf

Thanks for the code, it helped me alot.

Hi,
Thanks for the post, but how come that it didn’t save the new Gif file?

You might want to add to your post you always need to use absolute paths in windows forms when working with images.

In windows forms it isn’t necessary to use abolute path when working with files / directorys
eg: IO.Directory.Create(“test”) will create a dir named test in the dir where your application is.

For images you can’t do that.
Now an easy way to fix that, even if you dont know if the path is relative or not:

filename = new IO.FileInfo(filename).FullName

This will always create the correct absolute path, even if filename is already absolute.

I had used the same code, but still getting the same error when saving the bitmap image in to the folder

I had used the same code, but still getting the same error when saving the bitmap image in to the folder

Thanks for this – I’ve been trying to get to the bottom of this problem for some time, and didn’t think of the file being locked.

your are a star!!! i love you, i was about to shoot somebody… )))))

Keep on truckin dude!!

I tried this….
It did not help

I prefer this method because it never locks the original file…
Image image = null;

using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
image = new Image(fs);
}

Opps
image = new Image(fs);
should be
image = Image.FromStream(fs);

Cheers

good solution

how can i include the file info in vb.net
when i include the file info the compiler give me an error
please tell me the solution

Abdul,

I did not understand your question. I may be able to help you if you can elaborate on the issue.

Thanks

Great, this is just what I was looking for.
Thanks

Might help some ppl I think someone mention it but the key for me was to use the @#% “\\” for folder seperator instead of “\”

Forget what I just wrote, dunno why your exemple works fine with a small path but I have a hard time with “long” path

for exemple try the same piece of code with
%temp%\ImageConvertion\exemple.jpg

Forget what I just wrote, dunno why your exemple works fine with a small path but I have a hard time with “long” path

for exemple try the same piece of code with
%temp%\ImageConvertion\exemple.jpg

thanks for this one…

it has me going for a while there.

FileStream() does not solve the same problem as:
“if the stream was destroyed during the life of the Bitmap object, you cannot successfully access an image that was based on a stream. For example, the Graphics.DrawImage() function may not succeed after the stream has been destroyed.”

http://support.microsoft.com/?id=814675

great job, thanks! Who would have guessed that the load method holds a lock on the file … but that the lock would PREVENT save! crazy!

This was driving me nuts but I was looking at my image buffers, not considering file locks. Thanks!

Hi,

You can also prevent locking an image file using a memory stream to save the image into it and then using a filestream to write the ouput. I Think it is simpler and cleaner. Check the following link:
http://aspalliance.com/319
Vishal’s solution has helped me as well. Good job!

hye,
i was searching for the solution of this error when i came across this page. i m getting an image from web cam and saving it on disk. however, sumtimes it runs just fine but sumtimes it gives this exception. This is the code;

void CaptureImage()
{
try
{
w = videoInfoHeader.BmiHeader.Width;
h = videoInfoHeader.BmiHeader.Height;
if (((w & 0×03) != 0) || (w < 32) || (w > 4096) || (h < 32) || (h > 4096))
return;
stride = w * 3;
handle = GCHandle.Alloc(savedArray, GCHandleType.Pinned);
scan0 = (int)handle.AddrOfPinnedObject();
scan0 += (h – 1) * stride;
b = new Bitmap(w, h, -stride, PixelFormat.Format24bppRgb, (IntPtr)scan0);
handle.Free();
savedArray = null;
LivevideoBox.Image = b;
b.Save(“C:\\abc.jpg”,System.Drawing.Imaging.ImageFormat.Jpeg);

(code contd)
………
b.Save(“C:\\abc.jpg”,System.Drawing.Imaging.ImageFormat.Jpeg);
b.dispose();
}

can u guide to solve this problem?

I have implemented following code to make the thumbnail of original image.
This code is working perfect for one folder “Toys” as mentioned below but when i changed Folder from “Toys” to “Books” in same path it shows error “A generic error occured in gdi+”

so what is the issue?
Pl guide what is going wrong here.

Dim objImage, objThumbnail As System.Drawing.Image
Dim shtWidth, shtHeight As Short
objImage = Drawing.Image.FromFile(“D:\My Documents\Pictures\”)
shtWidth = 71
shtHeight = 88
objThumbnail = objImage.GetThumbnailImage(shtWidth, shtHeight, Nothing, System.IntPtr.Zero)
Response.ContentType = “image/jpeg”
‘objThumbnail.Save(Response.OutputStream, Drawing.Imaging.ImageFormat.Jpeg)
objThumbnail.Save(“C:\inetpub\wwwroot\Toys\thumbnails\Pics1.jpg”)
objImage.Dispose()
objThumbnail.Dispose()

I use similar code to generate a Xbox 360 gamer signature on my site and when moving hosting providers it quit working.

For those of you getting this error and this doesn’t work… check your permissions on the folder you are writing the image to… so that the user is able to WRITE to the folder.

In my case the asp.net/Iuser accounts needed more permissions on the new servers– and I had completely forgotten I did that as I wrote the code for the site.

Here is a function that I created from an almagamation of all the posts I have seen on this issue. The image return should be persistable from ASP.Net. (it works for me) … (read: fine print, i’m not responsible for how you [mis]use my code).

You supplied the final piece in the proper parameters to g.DrawImage(…)

Thank you!

-R

Private Function GetImage(ByVal path As String) As Drawing.Bitmap
Dim output As Drawing.Bitmap = Nothing

Using img As Drawing.Bitmap = New Drawing.Bitmap(path)
output = New Drawing.Bitmap(img.Width, img.Height)
Using g As Drawing.Graphics = Drawing.Graphics.FromImage(output)
g.DrawImage(img, New Drawing.Rectangle(0, 0, output.Width, output.Height), 0, 0, img.Width, img.Height, Drawing.GraphicsUnit.Pixel)
End Using
End Using

Return output

End Function

Hello everyone

this is very nice code ……………………………

—————————————————–
BUT IT NOT SOLVED MY PROBLEM
—————————————————–

My Problem is i have a picture box and that picturebox i draw a multiple image ……
and now i want to save that all image in one
jpg or another format of image so……

HOW CAN I STORE THE ALL IMAGES TO A PERTICULAR IMAGE ………………..

any help apriciated ………………

if found please reply ……….

onlyvish4me@gmail.com

hey man thank a lot bro……u really saved my day..i search a lot on this and found many things but ur solution works for me excelent…

again thx ….

regards,
arpan shah.

Hi I m getting error-a generic error occurred in gdi+ while saving an image to stream

Bitmap b = new Bitmap( w, h, -stride, PixelFormat.Format24bppRgb, (IntPtr) scan0 );
handle.Free();
savedArray = null;
Image old = pictureBox.Image;
pictureBox.Image = b;
stream = new MemoryStream();
b.Save(stream, ImageFormat.Jpeg); // Getting error at this line.
b.Dispose();

I m unable to solve this error.
Any suggestions would be greatly appreciated.

I’m still getting the error

Below is my code,any help would be great

Private Sub savebitmap()
Dim strFile As String = Application.StartupPath + “\” + Patid.ToString + “.png”
Dim originalImage As Image = Image.FromFile(strFile)
Dim tempBmp As New Bitmap(originalImage.Width, originalImage.Height)
Dim g As Graphics = Graphics.FromImage(originalImage)
g.DrawImage(tempBmp, 0, 0, originalImage.Width, originalImage.Height)
originalImage.Dispose()
originalImage = tempBmp
g.Dispose()
originalImage.Save(strFile)
End Sub

Here Is the Sample Code which will be Solved Some Error. By Using this we can not get an Errror Of GDI+ in local host but when we Uploaded into the Web Server it can’t Gives Same error

[WebMethod]
public void SaveImage(String ImageName, Byte[] ByteArray, Int32 Catid, Int32 UserId)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandText = “Insert tbl_ImgSave values(@nam,@catid,@usrid,@imgrate)”;
cmd.Parameters.Add(“@nam”, System.Data.SqlDbType.VarChar, 50).Value = SaveToFolder(ByteArray, ImageName);
cmd.Parameters.Add(“@catid”, System.Data.SqlDbType.Int).Value = Catid;
cmd.Parameters.Add(“@usrid”, System.Data.SqlDbType.Int).Value = UserId;
cmd.Parameters.Add(“@imgrate”, System.Data.SqlDbType.Int).Value = 0;
cmd.Connection = con;
cmd.ExecuteNonQuery();
cmd.Dispose();
con.Close();
}
[WebMethod]
public String SaveToFolder(Byte[] armd, String ImageName)
{
String fn = Guid.NewGuid().ToString() + ImageName.Substring(0) + “.jpg”;

Image newImage = ByteArrayToImage(armd);
//String fn = ImageName + “.jpg”;
String sd = Server.MapPath(“Images”);
if (sd.EndsWith(“\\”) == false)
{
sd += “\\”;
}
sd += fn;
newImage.Save(sd);
return fn;

}
public Image ByteArrayToImage(Byte[] ByteArray)
{
MemoryStream ms = new MemoryStream(ByteArray);
Image ReturnImage = Image.FromStream(ms);
return ReturnImage;
}

Thanks very much – this code was extremely helpful in solving a problem that has been bugging me for a very long time. The way it was written and explained way super. Thanks again

Thanks Jerry Lees. My app was working fine in my development environment, but failed with “A generic error occurred in GDI+. ” whenever I tried to run the published version on the Web server. Gave IIS_USRS write permissions on the folder and all is now good.

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string strPathToImage = “captchaimg/captcha.gif”;
string strText = fncDrawCaptcha(Server.MapPath(strPathToImage));
imgCaptcha.ImageUrl = strPathToImage;
Session["strText"] = strText;

}

}
public string fncDrawCaptcha(string path)
{

int[] BackgroundColor = new int[] { 255, 255, 255 };
bool RandomBackgroundNoiseColor = true;
bool RandomTextColor = true;
int[] BackgroundNoiseColor = new int[] { 150, 150, 150 };
int[] TextColor = new int[] { 200, 200, 200 };
HatchStyle BackgroundNoiseTexture = HatchStyle.Min;
int length = 6;
int height = 100;

int width = 200;
width = width + ((length – 6) * 30);
Random ranRotate = new Random();
string strText = System.Guid.NewGuid().ToString();
strText = strText.Replace(“-”, String.Empty);
strText = strText.Substring(0, length);

Bitmap bmpCanvas = new Bitmap(width, height, PixelFormat.Format24bppRgb);
Graphics graCanvas = Graphics.FromImage(bmpCanvas);
RectangleF recF = new RectangleF(0, 0, width, height);
Brush bruBackground = default(Brush);
SolidBrush letterBrush = default(SolidBrush);

graCanvas.TextRenderingHint = TextRenderingHint.AntiAlias;

if (RandomBackgroundNoiseColor == true)
{
bruBackground = new HatchBrush(BackgroundNoiseTexture, Color.FromArgb((ranRotate.Next(0, 255)), (ranRotate.Next(0, 255)), (ranRotate.Next(0, 255))), Color.FromArgb(BackgroundColor[0], BackgroundColor[1], BackgroundColor[2]));
}
else
{
bruBackground = new HatchBrush(BackgroundNoiseTexture, Color.FromArgb(BackgroundNoiseColor[0], BackgroundNoiseColor[1], BackgroundNoiseColor[2]), Color.FromArgb(BackgroundColor[0], BackgroundColor[1], BackgroundColor[2]));
}

graCanvas.FillRectangle(bruBackground, recF);

if (RandomTextColor == true)
{
letterBrush = new SolidBrush(Color.FromArgb((ranRotate.Next(0, 255)), (ranRotate.Next(0, 255)), (ranRotate.Next(0, 255))));
}
else
{
letterBrush = new SolidBrush(Color.FromArgb(TextColor[0], TextColor[1], TextColor[2]));
}
System.Drawing.Drawing2D.Matrix matRotate = new System.Drawing.Drawing2D.Matrix();
int i = 0;
for (i = 0; i <= strText.Length – 1; i++)
{
matRotate.Reset();
int intChars = strText.Length;
int x = width / (intChars + 1) * i;
int y = height / 2;
//matRotate.RotateAt(ranRotate.Next(-30, 30), new PointF(width / (intChars + 1) * i, height * 0.5) );
matRotate.RotateAt(ranRotate.Next(-30, 30), new PointF(x, y));
graCanvas.Transform = matRotate;
if (i == 0)
{
//draw ‘the text on our image
//graCanvas.DrawString(strText.Chars(i), new Font("Comic Sans MS", 25, FontStyle.Italic), letterBrush, width / (intChars + 1) * i, height * 0.4);
graCanvas.DrawString(strText.Substring(i, 1), new Font("Comic Sans MS", 25, FontStyle.Italic), letterBrush, width / (intChars + 1) * i, 40);
}
else if (i == 1)
{
//draw ‘the text on our image
graCanvas.DrawString(strText.Substring(i, 1), new Font("Arial", 30, FontStyle.Bold), letterBrush, width / (intChars + 1) * i, 10);
}
else if (i == 2)
{
//draw ‘the text on our image
graCanvas.DrawString(strText.Substring(i, 1), new Font("Times New Roman", 25, FontStyle.Italic), letterBrush, width / (intChars + 1) * i, 40);
}
else if (i == 3)
{
//draw ‘the text on our image
graCanvas.DrawString(strText.Substring(i, 1), new Font("Georgia", 35, FontStyle.Bold), letterBrush, width / (intChars + 1) * i, 10);
}
else if (i == 4)
{
//draw ‘the text on our image
graCanvas.DrawString(strText.Substring(i, 1), new Font("Verdana", 25, FontStyle.Italic), letterBrush, width / (intChars + 1) * i, 40);
}
else if (i == 5)
{
//draw ‘the text on our image
graCanvas.DrawString(strText.Substring(i, 1), new Font("Geneva", 30, FontStyle.Bold), letterBrush, width / (intChars + 1) * i, 10);
}
else
{
//draw ‘the text on our image
graCanvas.DrawString(strText.Substring(i, 1), new Font("Verdana", 25, FontStyle.Italic), letterBrush, width / (intChars + 1) * i, 40);
}
graCanvas.ResetTransform();
}
bmpCanvas.Save(path, ImageFormat.Gif);//I got Here A generic error occurred in GDI+.
graCanvas.Dispose();
bmpCanvas.Dispose();
return strText;

}
protected void subCheckCaptcha(object sender, EventArgs e)
{
if (!(txtCaptcha.Text == Session["strText"].ToString()))
{
lbl_Msg.Text = "The characters does not match";
}
else
{
lbl_Msg.Text = "";
Response.Write("alert(‘Captcha text entered successfully’)”);

}

}

muy buen post amigo
muy buena solucion y un plus mas es que reduce el tamaño de las imagenes
sin perder calidad

Actually, the fix is to properly dispose of your objects in order. In C#, I use the using() syntax, which calls Dispose() for me at the end of the scope. So, the fix would be to end your scope before calling Save() on the bitmap.

// new image with transparent Alpha layer
using (var bitmap = new Bitmap(330, 18, PixelFormat.Format32bppArgb))
{
using (var graphics = Graphics.FromImage(bitmap))
{
// add some anti-aliasing
graphics.SmoothingMode = SmoothingMode.AntiAlias;

using (var font = new Font(“Arial”, 14.0f, GraphicsUnit.Pixel))
{
using (var brush = new SolidBrush(Color.White))
{
// draw it
graphics.DrawString(user.Email, font, brush, 0, 0);
}
}
}

// setup the response
Response.Clear();
Response.ContentType = “image/png”;
Response.BufferOutput = true;

// write it to the output stream
bitmap.Save(Response.OutputStream, ImageFormat.Png);
Response.Flush();
}