radupload check image width and height

[sener]

protected void rauIMAGE_ValidatingFile(object sender, Telerik.Web.UI.Upload.ValidateFileEventArgs e)
        {
            //we will check image height and width
            if (rauIMAGE.UploadedFiles.Count > 0)
            {
                foreach (UploadedFile theFile in rauIMAGE.UploadedFiles)
                {
                    //Stream stream = theFile.InputStream; (when uncomment problem occurs)
                    //using (System.Drawing.Bitmap myImage = new System.Drawing.Bitmap(stream,false))
                    //{
                    //    if (myImage.Width > 128 || myImage.Height > 128)
                    //    {
                    //        master.ShowMessage("Image bigger than width :300px by height: 100px not allowed", null, "");
                    //        e.IsValid = false;
                    //    }
                    //}
                    //e.SkipInternalValidation = true;
                }
            }
        }

In the above code block I try to determine uploaded image width and height to be able to prevent from uploading image size larger than (128x128)
but when use inputstream to create new image object I come across with strange error. Also

System.Drawing.Bitmap myImage = new System.Drawing.Bitmap(stream,false) error
System.Drawing.Bitmap myImage = new System.Drawing.Bitmap(theFile.InputStream,false) error
System.Drawing.Bitmap myImage = new System.Drawing.Bitmap(128,128) no error when also comment this line--> (Stream stream = theFile.InputStream)

Do you have any idea about that strange error ??

[sener]

addition to post that Can any one tell me how to determine image width and height if no one have idea about the error?

[Cori]

Hello Sener,

Try something like this:

Image img = Image.FromStream(theFile.InputStream);

if (img.Height > 128 || img.Width > 129)
{
    // code
}

img.Dispose();

I hope that helps.

[Cori]

After reading about the ValidatingFile event in the Telerik Help Documentation. I would have to assume this event is called for every uploaded file, so I would assume you shouldn't access the UploadedFiles collection from this event. I would suggest to use what I posted before but with some modifications. Instead of looping through the UploadedFiles, get InputStrem from e.UploadedFile.

So the full code should look like this:

Image img = Image.FromStream(e.UploadedFile.InputStream);

if (img.Height > 128 || img.Width > 129)
{
    e.IsValid = false;
}

img.Dispose();

// if file is invalid, there is no need
 // to proceed with integrated validation
 e.SkipInternalValidation = !e.IsValid;

I hope that helps.

[sener]

Cori thanks for your replay,

I try it but not solve the problem when I use inputsream the same strange error still occur when uncomment that line problem not occur. May be I forgot something about inputstream usage. I dont know??

System.Drawing.

Image myImage = new System.Drawing.Bitmap(128,128);-->no problem

 

System.Drawing.

Image myImage = new System.Drawing.Bitmap(e.UploadedFile.InputStream); ->problem occurd

 

[sener]

Actual error is that;
System.IO.IOException file used by another process

and solution :

//we will check image height and width

 

if (rauIMAGE.UploadedFiles.Count > 0)

 

{

 

Stream file = e.UploadedFile.InputStream;

 

System.Drawing.

Image myImage = new System.Drawing.Bitmap(file);

 

file.Close();

 

if (myImage.Width > 128 || myImage.Height > 128)

 

{

master.ShowMessage(

"Image bigger than width :128px by height: 128px not allowed", null, "");

 

e.IsValid =

false;

 

}

 

 

//e.SkipInternalValidation = !e.IsValid;

 

 

//ResizeImage();//default resize uploaded image width bigger than 128px to 128px.

 

[Dan Hardin]

I have tried this and everything runs fine with no errors, I save this bytes into a database. however when I try to load the image from the database I get a "Parameter is not valid". If I remove the code that creates the Image object and checks the dimensions the upload and reading from the database works fine. Any ideas?