I'm creating a custom media file uploader because we wanted to add some custom validation. Question is how do I set the image thumbnail size generated by it?

I'm a little confused on where to put the custom validation and the generation of thumbsize.

Here's my code

using
 
 
 System;
using
 
 
 System.Collections.Generic;
using
 
 
 System.Linq;
using
 
 
 System.Text;
using
 
 
 System.Web;
using
 
 
 System.Drawing;
using
 
 
 System.Drawing.Imaging;
using
 
 
 System.Drawing.Drawing2D;
using
 
 
 System.IO;
using
 
 
 umbraco.cms.businesslogic.datatype;
namespace
 
 
 DataEditorSettings.CustomDataEditor
{
 
 
class DataType : umbraco.cms.businesslogic.datatype.AbstractDataEditor
{
 
 
private MediaUploadControl control = new MediaUploadControl();
[
 
DataEditorSetting("Media Upload", description = "Media upload with custom validation")]
 
 
public string Text { get; set; }
 
 
// Set ID, needs to be unique
 
 
public override Guid Id
{
 
 
get
{
 
 
return new Guid("49bcd88b-e2fe-4fde-93df-99e4b48cf04e");
}
}
 
 
//Set name, (is what appears in data editor dropdown)
 
 
public override string DataTypeName
{
 
 
get
{
 
 
return "Custom Media Upload";
}
}
 
 
public DataType()
{
 
 
//set rendercontrol
 
 
base.RenderControl = control;
 
 
//init event
control.Init += 
 
new EventHandler(control_Init);
 
 
 
//save event
 
 
base.DataEditorControl.OnSave += new umbraco.cms.businesslogic.datatype.AbstractDataEditorControl.SaveEventHandler(DataEditorControl_OnSave);
}
 
 
void control_Init(object sender, EventArgs e)
{
}
 
 
void DataEditorControl_OnSave(EventArgs e)
{
 
 
if (getGifOrJpg(control.Filename) || (validateFileSize(control.Filename, 100)))
{
 
 
base.Data.Value = control.Filename;
}
}
 
 
public void createThumb(Stream srcImage, int thumbWidth, int thumbHeight, string fileName)
{
 
 
Size reqSize = new Size();
reqSize.Width = thumbWidth;
reqSize.Height = thumbHeight;
 
 
Bitmap sourceImg = new Bitmap(srcImage);
 
 
ImageFormat imgFormat = sourceImg.RawFormat;
 
 
Size thumbSize = getSize(reqSize, sourceImg.Size);
 
 
Bitmap thumbImage = null;
thumbImage = 
 
new Bitmap(thumbSize.Width, thumbSize.Height);
 
 
Graphics canvas = Graphics.FromImage(thumbImage);
canvas.SmoothingMode = 
 
SmoothingMode.AntiAlias;
canvas.InterpolationMode = 
 
InterpolationMode.HighQualityBicubic;
canvas.PixelOffsetMode = 
 
PixelOffsetMode.HighQuality;
canvas.DrawImage(sourceImg, 
 
new Rectangle(new Point(0, 0), thumbSize));
thumbImage.Save(fileName);
}
 
 
private Size getSize(Size reqSize, Size currSize)
{
 
 
Size newSize = new Size();
 
 
int reqWidth = reqSize.Width, reqHeight = reqSize.Height;
 
 
int currWidth = currSize.Width;
 
 
int currHeight = currSize.Height;
 
 
int temp = 0;
 
 
if (currWidth > reqWidth || currHeight > reqHeight)
{
 
 
if (currWidth > currHeight)
{
newSize.Width = reqWidth;
temp = currHeight * newSize.Width;
newSize.Height = temp / currWidth;
 
 
if (newSize.Height > reqHeight)
{
newSize.Height = reqHeight;
temp = currWidth * newSize.Height;
newSize.Width = temp / currHeight;
}
}
 
 
if (currWidth < currHeight)
{
newSize.Height = reqHeight;
temp = currWidth * newSize.Height;
newSize.Width = temp / currHeight;
 
 
if (newSize.Width > reqWidth)
{
newSize.Width = reqWidth;
temp = currHeight * newSize.Width;
newSize.Height = temp / currWidth;
}
}
 
 
if (currWidth == currHeight)
{
newSize.Width = reqWidth;
temp = currHeight * newSize.Width;
newSize.Height = temp / currWidth;
 
 
if (newSize.Height > reqHeight)
{
newSize.Height = reqHeight;
temp = currWidth * newSize.Height;
newSize.Width = temp / currHeight;
}
}
}
 
 
else
{
newSize = currSize;
}
 
 
return newSize;
}
 
 
private bool getGifOrJpg(System.Web.UI.WebControls.FileUpload fle)
{
 
 
if (!fle.PostedFile.FileName.Trim().Equals(""))
{
 
 
string type = fle.PostedFile.ContentType;
 
 
if (type == "image/pjpeg" || type == "image/gif" || type == "image/jpeg")
{
 
 
return true;
}
 
 
else
{
 
 
return false;
}
}
 
 
else
{
 
 
return true;
}
}
 
 
private bool validateFileSize(System.Web.UI.WebControls.FileUpload file, int size)
{
 
 
if (file.PostedFile.ContentLength <= size)
{
 
 
return true;
}
 
 
else
{
 
 
return false;
}
}
 
 
private bool validateFileSizePath(HttpPostedFile file, int size)
{
 
 
if (file.ContentLength <= size)
{
 
 
return true;
}
 
 
else
{
 
 
return false;
}
}
 
 
public bool validwidth(System.Web.UI.WebControls.FileUpload file, int wdt, int hgt)
{
System.Drawing.
 
Image objimage = System.Drawing.Image.FromStream(file.PostedFile.InputStream);
 
 
if ((objimage.Width == wdt) && (objimage.Height == hgt))
{
 
 
return true;
}
 
 
else
{
 
 
return false;
}
}
 
 
public bool validdimension(HttpPostedFile file, int wdt, int hgt)
{
System.Drawing.
 
Image objimage = System.Drawing.Image.FromStream(file.InputStream);
 
 
if ((objimage.Width == wdt) && (objimage.Height == hgt))
{
 
 
return true;
}
 
 
else
{
 
 
return false;
}
}
}
}