. Net upload image size thumbnail

Public String getsqlfile (fileupload FP, int width, int height)
{
String sqlfile = "";
String tempsqlpath = "";
String Path = httpcontext. Current. Request. physicalapplicationpath. tostring () + "upload /";
Path + = "uploadfile/" + datetime. Now. tostring ("yyyymm ");
Tempsqlpath = "\ upload \ uploadfile \" + datetime. Now. tostring ("yyyymm ");
If (directory. exists (PATH ))
{

}
Else
{
Directory. createdirectory (PATH );
}
If (directory. exists (path + "/small "))
{
}
Else
{
Directory. createdirectory (path + "/small ");
}
If (directory. exists (path + "/Temp "))
{
}
Else
{
Directory. createdirectory (path + "/Temp ");
}
// Httpfilecollection files = httpcontext. Current. Request. files;

If (FP. filename. tostring (). length> 0)
{
String filename = FP. filename. tostring ();
String datestr = datetime. Now. tostring ("yyyymmddhmmssfff ");
String ext = filename. substring (filename. lastindexof ("."). tolower ();
If (EXT! = ". BMP" & ext! = ". Jpg" & ext! = ". GIF" & ext! = ". Jpeg ")
{
Httpcontext. Current. response. Write ("<SCRIPT> alert('file uploaded is not in. GIF, JPG, JPEG, BMP format ') </SCRIPT> ");
Return "";
}
String tempfilepath = path + "/" + "Temp/" + datestr + ext;
FP. saveas (tempfilepath );
# Region generate a thumbnail
String originalfilename = path + "/" + datestr + ext;
// FP. filebytes
// Multiples of the zoom-out
Int iscale = 1;
// Obtain an image object from a file
System. Drawing. Image image = NULL;
Try
{
Image = system. Drawing. image. fromfile (tempfilepath );

}
Catch
{
//
Try
{
File. Delete (tempfilepath );
Image. Dispose ();

}
Catch
{
}
Httpcontext. Current. response. Write ("<SCRIPT> alert('file uploaded is not in the standard format of .gif, JPG, JPEG, and BMP ') </SCRIPT> ");
Return "";

}
Int HI = 0;
Int Wi = 0;
Wi = width;
Hi = height;
Size size = new size (WI, hi );
// Create a BMP Image
System. Drawing. Image bitmap = new Bitmap (size. Width, size. Height );
// Create a canvas
Graphics G = graphics. fromimage (Bitmap );
// Set a high quality Interpolation Method
G. interpolationmode = interpolationmode. High;
// Set high quality and smooth Low Speed
G. smoothingmode = smoothingmode. highquality;
// Clear the canvas
G. Clear (color. Blue );
// Draw a picture at a specified position
G. drawimage (image, new rectangle (0, 0, bitmap. width, bitmap. height), new rectangle (0, 0, image. width, image. height), graphicsunit. pixel );
If (EXT = ". jpg" | ext = ". jpeg ")
Bitmap. Save (path + "/small/" + datestr + Ext, imageformat. JPEG );
If (EXT = ". GIF ")
Bitmap. Save (path + "/small/" + datestr + Ext, imageformat. GIF );
If (EXT = ". BMP ")
Bitmap. Save (path + "/small/" + datestr + Ext, imageformat. BMP );
/// Large image
If (FP. filebytes. Length & gt; 300000 ){
// Image. Width
// Image. Height

Wi = 800;

Hi = convert. toint32 (image. Height * (convert. todouble (WI)/convert. todouble (image. width )));
Size = new size (WI, hi );
// Create a BMP Image
Bitmap = new Bitmap (size. Width, size. Height );
// Create a canvas
G = graphics. fromimage (Bitmap );
// Set a high quality Interpolation Method
G. interpolationmode = interpolationmode. High;
// Set high quality and smooth Low Speed
G. smoothingmode = smoothingmode. highquality;
// Clear the canvas
G. Clear (color. Blue );
// Draw a picture at a specified position
G. drawimage (image, new rectangle (0, 0, bitmap. width, bitmap. height), new rectangle (0, 0, image. width, image. height), graphicsunit. pixel );
If (EXT = ". jpg" | ext = ". jpeg ")
Bitmap. Save (originalfilename, imageformat. JPEG );
If (EXT = ". GIF ")
Bitmap. Save (originalfilename, imageformat. GIF );
If (EXT = ". BMP ")
Bitmap. Save (originalfilename, imageformat. BMP );

}< br> else {
FP. saveas (originalfilename);
}< br> image. dispose ();
bitmap. dispose ();
G. dispose ();
# endregion
sqlfile = datestr + ext;

Try
{
Image. Dispose ();
Bitmap. Dispose ();
G. Dispose ();
File. Delete (tempfilepath );
}
Catch (exception ex)
{
String exc = ex. Message. tostring ();
Httpcontext. Current. response. Write ("<SCRIPT> alert ('" + exc + "'); </SCRIPT> ");
}
}
Else
{
Sqlfile = "";
}
Sqlfile = sqlfile. length> 0? (Tempsqlpath + "\" + sqlfile ):("");
Return sqlfile;
}