User-1290360778 posted
Hi, I am new to C# and am trying to get my head around it. I found a source demo for uploading images and resizing them but it used the getThumbNail ... which made the resized jpg dithered/grainy.
I have since tried your function but get:
Compiler Error Message: CS1502: The best overloaded method match for 'ImageUpload.ResizePicture(string, string, System.Drawing.Size)' has some invalid arguments
Source Error:
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Line 39: int iheight = 480;
Line 40: //run vcsjones resize function
Line 41: ResizePicture(imageUrl,imageUrl,640);
Line 42:
Line 43: }
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Source File: e:\websites\test\BuoyRacer\ImageUpload.aspx.cs
Line: 41
Show Detailed Compiler Output:
E:\Microsoft Visual Studio 8\Common7\IDE> "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\csc.exe" /t:library /utf8output /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Configuration\2.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll" /R:"C:\WINDOWS\assembly\GAC_32\System.Web\2.0.0.0__b03f5f7f11d50a3a\System.Web.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System\2.0.0.0__b77a5c561934e089\System.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Drawing\2.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Web.Services\2.0.0.0__b03f5f7f11d50a3a\System.Web.Services.dll" /R:"C:\WINDOWS\assembly\GAC_32\System.EnterpriseServices\2.0.0.0__b03f5f7f11d50a3a\System.EnterpriseServices.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Xml\2.0.0.0__b77a5c561934e089\System.Xml.dll" /R:"C:\WINDOWS\assembly\GAC_32\System.Data\2.0.0.0__b77a5c561934e089\System.Data.dll" /R:"C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorlib.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Web.Mobile\2.0.0.0__b03f5f7f11d50a3a\System.Web.Mobile.dll" /out:"C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\buoyracer\7a2e8cbc\9c8582e9\App_Web_imageupload.aspx.cdcab7d2.eikbwwtw.dll" /debug- /optimize+ /w:4 /nowarn:1659;1699 "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\buoyracer\7a2e8cbc\9c8582e9\App_Web_imageupload.aspx.cdcab7d2.eikbwwtw.0.cs" "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\buoyracer\7a2e8cbc\9c8582e9\App_Web_imageupload.aspx.cdcab7d2.eikbwwtw.1.cs" "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\buoyracer\7a2e8cbc\9c8582e9\App_Web_imageupload.aspx.cdcab7d2.eikbwwtw.2.cs"
Microsoft (R) Visual C# 2005 Compiler version 8.00.50727.42
for Microsoft (R) Windows (R) 2005 Framework version 2.0.50727
Copyright (C) Microsoft Corporation 2001-2005. All rights reserved.
e:\websites\test\BuoyRacer\ImageUpload.aspx.cs(41,13): error CS1502: The best overloaded method match for 'ImageUpload.ResizePicture(string, string, System.Drawing.Size)' has some invalid arguments
e:\websites\test\BuoyRacer\ImageUpload.aspx.cs(41,45): error CS1503: Argument '3': cannot convert from 'int' to 'System.Drawing.Size'
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Here is my entire cs file in vs2005 Can anyone tell me where I am going wrong:
using System;
using System.Data;
using System.Drawing.Imaging;
using System.Drawing;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial
class ImageUpload : System.Web.UI.Page
{
public void UploadBtn_Click(Object sender,
EventArgs e)
{
String UploadedFile = MyFile.PostedFile.FileName;
int ExtractPos = UploadedFile.LastIndexOf("\\") + 1;
//to retrieve only Filename from the complete path
String UploadedFileName = UploadedFile.Substring(ExtractPos,UploadedFile.Length - ExtractPos);
// Display information about posted file. Div is invisible by default
FileName.InnerHtml = UploadedFileName;
MyContentType.InnerHtml = MyFile.PostedFile.ContentType;
ContentLength.InnerHtml = MyFile.PostedFile.ContentLength.ToString();
FileDetails.Visible = true;
//div is made visible
// Save uploaded file to server at the in the Pics folder
MyFile.PostedFile.SaveAs(Request.PhysicalApplicationPath +
"pics\\" + UploadedFileName );
System.Drawing.Image oImg = System.Drawing.Image.FromFile(Request.PhysicalApplicationPath +
"pics\\" + UploadedFileName );
//resize creation starts
try
{
String imageUrl= UploadedFileName;
imageUrl = "pics/" + imageUrl;
System.Drawing.Image fullSizeImg = System.Drawing.Image.FromFile(Server.MapPath(imageUrl));
int iwidth = 640;
int iheight = 480;
//run vcsjones resize function
ResizePicture(imageUrl,imageUrl,640);
}
catch(Exception ex){
Response.Write("An error occurred - " + ex.ToString());}
}
//vcsjones resize function
public void ResizePicture(string originalpath,
string newpath,
Size newsize)
{
using (Bitmap newbmp =
new Bitmap(newsize.Width, newsize.Height), oldbmp =
Bitmap.FromFile(originalpath)
as Bitmap)
{
using (Graphics newgraphics =
Graphics.FromImage(newbmp))
{
newgraphics.Clear(Color.FromArgb(-1));
if ((float)oldbmp.Width / (float)newsize.Width == (float)oldbmp.Height
/ (float)newsize.Height)
//Target size has a 1:1 aspect ratio
{
newgraphics.DrawImage(oldbmp, 0, 0, newsize.Width, newsize.Height);
}
else if ((float)oldbmp.Width / (float)newsize.Width
> (float)oldbmp.Height / (float)newsize.Height)
//There will be white space on the top and bottom
{
newgraphics.DrawImage(oldbmp, 0f, (float)newbmp.Height / 2f - (oldbmp.Height * ((float)newbmp.Width / (float)oldbmp.Width))
/ 2f, (float)newbmp.Width, oldbmp.Height * ((float)newbmp.Width / (float)oldbmp.Width));
}
else if ((float)oldbmp.Width / (float)newsize.Width
< (float)oldbmp.Height / (float)newsize.Height)
//There will be white space on the sides
{
newgraphics.DrawImage(oldbmp, (float)newbmp.Width / 2f - (oldbmp.Width * ((float)newbmp.Height / (float)oldbmp.Height))
/ 2f, 0f, oldbmp.Width * ((float)newbmp.Height / (float)oldbmp.Height), (float)newbmp.Height);
}
newgraphics.Save();
newbmp.Save(newpath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
}
}
Resizing Images When Uploaded
