Image control

[luci]

Hi,
i'm writing a pice of code to fill the image control (in asp.net page)
with a image uploaded on the server.
The way I used is this:
protected void cmdUpload_Click(object sender, EventArgs e)
{
thumbUpload.SaveAs(Server.MapPath("/public/news/_tmp_news.jpg"));
System.Drawing.Image largeImg =
System.Drawing.Image.FromFile(Server.MapPath("/public/news/_tmp_news.jpg"));
System.Drawing.Image thumbImg =
largeImg.GetThumbnailImage(120, 120, null, IntPtr.Zero);
largeImg.Dispose();

thumbImg.Save(Server.MapPath("/public/news/_tmp_news.jpg")); //Resave
the thumb
thumbImg.Dispose();
imgThumb.ImageUrl = "/public/news/_tmp_news.jpg";

....................

Why when i try to upload again a new image the images don't change?

The image control always show the first image i uploaded, (in cache?)

DUNNO!

[bruce barker \(sqlwork.com\)]

thats because the browser caches images. the easiest fix is decorate the
url:

myimage.jpg?i=<random number>

-- bruce (sqlwork.com)

<luci> wrote in message
news:44***********************@reader3.news.tin.it ...

Hi,
i'm writing a pice of code to fill the image control (in asp.net page)
with a image uploaded on the server.
The way I used is this:
protected void cmdUpload_Click(object sender, EventArgs e)
{
thumbUpload.SaveAs(Server.MapPath("/public/news/_tmp_news.jpg"));
System.Drawing.Image largeImg =
System.Drawing.Image.FromFile(Server.MapPath("/public/news/_tmp_news.jpg"));
System.Drawing.Image thumbImg =
largeImg.GetThumbnailImage(120, 120, null, IntPtr.Zero);
largeImg.Dispose();

thumbImg.Save(Server.MapPath("/public/news/_tmp_news.jpg")); //Resave the
thumb
thumbImg.Dispose();
imgThumb.ImageUrl = "/public/news/_tmp_news.jpg";

...................

Why when i try to upload again a new image the images don't change?

The image control always show the first image i uploaded, (in cache?)

DUNNO!

[luci]

bruce barker (sqlwork.com) ha scritto:

thats because the browser caches images. the easiest fix is decorate the
url:

myimage.jpg?i=<random number>

-- bruce (sqlwork.com)

<luci> wrote in message
news:44***********************@reader3.news.tin.it ...

Hi,
i'm writing a pice of code to fill the image control (in asp.net page)
with a image uploaded on the server.
The way I used is this:
protected void cmdUpload_Click(object sender, EventArgs e)
{
thumbUpload.SaveAs(Server.MapPath("/public/news/_tmp_news.jpg"));
System.Drawing.Image largeImg =
System.Drawing.Image.FromFile(Server.MapPath("/public/news/_tmp_news.jpg"));
System.Drawing.Image thumbImg =
largeImg.GetThumbnailImage(120, 120, null, IntPtr.Zero);
largeImg.Dispose();

thumbImg.Save(Server.MapPath("/public/news/_tmp_news.jpg")); //Resave the
thumb
thumbImg.Dispose();
imgThumb.ImageUrl = "/public/news/_tmp_news.jpg";

...................

Why when i try to upload again a new image the images don't change?

The image control always show the first image i uploaded, (in cache?)

DUNNO!

I Supposed!
There's a method to clear the cache? just to know!