How to Create a Download Update Form?

Hello,

I want to know how to use the System.Net.WebClient in my application. Here is the part of the code:

System.Net.WebClient client = new System.Net.WebClient();

client.DownloadFile("http://updates.com/index.xml","c:\\update.xml");

That would download the file "index.xml" and save it in the local computer in drive C under a new name "update.xml". I would like my application to determine the file size of the file to be downloaded. I would like to make a progress bar showing the percent downloaded in the file in relation to its file size. Then after, when the download finishes, a MessageBox will appear stating that the download is completed.

Even if the progress bar is not included, that would suffice. What I would like to have is that when the file was downloaded in local machine of the user, a messagebox will appear stating that the downloading of updates is finish.

Hope you can help me in here.

Thanks and more power!

Ichi

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How to Create a Download Update Form?

Eirian
I have 1.1, 2.0 and 3.0 on my machine. .Net framework is designed to be work side-by-side among multiple versions. Are you using VS 2003 or VS 2005 By default VS 2003 uses 1.1, 2005 uses 2.0
Al Harlow
All the codes works fine except the function

void wc_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{

long rec = e.BytesReceived; //received bytes so far

long percent = e.ProgressPercentage; //progress percentage

long total = e.TotalBytesToReceive; // total bytes

}

C# generated an error.

Error 1 The type or namespace name 'DownloadProgressChangedEventArgs' could not be found (are you missing a using directive or an assembly reference ) C:\Documents and Settings\Ichi Ban\Local Settings\Application Data\Temporary Projects\DownloadUpdate\Form1.cs 30 56 DownloadUpdate

What would be the possible cause Its quite unclear for me.

Thanks and more power!

Ichi
IMBack
I have fixed it already. =D

I just don't understand but I just tried a couple of changes.

OLD:

wc.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wc_DownloadProgressChanged);

NEW:

wc.DownloadProgressChanged += new System.Net.DownloadProgressChangedEventHandler(wc_DownloadProgressChanged);

Same goes to the function below.

void wc_DownloadProgressChanged(object sender, System.Net.DownloadProgressChangedEventArgs e)
{
...
}

Yet, I do not know the explanation. But I'm trying to check as to why is it. =D

Do you have any idea about this
Programm3r
Are you using .Net 1.0 or 1.1 I believe this is only introuduced since 2.0
SP534

oh, you can put a using System.Net on top of your code then you don't need this System.net stuff in your code anymore.
Amde
Be aware that your ASP.Net user may don't have write access to C:\
WXS123
I have found that currently, there is 2 .net framework in my computer

I saw it in the control panel in the add, remove program.

There it is:
-Microsoft .NET Framework 1.1
-Microsoft .NET Framework 2.0

Is that a big problem

Ichi
Aazad

Use asychornized download and it gives you everything you need.

WebClient wc = new WebClient();

....

wc.DownloadFileCompleted+=new AsyncCompletedEventHandler(wc_DownloadFileCompleted);

wc.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wc_DownloadProgressChanged);

wc.DownloadFileAsync(new Uri("http://updates.com/index.xml"), "c:\\index.html");

....

void wc_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)

{

long rec = e.BytesReceived; //received bytes so far

long percent = e.ProgressPercentage; //progress percentage

long total = e.TotalBytesToReceive; // total bytes

}

...

void wc_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)

{

MessageBox.Show("Done");

}
How to Create a Download Update Form?

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