download image from an url in windows application

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Hi,
I am creating a windows applciation where i have DataTable which contains URLS of file i have to download to a local system.. How can i do it..
I used WebClient and its DownnloadFileAsyn but the file is not being downloaded and no error is there . can any one help

[Pasted on behalf of OP]

C++

foreach (DataRow _drDevice in dtDeviceLoogos.Rows)
{
    using (WebClient Client = new WebClient())
    {
        Client.DownloadFile(_drDevice["LogoPath"].ToString(), 
             "D:\\Logos\\_drDevice[""].ToString());
    }
}

Posted 12-Sep-13 21:56pm

Arjun Menon U.K

Updated 12-Sep-13 23:04pm

nv3

v2

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nv3 13-Sep-13 4:02am

Without showing your code, chances are not very high that anybody will be able to help you on this.

Arjun Menon U.K 13-Sep-13 4:08am

foreach (DataRow _drDevice in dtDeviceLoogos.Rows)
{
using (WebClient Client = new WebClient())
{
Client.DownloadFile(_drDevice["LogoPath"].ToString(), "D:\\Logos\\_drDevice[""].ToString());
}
}

The code above causing an error "An exception occurred during a WebClient request."

Richard MacCutchan 13-Sep-13 4:11am

Then you should catch the exception and print its details. However, looking at your call to the DownLoadFile method, it may well be that your source or target paths are wrong. Use your debugger to see what is happening.

Arjun Menon U.K 13-Sep-13 4:24am

i created a counter and set the counter name as file with extension , then its saving fine.. but i want to save in the original file format

Prasad Khandekar 13-Sep-13 4:14am

Have you checked the value of "D:\\Logos\\_drDevice[""].ToString()" It is creating an invalid local path. It should be a valid local file path & name. e.g. ""D:\\Logos\\" + _drDevice[""].ToString() assuming that _drDevice[""].ToString() gives a valid file name.

Arjun Menon U.K 13-Sep-13 4:33am

The dr value is the url itself...which has the filename+exension
here's the example
https://******/DeviceLogo/****_250_100.gif

Prasad Khandekar 13-Sep-13 5:23am

See, your second argument is going to yield an invalid path. e.g. "D;\\Logos\\https://******/DeviceLogo/****_250_100.gif", it should be something like "D:\\Logos\\***_250_100.gif". Correct the code and exception should go away.

foreach (DataRow _drDevice in dtDeviceLoogos.Rows) {
using (WebClient Client = new WebClient()) {
String logoFilePath = _drDevice[""].ToString();
String logoFile = logoFilePath.Substring(logoFilePath.LastIndexOf("/") + 1);
Client.DownloadFile(_drDevice["LogoPath"].ToString(), "D:\\Logos\\" + logoFile);
}
}

Regards,

Arjun Menon U.K 13-Sep-13 14:20pm

Hi Prasad,
Thanks for the post. I too thought that the thing you said was the reason... Nyways thanks for correcting me.. CHeers bro!

BillWoodruff 13-Sep-13 4:07am

What have you tried so far ?

Arjun Menon U.K 13-Sep-13 4:10am

foreach (DataRow _drDevice in dtDeviceLoogos.Rows)
{
using (WebClient Client = new WebClient())
{
Client.DownloadFile(_drDevice["LogoPath"].ToString(), "D:\\Logos\\_drDevice[""].ToString());
}
}

The code above causing an error "An exception occurred during a WebClient request."

Prasad Khandekar 13-Sep-13 4:10am

You can turn on tracing for your application to get more insight. See http://msdn.microsoft.com/en-us/library/hyb3xww8.aspx

Maciej Los 13-Sep-13 4:21am

What have you tried till now? Where are you stuck?

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The_Inventor · Answer 1 · 2013-09-14T15:54:00

Solution 1

http://msdn.microsoft.com/en-us/library/system.net.webclient.aspx[^]

WebClient* Client = new WebClient();// or do it like in the link.

Posted 14-Sep-13 15:54pm

The_Inventor

Updated 14-Sep-13 15:59pm

v2