无效的 URI：无法确定 URI 的格式

Question

I keep getting this error.

Invalid URI: The format of the URI could not be determined.

the code I have is:

Uri uri = new Uri(slct.Text);
if (DeleteFileOnServer(uri))
{
    nn.BalloonTipText = slct.Text + " has been deleted.";
    nn.ShowBalloonTip(30);
}

Update: the content in slct.Text is ftp.jt-software.net/style.css .

What gives? How is that not a valid URI format? It's plain text.

Answer 1

It may help to use a different constructor for Uri.

If you have the server name

string server = "http://www.myserver.com";

and have a relative Uri path to append to it, eg

string relativePath = "sites/files/images/picture.png"

When creating a Uri from these two I get the "format could not be determined" exception unless I use the constructor with the UriKind argument, ie

// this works, because the protocol is included in the string
Uri serverUri = new Uri(server);

// needs UriKind arg, or UriFormatException is thrown
Uri relativeUri = new Uri(relativePath, UriKind.Relative); 

// Uri(Uri, Uri) is the preferred constructor in this case
Uri fullUri = new Uri(serverUri, relativeUri);

Answer 2

Check possible reasons here:http://msdn.microsoft.com/en-us/library/z6c2z492(v=VS.100).aspx

EDIT:

You need to put the protocol prefix in front the address, ie in your case "ftp://"

Answer 3

Sounds like it might be a realative uri. I ran into this problem when doing cross-browser Silverlight; on my blog I mentioned a workaround: pass a "context" uri as the first parameter.

If the uri is realtive, the context uri is used to create a full uri. If the uri is absolute, then the context uri is ignored.

EDIT: You need a "scheme" in the uri, eg, "ftp://" or "http://"

Answer 4

Better use Uri.IsWellFormedUriString(string uriString, UriKind uriKind) . http://msdn.microsoft.com/en-us/library/system.uri.iswellformeduristring.aspx

Example :-

 if(Uri.IsWellFormedUriString(slct.Text,UriKind.Absolute))
 {
        Uri uri = new Uri(slct.Text);
        if (DeleteFileOnServer(uri))
        {
          nn.BalloonTipText = slct.Text + " has been deleted.";
          nn.ShowBalloonTip(30);
        }
 }

Answer 5

I worked around this by using UriBuilder instead.

UriBuilder builder = new UriBuilder(slct.Text);

if (DeleteFileOnServer(builder.Uri))
{
   ...
}

Answer 6

The issue for me was that when i got some domain name, i had:

cloudsearch-..-..-xxx.aws.cloudsearch... [WRONG]

http://cloudsearch-..-..-xxx.aws.cloudsearch ... [RIGHT]

hope this does the job for you :)

Answer 7

I was getting a debugging error like this while trying to set up Docker.

I've set the docker setting in "launchSettings.json" as follows.

Problem has solved.

"Docker":
{
    "commandName": "Docker",
    "launchBrowser": true,
    "launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}/",
    "publishAllPorts": false,
    "useSSL": true
}

Answer 8

如果您为应用程序启用了 SwaggerDoc，请检查 xml 注释文件是否存在。