错误“不支持URI格式” - 如何从Web上提取图像

时间:2013-06-21 15:27:58

标签: c# .net url uri getfiles

我最近写了一段这样的代码:

protected void OpenImg_Click(object sender, EventArgs e)
            {
                int i = 0;

                string PathToFolder = "C://LiveSite/img/XL/";

                var dirInfo = new DirectoryInfo(PathToFolder);
                string FileName = Variables.param + "XL.jpg";
                var foundFiles = dirInfo.GetFiles(FileName);

                if (foundFiles.Length == 1)
                {
                    ClientScript.RegisterStartupScript(this.GetType(), "openFoundImage", "window.open('" + PathToFolder + foundFiles[i].Name + "');", true);
                }
            }
        }
   }

它正确地进行了修改,但它没有用,因为它正在关闭c://驱动器,所以我将图像的位置更改为:http://www.companysite.com/img/XL/。当我用string PathToFolder = "C://LiveSite/img/XL/";替换http://www.companysite.com/img/XL/时,我收到错误“不支持URI格式”

然后我将代码更改为:

 protected void OpenImg_Click(object sender, EventArgs e)
                {
                    int i = 0;

                    string uriPath = "http://www.companysite.com/img/XL/";

                    string  localPath = new Uri(uriPath).LocalPath;
                    string FileName = Variables.param + "XL.jpg";
                    var foundFiles = localPath.GetFiles(FileName); //ERROR

                    if (foundFiles.Length == 1)
                    {
                        ClientScript.RegisterStartupScript(this.GetType(), "openFoundImage", "window.open('" + uriPath + foundFiles[i].Name + "');", true);
                    }
                }
            }
        }

现在我收到使用.GetFiles的错误 - 我想用什么而不是GetFiles?并且我的代码是否正确从网络上提取图像?任何帮助将不胜感激。

3 个答案:

答案 0 :(得分:2)

您需要使用webclient类http://msdn.microsoft.com/en-us/library/system.net.webclient.aspx

这可以帮助你:

using System;
using System.Net;
using Myapp.Properties;

namespace MyApp
{
    public class Test
    {
        static void Main(string[] args)
        {
        string website ="http://www.fryan0911.com/webclientsample.zip";
        string downloadfolder = Settings.Default.DownloadFolder;

        try
            {
            WebClient wc = new WebClient();
            wc.DownloadFile(website, downloadfolder);
            Console.WriteLine("Web file has been downloaded to " + downloadfolder);
            }
        catch (WebException e)
        {
            Console.WriteLine(e.Message);
        }
        Console.ReadKey();
    }
}
}

代码来自:

http://www.fryan0911.com/2009/03/c-download-file-from-website-using-web.html

答案 1 :(得分:0)

看起来你在自己的服务器上使用文件,然后你可以从codebehind / controller中抓取它们。

        var serverRootPath = Server.MapPath("~");
        var files = Path.Combine(serverRootPath,"img");
        var images = Directory.GetFiles(files);

答案 2 :(得分:0)

我遇到了同样的问题。

string app_path = System.Reflection.Assembly.GetExecutingAssembly().CodeBase;
string folderpath = Path.GetDirectoryName(app_path);// Error Here

我注意到它为我提供了程序集的文件路径,但是使用" file:///"在字符串的开头。

所以我这样做了:

string app_path = System.Reflection.Assembly.GetExecutingAssembly().CodeBase.Replace(@"file:///", "");

希望这有帮助。