我如何打开多个URL以在C＃中读取

Question

Here's what I got so far:

string[] urls = new string[2];
urls[1] = "https://exampletext.com/example1";
urls[2] = "https://exampletext.com/example2";

Console.WriteLine("\nSearching url...\n");
int count=1;
while (count < 3)
{
    var url = urls[count];
    var client = new WebClient();
    using (var stream = client.OpenRead(url))
        using (var reader = new StreamReader(stream))
        {
            string linetext;

            while ((linetext = reader.ReadLine()) != null)
            {
                 Console.WriteLine(linetext);
            }

        }
    count++;
}

How do I make it so that I cycle to those two(or potentially more) urls? I was thinking doing using (string[] urls = new string[2]){...} but I'm not sure if that'd work. I'm very new to VS and c#, so please excuse my ignorance.

Answer 1

Your array goes from 0 to 1, but you're looping from 1 to 2. (I'm surprised you're even able to set urls[2] to a value without an exception.)

Semantically it would probably make more sense if you just use a foreach loop:

foreach (var url in urls)
{
    // your logic
}

Answer 2

Use parallel foreach which will access all multiple urls

https://msdn.microsoft.com/en-us/library/dd460720(v=vs.110).aspx

Answer 3

• Use a for loop, or a foreach loop.
• All Indexes start at 0.

code:

string[] urls = new string[2];
urls[0] = "https://exampletext.com/example1";
urls[1] = "https://exampletext.com/example2";

Console.WriteLine("\nSearching url...\n");
for(int count = 0; count < urls.Length; count++)
{
    var url = urls[count];
    var client = new WebClient();
    using (var stream = client.OpenRead(url))
        using (var reader = new StreamReader(stream))
        {
            string linetext;

            while ((linetext = reader.ReadLine()) != null)
            {
                 Console.WriteLine(linetext);
            }

        }
}

Answer 4

Array in c# start with 0 index, you are initializing it with 1 you missed zero.

alternatively you can try something like:

foreach(string url in new String[] {"https://exampletext.com/example1", "https://exampletext.com/example2", "https://exampletext.com/example3"}) 
{
   // read url here
}