无法将字符串从列表拆分为两部分

Question

I'm trying to create an configuration file for my server program. I'm reading it line by line and when encounter desired option I'm processing that line. I have to extract IP written to file, but Visual Studio won't let me. Here is code of process method:

////I'm assuming that file is loading is good...
private int processIp()
{
        String tempIpAddr = "";

        Console.Write("IP");
        for (int i = 0; i < readLines.Count; i++)
        {
            if (readLines[i].Contains("IP"))
            {
                if(readLines[i].Contains(":"))
                {
                    tempIpAddr = readLines.ElementAt(i).Split(':');
                }
            }
        }
        return 0;
 }

I'm getting that error:Error 4 Cannot implicitly convert type 'string[]' to 'string' F:\\DB\\Dropbox\\Repozytoria\\ARDSQL GUI\\Sources\\Configuration.cs 85 38 ARDSQL GUI

I tried changing tempIpAddr to array and changing this readLines.ElementAt(i).Split(':'); to this tempIpAddr = readLines[i].Split(':');

How to make it work?

Answer 1

The result of String.Split() is a string array string[] .

Adjust your declaration to look like this:

String[] tempIpAddr;

Answer 2

string.Split() returns an array of strings, and you are trying to assign that to a string variable , which won't work.

If you know that the IP address is always the string segment following the very first ':' on the line, and that there will be nothing following the IP address, you could modify your code thus:

tempIpAddr = readLines.ElementAt(i).Split(':')[1]

But trusting your client is a sure-fire way to fail. And I would at least do a Trim() after the Split().

(There are a few other problems in your code, but you may already be aware of them: ie you aren't returning the temp IP address or doing anything else with it.)