分裂; 然后在=上，使用String.Split遇到问题，需要使用正则表达式

Question

"key1"="value1 http://www.example.com?a=1";"key2"="value2 http://www.example.com?a=2";

I need to split the above line 2 times, the first time it is the comma character ; and the second time on the = sign.

It doesn't work correctly because the value part has the = sign in it also.

My code doesn't work as it was assuming the value part doesnt' have an = sign in it, and it isn't using regex simply String.Split('=').

Can someone help with the regex required, I added double quotes around both the key/value to help keep things seperate.

Answer 1

I didn't use a regex, but you could do something like the following:

        string test =@"""key1""=""value1 http://www.example.com?a=1"";""key2""=""value2 http://www.example.com?a=2""";

        string[] arr = test.Split(';');

        foreach (string s in arr)
        {
            int index = s.IndexOf('=');
            string key = s.Substring(0, index);

            string value = s.Substring(index+1, s.Length - index);
        }

Answer 2

Use the String.Split(char[], int) overload (http://msdn.microsoft.com/en-us/library/c1bs0eda.aspx). The second parameter will limit the number of substrings to return. If you know your strings will always have at least 1 equal sign (key/value pairs), then set the second parameter to 2.

string x = "key1=value1 http://www.example.com?a=1;key2=value2 http://www.example.com?a=2;";
char[] equal = new char[1] { '=' };
char[] semi = new char[1] { ';' };
string[] list = x.Split(semi, StringSplitOptions.RemoveEmptyEntries);
foreach (string s in list)
{
    string[] kvp = s.Split(equal, 2);
    Console.WriteLine("Key: {0}, Value: {1}", kvp[0], kvp[1]);
}

- Result:

Key: key1, Value: value1 http://www.example.com?a=1
Key: key2, Value: value2 http://www.example.com?a=2

Answer 3

Well what you can do, is you can use IndexOf to get the index of the first =

int i = myStr.IndexOf('=');

and then you can use the String.Substring to get the key and value

string key = myStr.Substring(0, i)

string value = myStr.SubString(i+1);

Here is some documentation on the String Class that you might find useful

Answer 4

You need to match not split the text

var keys= Regex.Matches(yourString,"""(.*?)""=.*?(http.*?)"";").Cast<Match>().Select(x=>
    new
    {
        key=x.Groups[1].Value,
        value=x.Groups[2].Value
    }
);

foreach(key in keys)
{
    key.key;//the key value
    key.value;//the value
}

Answer 5

Your regex should look like this.

"(.+?)"="(.+?)"

Sadly I do not know C# but this should work in every language. To get the results you have to select for every match:

group(1) as keys
group(2) as values

Answer 6

Use String.Split with StringSplitOptions.RemoveEmptyEntries and an array of strings with delimiters

string s = "\"key1\"=\"value1 http://www.example.com?a=1\";\"key2\"=\"value2 http://www.example.com?a=2\"";

string[] result = s.Split(new string[] { "\";\"", "\"=\"", "\"" },
                           StringSplitOptions.RemoveEmptyEntries);

---

result = {string[4]}
    [0]: "key1"
    [1]: "value1 http://www.example.com?a=1"
    [2]: "key2"
    [3]: "value2 http://www.example.com?a=2"

---

I use the following delimiters (including the double quotes):

";"
"="
"

Answer 7

You could also try using the Split method with multiple tokens here this will give you a string[] of multiple values that were split out based on your tokens

if you want to remove empty Entries you could also do the code like this

string strValue = @"""key1""=""value1 http://www.example.com?a=1"";""key2""=""value2 http://www.example.com?a=2""";
string[] strSplit = strValue.Split(new string[] { "\";\"", "\"=\"", "\"" }, StringSplitOptions.RemoveEmptyEntries);

Results

strSplit    {string[4]} string[]
[0] "key1"  
[1] "value1 http://www.example.com?a=1"
[2] "key2"  
[3] "value2 http://www.example.com?a=2"