get values from string

in my variable:

string selectedObjects;

i have one long value like:

"123;132;213;231;"

i want to get 4 times values as: "123;" , "132;" , "213;" and "231;".

i tryed with foreach as:

public ActionResult ShowHistory(string selectedObjects)
    {
        foreach (string item in selectedObjects)
        {开发者_如何转开发
            item = selectedObjects.Split(';');
        }

but it doesnt work. how can i do that?

The flow is incorrect. Split returnes an array through which you should than iterate, using foreach if that's your choice. So:

foreach (string item in selectedObjects.Split(';'))
{
    // do whatever you want with the items
}

You can use a regular expression:

foreach (Match m in Regex.Matches("123;132;213;231;", @"\d+;"))
    string value = m.Value; //Do something worthwhile with the value.

All of the other answers are wrong or overkill - unless I'm missing something.

public ActionResult ShowHistory(string selectedObjects)
{
    foreach (string tempItem in selectedObjects.Split(new []{';'}, StringSplitOptions.RemoveEmptyEntries))
    {
        string item = tempItem + ";"; // Add back on the ; character
    }
    // .. do something

The RemoveEmptyEntries is required, otherwise, you'll get an empty string at the end (because your input string ends with ";"). Also, string.Split does not preserve the separator char, so you need to add it back in if you want it (hence the tempItem).

Split returns an array of string.

string selectedObjects = ...;

foreach (string item in selectedObjects.Split(';'))
{
   // do work
}

foreach(string item in selectedObjects.Split(new [] {';'}, 
                                             StringSplitOptions.RemoveEmptyEntries)
                                      .Select( x=> x+";"))
{
   //process item
}

Split method returns array of string, try somehting like this

string selectedObjects = "123;132;213;231;";
string[] s = selectedObjects.Split(';');

foreach (string item in s )
{
    Console.Writeline(item.ToString());
}

You need to append the semi-colon again after splitting.

public ActionResult ShowHistory(string selectedObjects)
{
    var items = selectedObjects.Split(';')
                               .Where(i => !string.IsNullOrEmpty(i))
                               .Select(i => i + ";");
    ...
}

Or (if you can guarantee that exact format)

public ActionResult ShowHistory(string selectedObjects)
{
    var items = selectedObjects.TrimEnd(';')
                               .Split(';')
                               .Select(i => i + ";");
    ...
}