How to split a string in C#

Question

I\'m having a string like

\"List_1 fooo asdf List_2 bar fdsa XList_3 fooo bar\"

and a List like

Answer 1

You can use the String.IndexOf method to get the index of the starting character for each phrase in your list.

Then, you can use this index to split the string.

string input = "A foo bar B abc def C opq rst";
List lstValues = new List { "A", "C", "B" };
List indices = new List();

foreach (string s in lstValues)
{
    // find the index of each item
    int idx = input.IndexOf(s);

    // if found, add this index to list
    if (idx >= 0)
       indices.Add(idx);        
}

Once you have all the indices, sort them:

indices.Sort();

And then, use them to get resulting strings:

// obviously, if indices.Length is zero,
// you won't do anything

List results = new List();
if (indices.Count > 0)
{
    // add the length of the string to indices
    // as the "dummy" split position, because we
    // want last split to go till the end
    indices.Add(input.Length + 1);

    // split string between each pair of indices
    for (int i = 0; i < indices.Count-1; i++)
    {
        // get bounding indices
        int idx = indices[i];
        int nextIdx = indices[i+1];

        // split the string
        string partial = input.Substring(idx, nextIdx - idx).Trim();

        // add to results
        results.Add(partial);
    }
}