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Suppose I have a text "MaxGroßenIsHere". CurrentCulture is set to "de-DE" in my app. German has the character ß, which can often be written as ss, especially in computers. Therefore, "MaxGroßenIsHere".IndexOf("grossen", idx, StringComparison.CurrentCultureIgnoreCase) returns 3, which is correct.
Now I would like to highlight the text found in my app in color. Unfortunately, I only know the length of the text I am looking for, but not the length of the found text. That's why the I in "MaxGroßenIsHere" is also highlighted and the search for any further text starts with "sHere" instead of "IsHere".
It is a UWP app.
How can I determine the length of the text found?
OK, it works, but I have to create new substrings because String.Compare() has no parameters for two different string lengths.
// Before calling 'GetLengthOfFoundText()', for example, it must be ensured with 'String.IndexOf()',
// that 'searchText' is contained in 'foundText'.
internal static int GetLengthOfFoundText(string foundText, int posInFoundText, string searchText, StringComparison comparison)
{
if (String.IsNullOrEmpty(foundText) || posInFoundText < 0 || posInFoundText >= foundText.Length || String.IsNullOrEmpty(searchText))
return 0;
if (
#if !NETFX_CORE // UWP doesn't know 'Invariant'.
comparison == StringComparison.InvariantCulture || comparison == StringComparison.InvariantCultureIgnoreCase ||
#endif
comparison == StringComparison.Ordinal || comparison == StringComparison.OrdinalIgnoreCase)
return searchText.Length;
string part;
for (int len = 1; posInFoundText + len <= foundText.Length; ++len)
{
part = foundText.Substring(posInFoundText, len);
// if (String.Compare(part, 0, searchText, 0, Math.Max(part.Length, searchText.Length), comparison) == 0)
if (String.Compare(part, searchText, comparison) == 0)
return len;
}
return 0;
}
Thank you!
If no better solutions, maybe you can use the result of IndexOf to extract various candidates, such as “G”, “Gr, “Gro, “Groß”, etc., until you find a match. You can use String.Compare(candicate, "grossen", StringComparison.CurrentCultureIgnoreCase). Then use the length of candidate.