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You can use the IndexOf method and the Substring method like so: string output = input. Substring(input. IndexOf('.
trim() . trim() removes spaces before the first character (which isn't a whitespace, such as letters, numbers etc.) of a string (leading spaces) and also removes spaces after the last character (trailing spaces).
You can extract a substring from a string before a specific character using the rpartition() method. rpartition() method partitions the given string based on the last occurrence of the delimiter and it generates tuples that contain three elements where.
.Net Fiddle example
class Program
{
static void Main(string[] args)
{
Console.WriteLine("223232-1.jpg".GetUntilOrEmpty());
Console.WriteLine("443-2.jpg".GetUntilOrEmpty());
Console.WriteLine("34443553-5.jpg".GetUntilOrEmpty());
Console.ReadKey();
}
}
static class Helper
{
public static string GetUntilOrEmpty(this string text, string stopAt = "-")
{
if (!String.IsNullOrWhiteSpace(text))
{
int charLocation = text.IndexOf(stopAt, StringComparison.Ordinal);
if (charLocation > 0)
{
return text.Substring(0, charLocation);
}
}
return String.Empty;
}
}
Results:
223232
443
34443553
344
34
Use the split function.
static void Main(string[] args)
{
string s = "223232-1.jpg";
Console.WriteLine(s.Split('-')[0]);
s = "443-2.jpg";
Console.WriteLine(s.Split('-')[0]);
s = "34443553-5.jpg";
Console.WriteLine(s.Split('-')[0]);
Console.ReadKey();
}
If your string doesn't have a - then you'll get the whole string.
String str = "223232-1.jpg"
int index = str.IndexOf('-');
if(index > 0) {
return str.Substring(0, index)
}
Things have moved on a bit since this thread started.
Now, you could use
string.Concat(s.TakeWhile((c) => c != '-'));
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