How to extract a string from text ?

Question

int index2 = downloadLinks[i].IndexOf("S_");  
string result = downloadLinks[i].Substring(index2 + 2);  
  

Example of a string in downloadLinks :

https://ims.gov.il/sites/default/files/ims_data/map_images/IMSRadar4GIS/IMSRadar4GIS_202301062325_0.png

and from each link i want to get only the number : 202301062325

so far in the variable result i can get : 202301062325_0.png but i don't want the last part _0.png and not sure how to remove that in the substring line.

Answer 1

Check an example:

string link = "https://ims.gov.il/sites/default/files/ims_data/map_images/IMSRadar4GIS/IMSRadar4GIS_202301062325_0.png";  
string result = Regex.Match( Path.GetFileNameWithoutExtension( link ), @"_(\d+)_\d+$" ).Groups[1].Value;  
// result is "202301062325"