File in local server,Search ,Retrive based on search,C# ,WinForm

Hi
How can we search a string in excel file saved in local server and how can we retrieve other values based on that cell
Example
Excel file contains
Emp_No Name Age
1 Raja 22
2 t 21
3 Vintoh 32


If i search emp_No for 1 the corresponding fields should be displayed in label in c#

2.How can i list available local ip's [internet connected to that server] to a combobox


Regards