you can writer a sql language :
select * from tablename where sqlwhere = name or employ= name or companyname=name.
you can use datasource rutrun the reslut.
SqlConnection con = new SqlConnection("linkingQurey");
SqlComand com =new SqlCommand("ComandQuery",con);
DataSet ds = new DataSet();
DataApdater da = new(com);
da.Fill(ds,tablename);
DataGrid.DataSource=ds;
DataGrid.Meber=tablename;
DataGrid.DataBind();
you can trying.