Just create a NVARCHAR field on sql server and pass the path through as a string.
using (SqlConnection con = new SqlConnection(strConnect))
{
con.Open();
using (SqlCommand com = new SqlCommand("INSERT INTO myTable (imagePath) VALUES (@IM)", con))
{
com.Parameters.AddWithValue("@IM", @"C:\My Images\the name of the image.jpg");
com.ExecuteNonQuery();
}
}