I tried but image path is not coming correctly

    protected void Bind_GV()
    {        
        cmd = new SqlCommand("Get_Employees", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@DeptNo", DeptNo);
        dt = new DataTable();

        try
        {
            con.Open();
            da = new SqlDataAdapter(cmd);
            da.Fill(dt);
            if (dt.Rows.Count > 0)
            {
                GV.DataSource = dt;
                GV.DataBind();
            }
            else
            {
                DataRow dr = dt.NewRow();

                dt.Rows.Add(dr);
                dt.AcceptChanges();
                GV.DataSource = dt;
                GV.DataBind();
                GV.Rows[0].Visible = false;
            }
            if (num == 0)
            {
                int n = dt.Rows.Count;
                for (int i = 0; i < n; i++)
                {
                    //fetch image from DataBase 
                    string file = dt.Rows[i][7].ToString();
                    //give specific path of the image
                    string path = "Image/" + file;
                    //find image control from Gridview
                    Image img = (Image)GV.Rows[i].FindControl("img");
                    // assign path to image
                    img.ImageUrl = path;
                }
                num = 1;
            }
        }
        catch (Exception ex)
        {

        }
        finally
        {
            con.Close();
            con.Dispose();
        }
    }

string folderPath=Server.MapPath("digital/" + imgname);
folderPath = folderPath.Substring(folderPath.LastIndexOf("\\"));