c# webservice 下载

在C# WebService中，可以使用以下代码实现文件下载功能：

namespace web {
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [ToolboxItem(false)]
    public class WebService1 : System.Web.Services.WebService {

        [WebMethod(Description = "下载服务器站点文件，传递文件相对路径")]
        public byte[] DownloadFile(string strFilePath) {
            FileStream fs = null;
            string CurrentUploadFolderPath = Server.MapPath(ConfigurationManager.AppSettings["UploadFileFolder"]);
            string CurrentUploadFilePath = CurrentUploadFolderPath + strFilePath;

            if (File.Exists(CurrentUploadFilePath)) {
                try {
                    fs = File.OpenRead(CurrentUploadFilePath);
                    int b1;
                    System.IO.MemoryStream tempStream = new System.IO.MemoryStream();
                    while ((b1 = fs.ReadByte()) != -1) {
                        tempStream.WriteByte(((byte)b1));
                    }
                    return tempStream.ToArray();
                } catch (Exception ex) {
                    return new byte