今天在使用ext.net的UploadField控制元件想上傳檔案時，發現examples.ext.net官網上的例子寫的不是很詳細。於是通過網上找資料，結合asp.net的檔案上傳的方法，終於實現了圖片的上傳功能。以下就是實現的程式碼，供大家參考！

首先在.aspx檔案中插入一個檔案上傳的控制元件：

        <ext:FileUploadField ID="UploadFile" runat="server" FieldLabel="上傳附件"  Width="300" ButtonText="瀏覽..." Icon="Attach" />

然後是.cs檔案中實現上傳的具體程式碼：

/// <summary>
 
    /// 上傳附件    /// </summary>    protected void Upload(object sender, DirectEventArgs e)    {        string UploadFile = "";        if (this.UploadFile.HasFile)        {            UploadFile = this.UploadFile.PostedFile.FileName.ToString();            int FileSize = Int32.Parse(this.UploadFile.PostedFile.ContentLength.ToString());            if
 
 (FileSize > 5 * 1024 * 1024)            {                X.Msg.Alert("提示資訊", "上傳檔案過大！").Show();                return;            }            string strFileName = Path.GetExtension(this.UploadFile.PostedFile.FileName).ToUpper();//獲取檔案字尾                          if (!(strFileName == ".BMP" || strFileName == ".GIF"
 
 || strFileName == ".JPG"))            {                X.Msg.Alert("提示資訊", "檔案格式不正確！").Show();                return;            }            Random ran = new Random();            string sNewName = DateTime.Now.ToString(@"yyyyMMddHHmmss") + ran.Next(100, 999)              + Path.GetExtension(this.UploadFile.PostedFile.FileName);            string strPath = Server.MapPath("~/Uploads/ZmQuo/"+System.DateTime.Now .Year .ToString () +"/"+ sNewName);            if (!Directory.Exists(Path.GetDirectoryName(strPath)))            {                Directory.CreateDirectory(Path.GetDirectoryName(strPath));            }            try            {                this.UploadFile.PostedFile.SaveAs(strPath);                X.Msg.Alert("提示資訊", "檔案上傳成功！").Show();                return;            }            catch(Exception ex)             {                throw ex;             }        }    }