圖片上傳

1、.aspx代碼

<table>

    <tr>
                <td class="tdleft" style="width: 125px;">
                    頭像：
                </td>
                <td class="tdright">
                    <asp:Label ID="lbPicName" runat="server"> </asp:Label>
                </td>
            </tr>
            <tr>
                <td class="tdleft" style="width: 125px;">
                    頭像上傳：
                </td>
                <td class="tdright">
                    <input id="fileImages" type="file" name="fileImage" runat="server" size="35" tabindex="2"
                        style="height: 25px;" />
                    <asp:Button ID="UploadImage" Text="上傳" runat="server" OnClick="UploadImage_Click"
                        Width="52px" />
                </td>
            </tr>

</table>

2.cs代碼

    private string ProPicPath = System.Configuration.ConfigurationManager.AppSettings["PicPath"].ToString(); //webconfig配置上傳到服務器地址 物理
    public string ProPicUrl = System.Configuration.ConfigurationManager.AppSettings["PicUrl"].ToString();//取圖片的路徑 虛

 #region 上傳圖片
    /// <summary>
    /// 上傳圖片事件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void UploadImage_Click(object sender, EventArgs e)
    {
        try
        {
            #region 圖片上傳
            if (fileImages.PostedFile.FileName == "")
            {
                RaiseErrorMessage("請選擇要上傳的圖片");
                return;
            }
            if (fileImages.PostedFile.ContentLength < 1)
            {
                RaiseErrorMessage("您上傳的文件大小爲 0 KB");
                return;
            }


            //  RaiseErrorMessage(fileImages.PostedFile.ContentLength.ToString());
            string filePath = fileImages.PostedFile.FileName;
            //string filename = filePath.Substring(filePath.LastIndexOf("\\") + 1);
            //擴展名
            string strFileFullName = fileImages.PostedFile.FileName;
            string strExcCaps = System.IO.Path.GetExtension(strFileFullName).ToLower();
            DateTime datetime = DateTime.Now;
            string filename = "img" + datetime.Year.ToString() + datetime.Month.ToString() + datetime.Day.ToString() + datetime.Hour.ToString() + datetime.Minute.ToString() + datetime.Second.ToString() + datetime.Millisecond.ToString() + strExcCaps;

            if (strExcCaps != ".jpg" && strExcCaps != ".gif" && strExcCaps != ".jpeg")
            {
                RaiseErrorMessage("您只能上傳 *.gif,*.jpg,*.jpeg 格式的圖片");
                return;
            }
            string oldFileName = UpLoadImgServer(fileImages, ProPicPath, filename);
            lbPicName.Text = filename;
            #endregion

        }
        catch (Exception error)
        {
            throw (error);
        }

    }
    #endregion

    #region 彈出客戶端提示
    /// <summary>
    /// 彈出客戶端提示
    /// </summary>
    /// <param name="sMessage"></param>
    private void RaiseErrorMessage(string sMessage)
    {
        this.ClientScript.RegisterClientScriptBlock(typeof(string), "", "<script>alert('" + sMessage.Replace("'", "\"") + "');</script>");
    }
    #endregion

//上傳圖片的方法

 public  string UpLoadImgServer(HtmlInputFile UpFile, string strpath, string names)
        {
            try
            {
                if (Directory.Exists(strpath) == false)
                    Directory.CreateDirectory(strpath);
            }
            catch { }
            System.Web.HttpPostedFile postfile = UpFile.PostedFile;
            string strname = postfile.FileName;
            string strnewpath = strpath + names;
            postfile.SaveAs(strnewpath);
            return strnewpath;
        }