图片上传 显示缩略图_.NET_编程开发_程序员俱乐部

monospace; border-bottom-style: none; color: black; padding-bottom: 0px; direction: ltr; text-align: left; padding-top: 0px; border-right-style: none; padding-left: 0px; margin: 0em; line-height: 12pt; padding-right: 0px; width: 100%; background-color: white"><td>

        <asp:FileUpload ID="fuImages" runat="server" /><asp:Button ID="btnUpload" runat="server"

              Text="上传" OnClick="btnUpload_Click" /><asp:Image ID="imgPreview" runat="server" Height="50" Width="140" AlternateText="暂无图片" />          

</td>

.CS

protected void btnUpload_Click(object sender, EventArgs e)

{

    if (ViewState["VendorID"].ToString() == "0")

    {

        myShare.WebMessageBox(this.Page, "图片上传对应的资料不存在,无法上传,请在列表页面选择一笔资料再进行上传");

    }

    string mPath = uploadImage(fuImages);

    if (mPath == "")

    {

        myShare.WebMessageBox(this.Page, "请选择图片");

        return;

    }

    if (mPath == "eX")

    {

        myShare.WebMessageBox(this.Page, "图片上传失败！请重试");

        return;

    }

    myShare.SetAField(0, "LogoUrl", "'" + mPath + "'", "Vendors", "VendorID=" + ViewState["VendorID"].ToString());   

    imgPreview.ImageUrl = mPath;

    //myShare.WebMessageBox(this.Page, "图片上传成功");

}

private string uploadImage(FileUpload pControlName)

{

    string str = "";

    Random rd = new Random();

    string mImageNewName = DateTime.Now.ToString("yyyyMMddHHmmssffff") + rd.Next(1000, 9999).ToString();//生成图片名

    if (pControlName.PostedFile.ContentLength > 0)

    {

        //将图片切割为统一大小----start

        HttpPostedFile mImg = pControlName.PostedFile;

        System.IO.Stream mImgStr = mImg.InputStream;

        System.Drawing.Image mImage = System.Drawing.Image.FromStream(mImgStr);

        int mWidth = mImage.Width;

        int mHeight = mImage.Height;

        int mNWidth = 140, mNHeith = 50;

        System.Drawing.Image mNImage = mImage.GetThumbnailImage(mNWidth, mNHeith, null, IntPtr.Zero);

        //将图片切割为统一大小------end

        int mStart = pControlName.PostedFile.FileName.LastIndexOfAny("\\".ToCharArray());

        string mName = pControlName.PostedFile.FileName.Substring(mStart + 1);

        string[] mStrName = mName.Split('.');

        //上传至Ne下

        string mPath = "images/TreeView/";

        string mPhysicalPath = HttpContext.Current.Server.MapPath(mPath);

        if (!Directory.Exists(mPhysicalPath))

            Directory.CreateDirectory(mPhysicalPath);

        string mPhysicalName = HttpContext.Current.Server.MapPath(mPath + mImageNewName + '.' + mStrName[1]);

        //上传至Ne_Oversea下

        string mOverseaPhysicalPath = mPhysicalPath.ToLower().Replace("Ne\\images", "Ne_Oversea\\PubImage");

        if (!Directory.Exists(mOverseaPhysicalPath))

            Directory.CreateDirectory(mOverseaPhysicalPath);

        string mOverseaPhyiscalName = mOverseaPhysicalPath + "\\" + mImageNewName + '.' + mStrName[1];

        try

        {

            pControlName.PostedFile.SaveAs(mPhysicalName);

            pControlName.PostedFile.SaveAs(mOverseaPhyiscalName);

            str = mPath + mImageNewName + '.' + mStrName[1];

        }

        catch (Exception ex)

        {

            str = "eX";

        }

    }   

    return str;

}