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Re: How to get file detail info like ImageWidth?

  •  06-16-2011, 4:54 PM

    Re: How to get file detail info like ImageWidth?

    Hi RaymondC,
     
    Please refer to http://ajaxuploader.com/Demo/Ajax-based-user-profile.aspx, the following is its source code:

    <%@ Page Language="C#" %>

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

    <script runat="server">
      protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);
            SampleUtil.SetPageCache();
        }
        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            if (!IsPostBack)
            {
                LoadView();
            }
        }

        private void LoadView()
        {
            DataRow row = SampleDB.GetCurentUserRow();

            TextBoxSignature.Text = row["Signature"].ToString();
            TextBoxDescription.Text = row["Description"].ToString();
            string photoname = row["PhotoTempFileName"].ToString();
            if (string.IsNullOrEmpty(photoname))
            {
                ImagePhoto.ImageUrl = "~/sampleimages/anonymous.gif";
            }
            else
            {
                ImagePhoto.ImageUrl = "UserPhoto.ashx?User=" + row["UserName"] + "&_hash=" + photoname.GetHashCode();
            }
        }

        double MaxWidth = 160.0;
        double MaxHeight = 120.0;

        protected void UploadPhoto_FileUploaded(object sender, UploaderEventArgs args)
        {
            try
            {
                System.Drawing.Bitmap img;
                using (Stream stream = args.OpenStream())
                {
                    img = new System.Drawing.Bitmap(stream);
                }
                using (img)
                {
                    if (img.Width > MaxWidth || img.Height > MaxHeight)
                    {
                        double scale = Math.Max(img.Width / MaxWidth, img.Height / MaxHeight);
                        int w = (int)(img.Width / scale);
                        int h = (int)(img.Height / scale);
                        //System.Drawing.Image.GetThumbnailImageAbort

                        try
                        {
                            using (System.Drawing.Image thumb = new System.Drawing.Bitmap(w, h, System.Drawing.Imaging.PixelFormat.Format24bppRgb))
                            {
                                using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(thumb))
                                {
                                    g.DrawImage(img
                                        , new System.Drawing.Rectangle(0, 0, w, h)
                                        , new System.Drawing.Rectangle(0, 0, img.Width, img.Height)
                                        , System.Drawing.GraphicsUnit.Pixel);
                                }

                                thumb.Save(args.GetTempFilePath(), System.Drawing.Imaging.ImageFormat.Png);
                                LabelPhotoError.Text = "The image is uploaded and resized.";
                            }

                        }
                        catch (Exception x)
                        {
                            LabelPhotoError.Text = w + ":" + h + ":" + x.ToString();
                            args.Delete();
                        }
                    }
                }
            }
            catch (Exception x)
            {
                LabelPhotoError.Text = x.ToString();
                args.Delete();
            }
        }

        protected void UploadPhoto_FileChanged(object sender, PersistedFileEventArgs args)
        {
            ImagePhoto.ImageUrl = "ShowUploadPhoto.ashx?Guid=" + args.FileGuid;
        }

        protected void ButtonUpdate_Click(object sender, EventArgs e)
        {
            int userid = SampleDB.GetCurrentUserId();

            if (UploadPhoto.File != null)
            {
                DataRow row = SampleDB.GetCurentUserRow();
                string oldphotoname = row["PhotoTempFileName"].ToString();

                string filedir = SampleUtil.GetFileDirectory();
                string newfilename = "photo." + UploadPhoto.File.FileGuid + "." + UploadPhoto.File.FileName + ".resx";
                UploadPhoto.File.MoveTo(Path.Combine(filedir, newfilename));
                SampleDB.ExecuteNonQuery("UPDATE UploaderUsers SET Signature={1},Description={2},PhotoTempFileName={3} WHERE UserId={0}"
                , userid, TextBoxSignature.Text, TextBoxDescription.Text, newfilename);

                if (!string.IsNullOrEmpty(oldphotoname))
                {
                    string oldphotopath = Path.Combine(filedir, oldphotoname);
                    if (File.Exists(oldphotopath))
                    {
                        File.Delete(oldphotopath);
                    }
                }
            }
            else
            {
                SampleDB.ExecuteNonQuery("UPDATE UploaderUsers SET Signature={1},Description={2} WHERE UserId={0}"
                , userid, TextBoxSignature.Text, TextBoxDescription.Text);
            }

            SampleDB.ExecuteNonQuery("UPDATE UploaderUsers SET IPAddress={1} WHERE UserId={0}", userid, Context.Request.UserHostAddress);

            SampleDB.ResetCurrentUserRow();

            LoadView();

            int time = 0;
            if (ViewState["SaveOK"] != null)
                time = (int)ViewState["SaveOK"];
            time++;
            ViewState["SaveOK"] = time;

            ButtonUpdate.Text = "Update successfully " + new string('!', time);
        }
    </script>

    <html xmlns="http://www.w3.org/1999/xhtml" >
    <head runat="server">
        <title>Ajax based user profile</title>
         <link rel="stylesheet" href="demo.css" type="text/css" />
    </head>
    <body>
        <form id="form1" runat="server">

                    <div class="content">
                     
                      <h2>Ajax based user profile</h2>
        <p>User profile is the primary part of a community application. Ever wanted to allow users update the images of their profiles using AJAX without reloading the page? Test it now! </p>
        <table cellpadding="2" cellspacing="2">
            <tr>
                <td valign="top">Image:
                </td>
                <td valign="top"> <asp:Image ID="ImagePhoto" runat="server" CssClass="ImagePhoto" /> <br />
                <CuteWebUI:UploadPersistedFile AutoUseSystemTempFolder="false" runat="server" ID="UploadPhoto" DirtyText="(not saved)"
                InsertText="Change the profile Image" OnFileUploaded="UploadPhoto_FileUploaded" OnFileChanged="UploadPhoto_FileChanged"
                ItemTextTemplate="<br/>{0} {1} ({2})">
                <ValidateOption AllowedFileExtensions="jpg,jpeg,gif,png" />
            </CuteWebUI:UploadPersistedFile>
                </td>
            </tr>
            <tr>
                <td valign="top">Description:
                </td>
                <td valign="top"><asp:TextBox ID="TextBoxDescription" runat="server" Height="50px" TextMode="MultiLine"
                Width="250px"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td valign="top">Signature:
                </td>
                <td valign="top"><asp:TextBox ID="TextBoxSignature" runat="server" Height="50px" TextMode="MultiLine"
                Width="250px"></asp:TextBox>
                </td>
            </tr>
            <tr>
           
                <td colspan="2">
               
            <asp:Button ID="ButtonUpdate" runat="server" OnClick="ButtonUpdate_Click" Text="Save My Information" />
            <asp:Label ID="LabelPhotoError" runat="server" EnableViewState="false" Font-Bold="true" ForeColor="red"></asp:Label>
          
                </td>
            </tr>
        </table>
      
        <asp:Label ID="l1" runat="server"></asp:Label>&nbsp;&nbsp;
        <asp:Label ID="l2" runat="server"></asp:Label>
                    </div>
               
        </form>
    </body>
    </html>

    Thanks for asking
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