Using System;
Using System.Collections;
Using System.Configuration;
Using System.Data;
Using System.Web;
Using System.Web.Security;
Using System.Web.UI;
Using System.Web.UI.HtmlControls;
Using System.Web.UI.WebControls;
Using System.Web.UI.WebControls.WebParts;
Using System.Drawing;
Using System.IO;
public partial class WebParts_FileUpLoad:System.Web.UI.Page
{
protected string supportextension = "";
protected string uploadpath = "";
protected bool Autofilename;
protected string parentid = "";
protected void Page_Load (object sender, EventArgs e)
{
Supportextension = request.querystring["Supportextension"];
Uploadpath = request.querystring["Uploadpath"];
Autofilename = bool. Parse (request.querystring["Autofilename"). ToString ());
ParentID = request.querystring["ID"]. ToString ();
}
protected void Btup_click (object sender, EventArgs e)
{
Boolean FileOK = false;
if (fileupload1.hasfile)
{
String fileextension =
System.IO.Path.GetExtension (Fileupload1.filename). ToLower ();
string[] allowedextensions = Supportextension.split (new string[] {"|"}, stringsplitoptions.removeemptyentries);
for (int i = 0; i < allowedextensions.length; i++)
{
if (fileextension = = "." + Allowedextensions[i])
{
FileOK = true;
}
}
if (FileOK)
{
String path = "";
String name = "";
String spath = "";
if (autofilename)
{
Name = DateTime.Now.Ticks.ToString () + System.IO.Path.GetExtension (fileupload1.filename). ToLower ();
}
Else
{
name = Fileupload1.filename;
}
spath = Request.physicalapplicationpath + "\" + Uploadpath + "\";
Path = spath + name; Picture Address
string fileName = name; Filename
String filename_s = "S_" + name; Thumbnail file name
Try
{
FileInfo file = new FileInfo (name);
string filecontenttype = FileUpload1.PostedFile.ContentType;
String name = fileupload1.postedfile.filename;//Client file path
String filename_sy = "Sy_" + file. Name; Watermark image file name (text)
String FILENAME_SYP = "Syp_" + file. name;//watermark image file name (picture)
String webfilepath = Server.MapPath (Uploadpath + "\" + fileName);
String webfilepath_s = Server.MapPath (Uploadpath + "\" + filename_s);
String Webfilepath = spath + filename;//server-side file path
String webfilepath_s = spath + filename_s;//server-side thumbnail path
if (! File.exists (Webfilepath))
{
if (FileUpload1.PostedFile.ContentLength < 2 * 1024 * 1024)///If the picture is less than 2M
{
Try
{
Fileupload1.saveas (path); Save a file using the SaveAs method
System.Drawing.Image Image = System.Drawing.Image.FromFile (path);
if (image. Width > 800 | | Image. Height > 600)
{
Makethumbnail (Webfilepath, webfilepath_s, M, N, "W"); How to generate thumbnails
}
Else
{
Makethumbnail (Webfilepath, webfilepath_s, 230, "W"); How to generate thumbnails
}
Image. Dispose ();
Addshuiyinword (Webfilepath, Webfilepath_sy); Save Watermark Text Picture
Addshuiyinpic (Webfilepath, WEBFILEPATH_SYP, WEBFILEPATH_SYPF);//Save the picture after you add the watermark picture
Makethumbnail (Webfilepath, webfilepath_s, RPM, "W"); How to generate thumbnails
Page.registerclientscriptblock ("succcess", @ "<script>
Alert (' upload success ');
Parent.document.getElementById (' "+ ParentID +" _ "+" Tbfilename "+ @"). Value= ' + filename_s + @ ';
</script> ");
}
catch (Exception ex)
{
Page.registerclientscriptblock (' err ', ' <script>alert (' Hint: File upload failed, reason for failure:: "+ ex. Message + "');</script>");
}
}
Else
{
Page.registerclientscriptblock ("Err", "<script>alert (' Hint: picture cannot be greater than 2M ');</script>");
}
}
Else
{
This. Page.registerclientscriptblock ("Err", "<script>alert (' picture repeats ');</script>");
}
}
catch (System.Exception err)
{
This. Page.registerclientscriptblock ("Err", "<script>alert" + Err.) Message + "');</script>");
}
Try
{
Bitmap bmp = new Bitmap (path);
int width = 0, height = 0;
int dvalue = 200;
if (BMP. Width < Dvalue & BMP. Height < 200)
{
width = bmp. Width;
Height = bmp. Height;
}
else if (BMP. Width > BMP. Height)
{
width = dvalue;
Height = Dvalue * (BMP. Width/bmp. Height);
}
Else
{
Height = dvalue;
width = dvalue * (BMP. Height/bmp. Width);
}
This. Page.registerclientscriptblock ("Show", @ "<script>
Parent. Varvalue= ' "+ Uploadpath +"/"+ filename_s +" '; "+
"Parent." + ParentID + "callloaded ();" +
"Parent.document.getElementById ('" + ParentID + "_" + "dvimg" + @ "). Innerhtml=" "+
" "+ @" "";
</script> ");
Bmp. Dispose ();
}
Catch
{
}
Finally
{
Determine if the file exists, or delete the picture if it exists
if (file.exists (path))
{
Delete User Client upload picture, server only save thumbnail image
File.delete (path);
}
}
}
Else
{
This. Page.registerclientscriptblock ("Err", "<script>alert (' Error ');</script>");
}
}
}
<summary>
Generate thumbnails
</summary>
<param name= "Originalimagepath" > Source map Path (physical path) </param>
<param name= "Thumbnailpath" > Thumbnail path (physical path) </param>
<param name= "width" > Thumbnail width </param>
<param name= "height" > thumbnail height </param>
<param name= "mode" > How to Generate Thumbnails </param>
public void Makethumbnail (string originalimagepath, string thumbnailpath, int width, int height, string mode)
{
System.Drawing.Image originalimage = System.Drawing.Image.FromFile (Originalimagepath);
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = Originalimage.width;
int oh = originalimage.height;
Switch (mode)
{
Case "HW"://Specify width scaling (possibly distorted)
Break
Case "W"://Specify wide, high proportionally
Toheight = Originalimage.height * width/originalimage.width;
Break
Case "H"://specified high, wide proportional
Towidth = Originalimage.width * height/originalimage.height;
Break
Case "cut"://Specify width trim (not deformed)
if (double) originalimage.width/double originalimage.height > (double) towidth/double toheight)
{
Oh = originalimage.height;
ow = Originalimage.height * towidth/toheight;
y = 0;
x = (Originalimage.width-ow)/2;
}
Else
{
ow = Originalimage.width;
Oh = originalimage.width * height/towidth;
x = 0;
y = (Originalimage.height-oh)/2;
}
Break
Default
Break
}
Create a new BMP picture
System.Drawing.Image bitmap = new System.Drawing.Bitmap (towidth, toheight);
Create a new artboard
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage (bitmap);
Set high quality interpolation method
G.interpolationmode = System.Drawing.Drawing2D.InterpolationMode.High;
Set high quality, low speed rendering smooth degree
G.smoothingmode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Empty the canvas and fill with a transparent background color
G.clear (System.Drawing.Color.Transparent);
Draws the specified portion of the original picture at the specified location and at the specified size
G.drawimage (Originalimage, New System.Drawing.Rectangle (0, 0, Towidth, toheight),
New System.Drawing.Rectangle (x, Y, Ow, OH),
System.Drawing.GraphicsUnit.Pixel);
Try
{
Save thumbnails in JPG format
Bitmap. Save (Thumbnailpath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (System.Exception e)
{
Throw e;
}
Finally
{
Originalimage.dispose ();
Bitmap. Dispose ();
G.dispose ();
}
}
<summary>
Add a text watermark to a picture
</summary>
<param name= "Path" > Original server picture Path </param>
<param name= "Path_sy" > generated image path with text watermark </param>
protected void Addshuiyinword (String Path, String path_sy)
{
String addtext = "Http://www.jb51.net";
System.Drawing.Image Image = System.Drawing.Image.FromFile (Path);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage (image);
G.drawimage (image, 0, 0, image. Width, image. Height);
System.Drawing.Font f = new System.Drawing.Font ("Verdana", 16);
System.Drawing.Brush B = new System.Drawing.SolidBrush (System.Drawing.Color.Blue);
g.DrawString (AddText, F, B, 15, 15);
G.dispose ();
Image. Save (Path_sy);
Image. Dispose ();
}
<summary>
Generate a picture watermark on a picture
</summary>
<param name= "Path" > Original server picture Path </param>
<param name= "PATH_SYP" > Image path with picture watermark </param>
<param name= "PATH_SYPF" > Watermark image Path </param>
protected void Addshuiyinpic (String Path, String Path_syp, String path_sypf)
{
System.Drawing.Image Image = System.Drawing.Image.FromFile (Path);
System.Drawing.Image copyimage = System.Drawing.Image.FromFile (PATH_SYPF);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage (image);
G.drawimage (Copyimage, new System.Drawing.Rectangle) (image. Width-copyimage.width, image. Height-copyimage.height, Copyimage.width, Copyimage.height), 0, 0, copyimage.width, Copyimage.height, System.Drawing.GraphicsUnit.Pixel);
G.dispose ();
Image. Save (PATH_SYP);
Image. Dispose ();
}
}
Autofilename ture indicates that the file name is automatically generated based on time, does not repeat, False indicates the original picture name, and repeats will overwrite.
