Multi-page TIFF images are displayed on the aspx page,

Multi-page TIFF images are displayed on the aspx page,

I. Logical implementation: Read Binary TIFF images from the database and display them on pages.

1. Display Interface

Public FrameDimension MyGuid; public static int MyPos = 0; public static int totalPage = 0; public static MemoryStream stream; protected void Page_Load (object sender, EventArgs e) {if (! IsPostBack) {string username = Request. queryString ["username"]; string SQL = string. format ("select top (1) image from Image_Table where image_code = (select new_sjbh from new_ksy_dzpz where new_ksy_dzpzid = '{0}')", username); DataTable dt = SqlHelper. getTable (SQL); if (dt. rows. count> 0) {Image1.ImageUrl = "ShowImage. aspx? Username = "+ username +" & pagecount = 0 "; stream = new MemoryStream (byte []) dt. rows [0] ["image"]); // Bitmap bt = new Bitmap (Server. mapPath (Image1.ImageUrl); Bitmap bt = new Bitmap (stream); Guid gud = (Guid) bt. frameDimensionsList. getValue (0); FrameDimension fds = new FrameDimension (gud); totalPage = bt. getFrameCount (fds); // get the page number this. labelPageCount. text = totalPage. toString (); this. labelCurrentPage. te Xt = "1"; if (totalPage = 1) {this. linkButtonPreviousPage. enabled = false; // the previous page is read-only this. linkButtonFirstPage. enabled = false; // The homepage is read-only this. linkButtonNextPage. enabled = false; // next page read-only this. linkButtonLastPage. enabled = false; // The last page is read-only this. btnGo. enabled = false ;}} this. linkButtonPreviousPage. enabled = false; // the previous page is read-only this. linkButtonFirstPage. enabled = false; // homepage read-only} // download protected void Button1_Click (obj Ect sender, EventArgs e) {string username = Request. queryString ["username"]; string SQL = string. format ("select top (1) image, name from Image_Table where image_code = (select new_sjbh from new_ksy_dzpz where new_ksy_dzpzid = '{0}')", username); DataTable dt = SqlHelper. getTable (SQL); if (dt. rows. count> 0) {byte [] bytes = (byte []) dt. rows [0] ["image"]; // download a single credential Response. buffer = true; Page. response. Clear (); // Clear all the buffer content Page. response. contentType = "application/octet-stream"; Page. response. addHeader ("Content-Disposition", "attachment; filename =" + HttpUtility. urlEncode (dt. rows [0] ["name"]. toString () + ". tiff "); Response. binaryWrite (bytes); Response. flush (); Response. end () ;}// next page protected void LinkButtonNextPage_Click (object sender, EventArgs e) {int page = Convert. toInt32 (this. labelCurrent Page. text); this. labelCurrentPage. text = Convert. toString (page + 1); fenyeshow (page) ;}// previous page protected void LinkButtonPreviousPage_Click (object sender, EventArgs e) {int page = Convert. toInt32 (this. labelCurrentPage. text)-2; this. labelCurrentPage. text = Convert. toString (page + 1); fenyeshow (page) ;}// homepage protected void LinkButtonFirstPage_Click (object sender, EventArgs e) {int page = 0; this. L AbelCurrentPage. text = "1"; fenyeshow (page);} // protected void LinkButtonLastPage_Click (object sender, EventArgs e) {int page = Convert. toInt32 (this. labelPageCount. text)-1; this. labelCurrentPage. text = this. labelPageCount. text; fenyeshow (page);} // Go protected void btnGo_Click (object sender, EventArgs e) {int page = 0; if (this.txt NewPageIndex. text! = "") {Int pagecount = Convert. toInt32 (this. labelPageCount. text); int txt = Convert.ToInt32(this.txt NewPageIndex. text); if (txt <= pagecount & txt> 0) {page = Convert.ToInt32(this.txt NewPageIndex. text)-1; this. labelCurrentPage. text = this.txt NewPageIndex. text ;}} if (page = 0) {this. labelCurrentPage. text = "1" ;}fenyeshow (page) ;}// display the public void fenyeshow (int pagecount) {string userna Me = Request. QueryString ["username"]; Image1.ImageUrl = "ShowImage. aspx? Username = "+ username +" & pagecount = "+ pagecount. toString (); if (this. labelCurrentPage. text = "1") {this. linkButtonPreviousPage. enabled = false; // the previous page is read-only this. linkButtonFirstPage. enabled = false; // The homepage is read-only this. linkButtonNextPage. enabled = true; this. linkButtonLastPage. enabled = true;} if (this. labelCurrentPage. text = this. labelPageCount. text) {this. linkButtonNextPage. enabled = false; // next page read-only this. linkButtonLastPage. enabled = false; // The last page is read-only this. linkButtonPreviousPage. enabled = true; this. linkButtonFirstPage. enabled = true ;}}Default. aspx

2. Output page

Public static MemoryStream stream; protected void Page_Load (object sender, EventArgs e) {string username = Request. queryString ["username"]; int pagecount = int. parse (Request. queryString ["pagecount"]); string SQL = string. format ("select top (1) image from Image_Table where image_code = (select new_sjbh from new_ksy_dzpz where new_ksy_dzpzid = '{0}')", username); DataTable dt = SqlHelper. getTable (SQL ); If (dt. rows. count> 0) {stream = new MemoryStream (byte []) dt. rows [0] ["image"]);} if (pagecount> = 0) {getImage (pagecount. toString () ;}} void getImage (string pp) // outputs the Jpeg format image stream based on the path {Bitmap bt = new Bitmap (stream); Guid gud = (Guid) bt. frameDimensionsList. getValue (0); FrameDimension fds = new FrameDimension (gud); if (pp! = "") {Int qq = Convert. toInt16 (pp); bt. selectActiveFrame (fds, qq);} MemoryStream ss = new MemoryStream (); bt. save (Server. mapPath ("1.jpg"); bt. save (ss, ImageFormat. jpeg); byte [] bb = ss. getBuffer (); ss. read (bb, 0, (int) ss. length); // this. ID_img.ImageUrl = Convert. toString (bb); Response. binaryWrite (bb); ss. close (); bt. dispose (); Response. end ();}ShowImage. aspx

Tips: The 1.jpg file is generated under the root directory. If the migration code is used, delete the 1.jpg file!