To create a table containing first segment image from each image type and type and vnanchar WebForm1.aspx <% @ Page language = "c #" Codebehind = "WebForm1.aspx.cs" AutoEventWireup = "false" Inherits = "ReadAndWritePicFromDB.WebForm1" %>
Webform1 </ title> <meta name = "generator" content = "Microsoft Visual Studio .NET 7.1 "> <meta name =" CODE_LANGUAGE "Content =" C # "> <meta name =" vs_defaultClientScript "content =" JavaScript "> <meta name =" vs_targetSchema "content =" http://schemas.microsoft.com / intelliSense / IE5 "> </ head> <body ms_positioning =" gridLayout "> <form id =" form1 "method =" post "runat =" server "> <font face =" Song "> <input id =" file1 "style =" z-index: 101; Left: 112px; position: absolute; top: 88px "Type =" file "name =" file1 "runat =" server "> </ font> <ask: button id =" Button1 "style =" z-index: 102; left: 400px; position: absolute; top: 88px "runat =" server "text =" write "width =" 104px "> </ asp: button> <ask: button id = "Button2" style = "Z-Index: 103; Left: 552px; Position: absolute; t OP: 88px "runat =" server "text =" read "width =" 105px "> </ asp: button> </ form> </ body> </ html> Webform1.aspx.cs using system; using system.collections Using system.componentmodel; using system.data; using system.drawing;</p>
<p>using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using System.IO; using System.Data.SqlClient; namespace A summary description of readanDwritePicFromDB {/// <summary> /// WebForm1.</p>
<p>/// </ summary> public class WebForm1: System.Web.UI.Page {protected System.Web.UI.HtmlControls.HtmlInputFile File1; protected System.Web.UI.WebControls.Button Button1; private string fileName = ""; protected System.Web.UI.WebControls.Button Button2; private static SqlConnection conn = null; private void Page_Load (object sender, System.EventArgs e) {// Put user code to initialize the page here connectDB ();} // get file name private string GetFile () {HttpPostedFile file = File1.PostedFile; fileName = file.FileName; return fileName;} // read the contents of the file private byte [] ReadFile () {FileStream file = File.OpenRead (GetFile () ); Byte [] content = new byte [file.Length]; file.read (content, 0, content.length); file.close (); return content;} // Connect Database Private Void ConnectDb () {String Connstr = "Initial catalog =; data source =; user id =; password =;"; conn = new sqlconnection (conn.open ();} // Write into the database Private void writeImage () {SQLCommand Command Command Command = conn.createCommand (); CO mm.CommandText = "insert into images (image, type) values (@ image, @ type)"; comm.CommandType = CommandType.Text; SqlParameter param = comm.Parameters.Add ( "@ image", SqlDbType.Image); Param.Value = readfile (); param = comm.Parameters.add ("@ type", sqldbtype.nvarchar); param.value = getContentType (new fileinfo (filename) .extension.Remove (0, 1)); if ( Comm.executenonQuery () == 1) Response.write ("Successful"); Else Response.write ("fail"); conn.close ();} // Get a picture of the Srund String getContentType (String Extension) { String Type = "";</p>
<p>IF (extension.equals ("jpg") || extension.equals ("jpg")) type = "jpeg"; else type = extension; return "image /" type;} // Read the picture from the database Private void ReadImage () {SqlCommand comm = conn.CreateCommand (); comm.CommandText = "select image, type from images"; comm.CommandType = CommandType.Text; SqlDataReader reader = comm.ExecuteReader (); while (reader.Read ( )) {Response.contentType = reader ["type"]. ToString (); // Read and write type must set otherwise the browser will be as a text to output response.binaryWrite ((byte []) reader ["image"]) ; // Picture Data} Response.write ("successful"); response.end (); conn.close ();} #Region Web Form Designer Generated Code Override Protected Void OnInit (Eventargs E) {// / / Codegen: This call is required for the ASP.NET Web Form Designer. // InitializeComponent (); base.onit (e);} /// <summary> /// Designer Supports the required method - Do not use the code editor to modify the // / this method. /// </ summary> private void InitializeComponent () {this.Button1.Click = new System.EventHandler (this.Button1_Click); this.Button2.Click = new System.EventHandler (this.Button2_Click); this.Load = new System.EventHandler (this.Page_Load);} #endregion private void Button1_Click (object sender, System.EventArgs e) {writeImage ();} private void Button2_Click (object sender, System.EventArgs e) {try {ReadImage ( ); (Exception EP) {conn.close (); response.end ();}}}} author blog:</p>
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