First create a table containing self-paragement and type types for image 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; TOP: 88PX "Runat =" server "text =" read "width =" 105px "> </ asp: butt ON> </ form> </ body> </ html></p>
<p>Webform1.aspx.cs</p>
<p>using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; 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 ReadanDwritePicFromDB {/// <summary> /// WebForm1 summary description. /// </ 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 ();}</p>
<p>// Get file name private string getFile () {httppostedfile file = file1.postedfile; filename = file.filename;</p>
<p>Return filename;}</p>
<p>// Read file content private bote [] readfile () {filestream file = file.openread (getfile ()); byte [] content = new byte [file.length]; file.read (content, 0, content.length); ref- File.close (); Return Content;}</p>
<p>// Connect the database private void connectiondb () {string connStr = "initial catalog =; data source =; user ID =; password =;"; conn = new sqlconnection (conn.open ();</p>
<p>// Write a picture into the database private void writeImage () {sqlcommand comm = conn.createCommand (); comm.commandtext = "INTO images (Image, @ type)"; comm.comMandType = 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 ();</p>
<p>/ / Get the compact name of the picture private string getContentType (String Extension) {String Type = "</p>
<p>IF (extension.equals ("jpg") || extension.equals ("jpg")) TYPE = "JPEG"; else type = extension;</p>
<p>Return "Image /" Type;}</p>
<p>// Read the picture from the database private void readimage () {sqlcommand comm = conn.createCommand (); comm.commandtext = "select image, type from images"; comm.commandtype = commandtype.text ;. COMMA.TEXT;</p>
<p>SqlDataReader Reader = Comm.executeReader (); while (Reader.Read ()) {response.contentType = Reader ["type"]. TOSTRING (); // Read and write Type must set otherwise the browser will be treated as a text Output Response .BinaryWrite ((byte []) reader ["image"]); // picture data}</p>
<p>Response.write ("Successful"); response.end ();</p>
<p>Conn.close ();} #Region Web Form Designer Generated Code Override Protected Void OnNit (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</p>
<p>Private void button1_click (object sender, system.eventargs e) {WriteImage ();</p>
<p>Private void button2_click (object sender, system.eventargs e) {Try {readimage ();} catch (exception ep) {conn.close (); response.end ();}}}}</p></div><div class="text-center mt-3 text-grey">
转载请注明原文地址:https://www.9cbs.com/read-119810.html</div><div class="plugin d-flex justify-content-center mt-3"></div><hr><div class="row"><div class="col-lg-12 text-muted mt-2"><i class="icon-tags mr-2"></i><span class="badge border border-secondary mr-2"><h2 class="h6 mb-0 small"><a class="text-secondary" href="tag-2.html">9cbs</a></h2></span></div></div></div></div><div class="card card-postlist border-white shadow"><div class="card-body"><div class="card-title"><div class="d-flex justify-content-between"><div><b>New Post</b>(<span class="posts">0</span>)
</div><div></div></div></div><ul class="postlist list-unstyled">
</ul></div></div><div class="d-none threadlist"><input type="checkbox" name="modtid" value="119810" checked /></div></div></div></div></div><footer class="text-muted small bg-dark py-4 mt-3" id="footer"><div class="container"><div class="row"><div class="col">CopyRight © 2020 All Rights Reserved
</div><div class="col text-right">Processed:
<b>0.050</b>, SQL:
<b>9</b></div></div></div></footer><script src="./lang/en-us/lang.js?2.2.0"></script><script src="view/js/jquery.min.js?2.2.0"></script><script src="view/js/popper.min.js?2.2.0"></script><script src="view/js/bootstrap.min.js?2.2.0"></script><script src="view/js/xiuno.js?2.2.0"></script><script src="view/js/bootstrap-plugin.js?2.2.0"></script><script src="view/js/async.min.js?2.2.0"></script><script src="view/js/form.js?2.2.0"></script><script>
var debug = DEBUG = 0;
var url_rewrite_on = 1;
var url_path = './';
var forumarr = {"1":"Tech"};
var fid = 1;
var uid = 0;
var gid = 0;
xn.options.water_image_url = 'view/img/water-small.png';
</script><script src="view/js/wellcms.js?2.2.0"></script><a class="scroll-to-top rounded" href="javascript:void(0);"><i class="icon-angle-up"></i></a><a class="scroll-to-bottom rounded" href="javascript:void(0);" style="display: inline;"><i class="icon-angle-down"></i></a></body></html><script>
var forum_url = 'list-1.html';
var safe_token = 'lS73873FD_2BuwYiBEP1d4eSW8H7bJR5Vcb1PfX6QbJUj3gddPtR_2BF3pBsZ8M9U8VVAmWe2qN3U49pHJDp';
var body = $('body');
body.on('submit', '#form', function() {
var jthis = $(this);
var jsubmit = jthis.find('#submit');
jthis.reset();
jsubmit.button('loading');
var postdata = jthis.serializeObject();
$.xpost(jthis.attr('action'), postdata, function(code, message) {
if(code == 0) {
location.reload();
} else {
$.alert(message);
jsubmit.button('reset');
}
});
return false;
});
function resize_image() {
var jmessagelist = $('div.message');
var first_width = jmessagelist.width();
jmessagelist.each(function() {
var jdiv = $(this);
var maxwidth = jdiv.attr('isfirst') ? first_width : jdiv.width();
var jmessage_width = Math.min(jdiv.width(), maxwidth);
jdiv.find('img, embed, iframe, video').each(function() {
var jimg = $(this);
var img_width = this.org_width;
var img_height = this.org_height;
if(!img_width) {
var img_width = jimg.attr('width');
var img_height = jimg.attr('height');
this.org_width = img_width;
this.org_height = img_height;
}
if(img_width > jmessage_width) {
if(this.tagName == 'IMG') {
jimg.width(jmessage_width);
jimg.css('height', 'auto');
jimg.css('cursor', 'pointer');
jimg.on('click', function() {
});
} else {
jimg.width(jmessage_width);
var height = (img_height / img_width) * jimg.width();
jimg.height(height);
}
}
});
});
}
function resize_table() {
$('div.message').each(function() {
var jdiv = $(this);
jdiv.find('table').addClass('table').wrap('<div class="table-responsive"></div>');
});
}
$(function() {
resize_image();
resize_table();
$(window).on('resize', resize_image);
});
var jmessage = $('#message');
jmessage.on('focus', function() {if(jmessage.t) { clearTimeout(jmessage.t); jmessage.t = null; } jmessage.css('height', '6rem'); });
jmessage.on('blur', function() {jmessage.t = setTimeout(function() { jmessage.css('height', '2.5rem');}, 1000); });
$('#nav li[data-active="fid-1"]').addClass('active');
</script>
