图片以字节的形式存入数据库，下面是图片显示处理

最新推荐文章于 2022-06-01 11:14:22 发布

原创最新推荐文章于 2022-06-01 11:14:22 发布 · 622 阅读

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#数据库 #input #border #class #div #object

本文介绍如何在ASP.NET页面中实现一个显示特定图片的功能，包括获取图片信息、序列化与反序列化图片对象、并将其以JPEG格式返回。

添加一个页面ShowImage.aspx

页面代码为

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ShowImage.aspx.cs" Inherits="Test.ShowImage" %>

.cs代码如下

using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; 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.Xml.Linq; using System.IO; using System.Runtime.Serialization.Formatters.Binary; namespace Test{ public partial class ShowImage : System.Web.UI.Page { protected System.Drawing.Image img; protected IOSS3.Item.Model.Itm_ImageInfo _ImageInfo; protected void Page_Load(object sender, EventArgs e) { if (Request.QueryString == null || Request.QueryString["ImageGuid"] == null || Request.QueryString["ImageGuid"].ToString() == "") return; try { Guid ImageGuid = new Guid(Request.QueryString["ImageGuid"]); _ImageInfo = WebCommon.EpicItem.ItemImage.GetImageInfo(ImageGuid); if (_ImageInfo != null) { MemoryStream ms = new MemoryStream(_ImageInfo.Picture, 0, _ImageInfo.Picture.Length); BinaryFormatter bf = new BinaryFormatter(); object obj = bf.Deserialize(ms); ms.Close(); img = (System.Drawing.Image)obj; MemoryStream mem = new MemoryStream(); img.Save(mem, System.Drawing.Imaging.ImageFormat.Jpeg); byte[] by = mem.ToArray(); mem.Close(); Response.BinaryWrite(by); Response.End(); } } catch { } } } }

下面是具体的页面使用

<asp:Repeater ID="rptItemPackage" runat="server"> <ItemTemplate> <div class="lproduct"> <table width="551" height="114" cellspacing="10"> <tr> <td width="73" rowspan="2" align="center"><div style="border:2px solid #35a9ff; width:69px; height:90px;"><div style="border:1px solid #FFFFFF; width:67px; height:88px;"><a><img src="ShowImage.aspx?ImageGuid=<%#DataBinder.Eval(Container.DataItem," mce_src="ShowImage.aspx?ImageGuid=<%#DataBinder.Eval(Container.DataItem,"IcoGuid") %>" width="65" height="86" style="border:0px" /></a></div></div></td> <td height="16" colspan="3" class="gra"><div align="left"><b><%# Eval("Name")%></b></div> <div align="center"></div> <div align="center"></div></td> </tr> <tr> <td height="60"> <%# Eval("Summary")%> </td> <td width="49"><span class="gra" style="color:#CC0000; font-weight:bold" mce_style="color:#CC0000; font-weight:bold">$<%# Eval("Price")%></span><span class="gra"> </span></td> <td width="97"><%--<img src="images/cart.gif" mce_src="images/cart.gif" width="95" height="23" />--%> <form action="/ShoppingCart.aspx" method="post"> <input type="hidden" name="IcoGuid" value="<%#DataBinder.Eval(Container.DataItem,"IcoGuid") %>" /> <input type="hidden" name="Property" value="<%#DataBinder.Eval(Container.DataItem,"Property") %>" /> <input type="hidden" name="Summary" value="<%#DataBinder.Eval(Container.DataItem,"Summary") %>" /> <input type="hidden" name="TypeGuid" value="<%#DataBinder.Eval(Container.DataItem,"TypeGuid") %>" /> <input type="hidden" name="Price" value="<%#DataBinder.Eval(Container.DataItem,"Price") %>" /> <input type="hidden" name="SeriesType" value="<%#DataBinder.Eval(Container.DataItem,"SeriesType") %>" /> <input type="hidden" name="Guid" value="<%#DataBinder.Eval(Container.DataItem,"Guid") %>" /> <input type="hidden" name="Name" value="<%#DataBinder.Eval(Container.DataItem,"Name") %>" /> <input type="hidden" name="promotion" value="0" /> <input type="image" name="butbuy" id="butbuy" src="images/cart.gif" mce_src="images/cart.gif" type="image" width="95" height="23" /> </form> </td> </tr> </table> </div> </ItemTemplate> </asp:Repeater>