如何将图片以二进制的形式存入数据库？
在Winform中，如果将图片以二进制的形式存入数据库？求各位大侠帮帮忙
[最优解释]
字段:1.id 自增长2.img ole对象详细实现代码:default.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <div> <asp:FileUpload ID="FileUpload1" runat="server" /><br /> <br /> <asp:Button ID="Button1" runat="server" Text="上传" OnClick="Button1_Click" /></div> </form></body></html>default.aspx.csusing System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Data.OleDb;using System.IO;public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { try { if (FileUpload1.HasFile) { if (IsAllowedExtension(this.FileUpload1)) { //取得上传文件的大小 int FileLen = FileUpload1.PostedFile.ContentLength; Byte[] FileData = new Byte[FileLen]; //创建访问客户端上传文件的对象 HttpPostedFile hp = FileUpload1.PostedFile; //创建数据流对象 Stream sr = hp.InputStream; //将图片数据放到FileData数组对象实例中，0代表数组指针的起始位置,FileLen代表指针的结束位置 sr.Read(FileData, 0, FileLen); OleDbConnection conn = new OleDbConnection("Provider = Microsoft.JET.OleDB.4.0;Data Source = " + Server.MapPath("mydata.mdb")); conn.Open(); OleDbCommand cmd = new OleDbCommand("insert into table_img(img) values(?)", conn); //存储过程插入到数据库中 OleDbParameter para = new OleDbParameter("?", OleDbType.Binary); para.Value = FileData; cmd.Parameters.Add(para); cmd.ExecuteNonQuery(); //弹出上传成功的提示 Response.Write("<script languge = ‘javascript‘ type = ‘text/javascript‘>alert(‘上传成功‘);</script>"); //关闭数据库连接 conn.Close(); } else { Response.Write("<script languge = ‘javascript‘ type = ‘text/javascript‘>alert(‘上传文件格式不对,只允许上传jpg和gif格式的文件‘);</script>"); } } else { Response.Write("<script language = ‘javascript‘ type = ‘text/javascript‘>alert(‘请选择上传文件‘);</script>"); } } catch { } } #region 实现真正意义上的文件类型判断 public static bool IsAllowedExtension(FileUpload hifile) { System.IO.FileStream fs = new System.IO.FileStream(hifile.PostedFile.FileName, System.IO.FileMode.Open, System.IO.FileAccess.Read); System.IO.BinaryReader r = new System.IO.BinaryReader(fs); string fileclass = ""; byte buffer; try { buffer = r.ReadByte(); fileclass = buffer.ToString(); buffer = r.ReadByte(); fileclass += buffer.ToString(); } catch { } r.Close(); fs.Close(); if (fileclass == "255216"
[其他解释]
http://www.cnblogs.com/tuyile006/archive/2007/01/08/614718.html
[其他解释]
fileclass == "7173")//说明255216是jpg;7173是gif;6677是BMP,13780是PNG;7790是exe,8297是rar { return true; } else { return false; } } #endregion}
