Access保存图片

Access保存图片

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Data.OleDb;
namespace Files2Access
{
      /// <summary>
      /// 任意文件保存到access数据库中
      /// 注意:数据库格式!!!
      /// </summary>
      public class File2Access
      {
            
            private string accessName;
            /// <summary>
            /// 指定access路径
            /// </summary>
            /// <param name="s">路径名</param>
            public File2Access(string s)
            {
                  this.accessName = s;
            }
            /// <summary>
            ///使用默认access路径
            /// </summary>
            public File2Access()
            {
                  this.accessName =@"E:\mine\tiku.mdb";
            }
            /// <summary>
            /// 将文件保存到access数据库中
            /// </summary>
            /// <param name="access">access数据库的路径</param>
            /// <param name="file">要保存的文件</param>
            /// <returns></returns>
            public bool insert2access(FileInfo file)
            {
                  OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+accessName);
                  if (file.Exists)
                  {
                        byte[] bdata = null;
                        using (FileStream fs = file.OpenRead())
                        {
                              bdata = new byte[file.Length];
                              int nReadLength = fs.Read(bdata, 0, (int)file.Length);
                        }
                        string strQuery = "INSERT INTO StorageQ "
                                                               + " ( FileName, Content) "
                                                               + " VALUES "
                                                               + " ( @FileName, @Content ) ";
                        OleDbCommand comm = new OleDbCommand(strQuery, conn);
                        comm.Parameters.Add("@FileName", file.Name);
                        comm.Parameters.Add("@Content", bdata);
                        conn.Open();
                        comm.ExecuteNonQuery();
                        return true;
                  }
                  else
                  {
                        return false;
                  }

            }
      }
}

读出文件
源自:http://www.net0and1.com/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Data.OleDb;
namespace Files2Access
{
      public class access2file
      {
            private string fileName;
            private string accessName;
            public access2file(string s1,string s2)
            {
                  fileName = s1;
                  accessName = s2;
            }
            public access2file()
            {
                  fileName = @"c:\noname";
                  this.accessName = @"E:\mine\tiku.mdb";
            }
            
            public bool extractFile(string uNeedFileName)
            {
                  try
                  {
                        byte[] bData = null;
                        OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + accessName);
                        string strQuery = "SELECT Content FROM StorageQ "
                                                            + " WHERE FileName = " +"'"+ uNeedFileName+"'";

                        conn.Open();
                        OleDbCommand comm = new OleDbCommand(strQuery, conn);

                        OleDbDataReader dr = comm.ExecuteReader();
                        while (dr.Read())
                        {
                              bData = (byte[])dr["Content"];
                        }
                        conn.Close();
                        dr.Close();
                        if (bData != null)
                        {
                              // Save file
                              FileInfo fi = new FileInfo(fileName);
                              if (!fi.Exists)
                              {
                                    //Create the file.
                                    using (FileStream fs = fi.Create())
                                    {
                                          fs.Write(bData, 0, bData.Length);
                                    }
                              }
                              else
                              {
                                    //Create the file.
                                    using (FileStream fs = fi.OpenWrite())
                                    {
                                          fs.Write(bData, 0, bData.Length);
                                    }
                              }
                        }
                        return true;
                  }
                  catch (Exception e)
                  {
                        return false;
                  }
                  
            }
      }
}