SQL SERVER 2008中使用VARBINARY(MAX)进行图像存取的实现方法

   CREATE DATABASE ImageTest
　　GO
　　USE ImageTest;
　　GO
　　CREATE TABLE ImageTable
　　(
　　ImageData varBinary(MAX)
　　);

INSERT INTO ImageTable (ImageData)
   SELECT  *
   FROM OPENROWSET(BULK N‘C:\aa.jpg‘, SINGLE_BLOB) AS Photo
GO

     EXEC sp_configure ‘show advanced options‘, 1
　　　GO
　　　RECONFIGURE
　　　GO
　　　EXEC sp_configure ‘xp_cmdshell‘, 1
　　　GO
　　　RECONFIGURE
　　　GO

EXEC   master..xp_cmdshell   ‘bcp "SELECT ImageData FROM ImageTest.dbo.ImageTable" queryout "c:\bb.jpg"-T -c‘
Go

public static bool StoreImages(string[] fileNames, string[] filePaths)
        {
            try
            {
                for (int i = 0; i < fileNames.Length; i++)
                {
                    string fileName = fileNames[i];
                    string filePath = filePaths[i];

                    using (SqlConnection connection = new SqlConnection(PubVariant.ConnectionString))
                    {
                        connection.Open();
                        FileStream byteStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
                        byte[] byteImage = new byte[byteStream.Length];
                        byteStream.Read(byteImage, 0, (int)byteStream.Length);
                        string strSql = "insert into Data(Name,Data,DataPath) values(@Name,@Data,@DataPath)";
                        using (SqlCommand cmd = new SqlCommand(strSql, connection))
                        {
                            cmd.Parameters.Add("@Name", SqlDbType.Text);
                            cmd.Parameters.Add("@Data", SqlDbType.Binary);
                            cmd.Parameters.Add("@DataPath", SqlDbType.Text);
                            cmd.Parameters["@Name"].Value = fileName;
                            cmd.Parameters["@Data"].Value = byteImage;
                            cmd.Parameters["@DataPath"].Value = filePath;
                            cmd.ExecuteNonQuery();
                        }
                    }
                }

                return true;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                return false;
            }            
        }

public static Image GetImageFromName(string fileName)
        {
            try
            {
                using (SqlConnection connection = new SqlConnection(PubVariant.ConnectionString))
                {
                    connection.Open();
                    string strSql = "select Data from Data where Name = ‘" + fileName + "‘";
                    SqlCommand cmd = new SqlCommand(strSql, connection);
                    SqlDataReader dr = cmd.ExecuteReader();
                    dr.Read();
                    MemoryStream ms = new MemoryStream((byte[])dr[0]);
                    Image img = Image.FromStream(ms);
                    return img;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                return null;
            }
        }