Mega Code Archive
Load image to database
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/*
Quote from
Beginning C# 2005 Databases From Novice to Professional
# Paperback: 528 pages
# Publisher: Apress (December 18, 2006)
# Language: English
# ISBN-10: 159059777X
# ISBN-13: 978-1590597774
*/
using System;
using System.Data;
using System.Data.SqlClient;
using System.IO;
namespace LoadImages
{
class LoadImages
{
string imageFileLocation =@"Images\";
string imageFilePrefix = "milk";
int numberImageFiles = 8;
string imageFileType = ".gif";
int maxImageSize = 10000;
SqlConnection conn = null;
SqlCommand cmd = null;
static void Main()
{
LoadImages loader = new LoadImages();
try
{
// Open connection
loader.OpenConnection();
// Create command
loader.CreateCommand();
// Create table
loader.CreateImageTable();
// Prepare insert
loader.PrepareInsertImages();
// Insert images
int i;
for (i = 1; i <= loader.numberImageFiles; i++)
{
loader.ExecuteInsertImages(i);
}
}
catch (SqlException ex)
{
Console.WriteLine(ex.ToString());
}
finally
{
loader.CloseConnection();
}
}
void OpenConnection()
{
// Create connection
conn = new SqlConnection(@"server = .\sqlexpress;integrated security = true;database = tempdb");
// Open connection
conn.Open();
}
void CloseConnection()
{
conn.Close();
Console.WriteLine("Connection Closed.");
}
void CreateCommand()
{
cmd = new SqlCommand();
cmd.Connection = conn;
}
void ExecuteCommand(string cmdText)
{
int cmdResult;
cmd.CommandText = cmdText;
Console.WriteLine("Executing command:");
Console.WriteLine(cmd.CommandText);
cmdResult = cmd.ExecuteNonQuery();
Console.WriteLine("ExecuteNonQuery returns {0}.", cmdResult);
}
void CreateImageTable()
{
ExecuteCommand(@"create table imagetable(
imagefile nvarchar(20),
imagedata varbinary(max))");
}
void PrepareInsertImages()
{
cmd.CommandText = @"insert into imagetable values (@imagefile, @imagedata)";
cmd.Parameters.Add("@imagefile", SqlDbType.NVarChar, 20);
cmd.Parameters.Add("@imagedata", SqlDbType.Image, 1000000);
cmd.Prepare();
}
void ExecuteInsertImages(int imageFileNumber)
{
string imageFileName = null;
byte[] imageImageData = null;
imageFileName =imageFilePrefix + imageFileNumber.ToString() + imageFileType;
imageImageData =LoadImageFile(imageFileName, imageFileLocation, maxImageSize);
cmd.Parameters["@imagefile"].Value = imageFileName;
cmd.Parameters["@imagedata"].Value = imageImageData;
ExecuteCommand(cmd.CommandText);
}
byte[] LoadImageFile(string fileName,string fileLocation,int maxImageSize)
{
byte[] imagebytes = null;
string fullpath = fileLocation + fileName;
Console.WriteLine("Loading File:");
Console.WriteLine(fullpath);
FileStream fs = new FileStream(fullpath, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
imagebytes = br.ReadBytes(maxImageSize);
Console.WriteLine("Imagebytes has length {0} bytes.",imagebytes.GetLength(0));
return imagebytes;
}
}
}
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