Home  >  Article  >  Database  >  How to store pictures in mysql

How to store pictures in mysql

王林
王林Original
2020-10-15 11:06:1115895browse

把图片存储在mysql中的方法:1、获取需要保存的图片;2、将图片上传到指定路径下的文件夹中;3、将路径保存到变量,并将变量的值保存到数据库中的相应字段即可。

How to store pictures in mysql

具体方法一般有两种:

1、将图片保存的路径存储到数据库;

2、将图片以二进制数据流的形式直接写入数据库字段中。

(推荐教程:mysql视频教程

一、保存图片的上传路径到数据库:

string uppath="";//用于保存图片上传路径
  //获取上传图片的文件名
  string fileFullname = this.FileUpload1.FileName;
  //获取图片上传的时间,以时间作为图片的名字可以防止图片重名
  string dataName = DateTime.Now.ToString("yyyyMMddhhmmss");
  //获取图片的文件名(不含扩展名)
  string fileName = fileFullname.Substring(fileFullname.LastIndexOf("\\") + 1);
  //获取图片扩展名
  string type = fileFullname.Substring(fileFullname.LastIndexOf(".") + 1);
  //判断是否为要求的格式
  if (type == "bmp" || type == "jpg" || type == "jpeg" || type == "gif" || type == "JPG" || type == "JPEG" || type == "BMP" || type == "GIF")
  {
     //将图片上传到指定路径的文件夹
     this.FileUpload1.SaveAs(Server.MapPath("~/upload") + "\\" + dataName + "." + type);
     //将路径保存到变量,将该变量的值保存到数据库相应字段即可
     uppath = "~/upload/" + dataName + "." + type;
  }

二、将图片以二进制数据流直接保存到数据库:

    引用如下命名空间:  
    using System.Drawing;
  using System.IO;
  using System.Data.SqlClient;
  设计数据库时,表中相应的字段类型为iamge
  保存:
  //图片路径
  string strPath = this.FileUpload1.PostedFile.FileName.ToString ();
  //读取图片
  FileStream fs = new System.IO.FileStream(strPath, FileMode.Open, FileAccess.Read);
  BinaryReader br = new BinaryReader(fs);
  byte[] photo = br.ReadBytes((int)fs.Length);
  br.Close();
  fs.Close();
  //存入
  SqlConnection myConn = new SqlConnection("Data Source=.;Initial Catalog=stumanage;User ID=sa;Password=123");
  string strComm = " INSERT INTO stuInfo(stuid,stuimage) VALUES(107,@photoBinary )";//操作数据库语句根据需要修改
  SqlCommand myComm = new SqlCommand(strComm, myConn);
  myComm.Parameters.Add("@photoBinary", SqlDbType.Binary, photo.Length);
  myComm.Parameters["@photoBinary"].Value = photo;
  myConn.Open();
  if (myComm.ExecuteNonQuery() > 0)
  {
     this.Label1.Text = "ok";
  }
  myConn.Close();
  读取:
  ...连接数据库字符串省略
  mycon.Open();
  SqlCommand command = new
  SqlCommand("select stuimage from stuInfo where stuid=107", mycon);//查询语句根据需要修改
  byte[] image = (byte[])command.ExecuteScalar ();
  //指定从数据库读取出来的图片的保存路径及名字
  string strPath = "~/Upload/zhangsan.JPG";
  string strPhotoPath = Server.MapPath(strPath);
  //按上面的路径与名字保存图片文件
  BinaryWriter bw = new BinaryWriter(File.Open(strPhotoPath,FileMode.OpenOrCreate));
  bw.Write(image);
  bw.Close();
  //显示图片
  this.Image1.ImageUrl = strPath;

采用这两种方式可以根据实际需求灵活选择。

相关推荐:mysql教程

The above is the detailed content of How to store pictures in mysql. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn