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How to store pictures in mysql

王林
Release: 2020-10-15 11:06:11
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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;
  }
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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;
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采用这两种方式可以根据实际需求灵活选择。

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