在C#中上传图片 [英] upload picture in c#

问题描述

请提供代码以通过c#中的图片框上传和保存图片..
这是我上传的代码，但是出现异常处理错误，请帮帮我..

please give the code for upload and save picture through picturebox in c#..
this is the code for upload which i made but exception handling error comes please help me out..

private void btnupload_Click(object sender, EventArgs e)
    {
      try
      {
        openFileDialog1.ShowDialog(this);
        openFileDialog1.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp)|*.jpg; *.jpeg; *.gif; *.bmp";
        
        byte[] image;
 
        string fileName =openFileDialog1.FileName;
 
        FileStream fs = new FileStream(fileName, FileMode.Open);
        BinaryReader reader = new BinaryReader(fs);
        image = reader.ReadBytes((int)fs.Length);
        fs.Close();
 
        SqlConnection conn = new SqlConnection("connectionString");
        conn.Open();
        string query = "Insert into pictures (name,images) values(@name,@images)";
 
        SqlCommand comm = new SqlCommand(query, conn);
        comm.Parameters.AddWithValue("name", Path.GetFileName(strFn).ToString());
 
        comm.Parameters.AddWithValue("images", image);
 
        comm.ExecuteNonQuery();
        MessageBox.Show("Record Added");
 
        conn.Close();
        bind();
        pictureBox1.Image = new Bitmap(strFn);
      
      }
      catch (Exception)
      {
        throw new ApplicationException("Failed loading image");
      }     
    }

感谢

thanks

推荐答案

您发送的邮件

Your sending

  comm.Parameters.AddWithValue("name", Path.GetFileName(strFn).ToString());

You should send string fileName; 

尝试

byte[] ReadFile(string sPath)
       {
           //Initialize byte array with a null value initially.
           byte[] data = null;
           //Use FileInfo object to get file size.
           FileInfo fInfo = new FileInfo(sPath);
           long numBytes = fInfo.Length;
           //Open FileStream to read file
           FileStream fStream = new FileStream(sPath, FileMode.Open, FileAccess.Read);
           //Use BinaryReader to read file stream into byte array.
           BinaryReader br = new BinaryReader(fStream);
           //When you use BinaryReader, you need to supply number of bytes to read from file.
           //In this case we want to read entire file. So supplying total number of bytes.
           data = br.ReadBytes((int)numBytes);
           return data;
       }

在buttonupload的点击事件中尝试

at click event of buttonupload try

byte[] imageData = ReadFile(openFileDialog1.FileName);

并将这些imagedata值作为
传递给sqlcommand参数

and pass these imagedata value to sqlcommand parameter as

comm.Parameters.AddWithValue("images",(object)imageData);

这篇关于在C#中上传图片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！