用mysql实现pdf文件在datagridview上的显示

CREATE TABLE pdf_files (
    id INT AUTO_INCREMENT PRIMARY KEY,
    file_name VARCHAR(255),
    file_type VARCHAR(255),
    file_content LONGBLOB
);

import mysql.connector

# 连接到MySQL数据库
cnx = mysql.connector.connect(user='your_username', password='your_password',
                              host='your_host', database='your_database')

# 读取PDF文件内容
with open('path_to_pdf_file.pdf', 'rb') as file:
    pdf_content = file.read()

# 插入PDF文件到数据库
cursor = cnx.cursor()
insert_query = "INSERT INTO pdf_files (file_name, file_type, file_content) VALUES (%s, %s, %s)"
file_data = ('pdf_file.pdf', 'application/pdf', pdf_content)
cursor.execute(insert_query, file_data)
cnx.commit()

# 关闭数据库连接
cursor.close()
cnx.close()

import mysql.connector

# 连接到MySQL数据库
cnx = mysql.connector.connect(user='your_username', password='your_password',
                              host='your_host', database='your_database')

# 查询PDF文件内容
cursor = cnx.cursor()
select_query = "SELECT file_content FROM pdf_files WHERE file_name = 'pdf_file.pdf'"
cursor.execute(select_query)
result = cursor.fetchone()

# 将PDF文件内容保存到本地
with open('path_to_save_pdf_file.pdf', 'wb') as file:
    file.write(result[0])

# 关闭数据库连接
cursor.close()
cnx.close()