图片以字节数组的形式存到数据库_图片以字节数组的形式保存在数据库-优快云博客

本文介绍了一个使用ASP.NET实现文件上传功能的例子，并演示了如何将上传的文件存储到数据库中。具体包括：默认页面的布局代码、按钮点击事件处理、文件数据插入数据库的方法以及从数据库读取文件数据并返回的过程。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void insert(byte[] b)
    {
        string connString = "server=.;database=pubs;uid=sa;pwd=";
        using (SqlConnection conn = new SqlConnection(connString))
        {
            conn.Open();
            using (SqlCommand comm = new SqlCommand())
            {
                comm.Connection = conn;
                comm.CommandType = CommandType.Text;
                comm.CommandText = "insert into photo values (@pimage)";
                comm.Parameters.AddWithValue("@pimage",b);
                int n = comm.ExecuteNonQuery();
                if (n == 1)
                {
                    Label1.Text = "添加成功";
                }
                else
                {
                    Label1.Text = "添加失败";
                }
            }
            conn.Close();
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        byte[] b = FileUpload1.FileBytes;
        insert(b);

        string connString = "server=.;database=pubs;uid=sa;pwd=";
        using (SqlConnection conn = new SqlConnection(connString))
        {

            conn.Open();
            using (SqlCommand comm = new SqlCommand())
            {
                comm.Connection = conn;
                comm.CommandType = CommandType.Text;
                comm.CommandText = "select pimage from photo where pid=2";