如何将图片以Image类型存储到数据库 (asp.net) 如何从数据库中读取Image类型的字段(asp.net)

将图片以Image类型存储到数据库中，首先获取图片的流对象，然后，利通Read方法从图片文件读取二进制数据存储到字节数组。

从数据库中读取Image类型的字段，首先将数据库对应的Image类型字段存储在无符号直接数组，然后再用MemoryStream类读入图片数据 

protected void btnSave_Click(object sender, EventArgs e)

    {

        try

        {

            string imagePath = FileUpload1.FileName;

            string imageExtend = imagePath.Substring(imagePath.LastIndexOf(".") + 1);

            int fileLength = FileUpload1.PostedFile.ContentLength;

            byte[] data = new byte[fileLength];

            HttpPostedFile hp = FileUpload1.PostedFile;

            using (Stream sr = hp.InputStream)

            {

                sr.Read(data, 0, fileLength);

                SqlConnection con = new SqlConnection("server=.;user id=sa; pwd=123;database=db_Data");

                con.Open();

                SqlCommand cmd = new SqlCommand("INSERT INTO [Table1]([name]) VALUES(@image)", con);

                cmd.Parameters.Add("@image", SqlDbType.Image);

                cmd.Parameters["@image"].Value = data;

                cmd.ExecuteNonQuery();

                Label1.Text = "Save Succeful";

            }

        }

        catch (Exception ex)

        {

            Label1.Text = ex.Message;

        }

    }

    protected void btnLoad_Click(object sender, EventArgs e)

    {

        try

        {

            using (SqlConnection con = new SqlConnection("server=.;user id=sa; pwd=123;database=db_Data"))

            {

                SqlDataAdapter ap = new SqlDataAdapter("select top 1 * from [Table1]order by ID desc", con);

                DataSet ds = new DataSet();

                ap.Fill(ds);

                byte[] data = (byte[])ds.Tables[0].Rows[0]["name"];

                MemoryStream ms = new MemoryStream(data);

                Response.Clear();

                Response.ContentType = "image/GIF";

                Response.BinaryWrite(ms.ToArray());

                Label1.Text = "Load Succeful";

            }

        }

        catch (Exception ex)

        {

            Label1.Text = ex.Message;

        }

    }