Question

该项目是vb和mysql中家庭安全系统的面部和密码识别问题，问题是如何在db中为用户存储面部图像识别器部分，顺便说一下我为它编写代码，但我不知道什么是无法保存图片的问题。

公共类中的此代码

Dim ds As DataSet
Dim da As MySqlDataAdapter
Dim dbCon As MySqlConnection
Dim COMMAND As MySqlCommand
Dim dr As MySqlDataReader

这个添加按钮的代码实际上是函数

    Dim FileSize As UInt32
    Dim rawData() As Byte

    Dim dbCon As New MySqlConnection("Server = 127.0.0.1; database=database; uid= root; pwd= 6404")


    dbCon.Open()
    dbCon.ChangeDatabase("psdb")


    Dim COMMAND As New MySqlCommand("SELECT actor_pic, filesize, filename FROM actors WHERE actor_name = ?autoid", dbCon )
    COMMAND.Parameters.AddWithValue("?autoid", txtname.Text)
    dr = COMMAND.ExecuteReader
    dr.Read()

    'data is in memory 

    FileSize = dr.GetUInt32(dr.GetOrdinal("filesize"))
    rawData = New Byte(FileSize) {}

    'get the bytes and filesize 

    dr.GetBytes(dr.GetOrdinal("actor_pic"), 0, rawData, 0, FileSize)

    Dim ad As New System.IO.MemoryStream(100000)
    ' Dim bm As New Bitmap

    ad.Write(rawData, 0, FileSize)

    dr.Close()
    dbCon.Close()
    dbCon.Dispose()

    ad.Dispose()




    DataGridView1.Rows.Add()
    DataGridView1.Rows(DataGridView1.Rows.Count - 1).Cells(0).Value = imagez.ToBitmap
    DataGridView1.Rows(DataGridView1.Rows.Count - 1).Height = DataGridView1.Columns(0).Width * 0.75
    ' the 0.75 * width for the height keeps it at 4:3 aspect ratio, so it looks normal.
    DataGridView1.Rows(DataGridView1.Rows.Count - 1).Cells(1).Value = "image" & DataGridView1.Rows.Count - 1

家庭安全系统的人脸识别

0 个答案: