Question

这是我的代码

    Dim Cmd As New OleDbCommand

    Dim strsql As String

    Try
        Dim fsreader As New FileStream(OpenFile.FileName, FileMode.Open, FileAccess.Read)
        Dim breader As New BinaryReader(fsreader)
        Dim imgbuffer(fsreader.Length) As Byte
        breader.Read(imgbuffer, 0, fsreader.Length)
        fsreader.Close()

        strsql = "UPDATE AccResult SET (PicFile, PicName) Values (@pfile, @pname) WHERE StudNo = '" & Form1.sNo.Text & "'"
        Cmd = New OleDbCommand(strsql, con)
        Cmd.Parameters.AddWithValue("@pfile", txtSave.Text)
        Cmd.Parameters.AddWithValue("@pname", imgbuffer)
        Cmd.ExecuteNonQuery()
        Cmd.Dispose()
    Catch ex As Exception

    End Try

请帮助我如何在数据库中保存图片时更新学生数据。即时通讯使用VB.NET。谢谢。

Answer 1

看起来像是逻辑上的简单错误-您的文件名与文件内容相反

Cmd.Parameters.AddWithValue("@pfile", txtSave.Text)
Cmd.Parameters.AddWithValue("@pname", imgbuffer)

应该是

Cmd.Parameters.AddWithValue("@pfile", imgbuffer)
Cmd.Parameters.AddWithValue("@pname", txtSave.Text)

使用MS Access更新数据库中的图像文件

1 个答案: