如何使用 fileupload 插入数据库 sql server 这个

Question

Protected Sub btnUpload_Click(ByVal sender As Object, e As EventArgs) Handles btnUpload.Click
    Dim filePath As String = FileUpload.PostedFile.FileName
    Dim filePath2 As String = FileUploadImage.PostedFile.FileName
    Dim fileName As String = Path.GetFileName(filePath)
    Dim ext As String = Path.GetExtension(fileName)
    Dim contenttyppe As String = String.Empty
    Select Case ext
        Case ".pdf"
            ContentType = "application/pdf"
            Exit Select
        Case ".jpg"
            ContentType = "image/jpg"
            Exit Select
        Case ".pfx"
            ContentType = "image/pfx"
            Exit Select
        Case ".png"
            ContentType = "image/png"
            Exit Select
        Case ".gif"
            ContentType = "image/gif"
            Exit Select
        Case ".doc"
            ContentType = "application/vnd.ms-word"
            Exit Select
        Case ".docx"
            ContentType = "application/vnd.ms-word"
            Exit Select
        Case ".xls"
            ContentType = "application/vnd.ms-excel"
            Exit Select
        Case ".xlsx"
            ContentType = "application/vnd.ms-excel"
            Exit Select
        Case ".pfx"
            ContentType = "image/pfx"
            Exit Select
    End Select
    If contenttyppe <> String.Empty Then
        Dim fs As Stream = FileUpload.PostedFile.InputStream
        Dim fi As Stream = FileUploadImage.PostedFile.InputStream
        Dim br As New BinaryReader(fs)
        Dim br2 As New BinaryReader(fi)
        Dim bytes As Byte() = br.ReadBytes(fs.Length)
        Dim bytes2 As Byte() = br2.ReadBytes(fi.Length)
        Dim strQuery As String = "insert into APPUSERDTL (UID,APPCODE,APPEXPIRED,SIGNIMAGE, PFKFILE,HEADUID,PRINCIPALFROM,PRINCIPALTO,EXCEPTIONUSER,LastUpdate)" _
                            & "VALUES('',' ','','  @FileUpload  ','  @FileUploadImage','','','','','')"

        Dim cmd As New SqlCommand(strQuery)
        cmd.Parameters.Add("@UID", Data.SqlDbType.Int).Value = bytes
        cmd.Parameters.Add("@APPCODE", Data.SqlDbType.VarChar, 50).Value = bytes
        cmd.Parameters.Add("@APPEXPIRED", Data.SqlDbType.DateTime).Value = bytes
        cmd.Parameters.Add("@FileUpload", Data.SqlDbType.Image).Value = FileUpload
        cmd.Parameters.Add("@FileUploadImage", Data.SqlDbType.VarBinary).Value = FileUploadImage
        cmd.Parameters.Add("@HEADUID", Data.SqlDbType.Int).Value = bytes
        cmd.Parameters.Add("@PRINCIPALFROM", Data.SqlDbType.Money).Value = bytes
        cmd.Parameters.Add("@PRINCIPALTO", Data.SqlDbType.Money).Value = bytes
        cmd.Parameters.Add("@EXCEPTIONUSER", Data.SqlDbType.Bit).Value = bytes
        cmd.Parameters.Add("@LastUpdate", Data.SqlDbType.DateTime).Value = bytes
        InsertUpdateData(cmd)

        lblMsgUpload.ForeColor = System.Drawing.Color.Green
        lblMesgImage.ForeColor = System.Drawing.Color.Green
        lblMsgUpload.Text = "File Upload Successfully"
        lblMesgImage.Text = "File Upload Successfuly"

    Else
        lblMesgImage.ForeColor = System.Drawing.Color.Red
        lblMesgImage.Text = "File format not recognised." _
         & " Upload Image/Word/PDF/Excel formats"
    End If

    ' delete file upload
    Dim fullPath = MapPath("~/upload/") + fileName
    If System.IO.File.Exists(fullPath) Then
        System.IO.File.Delete(fullPath)
    End If
End Sub

================================================ ===

Public Function InsertUpdateData(ByVal cmd As SqlCommand) As Boolean
    '  Dim strConnString As New DBX
    Dim strConnString As String = System.Configuration.ConfigurationManager.ConnectionStrings("connection").ConnectionString
    Dim conn As New SqlConnection(strConnString)
    cmd.CommandType = CommandType.Text
    cmd.Connection = conn
    Try
        conn.Open()
        cmd.ExecuteNonQuery()
        Return True
    Catch ex As Exception
        Response.Write(ex.Message)
        Return False
    Finally
        conn.Close()
        conn.Dispose()

    End Try
End Function
End Class

Answer 1

查询文本中只有两个参数占位符（@FileUpload 和 @FileUploadImage）。然后，您为具有各种数据类型的每个字段定义参数，然后将它们全部设置为相同的值 (bytes)。最后，应该分隔值的逗号被错误地放置在查询文本中。难怪你 ExecuteNonQuery 不起作用

如果您不知道其他值，并且可以插入您的记录，将这些字段保留为默认值，您可以尝试使用上述查询的精简版本。否则，您需要知道要在其他字段中插入的实际值，并使用适当的变量初始化参数值。

Dim strQuery As String = "插入 APPUSERDTL (SIGNIMAGE,PKFILE,LastUpdate)" & _ "VALUES(@FileUpload,@FileUploadImage, GetDate())"

Dim cmd As New SqlCommand(strQuery)
cmd.Parameters.Add("@FileUpload", Data.SqlDbType.Image).Value = FileUpload
cmd.Parameters.Add("@FileUploadImage", Data.SqlDbType.VarBinary).Value = FileUploadImage
InsertUpdateData(cmd)

最后一点，当您遇到错误时，最好将错误消息添加到您的问题中。了解代码中发生的情况非常有帮助。