editbook.aspx.vb

图书借阅系统！ASP.NET实现的

Imports System.Data.SqlClient
Public Class EditBook
    Inherits System.Web.UI.Page

#Region " Web 窗体设计器生成的代码 "

    '该调用是 Web 窗体设计器所必需的。
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

    End Sub
    Protected WithEvents BookList As System.Web.UI.WebControls.ListBox
    Protected WithEvents txtBookName As System.Web.UI.WebControls.TextBox
    Protected WithEvents txtBookAuthor As System.Web.UI.WebControls.TextBox
    Protected WithEvents DpStyle As System.Web.UI.WebControls.DropDownList
    Protected WithEvents txtPubName As System.Web.UI.WebControls.TextBox
    Protected WithEvents txtSeries As System.Web.UI.WebControls.TextBox
    Protected WithEvents txtSubject As System.Web.UI.WebControls.TextBox
    Protected WithEvents DpLanguage As System.Web.UI.WebControls.DropDownList
    Protected WithEvents txtISBN As System.Web.UI.WebControls.TextBox
    Protected WithEvents txtUploadDate As System.Web.UI.WebControls.TextBox
    Protected WithEvents CompareValidator1 As System.Web.UI.WebControls.CompareValidator
    Protected WithEvents txtSearchNO As System.Web.UI.WebControls.TextBox
    Protected WithEvents txtPubDate As System.Web.UI.WebControls.TextBox
    Protected WithEvents CompareValidator2 As System.Web.UI.WebControls.CompareValidator
    Protected WithEvents DpBookState As System.Web.UI.WebControls.DropDownList
    Protected WithEvents ResetBtn As System.Web.UI.WebControls.LinkButton
    Protected WithEvents UpdateBtn As System.Web.UI.WebControls.LinkButton
    Protected WithEvents txtPrice As System.Web.UI.WebControls.TextBox
    Protected WithEvents Comparevalidator3 As System.Web.UI.WebControls.CompareValidator
    Protected WithEvents txtBarCode As System.Web.UI.WebControls.TextBox

    '注意: 以下占位符声明是 Web 窗体设计器所必需的。
    '不要删除或移动它。
    Private designerPlaceholderDeclaration As System.Object

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
        '不要使用代码编辑器修改它。
        InitializeComponent()
    End Sub

#End Region

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        '在此处放置初始化页的用户代码
        If Not IsPostBack Then
            BindData()
        End If
    End Sub
    Private Sub BindData()
        Dim obj As DBController = New DBController
        obj.BindListBox("select * from BookInfo order by BookID asc", BookList)
        obj.Close()
    End Sub

    Private Sub BookList_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles BookList.SelectedIndexChanged
        Dim BookID As String = BookList.SelectedValue.ToString.Trim
        Dim sqlstr As String = "select * from BookInfo where BookID =" + BookID
        Dim obj As DBController = New DBController
        obj.Open()
        Dim myreader As SqlDataReader = obj.ExecReaderSql(sqlstr)
        If myreader.Read Then
            txtBookName.Text = myreader("BookName")
            txtPubName.Text = myreader("PubName")
            txtBookAuthor.Text = myreader("BookAuthor")
            DpStyle.SelectedValue = myreader("BookStyle")
            txtUploadDate.Text = myreader("UploadDate")
            txtPubDate.Text = myreader("PubDate")
            txtSeries.Text = myreader("Series")
            txtSubject.Text = myreader("Subject")
            DpLanguage.SelectedValue = myreader("Language")
            txtISBN.Text = myreader("ISBN")
            txtSearchNO.Text = myreader("SearchNO")
            DpBookState.SelectedValue = myreader("BookState")
            txtPrice.Text = myreader("Price")
            txtBarCode.Text = myreader("BarCode")
        End If
        obj.Close()

    End Sub

    Private Sub UpdateBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles UpdateBtn.Click
        If BookList.SelectedIndex = -1 Then
            Return
        End If
        Dim obj As DBController = New DBController
        Dim sqlstr As String = ""
        sqlstr = "Update BookInfo"
        sqlstr += " set BookName='" + txtBookName.Text.ToString.Trim + "',"
        sqlstr += "PubName='" + txtPubName.Text.ToString.Trim + "',"
        sqlstr += "BookAuthor='" + txtBookAuthor.Text.ToString.Trim + "',"
        sqlstr += "BookStyle='" + DpStyle.SelectedValue.ToString.Trim + "',"
        sqlstr += "UploadDate='" + txtUploadDate.Text.ToString.Trim + "',"
        sqlstr += "Series='" + txtSeries.Text.ToString.Trim + "',"
        sqlstr += "Subject='" + txtSubject.Text.ToString.Trim + "',"
        sqlstr += "Language='" + DpLanguage.SelectedValue.ToString.Trim + "',"
        sqlstr += "ISBN='" + txtISBN.Text.ToString.Trim + "',"
        sqlstr += "SearchNO='" + txtSearchNO.Text.ToString.Trim + "',"
        sqlstr += "PubDate='" + txtPubDate.Text.ToString.Trim + "',"
        sqlstr += "BookState=" + DpBookState.SelectedValue.ToString.Trim + ","
        sqlstr += "Price=" + txtPrice.Text.ToString.Trim + ","
        sqlstr += "BarCode='" + txtBarCode.Text.ToString.Trim + "'"
        sqlstr += " where BookID=" + BookList.SelectedValue
        obj.Open()
        obj.ExecNonSql(sqlstr)
        obj.Close()
    End Sub
End Class