bookadd.vb

图书管理系统

Imports System.Data.Sqlclient
Public Class BookAdd
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写 dispose 以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents TextBox4 As System.Windows.Forms.TextBox
    Friend WithEvents Label5 As System.Windows.Forms.Label
    Friend WithEvents TextBox5 As System.Windows.Forms.TextBox
    Friend WithEvents Label6 As System.Windows.Forms.Label
    Friend WithEvents TextBox6 As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label2 = New System.Windows.Forms.Label
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.TextBox4 = New System.Windows.Forms.TextBox
        Me.Label5 = New System.Windows.Forms.Label
        Me.TextBox5 = New System.Windows.Forms.TextBox
        Me.Label6 = New System.Windows.Forms.Label
        Me.TextBox6 = New System.Windows.Forms.TextBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(56, 40)
        Me.Label2.Name = "Label2"
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "书籍名称"
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(200, 40)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(160, 21)
        Me.TextBox2.TabIndex = 3
        Me.TextBox2.Text = ""
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(56, 96)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(104, 23)
        Me.Label3.TabIndex = 4
        Me.Label3.Text = "作    者"
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(200, 88)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.Size = New System.Drawing.Size(160, 21)
        Me.TextBox3.TabIndex = 5
        Me.TextBox3.Text = ""
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(56, 144)
        Me.Label4.Name = "Label4"
        Me.Label4.TabIndex = 6
        Me.Label4.Text = "出 版 社"
        '
        'TextBox4
        '
        Me.TextBox4.Location = New System.Drawing.Point(200, 136)
        Me.TextBox4.Name = "TextBox4"
        Me.TextBox4.Size = New System.Drawing.Size(160, 21)
        Me.TextBox4.TabIndex = 7
        Me.TextBox4.Text = ""
        '
        'Label5
        '
        Me.Label5.Location = New System.Drawing.Point(56, 192)
        Me.Label5.Name = "Label5"
        Me.Label5.TabIndex = 8
        Me.Label5.Text = "书籍定价"
        '
        'TextBox5
        '
        Me.TextBox5.Location = New System.Drawing.Point(200, 184)
        Me.TextBox5.Name = "TextBox5"
        Me.TextBox5.Size = New System.Drawing.Size(160, 21)
        Me.TextBox5.TabIndex = 9
        Me.TextBox5.Text = ""
        '
        'Label6
        '
        Me.Label6.Location = New System.Drawing.Point(56, 248)
        Me.Label6.Name = "Label6"
        Me.Label6.TabIndex = 10
        Me.Label6.Text = "出版日期"
        '
        'TextBox6
        '
        Me.TextBox6.Location = New System.Drawing.Point(200, 248)
        Me.TextBox6.Name = "TextBox6"
        Me.TextBox6.Size = New System.Drawing.Size(160, 21)
        Me.TextBox6.TabIndex = 11
        Me.TextBox6.Text = ""
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(80, 304)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 12
        Me.Button1.Text = "增加"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(192, 304)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 13
        Me.Button2.Text = "清空"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(296, 304)
        Me.Button3.Name = "Button3"
        Me.Button3.TabIndex = 14
        Me.Button3.Text = "取消"
        '
        'BookAdd
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.SystemColors.ActiveBorder
        Me.ClientSize = New System.Drawing.Size(456, 365)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox6)
        Me.Controls.Add(Me.Label6)
        Me.Controls.Add(Me.TextBox5)
        Me.Controls.Add(Me.Label5)
        Me.Controls.Add(Me.TextBox4)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.TextBox3)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.Label2)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog
        Me.MaximizeBox = False
        Me.Name = "BookAdd"
        Me.Text = "新增书籍"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Private Sub ClearData()
        '清空各个控件数据的过程

        TextBox2.Text = ""
        TextBox3.Text = ""
        TextBox4.Text = ""
        TextBox5.Text = ""
        TextBox6.Text = ""
    End Sub
    Private Function CheckData() As Boolean
        '检查数据合法性的过程
        If TextBox2.Text = "" Then
            MessageBox.Show("书籍名称选相不能为空!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            Return False
        End If
        If TextBox3.Text = "" Then
            MessageBox.Show("作者选项不能为空!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            Return False
        End If
        If TextBox4.Text = "" Then
            MessageBox.Show("出版社选相不能为空!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            Return False
        End If
        If TextBox5.Text = "" Then
            MessageBox.Show("书籍定价不能为空!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            Return False
        Else
            If IsNumeric(TextBox5.Text) = False Then
                MessageBox.Show("输入的书籍定价不是整数!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
                Return False
            End If
        End If
        If TextBox6.Text = "" Then
            MessageBox.Show("日期选项不能为空!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            Return False
        Else
            If IsDate(TextBox6.Text) = False Then '判断当前超过当前日期
                MessageBox.Show("输入的日期格式不正确!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
                TextBox6.Text = ""
                Return False
            End If
        End If
        Return True
    End Function


    Private Sub BookAdd_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ClearData()
        TextBox2.Focus()
    End Sub

    Private Sub TextBox6_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox6.KeyPress
        If Asc(e.KeyChar) = System.Windows.Forms.Keys.Enter Then
            Button1.PerformClick()
        End If
    End Sub
    Private Function GetHeightID() As Integer
        '定义一个函数获取其最大的ID号
        If mycon.State = ConnectionState.Closed Then
            mycon.Open()
        End If
        Dim Id As Integer
        Dim myset1 As New DataSet
        Dim myda1 As New SqlDataAdapter("select ID,Name,Anchor,Publisher,Price,PublishDate from Book", mycon)
        myda1.Fill(myset1, "Book")
        If myset1 Is Nothing OrElse myset1.Tables("Book").Rows.Count = 0 Then
            Id = 1
            Return Id
        Else
            '得到最大的ID
            Id = myset1.Tables("Book").Rows(myset1.Tables("Book").Rows.Count - 1).Item("ID")
            Return Id
        End If
    End Function


    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        '增加书籍按钮的代码
        '首先检验数据的合法性
        If CheckData() = False Then
            Exit Sub
        End If
        Try
            If mycon.State = ConnectionState.Closed Then
                mycon.Open()
            End If
            Dim ID As Integer
            ID = GetHeightID()
            Dim ID1 As New SqlParameter("@ID1", SqlDbType.Int, 4)
            ID1.Value = ID + 1
            Dim sqlstr As String = "insert into Book values(@ID1,'" & TextBox2.Text & "','" & TextBox3.Text & "','" & TextBox4.Text & "','" & TextBox5.Text & "','" & TextBox6.Text & "',1)"
            Dim mycom As New SqlCommand(sqlstr, mycon)
            mycom.Parameters.Add(ID1)
            mycom.ExecuteNonQuery()
            MessageBox.Show("恭喜你，保存成功！", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Information)
            Call ClearData()
            mycon.Close()
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        '退出按钮的代码 
        ClearData()
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        '取消按钮的代码
        Me.Close()
    End Sub

    Private Sub Label6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label6.Click

    End Sub
End Class