⭐ 欢迎来到虫虫下载站! | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站

📄 options.vb

📁 图书管理系统最新的
💻 VB
字号:
Imports System.Data.SqlClient

Public Class options
    Inherits System.Windows.Forms.Form
    Dim cn As New SqlConnection("server=localhost;database=lms;uid=sa;password=;")
    Dim cmd As SqlCommand
    Dim f_charge As Integer
#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    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

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents btn_add As System.Windows.Forms.Button
    Friend WithEvents btn_remove As System.Windows.Forms.Button
    Friend WithEvents lbl_name As System.Windows.Forms.Label
    Friend WithEvents txt_name As System.Windows.Forms.TextBox
    Friend WithEvents lbl_studid As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents txt_charge As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.btn_add = New System.Windows.Forms.Button
        Me.btn_remove = New System.Windows.Forms.Button
        Me.lbl_name = New System.Windows.Forms.Label
        Me.txt_name = New System.Windows.Forms.TextBox
        Me.lbl_studid = New System.Windows.Forms.Label
        Me.txt_charge = New System.Windows.Forms.TextBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'btn_add
        '
        Me.btn_add.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.btn_add.ForeColor = System.Drawing.SystemColors.ControlText
        Me.btn_add.Location = New System.Drawing.Point(64, 96)
        Me.btn_add.Name = "btn_add"
        Me.btn_add.Size = New System.Drawing.Size(56, 23)
        Me.btn_add.TabIndex = 21
        Me.btn_add.Text = "OK"
        '
        'btn_remove
        '
        Me.btn_remove.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.btn_remove.ForeColor = System.Drawing.SystemColors.ControlText
        Me.btn_remove.Location = New System.Drawing.Point(136, 96)
        Me.btn_remove.Name = "btn_remove"
        Me.btn_remove.Size = New System.Drawing.Size(56, 23)
        Me.btn_remove.TabIndex = 22
        Me.btn_remove.Text = "Cancel"
        '
        'lbl_name
        '
        Me.lbl_name.AutoSize = True
        Me.lbl_name.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.lbl_name.ForeColor = System.Drawing.Color.Navy
        Me.lbl_name.Location = New System.Drawing.Point(24, 58)
        Me.lbl_name.Name = "lbl_name"
        Me.lbl_name.Size = New System.Drawing.Size(95, 17)
        Me.lbl_name.TabIndex = 20
        Me.lbl_name.Text = "Books Allowed :"
        '
        'txt_name
        '
        Me.txt_name.Enabled = False
        Me.txt_name.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.txt_name.Location = New System.Drawing.Point(120, 56)
        Me.txt_name.Name = "txt_name"
        Me.txt_name.Size = New System.Drawing.Size(48, 21)
        Me.txt_name.TabIndex = 19
        Me.txt_name.Text = "1"
        '
        'lbl_studid
        '
        Me.lbl_studid.AutoSize = True
        Me.lbl_studid.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.lbl_studid.ForeColor = System.Drawing.Color.Navy
        Me.lbl_studid.Location = New System.Drawing.Point(24, 27)
        Me.lbl_studid.Name = "lbl_studid"
        Me.lbl_studid.Size = New System.Drawing.Size(85, 17)
        Me.lbl_studid.TabIndex = 17
        Me.lbl_studid.Text = "Fine Charges :"
        '
        'txt_charge
        '
        Me.txt_charge.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.txt_charge.Location = New System.Drawing.Point(120, 24)
        Me.txt_charge.Name = "txt_charge"
        Me.txt_charge.Size = New System.Drawing.Size(48, 21)
        Me.txt_charge.TabIndex = 18
        Me.txt_charge.Text = "1"
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label1.Location = New System.Drawing.Point(168, 28)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(71, 17)
        Me.Label1.TabIndex = 23
        Me.Label1.Text = "Rs. per day."
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label2.Location = New System.Drawing.Point(168, 61)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(74, 17)
        Me.Label2.TabIndex = 24
        Me.Label2.Text = "Per student."
        '
        'options
        '
        Me.AcceptButton = Me.btn_add
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.BackColor = System.Drawing.Color.Silver
        Me.ClientSize = New System.Drawing.Size(264, 141)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.btn_add)
        Me.Controls.Add(Me.btn_remove)
        Me.Controls.Add(Me.lbl_name)
        Me.Controls.Add(Me.txt_name)
        Me.Controls.Add(Me.lbl_studid)
        Me.Controls.Add(Me.txt_charge)
        Me.MaximizeBox = False
        Me.MinimizeBox = False
        Me.Name = "options"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "Options"
        Me.ResumeLayout(False)

    End Sub

#End Region


    Private Sub btn_add_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_add.Click

        cmd = New SqlCommand
        cmd.Connection = cn
        cmd.CommandText = "delete from options;insert into options values(" & txt_charge.Text & ",1)"
        cmd.ExecuteNonQuery()
        cmd.Dispose()
        MessageBox.Show("Fine Charge successfully changed!!", "LMS", MessageBoxButtons.OK, MessageBoxIcon.Information)
        Me.Close()

    End Sub

    Private Sub btn_remove_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_remove.Click
        Me.Close()
    End Sub

    Private Sub options_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Me.Show()
        Application.DoEvents()

        Try
            cn.Open()

            cmd = New SqlCommand
            With cmd
                .Connection = cn
                .CommandText = "select F_Charge from options"
            End With

            ' storing fine charge in a variable
            f_charge = CType(cmd.ExecuteScalar, Integer)

            txt_charge.Text = f_charge


        Catch ex As SqlException
            MessageBox.Show(ex.Message, "LMS", MessageBoxButtons.OK, MessageBoxIcon.Error)
            cmd = Nothing
        End Try
    End Sub


    Private Sub options_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
        cn.Close()
    End Sub
End Class

⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -