students.vb

图书管理系统最新的

Imports System.Data.SqlClient

Public Class students
    Inherits System.Windows.Forms.Form

    Dim cn As New SqlConnection("server=localhost;database=lms;uid=sa;password=;")
    Dim da As SqlDataAdapter
    Dim ds As DataSet
    Dim cmd As SqlCommand
    Dim dv As DataView
    Dim ch As Char
    Dim i 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 GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents btn_add As System.Windows.Forms.Button
    Friend WithEvents btn_remove As System.Windows.Forms.Button
    Friend WithEvents lbl_year As System.Windows.Forms.Label
    Friend WithEvents lbl_contact As System.Windows.Forms.Label
    Friend WithEvents lbl_address As System.Windows.Forms.Label
    Friend WithEvents lbl_name As System.Windows.Forms.Label
    Friend WithEvents lbl_studid As System.Windows.Forms.Label
    Friend WithEvents btn_close As System.Windows.Forms.Button
    Friend WithEvents lbl_branch As System.Windows.Forms.Label
    Friend WithEvents cmb_branch As System.Windows.Forms.ComboBox
    Friend WithEvents txt_contact As System.Windows.Forms.TextBox
    Friend WithEvents txt_add As System.Windows.Forms.TextBox
    Friend WithEvents txt_name As System.Windows.Forms.TextBox
    Friend WithEvents txt_sid As System.Windows.Forms.TextBox
    Friend WithEvents cmb_year As System.Windows.Forms.ComboBox
    Friend WithEvents dg_stud As System.Windows.Forms.DataGrid
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents lbl_help As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.lbl_branch = New System.Windows.Forms.Label
        Me.cmb_branch = New System.Windows.Forms.ComboBox
        Me.cmb_year = New System.Windows.Forms.ComboBox
        Me.btn_add = New System.Windows.Forms.Button
        Me.btn_remove = New System.Windows.Forms.Button
        Me.lbl_year = New System.Windows.Forms.Label
        Me.txt_contact = New System.Windows.Forms.TextBox
        Me.lbl_address = New System.Windows.Forms.Label
        Me.txt_add = New System.Windows.Forms.TextBox
        Me.lbl_name = New System.Windows.Forms.Label
        Me.txt_name = New System.Windows.Forms.TextBox
        Me.txt_sid = New System.Windows.Forms.TextBox
        Me.lbl_studid = New System.Windows.Forms.Label
        Me.lbl_contact = New System.Windows.Forms.Label
        Me.btn_close = New System.Windows.Forms.Button
        Me.dg_stud = New System.Windows.Forms.DataGrid
        Me.Label1 = New System.Windows.Forms.Label
        Me.lbl_help = New System.Windows.Forms.Label
        Me.GroupBox1.SuspendLayout()
        CType(Me.dg_stud, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.lbl_help)
        Me.GroupBox1.Controls.Add(Me.lbl_branch)
        Me.GroupBox1.Controls.Add(Me.cmb_branch)
        Me.GroupBox1.Controls.Add(Me.cmb_year)
        Me.GroupBox1.Controls.Add(Me.btn_add)
        Me.GroupBox1.Controls.Add(Me.btn_remove)
        Me.GroupBox1.Controls.Add(Me.lbl_year)
        Me.GroupBox1.Controls.Add(Me.txt_contact)
        Me.GroupBox1.Controls.Add(Me.lbl_address)
        Me.GroupBox1.Controls.Add(Me.txt_add)
        Me.GroupBox1.Controls.Add(Me.lbl_name)
        Me.GroupBox1.Controls.Add(Me.txt_name)
        Me.GroupBox1.Controls.Add(Me.txt_sid)
        Me.GroupBox1.Controls.Add(Me.lbl_studid)
        Me.GroupBox1.Controls.Add(Me.lbl_contact)
        Me.GroupBox1.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.GroupBox1.ForeColor = System.Drawing.Color.Navy
        Me.GroupBox1.Location = New System.Drawing.Point(16, 32)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(280, 432)
        Me.GroupBox1.TabIndex = 0
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "Students Details"
        '
        'lbl_branch
        '
        Me.lbl_branch.AutoSize = True
        Me.lbl_branch.Location = New System.Drawing.Point(19, 304)
        Me.lbl_branch.Name = "lbl_branch"
        Me.lbl_branch.Size = New System.Drawing.Size(52, 17)
        Me.lbl_branch.TabIndex = 14
        Me.lbl_branch.Text = "Branch :"
        '
        'cmb_branch
        '
        Me.cmb_branch.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList
        Me.cmb_branch.Items.AddRange(New Object() {"Computer", "IT", "Entc", "Electronics", "Chemical", "Mechanical"})
        Me.cmb_branch.Location = New System.Drawing.Point(90, 304)
        Me.cmb_branch.MaxLength = 20
        Me.cmb_branch.Name = "cmb_branch"
        Me.cmb_branch.Size = New System.Drawing.Size(174, 21)
        Me.cmb_branch.TabIndex = 5
        '
        'cmb_year
        '
        Me.cmb_year.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList
        Me.cmb_year.Items.AddRange(New Object() {"F.E", "S.E", "T.E", "B.E"})
        Me.cmb_year.Location = New System.Drawing.Point(90, 264)
        Me.cmb_year.MaxLength = 4
        Me.cmb_year.Name = "cmb_year"
        Me.cmb_year.Size = New System.Drawing.Size(174, 21)
        Me.cmb_year.TabIndex = 4
        '
        'btn_add
        '
        Me.btn_add.Font = New System.Drawing.Font("Tahoma", 9.0!, 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(56, 360)
        Me.btn_add.Name = "btn_add"
        Me.btn_add.TabIndex = 6
        Me.btn_add.Text = "&Add"
        '
        'btn_remove
        '
        Me.btn_remove.Font = New System.Drawing.Font("Tahoma", 9.0!, 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(144, 360)
        Me.btn_remove.Name = "btn_remove"
        Me.btn_remove.TabIndex = 7
        Me.btn_remove.Text = "&Remove"
        '
        'lbl_year
        '
        Me.lbl_year.AutoSize = True
        Me.lbl_year.Location = New System.Drawing.Point(17, 264)
        Me.lbl_year.Name = "lbl_year"
        Me.lbl_year.Size = New System.Drawing.Size(38, 17)
        Me.lbl_year.TabIndex = 4
        Me.lbl_year.Text = "Year :"
        '
        'txt_contact
        '
        Me.txt_contact.Location = New System.Drawing.Point(90, 224)
        Me.txt_contact.MaxLength = 15
        Me.txt_contact.Name = "txt_contact"
        Me.txt_contact.Size = New System.Drawing.Size(174, 21)
        Me.txt_contact.TabIndex = 3
        Me.txt_contact.Text = ""
        '
        'lbl_address
        '
        Me.lbl_address.AutoSize = True
        Me.lbl_address.Location = New System.Drawing.Point(16, 120)
        Me.lbl_address.Name = "lbl_address"
        Me.lbl_address.Size = New System.Drawing.Size(60, 17)
        Me.lbl_address.TabIndex = 2
        Me.lbl_address.Text = "Address : "
        '
        'txt_add
        '
        Me.txt_add.Location = New System.Drawing.Point(90, 120)
        Me.txt_add.MaxLength = 200
        Me.txt_add.Multiline = True
        Me.txt_add.Name = "txt_add"
        Me.txt_add.Size = New System.Drawing.Size(174, 84)
        Me.txt_add.TabIndex = 2
        Me.txt_add.Text = ""
        '
        'lbl_name
        '
        Me.lbl_name.AutoSize = True
        Me.lbl_name.Location = New System.Drawing.Point(16, 80)
        Me.lbl_name.Name = "lbl_name"
        Me.lbl_name.Size = New System.Drawing.Size(48, 17)
        Me.lbl_name.TabIndex = 1
        Me.lbl_name.Text = "Name : "
        '
        'txt_name
        '
        Me.txt_name.Location = New System.Drawing.Point(90, 80)
        Me.txt_name.MaxLength = 50
        Me.txt_name.Name = "txt_name"
        Me.txt_name.Size = New System.Drawing.Size(174, 21)
        Me.txt_name.TabIndex = 1
        Me.txt_name.Text = ""
        '
        'txt_sid
        '
        Me.txt_sid.Location = New System.Drawing.Point(90, 40)
        Me.txt_sid.MaxLength = 6
        Me.txt_sid.Name = "txt_sid"
        Me.txt_sid.Size = New System.Drawing.Size(88, 21)
        Me.txt_sid.TabIndex = 0
        Me.txt_sid.Text = ""
        '
        'lbl_studid
        '
        Me.lbl_studid.AutoSize = True
        Me.lbl_studid.Location = New System.Drawing.Point(16, 40)
        Me.lbl_studid.Name = "lbl_studid"
        Me.lbl_studid.Size = New System.Drawing.Size(76, 17)
        Me.lbl_studid.TabIndex = 0
        Me.lbl_studid.Text = "Student Id : "
        '
        'lbl_contact
        '
        Me.lbl_contact.AutoSize = True
        Me.lbl_contact.Location = New System.Drawing.Point(16, 226)
        Me.lbl_contact.Name = "lbl_contact"
        Me.lbl_contact.Size = New System.Drawing.Size(78, 17)
        Me.lbl_contact.TabIndex = 3
        Me.lbl_contact.Text = "Contact No : "
        '
        'btn_close
        '
        Me.btn_close.Font = New System.Drawing.Font("Tahoma", 8.25!, CType((System.Drawing.FontStyle.Bold Or System.Drawing.FontStyle.Underline), System.Drawing.FontStyle), System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.btn_close.Location = New System.Drawing.Point(712, 480)
        Me.btn_close.Name = "btn_close"
        Me.btn_close.Size = New System.Drawing.Size(72, 24)
        Me.btn_close.TabIndex = 8
        Me.btn_close.Text = "Close"
        '
        'dg_stud
        '
        Me.dg_stud.AlternatingBackColor = System.Drawing.Color.LightGray
        Me.dg_stud.BackColor = System.Drawing.Color.Gainsboro
        Me.dg_stud.BackgroundColor = System.Drawing.Color.Silver
        Me.dg_stud.CaptionBackColor = System.Drawing.Color.LightSteelBlue
        Me.dg_stud.CaptionForeColor = System.Drawing.Color.MidnightBlue
        Me.dg_stud.CaptionText = "Students Information"
        Me.dg_stud.DataMember = ""
        Me.dg_stud.FlatMode = True
        Me.dg_stud.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.dg_stud.ForeColor = System.Drawing.Color.Black
        Me.dg_stud.GridLineColor = System.Drawing.Color.White
        Me.dg_stud.HeaderBackColor = System.Drawing.Color.MidnightBlue
        Me.dg_stud.HeaderFont = New System.Drawing.Font("Tahoma", 8.0!, System.Drawing.FontStyle.Bold)
        Me.dg_stud.HeaderForeColor = System.Drawing.Color.White
        Me.dg_stud.LinkColor = System.Drawing.Color.White
        Me.dg_stud.Location = New System.Drawing.Point(312, 40)
        Me.dg_stud.Name = "dg_stud"
        Me.dg_stud.ParentRowsBackColor = System.Drawing.Color.DarkGray
        Me.dg_stud.ParentRowsForeColor = System.Drawing.Color.Black
        Me.dg_stud.ReadOnly = True
        Me.dg_stud.SelectionBackColor = System.Drawing.Color.CadetBlue
        Me.dg_stud.SelectionForeColor = System.Drawing.Color.White
        Me.dg_stud.Size = New System.Drawing.Size(472, 424)
        Me.dg_stud.TabIndex = 9
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label1.ForeColor = System.Drawing.Color.Blue
        Me.Label1.Location = New System.Drawing.Point(312, 24)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(160, 17)
        Me.Label1.TabIndex = 11
        Me.Label1.Text = "Select the student record : "
        '
        'lbl_help
        '
        Me.lbl_help.AutoSize = True
        Me.lbl_help.Cursor = System.Windows.Forms.Cursors.Hand
        Me.lbl_help.Font = New System.Drawing.Font("Microsoft Sans Serif", 9.0!, System.Drawing.FontStyle.Underline, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.lbl_help.ForeColor = System.Drawing.Color.Blue
        Me.lbl_help.Location = New System.Drawing.Point(183, 408)
        Me.lbl_help.Name = "lbl_help"
        Me.lbl_help.Size = New System.Drawing.Size(91, 17)
        Me.lbl_help.TabIndex = 15
        Me.lbl_help.Text = "How to update?"
        '
        'students