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Managing Attendance Data with ListView in Windows Forms: A Complete Guide

This guide explores the implementation of a ListView in a Windows Forms application, focusing on attendance data management. The program allows users to input student names, classes, and attendance percentages. Key functionalities include adding records, displaying saved entries, searching for specific students, and validating input data to ensure percentages are within the range of 0-100. Additionally, it provides methods for clearing all entries and notifying users about any errors during data entry. Ideal for developers looking to enhance their Windows Forms applications.

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Managing Attendance Data with ListView in Windows Forms: A Complete Guide

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  1. Object Listview dalam Windows Form. Arfansyah, M.Kom

  2. Listview • Listview : digunakan untuk menampilkan data yang bentuknya jamak.

  3. Public Class Form1 Dim nomor As Integer Sub Bersih() txtNama.Text = "" txtKelas.Text = "" txtPersen.Text = "" End Sub Sub Tampilkan(ByVal No As Integer) txtNama.Text = LVAbsen.Items(No).SubItems(0).Text txtKelas.Text = LVAbsen.Items(No).SubItems(1).Text txtPersen.Text = LVAbsen.Items(No).SubItems(2).Text End Sub Private Sub form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load LVAbsen.Columns.Add("Nama", 200, HorizontalAlignment.Left) LVAbsen.Columns.Add("Kelas", 100, HorizontalAlignment.Center) LVAbsen.Columns.Add("Persentase", 120, HorizontalAlignment.Center) End Sub

  4. Private Sub btnSimpan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSimpan.Click nomor = LVAbsen.Items.Count LVAbsen.Items.Add(txtNama.Text) LVAbsen.Items(nomor).SubItems.Add(txtKelas.Text) LVAbsen.Items(nomor).SubItems.Add(txtPersen.Text) End Sub Private Sub btnCari_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCari.Click Dim Cari As String Cari = InputBox("Masukkan Nama Mahasiswanya = ", "Masukkan Nama") For a As Integer = 0 To LVAbsen.Items.Count - 1 If LVAbsen.Items(a).SubItems(0).Text.ToUpper = Cari.ToUpper Then Tampilkan(a) Exit Sub End If Next a MessageBox.Show("Data tidak ditemukan ", "Maaf tidak ketemu") End Sub Private Sub btnHapusSemua_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnHapusSemua.Click LVAbsen.Items.Clear() Bersih() End Sub

  5. Private Sub txtPersen_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtPersen.KeyPress If Not (Char.IsNumber(e.KeyChar) Or Char.IsControl(e.KeyChar)) Then e.Handled = True MessageBox.Show("Masukkan nilai angka 0-100", "Terima Kasih") End If End Sub Private Sub txtPersen_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtPersen.TextChanged If Not (Val(txtPersen.Text) >= 0 And Val(txtPersen.Text) <= 100) Then MessageBox.Show("Masukkan nilai angka 0-100", "Terima Kasih") txtPersen.Text = "" End If End Sub End Class

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