12/08/20

list data pada sqLite

     Public Sub NilMahasiswa()

        Dim sqlite_conn As SQLiteConnection

        sqlite_conn = New SQLiteConnection("Data Source=D:\sqlite\jajal.db;Version=3;New=True;Compress=True;")


        ' open the connection:

        sqlite_conn.Open()

        Using cmd As New SQLiteCommand(sqlite_conn)

            cmd.CommandText = "SELECT npm,nama,uts,uas,total,nilai,prosen,tanggalEntryNilai FROM krs011 where npm='" & npm.Text & "' and kode_kul='" & downloadMATAKULIAH.kode_kul.Text & "' and kelas='" & downloadMATAKULIAH.kelas.Text & "';"

            Dim rdrMataKuliah As SQLiteDataReader = cmd.ExecuteReader()

            Using rdrMataKuliah

                While (rdrMataKuliah.Read())

                    npm.Text = rdrMataKuliah.GetString(0)

                    nama.Text = rdrMataKuliah.GetString(1)

                    presensi.Text = rdrMataKuliah.GetValue(6)

                    uts.Text = Replace(rdrMataKuliah.GetValue(2), ",", ".")

                    uas.Text = Replace(rdrMataKuliah.GetValue(3), ",", ".")

                    nilai.Text = rdrMataKuliah.GetString(5)

                    total.Text = Replace(rdrMataKuliah.GetValue(4), ",", ".")



                    If Trim(rdrMataKuliah.GetValue(7).ToString) = "" Then

                        terakhirDiUpdate.Text = "NULL"

                    Else

                        terakhirDiUpdate.Text = "Tanggal Update Terakhir : " & Replace(rdrMataKuliah.GetDateTime(7), ",", ".")

                    End If


                End While

            End Using

        End Using


    End Sub

memeriksa suatu record pada field yang bernilai KOSONG di VB.NET 2019

vNilaiField=Trim(rdrMataKuliah.GetValue(7).ToString) 

maka nilai dari variabel vNilaiField adalah kosong

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