Mantenimiento y Filtrado de Registros

7/23/2019 Mantenimiento y Filtrado de Registros

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INSTITUTO DE EDUCACIÓN SUPERIOR PÚBLICO Computación e Informática“DAVID SÁNCHEZ INFANTE” Unidad Didáctica: Programación Concurrente

Prof. Roni Aguilar Huaccha 1 San Pedro de Lloc

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MANTENIMIENTO Y FILTRADO DE REGISTROS

ESCRIBIR EL SIGUIENTE CÓDIGO FUENTE:

Imports System.Data.SqlClient

Public Class Form1

Enum e_FILTER_OPTION SIN_FILTRO = 0CADENA_QUE_COMIENCE_CON = 1CADENA_QUE_NO_COMIENCE_CON = 2CADENA_QUE_CONTENGA = 3CADENA_QUE_NO_CONTENGA = 4CADENA_IGUAL = 5

End Enum

Private cn As SqlConnection Private ds As DataSet Private da As SqlDataAdapter

Private dr As DataRow Private dt As DataTable Private estado As String Private pa, tot, col, fil As Integer Private comando As SqlCommandBuilder ' Private srt As String Private BindingSource1 As Windows.Forms.BindingSource = New BindingSource

Private Sub Aplicar_Filtro()' filtrar por el campo nombreDim ret As Integer = Filtrar_grdClientes("Nombres", TextBox1.Text.Trim, BindingSource1, grdClientes, CType(ComboBox1.SelectedIndex, e_FILTER_OPTION))If ret = 0 Then

' si no hay registros cambiar el color del txtboxTextBox1.BackColor = Color .Red

Else TextBox1.BackColor = Color .White

End If ' visualizar la cantidad de registrosMe.Text = ret & " Registros encontrados"

End Sub





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Function Filtrar_grdClientes(ByVal Columna As String, ByVal texto As String, ByVal BindingSource As BindingSource, ByVal DataGridView As DataGridView, Optional ByVal Opcion_Filtro As e_FILTER_OPTION = Nothing) As Integer

' verificar que el DataSource no esté vacioIf BindingSource1.DataSource Is Nothing Then

Return 0End If Try

Dim filtro As String = String.Empty' Seleccionar la opciónSelect Case Opcion_Filtro

Case e_FILTER_OPTION.CADENA_QUE_COMIENCE_CONfiltro = "like '" & texto.Trim & "%'"

Case e_FILTER_OPTION.CADENA_QUE_NO_COMIENCE_CONfiltro = "Not like '" & texto.Trim & "%'"

Case e_FILTER_OPTION.CADENA_QUE_NO_CONTENGAfiltro = "Not like '%" & texto.Trim & "%'"

Case e_FILTER_OPTION.CADENA_QUE_CONTENGAfiltro = "like '%" & texto.Trim & "%'"

Case e_FILTER_OPTION.CADENA_IGUALfiltro = "='" & texto.Trim & "'"

End Select ' Opción para no filtrarIf Opcion_Filtro = e_FILTER_OPTION.SIN_FILTRO Then

filtro = String.EmptyEnd If ' armar el sqlIf filtro <> String.Empty Then

filtro = "[" & Columna & "]" & filtroEnd If ' asigar el criterio a la propiedad Filter del BindingSourceBindingSource.Filter = filtro' enlzar el datagridview al BindingSourceDataGridView.DataSource = BindingSource.DataSource

' retornar la cantidad de registros encontradosReturn BindingSource.Count' errores

Catch ex As Exception MsgBox(ex.Message.ToString, MsgBoxStyle.Critical)

End Try Return 0

End Function





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Private Const cs As String = "Data Source=CENCACI\DSI;" & "Integrated Security=True;" & "Initial Catalog=BD_Prueba"

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Loadcn = New SqlConnection cn.ConnectionString = "Data Source=CENCACI\DSI;Initial Catalog=BD_Prueba;Integrated Security=True" da = New SqlDataAdapter ("SELECT * FROM Clientes", cn)comando = New SqlCommandBuilder (da)

ds = New DataSet()cn.Open()da.Fill(ds, "Clientes")cn.Close()' asignar el dataset al DataGridView grdClientes.DataSource = dsgrdClientes.DataMember = "Clientes" VerDatos()

Try ' Inicializar la conexión y abrirUsing cn As SqlConnection = New SqlConnection(cs)

cn.Open()

' Inicializar DataAdapter indicando el sql para recuperar'los registros de la tablaDim da As New SqlDataAdapter ("SELECT * FROM Clientes", cn)Dim dt As New DataTable ' crear un DataTable' llenarloda.Fill(dt)' enlazar el DataTable al BindingSourceBindingSource1.DataSource = dt' agregar las opciones al comboboxWith (ComboBox1)

'cargar los items de opciones para filtrar.Items.Add("No filtrar").Items.Add("Que comience con")

.Items.Add("Que No comience con").Items.Add("Que contenga")

.Items.Add("Que No contenga")

.Items.Add("Que sea igual")

.DropDownStyle = ComboBoxStyle.DropDownList

.SelectedIndex = 1End With

End Using





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' erroresCatch ex As Exception

MsgBox(ex.Message.ToString)End Try

End Sub

Private Sub VerDatos()' Capturar total de celdas tot = Me.grdClientes.GetCellCount(DataGridViewElementStates.Selected)dr = Me.ds.Tables("Clientes").Rows(Me.pa)If tot > 0 Then

'Capturar datos fil = Me.grdClientes.SelectedCells(pa).RowIndex.ToString'Capturar columna seleccionada col = Me.grdClientes.SelectedCells(pa).ColumnIndex.ToString'mostrar celda seleccionada Me.TxtId_Cliente.Text = Me.grdClientes.Item(col, fil).ValueMe.TxtNombres.Text = Me.grdClientes.Item(col + 1, fil).ValueMe.TxtApellidos.Text = Me.grdClientes.Item(col + 2, fil).Value

Me.TxtDNI.Text = Me.grdClientes.Item(col + 3, fil).ValueEnd If End Sub

Private Sub grdClientes_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles grdClientes.CellContentClick

VerDatos()grdClientes.PerformLayout()

End Sub

Private Sub BtnNuevo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnNuevo.ClickLimpiaDatos()Me.TxtId_Cliente.Text = ""

'sumar nuevo Id_Cliente TxtId_Cliente.Text = "C00" & Me.grdClientes.RowCountEnd Sub Private Sub LimpiaDatos()

Me.TxtNombres.Text = "" Me.TxtApellidos.Text = "" Me.TxtDNI.Text = "" Me.TxtNombres.Focus()





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End Sub

Private Sub BtnGrabar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnGrabar.ClickIf estado = "Actualizar" Then

If MsgBox("¿deseas modificar el registro?", MsgBoxStyle.YesNo, "Aviso") = MsgBoxResult.Yes Then dr = Me.ds.Tables("Clientes").Rows(Me.fil)dr("Codigo") = Me.TxtId_Cliente.Text

dr("Nombres") = Me.TxtNombres.Textdr("Apellidos") = Me.TxtApellidos.Textdr("DNI") = Me.TxtDNI.Textestado = ""

End If Else

If MsgBox("Deseas grabar el registro?", MsgBoxStyle.YesNo, "Aviso") = MsgBoxResult.Yes Then dr = Me.ds.Tables("Clientes").NewRow()dr("Codigo") = Me.TxtId_Cliente.Textdr("Nombres") = Me.TxtNombres.Textdr("Apellidos") = Me.TxtApellidos.Textdr("DNI") = Me.TxtDNI.TextMe.ds.Tables("Clientes").Rows.Add(dr)

End If End If da.Update(ds, "Clientes")

End Sub

Private Sub BtnModificar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnModificar.Clickestado = "Actualizar" Me.TxtNombres.Focus()

End Sub

Private Sub BtnEliminar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnEliminar.Click

dr = Me.ds.Tables("Clientes").Rows(Me.fil)dr.Delete()dt = Me.ds.Tables("Clientes").GetChanges(DataRowState.Deleted)Me.da.Update(dt)Me.ds.Tables("Clientes").AcceptChanges()VerDatos()

End Sub





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Private Sub BtnSalir_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnSalir.Click

Me.Close()End Sub

Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged

Aplicar_Filtro()End Sub End Class

Documents

Mantenimiento y Filtrado de Registros