Lire et générer un fichier dbase avec un code 100% .net
Description
Comment fabriquer un fichier dBase sans utiliser le driver MS Jet d'Access ? et sans utiliser Shapelib ? etc...
eh bien en utilisant mon code !
La classe DbfManager fournit les méthodes :
- ReadDBF
- WriteDBF2
- WriteDBF3Plus
- WriteDBF4
- WriteDBF5
D'une manière générale, seuls les premiers champs du header de fichier - ceux qui sont utiles à la gestion des données - sont gérés (structure CommonDBFHeader). Les autres champs sont très spécifiques.
La classe DBFManager est dans le fichier .zip.
je vous laisse faire ...
eh bien en utilisant mon code !
La classe DbfManager fournit les méthodes :
- ReadDBF
- WriteDBF2
- WriteDBF3Plus
- WriteDBF4
- WriteDBF5
D'une manière générale, seuls les premiers champs du header de fichier - ceux qui sont utiles à la gestion des données - sont gérés (structure CommonDBFHeader). Les autres champs sont très spécifiques.
La classe DBFManager est dans le fichier .zip.
Source / Exemple :
Exemple d'utilisation :
Imports System.Globalization
Imports dll_dbf_dotnet
Public Class Form1
Private Const TARGET_DIR As String = "C:\Temp"
Private Const TARGET_FILE_BASENAME As String = "dbf_file"
#Region "btnChargerDBFdotNet_Click"
Private Sub btnChargerDBFdotNet_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnChargerDBFdotNet.Click
Try
Dim ofDlg As New OpenFileDialog
If ofDlg.ShowDialog() = Windows.Forms.DialogResult.OK Then
Dim f As String = ofDlg.FileName
Dim avant As DateTime = Now
Dim contents As DBFContents = DBFManager.ReadDBF(f, (Me.chkAllStrings.CheckState = CheckState.Checked))
Dim apres As DateTime = Now
Dim diff As TimeSpan = apres - avant
Console.WriteLine("Chargement du fichier " + f + " avec .NET en " + diff.Milliseconds.ToString + " milli secondes.")
If contents.header.version = DBFManager.DBFVersion2 Then
Console.WriteLine("dBase II")
Console.WriteLine(contents.header.version)
Console.WriteLine(contents.header.updateYear)
Console.WriteLine(contents.header.updateMonth)
Console.WriteLine(contents.header.updateDay)
Console.WriteLine(contents.header.numRecords)
Console.WriteLine(contents.header.recordLength)
For Each fd As DBFFieldDescriptor In contents.fields
Console.Write(fd.name + " (" + fd.type + ") length=" _
+ fd.length.ToString + vbCrLf)
Next
Console.Write(vbCrLf)
For j As Integer = 0 To contents.header.numRecords - 1
Dim fc As Integer = -1
For Each fd As DBFFieldDescriptor In contents.fields
fc += 1
If Me.chkAllStrings.CheckState = CheckState.Checked Then
Dim datas As List(Of String) = DirectCast(contents.data(fc), List(Of String))
Console.Write("<" + datas(j) + ">")
Else
Select Case fd.type
Case DBFFieldType.DBFNumeric
Dim datas As List(Of Decimal) = DirectCast(contents.data(fc), List(Of Decimal))
Console.Write("<" + datas(j).ToString + ">")
Case DBFFieldType.DBFCharacter
Dim datas As List(Of String) = DirectCast(contents.data(fc), List(Of String))
Console.Write("<" + datas(j) + ">")
Case DBFFieldType.DBFLogical
Dim datas As List(Of Boolean) = DirectCast(contents.data(fc), List(Of Boolean))
Console.Write("<" + datas(j).ToString + ">")
Case Else
Console.Write("??? ")
End Select
End If
Next
Console.Write(vbCrLf)
Next
End If
If contents.header.version = DBFManager.dbfversion3 Then
Console.WriteLine("dBase III Plus/IV/V")
Console.WriteLine(contents.header.version)
Console.WriteLine(contents.header.updateYear)
Console.WriteLine(contents.header.updateMonth)
Console.WriteLine(contents.header.updateDay)
Console.WriteLine(contents.header.numRecords)
Console.WriteLine(contents.header.recordLength)
For Each fd As DBFFieldDescriptor In contents.fields
Console.Write(fd.name + " (" + fd.type + ") length=" _
+ fd.length.ToString + vbCrLf)
Next
Console.Write(vbCrLf)
For j As Integer = 0 To contents.header.numRecords - 1
Dim fc As Integer = -1
For Each fd As DBFFieldDescriptor In contents.fields
fc += 1
If Me.chkAllStrings.CheckState = CheckState.Checked Then
Dim datas As List(Of String) = DirectCast(contents.data(fc), List(Of String))
Console.Write("<" + datas(j) + ">")
Else
Select Case fd.type
Case DBFFieldType.DBFNumeric
Dim datas As List(Of Decimal) = DirectCast(contents.data(fc), List(Of Decimal))
Console.Write("<" + datas(j).ToString + ">")
Case DBFFieldType.DBFCharacter
Dim datas As List(Of String) = DirectCast(contents.data(fc), List(Of String))
Console.Write("<" + datas(j) + ">")
Case DBFFieldType.DBFDate
Dim datas As List(Of DateTime) = DirectCast(contents.data(fc), List(Of DateTime))
Console.Write("<" + datas(j).ToString + ">")
Case DBFFieldType.DBFLogical
Dim datas As List(Of Boolean) = DirectCast(contents.data(fc), List(Of Boolean))
Console.Write("<" + datas(j).ToString + ">")
Case DBFFieldType.DBFFloat
Dim datas As List(Of Double) = DirectCast(contents.data(fc), List(Of Double))
Console.Write("<" + datas(j).ToString + ">")
Case Else
Console.Write("??? ")
End Select
End If
Next
Console.Write(vbCrLf)
Next
End If
End If
Catch ex_app As ApplicationException
MessageBox.Show(ex_app.Message, "Erreur Application", MessageBoxButtons.OK, MessageBoxIcon.Error)
Catch ex_fnf As System.IO.FileNotFoundException
MessageBox.Show(ex_fnf.Message, "Fichier introuvable", MessageBoxButtons.OK, MessageBoxIcon.Error)
Catch ex As Exception
MessageBox.Show(ex.Message, "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End Sub
#End Region
#Region "btnWriteDBase3_Click"
Private Sub btnWriteDBase3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnWriteDBase3.Click
Try
Dim fields As New ArrayList
fields.Add(DBFManager.CreateCharacterDBFField("ONE", 8))
fields.Add(DBFManager.CreateLogicalDBFField("TWO"))
fields.Add(DBFManager.CreateCharacterDBFField("THREE", 10))
fields.Add(DBFManager.CreateNumericDBFField("the_fourth", 8, 4))
fields.Add(DBFManager.CreateCharacterDBFField("FFFIVE", 5))
fields.Add(DBFManager.CreateDateDBFField("my_date"))
Dim datas As New List(Of Object)
Dim los As New List(Of String)
los.Add("abcd")
los.Add("efghijk")
los.Add("kk")
los.Add("hh")
los.Add("gg")
los.Add("dd")
los.Add("rty")
los.Add("aze")
datas.Add(los)
Dim lob As New List(Of Boolean)
lob.Add(True)
lob.Add(False)
lob.Add(False)
lob.Add(False)
lob.Add(False)
lob.Add(True)
lob.Add(False)
lob.Add(True)
datas.Add(lob)
Dim los1 As New List(Of String)
los1.Add("once")
los1.Add("upon")
los1.Add("a time!!!")
los1.Add("the")
los1.Add("world")
los1.Add("is")
los1.Add("not")
los1.Add("enought")
datas.Add(los1)
Dim lod As New List(Of Decimal)
lod.Add(321.45D)
lod.Add(-0.0254D)
lod.Add(1.01D)
lod.Add(0.07D)
lod.Add(7)
lod.Add(0.007D)
lod.Add(0.07D)
lod.Add(1.01D)
datas.Add(lod)
Dim los2 As New List(Of String)
los2.Add("i'm")
los2.Add("the")
los2.Add("BEST")
los2.Add("BEST")
los2.Add("BEST")
los2.Add("BEST")
los2.Add("BEST")
los2.Add("BEST")
datas.Add(los2)
Dim lodat As New List(Of DateTime)
lodat.Add(Date.Now)
lodat.Add(New DateTime(1985, 12, 25))
lodat.Add(New DateTime(2001, 9, 11))
lodat.Add(New DateTime(1977, 8, 20))
lodat.Add(New DateTime(2000, 11, 11))
lodat.Add(New DateTime(2007, 1, 2))
lodat.Add(New DateTime(1945, 12, 24))
lodat.Add(New DateTime(1921, 4, 22))
datas.Add(lodat)
' 8 records added
If (Me.chkCompleteHeaders.CheckState = CheckState.Checked) OrElse _
(Me.chkCompleteHeaders.CheckState = CheckState.Unchecked) Then
DBFManager.WriteDBF3Plus(TARGET_DIR + "\" + TARGET_FILE_BASENAME + "3.dbf", _
fields, 8, datas)
End If
Catch ex_app As ApplicationException
MessageBox.Show(ex_app.Message, "Erreur Application", MessageBoxButtons.OK, MessageBoxIcon.Error)
Catch ex As Exception
MessageBox.Show(ex.Message, "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End Sub
#End Region
#Region "btnWriteDBase4_Click"
Private Sub btnWriteDBase4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnWriteDBase4.Click
Try
Dim fields As New ArrayList
fields.Add(DBFManager.CreateCharacterDBFField("ONE", 16))
fields.Add(DBFManager.CreateLogicalDBFField("TWO"))
fields.Add(DBFManager.CreateCharacterDBFField("THREE", 30))
fields.Add(DBFManager.CreateNumericDBFField("the_fourth", 8, 4))
fields.Add(DBFManager.CreateCharacterDBFField("FFFIVE", 5))
fields.Add(DBFManager.CreateFloatDBFField("Double1", 7, 3))
fields.Add(DBFManager.CreateDateDBFField("my_date"))
fields.Add(DBFManager.CreateFloatDBFField("double2", 10, 3))
Dim datas As New List(Of Object)
Dim los As New List(Of String)
' first record
los.Add("abcd")
' second record
los.Add("efghijk")
' third record
los.Add("kk")
datas.Add(los)
Dim lob As New List(Of Boolean)
' first record
lob.Add(True)
' second record
lob.Add(False)
' third record
lob.Add(False)
datas.Add(lob)
Dim los1 As New List(Of String)
' first record
los1.Add("once")
' second record
los1.Add("opon")
' third record
los1.Add("a timeeeeeeeeeeeeeeeeejj")
datas.Add(los1)
Dim lod As New List(Of Decimal)
' first record
lod.Add(321.45D)
' second record
lod.Add(-0.0254D)
' third record
lod.Add(1.01D)
datas.Add(lod)
Dim los2 As New List(Of String)
' first record
los2.Add("i'm")
' second record
los2.Add("the")
' third record
los2.Add("BEST")
datas.Add(los2)
Dim lodbl1 As New List(Of Double)
' first record
lodbl1.Add(-25.63)
' second record
lodbl1.Add(666.6)
' third record
lodbl1.Add(0.666)
datas.Add(lodbl1)
Dim lodat As New List(Of DateTime)
' first record
lodat.Add(Date.Now)
' second record
lodat.Add(New DateTime(1985, 12, 25))
' third record
lodat.Add(New DateTime(2001, 9, 11))
datas.Add(lodat)
Dim lodbl2 As New List(Of Double)
' first record
lodbl2.Add(-5.055)
' second record
lodbl2.Add(11)
' third record
lodbl2.Add(999999)
datas.Add(lodbl2)
' 3 records added
If Me.chkCompleteHeaders.CheckState = CheckState.Checked Then
DBFManager.WriteDBF4(TARGET_DIR + "\" + TARGET_FILE_BASENAME + "4.dbf", _
fields, 3, datas)
Else
' four extra flags are set to 0 because I don't know exactly what to specify
DBFManager.WriteDBF4(TARGET_DIR + "\" + TARGET_FILE_BASENAME + "4.dbf", _
fields, 3, datas, 0, 0, 0, 0)
End If
Catch ex_app As ApplicationException
MessageBox.Show(ex_app.Message, "Erreur Application", MessageBoxButtons.OK, MessageBoxIcon.Error)
Catch ex As Exception
MessageBox.Show(ex.Message, "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End Sub
#End Region
#Region "btnWriteDBase5_Click"
Private Sub btnWriteDBase5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnWriteDBase5.Click
Try
Dim fields As New ArrayList
fields.Add(DBFManager.CreateCharacterDBFField("ONE", 16))
fields.Add(DBFManager.CreateLogicalDBFField("TWO"))
fields.Add(DBFManager.CreateCharacterDBFField("THREE", 30))
fields.Add(DBFManager.CreateNumericDBFField("the_fourth", 8, 4))
fields.Add(DBFManager.CreateCharacterDBFField("FFFIVE", 5))
fields.Add(DBFManager.CreateFloatDBFField("Double1", 7, 3))
fields.Add(DBFManager.CreateDateDBFField("my_date"))
fields.Add(DBFManager.CreateFloatDBFField("double2", 10, 3))
Dim datas As New List(Of Object)
Dim los As New List(Of String)
' first record
los.Add("abcd")
' second record
los.Add("efghijk")
' third record
los.Add("kk")
datas.Add(los)
Dim lob As New List(Of Boolean)
' first record
lob.Add(True)
' second record
lob.Add(False)
' third record
lob.Add(False)
datas.Add(lob)
Dim los1 As New List(Of String)
' first record
los1.Add("once")
' second record
los1.Add("upon")
' third record
los1.Add("a time")
datas.Add(los1)
Dim lod As New List(Of Decimal)
' first record
lod.Add(321.45D)
' second record
lod.Add(-0.0254D)
' third record
lod.Add(1.01D)
datas.Add(lod)
Dim los2 As New List(Of String)
' first record
los2.Add("i'm")
' second record
los2.Add("the")
' third record
los2.Add("BEST")
datas.Add(los2)
Dim lodbl1 As New List(Of Double)
' first record
lodbl1.Add(-25.63)
' second record
lodbl1.Add(666.6)
' third record
lodbl1.Add(0.666)
datas.Add(lodbl1)
Dim lodat As New List(Of DateTime)
' first record
lodat.Add(Date.Now)
' second record
lodat.Add(New DateTime(1985, 12, 25))
' third record
lodat.Add(New DateTime(2001, 9, 11))
datas.Add(lodat)
Dim lodbl2 As New List(Of Double)
' first record
lodbl2.Add(-5.055)
' second record
lodbl2.Add(11)
' third record
lodbl2.Add(999999)
datas.Add(lodbl2)
' 3 records added
If Me.chkCompleteHeaders.CheckState = CheckState.Checked Then
DBFManager.WriteDBF5(TARGET_DIR + "\" + TARGET_FILE_BASENAME + "5.dbf", _
fields, 3, datas)
Else
' four extra flags are set to 0 because I don't know exactly what to specify
DBFManager.WriteDBF5(TARGET_DIR + "\" + TARGET_FILE_BASENAME + "5.dbf", _
fields, 3, datas, 0, 0, 0, 0)
End If
Catch ex_app As ApplicationException
MessageBox.Show(ex_app.Message, "Erreur Application", MessageBoxButtons.OK, MessageBoxIcon.Error)
Catch ex As Exception
MessageBox.Show(ex.Message, "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End Sub
#End Region
#Region "btnWriteDbase2_Click"
Private Sub btnWriteDbase2_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles btnWriteDbase2.Click
Try
Dim fields As New ArrayList
fields.Add(DBFManager.CreateCharacterDBF2Field("ONE", 8))
fields.Add(DBFManager.CreateLogicalDBF2Field("TWO"))
fields.Add(DBFManager.CreateNumericDBF2Field("the_fourth", 8, 4))
Dim datas As New List(Of Object)
Dim los As New List(Of String)
los.Add("abcd")
los.Add("efghijk")
los.Add("kk")
los.Add("hh")
los.Add("gg")
los.Add("dd")
los.Add("rty")
los.Add("aze")
datas.Add(los)
Dim lob As New List(Of Boolean)
lob.Add(True)
lob.Add(False)
lob.Add(False)
lob.Add(False)
lob.Add(False)
lob.Add(True)
lob.Add(False)
lob.Add(True)
datas.Add(lob)
Dim lod As New List(Of Decimal)
lod.Add(321.45D)
lod.Add(-0.0254D)
lod.Add(1.01D)
lod.Add(0.07D)
lod.Add(7)
lod.Add(0.007D)
lod.Add(0.07D)
lod.Add(1.01D)
datas.Add(lod)
' 8 records added
DBFManager.WriteDBF2(TARGET_DIR + "\" + TARGET_FILE_BASENAME + "2.dbf", _
fields, 8, datas)
Catch ex_app As ApplicationException
MessageBox.Show(ex_app.Message, "Erreur Application", MessageBoxButtons.OK, MessageBoxIcon.Error)
Catch ex As Exception
MessageBox.Show(ex.Message, "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End Sub
#End Region
End Class
Conclusion :
je vous laisse faire ...
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