VB.NET中怎么操作dbf文件
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VB.NET操作dbf文件代码示例:
Imports System.
Data.OleDbImports Lion.IO.
SharpZIP.ZipImports Lion.IO.
SharpZIP.ChecksumsImports System.IO
Module Module1
Sub Main()
'Try
Dim cn1 As New OleDbConnection( _
"Provider=VFPOLEDB.1;Data
Source=C:\Temp\;")cn1.Open()
'-- Make some VFP data to
play withDim cmd1 As New OleDbCommand
( _"Create Table TestDBF (Field1
I, Field2 C(10))", cn1)Dim cmd2 As New OleDbCommand( _
"Insert Into TestDBF Values
(1, '行贿)", cn1)Dim cmd3 As New OleDbCommand( _
"Insert Into TestDBF Values
(2, '受贿')", cn1)cmd1.ExecuteNonQuery()
cmd2.ExecuteNonQuery()
cmd3.ExecuteNonQuery()
cn1.Close()
Dim cn2 As New OleDbConnection( _
"Provider=VFPOLEDB.1;Data Source=C:\Temp\;")
cn2.Open()
Dim cmd4 As New OleDbCommand( _
"Select * From TestDBF", cn2)
Dim da1 As New OleDbDataAdapter(cmd4)
Dim ds1 As New DataSet
Dim dr1 As DataRow
da1.Fill(ds1)
For Each dr1 In ds1.Tables(0).Rows
Console.WriteLine(dr1.Item(1).ToString())
Next
cn2.Close()
Dim crc As New Crc32
Dim s As New ZipOutputStream(System.
IO.File.Create("c:\temp\dbf.zip"))s.SetLevel(6)
Dim fs As FileFileStream = File.Open
Read("c:\temp\testdbf.dbf")Dim b(fs.Length - 1) As Byte'c#中的
语句为byte[] b = byte[fs.Length ];要注意这点fs.Read(b, 0, b.Length)
Dim entry As ZipEntry = New ZipEntry
("c:\temp\testdbf.dbf")entry.DateTime = DateTime.Now
entry.Size = fs.Length
fs.Close()
crc.Reset()
crc.Update(b)
entry.Crc = crc.Value
s.PutNextEntry(entry)
s.Write(b, 0, b.Length)
s.Finish()
s.Close()
Console.ReadLine()
'Catch e As Exception
'MsgBox(e.ToString())
'End Try
End Sub
End Module
以上就是VB.NET中怎么操作dbf文件,小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注创新互联行业资讯频道。
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