将数据库数据导出到文本文件 [英] Exporting database data to a text file
本文介绍了将数据库数据导出到文本文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
这有点奇怪，我已经剥去了它的熊骨头的代码，但它仍然没有像以前那样做...也许我看不到树木的树林，但是我看不到我做错了什么-:基本上，我是从SQL Server调出数据-通过循环将其拉出，在此示例中仅在mdb文件中进行处理...我创建了一个按钮，当按下该按钮时，该按钮会将数据导出到* .txt文件=不再执行此操作，它创建txt文件，但不添加数据，任何想法?
This is kinda weird, I have stripped the code to it''s bear bones and still it''s not doing what it used to do... maybe I cant see the woods for the tree, but I cant see what I have done wrong - : Basically, I am calling out data from a SQL server - pulling it through a loop, in this example just doing it on an mdb file... I created a button that when pressed it exported the data to a *.txt file = doesn''t do that anymore, it creates the txt file, but doesn''t append the data, any thoughts???
<pre lang="xml"><%@ Page Language=VB Debug=true %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.OLEDB" %>
<script runat=server Language=VB >
'Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
Dim intBtnClkCount As Integer = 0
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles writeButton.Click
intBtnClkCount += 1
' writeButton.Visible = False
End Sub
Sub objWriter(ByVal s As Object, ByVal e As EventArgs)
Dim FILE_NAME As String = "C:\Users\Fe\Desktop\xml\test.f"
Dim DBConn As OleDbConnection
Dim DBCommand As OleDbDataAdapter
Dim DSPageData As New DataSet
Dim I As Long
DBConn = New OleDbConnection( _
"PROVIDER=Microsoft.Jet.OLEDB.4.0;" _
& "DATA SOURCE=" _
& Server.MapPath("storage1.mdb;"))
DBCommand = New OleDbDataAdapter _
("Select * from samplesource", DBConn)
DBCommand.Fill(DSPageData, _
"samplesource")
For I = 0 To DSPageData.Tables("samplesource").Rows.Count - 1
Dim objWriter As New System.IO.StreamWriter(FILE_NAME)
lblMessage.Text = lblMessage.Text _
& "<BR>Processed Record: " _
& DSPageData.Tables("samplesource"). _
Rows(I).Item("s1")
objWriter.Close()
Next
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE></TITLE>
</HEAD>
<Body LEFTMARGIN="40">
<form id="Form1" runat="server">
<BR><BR>
<asp:label
id="lblMessage"
runat="Server"/><asp:Button ID="writeButton" Text="Write" runat="server"
OnClick="objWriter" />
</form>
</BODY>
</HTML>
推荐答案
您已经创建了StreamWriterclass的对象.
但是，您需要使用Write()或WriteLine()方法对其进行写入.
您只是在将文本写到标签-lblMessage.Text.
You have create an object of theStreamWriterclass.
However, you need to write to it using theWrite()orWriteLine()method.
You are simply writing text to a label -lblMessage.Text.
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