我正在尝试使用VB.NET创建数据网格并将内容导出到文本文件,我在SSIS脚本任务中执行此操作,以便自动执行将动态表格导出到文本文件的过程。我没有收到任何错误,文件已创建,但文件为空。
我在这段代码中做错了什么?
Public Sub Main()
Dim FName As String = "D:\test.TXT"
''''''''''''''''''''''''''''''''''''''''''
If File.Exists(FName) Then
File.Delete(FName)
End If
''''''''''''''''''''''''''''''''''''''''''
Dim myConnection As OleDbConnection = New OleDbConnection("Data Source=localhost;Provider=SQLNCLI10;Initial Catalog=AdventureWorksDW2008R2;Integrated Security=SSPI;")
Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select * from Table")
Dim ds As DataSet = New DataSet
da.Fill(ds, "Test")
Dim DataGrid1 As New DataGrid
DataGrid1.DataSource = ds.DefaultViewManager
Dim DataGridView1 As New DataGridView
DataGridView1.DataSource = ds
Dim dgvc As DataGridViewCell
Dim sw As New System.IO.StreamWriter(FName)
For Each dgvr As DataGridViewRow In DataGridView1.Rows
Dim intCellCount As Integer = dgvr.Cells.Count
Dim intCounter As Integer = 1
For Each dgvc In dgvr.Cells()
If intCounter <> intCellCount Then
sw.Write(dgvc.Value.ToString & "|")
Else
sw.WriteLine(dgvc.Value.ToString)
End If
intCounter += 1
Next
Next
Dts.TaskResult = ScriptResults.Success
End Sub
答案 0 :(得分:11)
这是使用Script Task
将不同结构的表导出到平面文件的可能方法。此示例将使用“脚本任务”将包含不同字段和数据的两个表导出到平面文件。要导出数据,您可以使用DataReader
而不是DataGrid
。可能有其他可能的方法来做到这一点。
分步流程:
dbo.TablesList
,dbo.Source1
和dbo.Source2
的三个表。dbo.TablesList
,dbo.Source1
和`dbo.Source2``。Connection manager
上,创建一个名为 SQLServer 的OLE DB connection
以连接到SQL Server实例,如屏幕截图# 2 所示。 Execute SQL Task
中放置Foreach Loop Container
,Script Task
和Foreach loop container
,如屏幕截图# 4 所示。 Execute SQL task
,如屏幕截图# 5 和# 6 所示。Foreach Loop container
,如屏幕截图# 7 和# 8 所示。Script Task Code
。希望有所帮助。
SQL脚本:
CREATE TABLE [dbo].[Source1](
[Id] [int] IDENTITY(1,1) NOT NULL,
[ItemNumber] [varchar](20) NOT NULL,
[ItemName] [varchar](50) NOT NULL,
CONSTRAINT [PK_Source1] PRIMARY KEY CLUSTERED ([Id] ASC)) ON [PRIMARY]
GO
CREATE TABLE [dbo].[Source2](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Country] [varchar](20) NOT NULL,
[StateProvince] [varchar](50) NOT NULL,
CONSTRAINT [PK_Source2] PRIMARY KEY CLUSTERED ([Id] ASC)) ON [PRIMARY]
GO
CREATE TABLE [dbo].[TablesList](
[Id] [int] IDENTITY(1,1) NOT NULL,
[TableName] [varchar](50) NOT NULL,
[FilePath] [varchar](255) NOT NULL,
CONSTRAINT [PK_Tables] PRIMARY KEY CLUSTERED ([Id] ASC)) ON [PRIMARY]
GO
脚本任务代码:(使用下面给出的代码替换脚本任务中的Main()方法)
VB 可在 SSIS 2005 and above
中使用的Main()方法代码:
Public Sub Main()
Dim varCollection As Variables = Nothing
Dts.VariableDispenser.LockForRead("User::TableName")
Dts.VariableDispenser.LockForRead("User::FileName")
Dts.VariableDispenser.LockForRead("User::Delimiter")
Dts.VariableDispenser.GetVariables(varCollection)
Dim fileName As String = varCollection("User::FileName").Value.ToString()
Dim query As String = "SELECT * FROM " & varCollection("User::TableName").Value.ToString()
Dim delimiter As String = varCollection("User::Delimiter").Value.ToString()
Dim writer As StreamWriter = Nothing
Dim connection As OleDbConnection = New OleDbConnection(Dts.Connections("SQLServer").ConnectionString)
Dim command As OleDbCommand = Nothing
Dim reader As OleDbDataReader = Nothing
Try
If File.Exists(fileName) Then
File.Delete(fileName)
End If
connection.Open()
command = New OleDbCommand(query, connection)
reader = command.ExecuteReader()
If reader.HasRows Then
writer = New System.IO.StreamWriter(fileName)
Dim row As Integer = 0
While reader.Read()
Dim header As Integer = 0
Dim counter As Integer = 0
Dim fieldCount As Integer = reader.FieldCount - 1
If row = 0 Then
While header <= fieldCount
If header <> fieldCount Then
writer.Write(reader.GetName(header).ToString() & delimiter)
Else
writer.WriteLine(reader.GetName(header).ToString())
End If
header += 1
End While
End If
While counter <= fieldCount
If counter <> fieldCount Then
writer.Write(reader(counter).ToString() & delimiter)
Else
writer.WriteLine(reader(counter).ToString())
End If
counter += 1
End While
row += 1
End While
End If
Catch ex As Exception
Throw ex
Finally
connection.Close()
writer.Close()
End Try
Dts.TaskResult = ScriptResults.Success
End Sub
屏幕截图#1:
屏幕截图#2:
屏幕截图#3:
屏幕截图#4:
屏幕截图#5:
屏幕截图#6:
屏幕截图#7:
屏幕截图#8:
屏幕截图#9:
屏幕截图#10:
屏幕截图#11:
屏幕截图#12:
答案 1 :(得分:0)
为什么不使用OLEDB源组件,将表查询放在那里,然后将其输出到SSIS中的平面文件编写器而不是使用脚本组件? This blog post说明了如何执行此操作。