Vb.net 如何在我的代码中实现SaveFileDialog,其中我使用的是FileTeam对象
下面是我的代码和方法,但我似乎不知道如何在。。。任何信息或指导将不胜感激Vb.net 如何在我的代码中实现SaveFileDialog,其中我使用的是FileTeam对象,vb.net,filestream,streamwriter,savefiledialog,Vb.net,Filestream,Streamwriter,Savefiledialog,下面是我的代码和方法,但我似乎不知道如何在。。。任何信息或指导将不胜感激 Private Sub btSave_Click(sender As System.Object, e As System.EventArgs) Handles btSave.Click If (cbPeriod.SelectedItem IsNot Nothing) Then Try Using connect As New SqlConnectio
Private Sub btSave_Click(sender As System.Object, e As System.EventArgs) Handles btSave.Click
If (cbPeriod.SelectedItem IsNot Nothing) Then
Try
Using connect As New SqlConnection(connectionString)
Dim command As New SqlCommand()
command.CommandText = selectQuery
command.Parameters.AddWithValue("@Period", cbPeriod.SelectedItem.ToString)
command.Connection = connect
Dim fileName As String
fileName = "Data.txt"
Dim seqNo As Integer = 0
Dim currDocNo As String = ""
Dim prevDocNo As String = ""
Using FileObject As New FileStream(fileName, FileMode.Create, FileAccess.Write, FileShare.None)
Using StreamWriterObj As New StreamWriter(FileObject)
connect.Open()
Using reader As SqlDataReader = command.ExecuteReader()
Dim FieldCount As Integer = reader.FieldCount - 1
For i = 0 To FieldCount
StreamWriterObj.Write(reader.GetName(i).ToString)
StreamWriterObj.Write(" @ ")
Next
StreamWriterObj.WriteLine()
Do While reader.Read()
currDocNo = reader.GetValue(reader.GetOrdinal("ДокументNo")).ToString
StreamWriterObj.Write(reader.Item(0))
For i = 1 To FieldCount
currDocNo = reader.GetValue(reader.GetOrdinal("ДокументNo")).ToString
If (reader.GetName(i).Equals("ПореденНомер", StringComparison.InvariantCultureIgnoreCase)) Then
If (currDocNo = prevDocNo) Then
seqNo += 1
StreamWriterObj.Write(seqNo)
Else
seqNo = 1
StreamWriterObj.Write(" @ ")
StreamWriterObj.Write(seqNo)
End If
Else
StreamWriterObj.Write(" @ ")
StreamWriterObj.Write(reader.Item(i))
End If
Next
prevDocNo = currDocNo
StreamWriterObj.WriteLine()
Loop
reader.Close()
End Using
connect.Close()
MessageBox.Show("Export was successful.")
End Using
End Using
End Using
Catch ex As SqlException
MessageBox.Show(ex.Message.ToString)
End Try
Else
MessageBox.Show("Please select a value!")
End If
End Sub
如果你需要更多的信息,请告诉我。正如您所看到的,我有文件对象和所有内容,因此我想我只需要添加一些savefiledialog,但是如何将streamwriter拥有的数据获取到savefiledialog中?使用savefiledialog获取这样的文件名
Dim fileName As String
' fileName = "Data.txt"
Using sfd As New SaveFileDialog()
sfd.Filter = "Text Files (*.txt)|*.txt"
If sfd.ShowDialog() = Windows.Forms.DialogResult.OK Then
fileName = sfd.FileName
Else
Throw New Exception("User canceled out of save dialog")
End If
End Using
不要显式地调用使用块包装的一次性对象上的Close。调用Dispose方法,并使用@End为您关闭它
最后,您可以删除FileStream,并使用StreamWriter创建文件
文件对话框中没有任何内容。它只允许用户指定所需的路径和文件名。请阅读并在使用积木包装的一次性物品上使用“请勿显式调用”关闭按钮。Dispose方法被调用,它会使用@End为您关闭它。您也可以删除FileStream并使用StreamWriter创建文件。感谢这些提示。哇,我想这会比这更复杂。感谢您的帮助:
' Using FileObject As New FileStream(fileName, FileMode.Create, FileAccess.Write, FileShare.None)
' Using StreamWriterObj As New StreamWriter(FileObject)
Using StreamWriterObj As New StreamWriter(path:=fileName, append:=False)