如何提示用户选择保存文件的位置？

在我的主窗体中，我有一个名为SavePDFDocument（）的方法：

private void SavePDFDocument() { PDFWrapper pdfWrapper = new PDFWrapper(); pdfWrapper.CreatePDF(horizontalPictureScroller1.GetPictures(), "pdfDocument.pdf"); } 

如您所见，现在我手动输入文件的名称。 我想请用户选择保存位置以及提供它的名称。

这是我上面使用的CreatePDF（）方法：

 public void CreatePDF(List images, string filename) { if (images.Count >= 1) { Document document = new Document(PageSize.LETTER); try { // step 2: // we create a writer that listens to the document // and directs a PDF-stream to a file PdfWriter.GetInstance(document, new FileStream(filename, FileMode.Create)); // step 3: we open the document document.Open(); foreach (var image in images) { iTextSharp.text.Image pic = iTextSharp.text.Image.GetInstance(image, System.Drawing.Imaging.ImageFormat.Jpeg); if (pic.Height > pic.Width) { //Maximum height is 800 pixels. float percentage = 0.0f; percentage = 700 / pic.Height; pic.ScalePercent(percentage * 100); } else { //Maximum width is 600 pixels. float percentage = 0.0f; percentage = 540 / pic.Width; pic.ScalePercent(percentage * 100); } pic.Border = iTextSharp.text.Rectangle.BOX; pic.BorderColor = iTextSharp.text.BaseColor.BLACK; pic.BorderWidth = 3f; document.Add(pic); document.NewPage(); } } catch (DocumentException de) { Console.Error.WriteLine(de.Message); } catch (IOException ioe) { Console.Error.WriteLine(ioe.Message); } // step 5: we close the document document.Close(); } } 

有什么建议？

 private void button1_Click(object sender, System.EventArgs e) { Stream myStream ; SaveFileDialog saveFileDialog1 = new SaveFileDialog(); saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ; saveFileDialog1.FilterIndex = 2 ; saveFileDialog1.RestoreDirectory = true ; if(saveFileDialog1.ShowDialog() == DialogResult.OK) { if((myStream = saveFileDialog1.OpenFile()) != null) { // Code to write the stream goes here. myStream.Close(); } } } 

 // Configure save file dialog box Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog(); dlg.FileName = "Document"; // Default file name dlg.DefaultExt = ".text"; // Default file extension dlg.Filter = "Text documents (.txt)|*.txt"; // Filter files by extension // Show save file dialog box Nullable result = dlg.ShowDialog(); // Process save file dialog box results if (result == true) { // Save document string filename = dlg.FileName; }