我怎么能提示用户选择保存文件的位置？ [英] How can I prompt a user to choose a location to save a file?

问题描述

在我的主要形式我有一个名为SavePDFDocument（）方法：

In my main Form I have a method called SavePDFDocument():

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

正如你所看到的，现在我手动在键入姓名文件。我想问用户选择保存位置和什么样的名字给它

As you can see, right now I'm manually typing in a name for the file. I'd like to ask the user to choose where to save it and what name to give it.

这是我使用上述CreatePDF（）方法：

This is the CreatePDF() method I'm using above:

public void CreatePDF(List<System.Drawing.Image> 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？

推荐答案

你看看的 SaveFileDialog ？

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();
         }
     }
}

这篇关于我怎么能提示用户选择保存文件的位置？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！