Question

以下代码提示用户选择从pictureBox保存图像的路径：

        Stream myStream;
        SaveFileDialog saveFileDialog1 = new SaveFileDialog();            
        saveFileDialog1.Filter = "Portable Network Graphics|*.png";
        saveFileDialog1.Title = "Bild speichern";
        saveFileDialog1.RestoreDirectory = true;
        saveFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);

        if (saveFileDialog1.ShowDialog() == DialogResult.OK)
        {
            if ((myStream = saveFileDialog1.OpenFile()) != null)
            {
                this.picBox.Image.Save(myStream.ToString()); // is not getting the selected path
                myStream.Close();
            }
        }

但是如何从myStream获取路径或将图像保存到用户定义的位置（兼容.NET 3.5）？

Answer 1

如果要从保存对话框中获取所选文件路径，请使用...

saveFileDialog1.FileName;

有关此属性的详细信息，请参阅here

您无需担心使用Stream执行此任务。

为了清楚起见，这是你的代码应该是......

SaveFileDialog saveFileDialog1 = new SaveFileDialog();            
saveFileDialog1.Filter = "Portable Network Graphics|*.png";
saveFileDialog1.Title = "Bild speichern";
saveFileDialog1.RestoreDirectory = true;
saveFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);

if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
    this.picBox.Image.Save(saveFileDialog1.FileName);
}

Answer 2

你只能使用SaveFileDialog.FileName，不需要分开的流，试试这个：

using (var saveFileDialog1 = new SaveFileDialog())
{
    saveFileDialog1.Filter = "Portable Network Graphics|*.png";
    saveFileDialog1.Title = "Bild speichern";
    saveFileDialog1.RestoreDirectory = true;
    saveFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);

    if (saveFileDialog1.ShowDialog() == DialogResult.OK)
    {
        picBox.Image.Save(saveFileDialog1.FileName);
    }
}

Answer 3

您可以使用：

string path = Path.GetDirectory(saveFileDialog1.Filename);
this.picBox.Image.Save(saveFileDialog1.Filename);

你真的不需要一个流来做到这一点：）

Answer 4

这是怎么回事？

SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.Filter = "Portable Network Graphics|*.png";
saveFileDialog1.Title = "Bild speichern";
saveFileDialog1.RestoreDirectory = true;
saveFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);

if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
    (using FileStream fStr = new FileStream(saveFileDialog1.FileName, FileMode.Create))
    {
        this.picBox.Image.Save(fStr);
        fStr.Close();
    }
}

如何将图像从Stream对象保存到选定路径

4 个答案: