如何使用C＃在Xamarin Studio中保存文本文件 [英] How to save text file in Xamarin Studio using C#

问题描述

如何使用C＃在Xamarin Studio中保存文本文件



提前谢谢

How to save text file in Xamarin Studio using C#

Thanks in advance

推荐答案

你在Xamarin中写文件就像在C＃中的任何文件一样。



您可以使用命名空间

You write files in Xamarin pretty much as you would any file in C#.

You can use the namespace

Android.OS.Environment

为您提供系统文件夹，例如获取SD卡的路径你将使用

to give you the system folders e.g. to get the path to the SD card you would use

Android.OS.Environment.ExternalStorageDirectory

这是一个将图像保存到SD卡的示例。

Here is an example of saving an image to the SD card.

private string SaveToSd()
        {
            var folder = Android.OS.Environment.ExternalStorageDirectory + Java.IO.File.Separator + "ImageFolder";
            var extFileName = folder +
                              Java.IO.File.Separator +
                              Guid.NewGuid() + ".png";

            try
            {
                if (!Directory.Exists(folder))
                    Directory.CreateDirectory(folder);
                using (var fs = new FileStream(extFileName, FileMode.OpenOrCreate))
                {
                    //TODO perform any validation / compression as required
                    return extFileName;
                }
            }
            catch
            {
                RunOnUiThread(() =>
                {
                    var builder = new AlertDialog.Builder(this);
                    builder.SetMessage("Saving image went wrong");
                    builder.SetTitle("Unable to save image");
                    builder.Show();
                });
                return "";
            }
        }

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