的Windows Phone 8 - 阅读和项目在现有的TXT文件写入 [英] Windows Phone 8 - reading and writing in an existing txt file in the project

问题描述

您好我的问题是stucked，我创建了把应用程序的TXT文件。我试图从中读取数据，我之前写的内容。与该代码：

Hi i'm stucked in a problem, i created a txt file that i put on the app. I'm trying to read from it the content that i write on it before. With that code:

    public async Task WriteDataToFileAsync(string fileName, string content)
    {
        byte[] data = Encoding.Unicode.GetBytes(content);

        var folder = ApplicationData.Current.LocalFolder;
        var file = await folder.CreateFileAsync(fileName,CreationCollisionOption.ReplaceExisting);

        using (var s = await file.OpenStreamForWriteAsync())
        {
            await s.WriteAsync(data, 0, data.Length);
        }
    }

    public async Task<string> ReadFileContentsAsync(string fileName)
    {
        var folder = ApplicationData.Current.LocalFolder;

        try
        {
            var file = await folder.OpenStreamForReadAsync(fileName);

            using (var streamReader = new StreamReader(file))
            {
                return streamReader.ReadToEnd();
            }
        }
        catch (Exception)
        {
            MessageBox.Show("Error");
            return string.Empty;
        }
    }

    private async void functionWhereNeedReeding()
    {
        string contents = await this.ReadFileContentsAsync("myimportedfile.txt");
        MessageBox.Show(contents);
    }

给我所有的时间错误的消息，我不明白是哪里我的错。希望你会帮我的。可以肯定的内容仍然是空的。

Give me all times the message of error and i can't understand where is my mistake. Hoping that you'll help me. For sure contents is still empty.

推荐答案

我创造了我的WP 7项目中一个辅助函数最近，读包含一个文本文件在项目中。您可以尝试使用它，功能也WP 8项目的工作：

I created a helper function in my WP 7 project recently, to read a text file included in the project. You can try to use it, the function also working in WP 8 project :

public static class FileHelper
{
    public static string ReadFile(string filePath)
    {
        var ResrouceStream = Application.GetResourceStream(new Uri(filePath, UriKind.Relative));
        if (ResrouceStream != null)
        {
            Stream myFileStream = ResrouceStream.Stream;
            if (myFileStream.CanRead)
            {
                StreamReader myStreamReader = new StreamReader(myFileStream);

                return myStreamReader.ReadToEnd();
            }
        }
        return "";
    }
}

然后我可以使用函数这种方式（在此例如，文件所在文件夹的资产中）：

Then I can use that function this way (in this example the file resides under Assets folder) :

var textFileContent = FileHelper.ReadFile(@"Assets\MyTextFile.txt");

这篇关于的Windows Phone 8 - 阅读和项目在现有的TXT文件写入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！