写入和读取文本文件-C#Windows通用平台应用程序Windows 10

本文关键字：平台 应用程序 Windows -C#Windows 读取 取文本 文件 | 更新日期: 2023-09-27 18:28:27

********它起作用了！但是，在显示任何内容之前，您必须在文本框中键入内容。我想这是因为我使用了"TextChanged"事件处理程序。如果我希望它在没有用户交互的情况下显示文本文件的内容，我应该使用哪个事件处理程序？********

因此，当按下按钮时，我想在C#Windows 10通用平台应用程序中的文本文件中写入一些数据，并且我想要一个TextBlock或TextBox来读取我的应用程序中该文本文件的内容。

我使用的是一个透视风格的应用程序，写文件的按钮在一个透视图上，我想包含文本文件内容的TextBlock或TextBox在另一个透视表上。

我的代码在下面。它不起作用。我甚至不确定它是否在创建和编写文件，而且我的TextBox或TextBlock中什么都没有。：（

我从这里得到代码：https://msdn.microsoft.com/en-us/library/windows/apps/mt185401.aspx

写入文件的代码：

private async void submitButton_Click(object sender, RoutedEventArgs e)
    {
        //WRITE THE TICKET TO A LOCAL DATABASE (txt)//
        //Create the text file to hold the data
        Windows.Storage.StorageFolder storageFolder =
            Windows.Storage.ApplicationData.Current.LocalFolder;
        Windows.Storage.StorageFile ticketsFile =
            await storageFolder.CreateFileAsync("tickets.txt",
                Windows.Storage.CreationCollisionOption.ReplaceExisting);
        //Write data to the file
        await Windows.Storage.FileIO.WriteTextAsync(ticketsFile, "Swift as a shadow");
    }

读取文本框中文件的代码：

private async void viewTickets_TextChanged(object sender, TextChangedEventArgs e)
    {
        Windows.Storage.StorageFolder storageFolder =
            Windows.Storage.ApplicationData.Current.LocalFolder;
        Windows.Storage.StorageFile ticketsFile =
            await storageFolder.GetFileAsync("tickets.txt");
        string savedTickets = await Windows.Storage.FileIO.ReadTextAsync(ticketsFile);
        viewTickets.Text = savedTickets; 
    }

写入和读取文本文件-C#Windows通用平台应用程序Windows 10

您的代码非常好，唯一的问题是无法执行。当您单击button时，您的文件即被创建。但是您没有在textbox中键入任何内容，因此您永远不会读取该文件。

我想你想在写完后立即阅读。把你的Read文件代码放在Write代码后面：

private async void submitButton_Click(object sender, RoutedEventArgs e)
{
    //WRITE THE TICKET TO A LOCAL DATABASE (txt)//
    //Create the text file to hold the data
    Windows.Storage.StorageFolder storageFolder = Windows.Storage.ApplicationData.Current.LocalFolder;
    Windows.Storage.StorageFile ticketsFile = await storageFolder.CreateFileAsync("tickets.txt", Windows.Storage.CreationCollisionOption.ReplaceExisting);
    //Write data to the file
    await Windows.Storage.FileIO.WriteTextAsync(ticketsFile, "Swift as a shadow");
    //read file
    string savedTickets = await Windows.Storage.FileIO.ReadTextAsync(ticketsFile);
    viewTickets.Text = savedTickets;
}

并移除CCD_ 5事件处理程序。

public async Task WriteToDictionaryAsync(Dictionary<string, string> dictionary, StorageFile binarySourceFile)
    {
        await Task.Delay(5);
        using (FileStream fs = File.OpenWrite(binarySourceFile.Path))
        using (BinaryWriter writer = new BinaryWriter(fs))
        {
            // Put count.
            writer.Write(dictionary.Count);
            // Write pairs.
            foreach (var pair in dictionary)
            {
                writer.Write(pair.Key);
                writer.Write(pair.Value);
            }
        }
    }
    public async void WriteToDictionary(Dictionary<string, string> dictionary, StorageFile binarySourceFile)
    {
        await Task.Delay(5);
        using (FileStream fs = File.OpenWrite(binarySourceFile.Path))
        using (BinaryWriter writer = new BinaryWriter(fs))
        {
            // Put count.
            writer.Write(dictionary.Count);
            // Write pairs.
            foreach (var pair in dictionary)
            {
                writer.Write(pair.Key);
                writer.Write(pair.Value);
            }
        }
    }
    public async Task<Dictionary<string, string>> ReadDictionaryAsync(StorageFile binarySourceFile)
    {
        await Task.Delay(5);
        var result = new Dictionary<string, string>();
        using (FileStream fs = File.OpenRead(binarySourceFile.Path))
        using (BinaryReader reader = new BinaryReader(fs))
        {
            // Get count.
            int count = reader.ReadInt32();
            // Read in all pairs.
            for (int i = 0; i < count; i++)
            {
                string key = reader.ReadString();
                string value = reader.ReadString();
                result[key] = value;
            }
        }
        return result;
    }
    public Dictionary<string, string> ReadDictionary(StorageFile binarySourceFile)
    {
        var result = new Dictionary<string, string>();
        using (FileStream fs = File.OpenRead(binarySourceFile.Path))
        using (BinaryReader reader = new BinaryReader(fs))
        {
            // Get count.
            int count = reader.ReadInt32();
            // Read in all pairs.
            for (int i = 0; i < count; i++)
            {
                string key = reader.ReadString();
                string value = reader.ReadString();
                result[key] = value;
            }
        }
        return result;
    }

//创建bin文件var binarySourceFile=await StorageData.LocalFolder.CreateFileAsync（"binFile"+".bin"，CreationCollisionOption.ReplaceExisting）；

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