写的StringBuilder到流

Question

什么是写入一个StringBuilder到System.IO.Stream的最佳方法？

我目前做的：

StringBuilder message = new StringBuilder("All your base");
message.Append(" are belong to us");

System.IO.MemoryStream stream = new System.IO.MemoryStream();
System.Text.ASCIIEncoding encoding = new ASCIIEncoding();
stream.Write(encoder.GetBytes(message.ToString()), 0, message.Length);

Answer 1

不要使用StringBuilder，如果你正在写一个流，做到这一点具有的 StreamWriter的：

using (var memoryStream = new MemoryStream())
using (var writer = new StreamWriter(memoryStream ))
{
    // Various for loops etc as necessary that will ultimately do this:
    writer.Write(...);
}

Answer 2

这是最好的方法。其他明智损失的StringBuilder和使用类似以下内容：

using (MemoryStream ms = new MemoryStream())
{
    using (StreamWriter sw = new StreamWriter(ms, Encoding.Unicode))
    {
        sw.WriteLine("dirty world.");
    }
    //do somthing with ms
}

Answer 3

也许这将是有用的。

var sb= new StringBuilder("All your money");
sb.Append(" are belong to us, dude.");
var myString = sb.ToString();
var myByteArray = System.Text.Encoding.UTF8.GetBytes(myString);
var ms = new MemoryStream(myByteArray);
// Do what you need with MemoryStream

Answer 4

根据您的使用情况下，它也可能是有意义的只是一个StringWriter的启动：

StringBuilder sb = null;

// StringWriter - a TextWriter backed by a StringBuilder
using (var writer = new StringWriter())
{
    writer.WriteLine("Blah");
    . . .
    sb = writer.GetStringBuilder(); // Get the backing StringBuilder out
}

// Do whatever you want with the StringBuilder

Answer 5

如果你想使用像一个StringBuilder，因为它是清洁剂绕过而努力，那么你可以使用像我创建了下面的StringBuilder替代。

它确实不同，最重要的是，它允许访问内部数据，而不必把它组装成一个字符串或ByteArray第一。这意味着你不必加倍内存需求和风险尝试分配一个连续的内存块，它适合你的整个对象。

请注意：我相信有更好的选择，然后使用List<string>()内部但这是简单的，并证明是对我来说已经足够好

。

public class StringBuilderEx
{
    List<string> data = new List<string>();
    public void Append(string input)
    {
        data.Add(input);
    }
    public void AppendLine(string input)
    {
        data.Add(input + "\n");
    }
    public void AppendLine()
    {
        data.Add("\n");
    }

    /// <summary>
    /// Copies all data to a String.
    /// Warning: Will fail with an OutOfMemoryException if the data is too
    /// large to fit into a single contiguous string.
    /// </summary>
    public override string ToString()
    {
        return String.Join("", data);
    }

    /// <summary>
    /// Process Each section of the data in place.   This avoids the
    /// memory pressure of exporting everything to another contiguous
    /// block of memory before processing.
    /// </summary>
    public void ForEach(Action<string> processData)
    {
        foreach (string item in data)
            processData(item);
    }
}

现在可以转储整个内容使用以下代码到文件。

var stringData = new StringBuilderEx();
stringData.Append("Add lots of data");

using (StreamWriter file = new System.IO.StreamWriter(localFilename))
{
    stringData.ForEach((data) =>
    {
        file.Write(data);
    });
}