wpf 在 C# 中创建和保存文件
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Creating and saving files in C#
提问by Eric after dark
I need to create and write to a .dat file. I'm guessing that this is pretty much the same process as writing to a .txt file, but just using a different extension.
我需要创建并写入 .dat 文件。我猜这与写入 .txt 文件的过程几乎相同，但只是使用不同的扩展名。
In plain english I would like to know how to:
用简单的英语，我想知道如何：
-Create a .dat file
- 创建一个 .dat 文件
-Write to it
- 写信给它
-And save the file using SaveFileDialog
- 并使用保存文件 SaveFileDialog
There are a few pages that I've been looking at, but I think that my best explanation will come from this site because it allows me to state exactly what I need to learn.
我一直在查看一些页面，但我认为我最好的解释来自这个站点，因为它允许我准确地说明我需要学习的内容。
The following code is what I have at the moment. Basically it opens a SaveFileDialogwindow with a blank File:section. Mapping to a folder and pressing save does not save anything because there is no file being used. Please help me use this to save files to different locations.
以下代码是我目前所拥有的。基本上它会打开一个SaveFileDialog带有空白File:部分的窗口。映射到文件夹并按保存不会保存任何内容，因为没有使用文件。请帮助我使用它来将文件保存到不同的位置。
Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog();
dlg.FileName = "";
dlg.DefaultExt = "";
Nullable<bool> result = dlg.ShowDialog();
if (result == true)
{
string filename = dlg.FileName;
}
Pages that I've been looking at:
我一直在看的页面：
-http://msdn.microsoft.com/en-us/library/8bh11f1k.aspx
- http://msdn.microsoft.com/en-us/library/8bh11f1k.aspx
-http://msdn.microsoft.com/en-us/library/system.io.file.createtext(v=vs.110).aspx
- http://msdn.microsoft.com/en-us/library/system.io.file.createtext(v=vs.110).aspx
回答by Olivier Jacot-Descombes
Note that the SaveFileDialogonly yields a filename but does not actually save anything.
请注意，SaveFileDialog仅生成文件名但实际上并未保存任何内容。
var sfd = new SaveFileDialog {
Filter = "Text Files (*.txt)|*.txt|All files (*.*)|*.*",
// Set other options depending on your needs ...
};
if (sfd.ShowDialog() == true) { // Returns a bool?, therefore the == to convert it into bool.
string filename = sfd.FileName;
// Save the file ...
}
Use the filename you are getting from the SaveFileDialogand do the following:
使用您从 中获得的文件名SaveFileDialog并执行以下操作：
File.WriteAllText(filename, contents);
That's all if you intend to write text to the file.
如果您打算将文本写入文件，这就是全部。
You can also use:
您还可以使用：
File.WriteAllLines(filename, contentsAsStringArray);
回答by Rick S
using(StreamWriter writer = new StreamWriter(filename , true))
{
writer.WriteLine("whatever your text is");
}
