如何将文本框的值指定为文件名 [英] How do I assign the value of a textbox as a filename

问题描述

我正在写一个小文件应用程序。



我有两个文本框，textBox1适用于输入文件的注释，这将创建一个.txt文件。



第二个是从文件中读取。我需要将 TextBox1 的值赋给变量（ filename ），以便它动态命名文本文件。我可能会以错误的方式解决这个问题。任何帮助将不胜感激。下面是代码。等待回复。

I writing a small file application.

I have two text boxes, "textBox1" is for entering a note for a file, this creates a .txt file.

Second one is to read from the file. I need to assign the value of TextBox1 to a variable(filename) so that it will name the text file dynamically. I may be going about this the wrong way. Any help will be greatly appreciated. Below is the code. Waiting for some reply.

private void btnWrite_Click(object sender, EventArgs e)
 {
     String filename = textbox1.Text;
      // write a line of text to the file
     TextWriter te = new StreamWriter(???);
      // close the stream
     te.Close();
 }

 private void btnRead_Click(object sender, EventArgs e)
 {
     // create reader & open file
     TextReader tr = new StreamReader(???);

     // read a line of text
     txtRead.Text = tr.ReadLine();

     // close the stream
     tr.Close();
 }

推荐答案

你可以试试

You can try

private void btnWrite_Click(object sender, EventArgs e)
{
//Application.StartupPath gives the path of the executable file of the application.
    String filename = string.Format("{0}\{1}.txt",Application.StartupPath, textbox1.Text);
    string textToWrite = "Assign the text to write here";
    File.WriteAllText(filename, textToWrite);

    //You can use
    //File.AppendAllText(filename, textToWrite);
    //to append the text to the end of an existing file

}
private void btnRead_Click(object sender, EventArgs e)
{
    String filename = String filename = string.Format("{0}\{1}.txt",
                Application.StartupPath, textbox1.Text);
    string textFromFile = File.ReadAllText(filename);
}

你面临什么问题？你收到任何错误吗？



如果你想知道如何使用StreamReader和StreamWriter进行读写，请参考 this [ ^ ]





----- ------更新--------------------

Chech 这个 [ ^ ]

What problem are you facing? Are you getting any error?

If you want to know how to read and write using StreamReader and StreamWriter then refer this[^]


-----------Updated--------------------
Chech this[^]

您的代码被重构为：

Your code is refactored as:

private void btnWrite_Click(object sender, EventArgs e)
 {
     String filename = textbox1.Text;
      // write a line of text to the file
     TextWriter te = new StreamWriter(???);
     using (StreamWriter writer = new StreamWriter(filename))
     {
           writer.Write("content to be written");
           // close the stream
           writer.Close();
     }
 }

private void btnRead_Click(object sender, EventArgs e)
{
    // create reader & open file
    TextReader tr = new StreamReader(???);


	using (StreamReader reader = new StreamReader(filename))
	{
	        // read a line of text
	        txtRead.Text = reader.ReadLine();

           // close the stream
           reader.Close();
	}
}

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