我有一个非常基本的C＃WinForms应用程序来生成随机数。代码如下所示：
private static double RandomNumber(double min, double max)
{
Random random = new Random();
var next = random.NextDouble();
return min +(next * (max - min));
}
private void btnGenerate_Click(object sender, EventArgs e)
{
var maxNum = Convert.ToDouble(txbInput.Text);
var randomDec = Math.Round(RandomNumber(0, maxNum), 2);
txbResult.Text = randomDec.ToString();
}
现在，我想要做的是在按钮上单击，保存在本地保存的文件中生成的随机数以及时间戳。
我对C＃相当陌生，并且对执行此操作的知识有限。因此，任何建议将不胜感激。
这些示例说明了将文本写入文件的各种方法。前两个示例在System.IO.File类上使用静态方法将完整的字符串数组或完整的字符串写入文本文件。Example＃3显示了在写入文件之前必须分别处理每一行时如何向文件添加文本。示例1-3全部覆盖了文件中所有现有的内容。Example＃4显示了如何将文本追加到现有文件。
class WriteTextFile
{
static void Main()
{
// These examples assume a "C:\Users\Public\TestFolder" folder on your machine.
// You can modify the path if necessary.
// Example #1: Write an array of strings to a file.
// Create a string array that consists of three lines.
string[] lines = { "First line", "Second line", "Third line" };
// WriteAllLines creates a file, writes a collection of strings to the file,
// and then closes the file.
System.IO.File.WriteAllLines(@"C:\Users\Public\TestFolder\WriteLines.txt", lines);
// Example #2: Write one string to a text file.
string text = "A class is the most powerful data type in C#. Like a structure, " +
"a class defines the data and behavior of the data type. ";
// WriteAllText creates a file, writes the specified string to the file,
// and then closes the file.
System.IO.File.WriteAllText(@"C:\Users\Public\TestFolder\WriteText.txt", text);
// Example #3: Write only some strings in an array to a file.
// The using statement automatically closes the stream and calls
// IDisposable.Dispose on the stream object.
using (System.IO.StreamWriter file = new System.IO.StreamWriter(@"C:\Users\Public\TestFolder\WriteLines2.txt"))
{
foreach (string line in lines)
{
// If the line doesn't contain the word 'Second', write the line to the file.
if (!line.Contains("Second"))
{
file.WriteLine(line);
}
}
}
// Example #4: Append new text to an existing file.
// The using statement automatically closes the stream and calls
// IDisposable.Dispose on the stream object.
using (System.IO.StreamWriter file = new System.IO.StreamWriter(@"C:\Users\Public\TestFolder\WriteLines2.txt", true))
{
file.WriteLine("Fourth line");
}
}
}
//Output (to WriteLines.txt):
// First line
// Second line
// Third line
//Output (to WriteText.txt):
// A class is the most powerful data type in C#. Like a structure, a class defines the data and behavior of the data type.
//Output to WriteLines2.txt after Example #3:
// First line
// Third line
//Output to WriteLines2.txt after Example #4:
// First line
// Third line
// Fourth line
从这里参考
本文收集自互联网，转载请注明来源。
如有侵权，请联系 [email protected] 删除。
我来说两句