修改

Question

我想阅读单行并每隔1秒将其放入文本框中。我管理了这段代码：

private void button1_Click(object sender, EventArgs e)
{
    while ((line = file.ReadLine()) != null)
    {
        timer.Start();
    }
}

private void timer1_Tick(object sender, EventArgs e)
{
    textBox1.text += line + "\r\n";
}

但line无法访问。我也试过这样的事情：

private void button1_Click(object sender, EventArgs e)
{
    timer.Start();
}


private void timer1_Tick(object sender, EventArgs e)
{

    while ((line = file.ReadLine()) != null)
    {
        textBox1.Text += line + "\r\n";
    }

}

但它忽略了计时器间隔。还有什么我不知道如何在两个例子中停止计时器。你能给我一个提示，我可以用这个做什么？

修改

为什么此代码适用于if而不适用于while的任何想法？

 private void timer1_Tick(object sender, EventArgs e)
        {

            while ((line1 = file1.ReadLine()) != null)
            {


                while ((line2 = file2.ReadLine()) != null)
                {

                    try
                    {
                            //some code
                    }

                    catch
                    {

                            //some code
                    }

                    finally
                    {
                            //some code

                    }

                }



            }

                timer1.Stop();


        }

我想将file2中的每一行与file1中的每一行合并。

Answer 1

此代码将从给定文件（当前为c：\ myfile \ test.xml）中取一行并将其读入数组，然后启动计时器。计时器启动后，它将确定您的数据是否已满足。如果仍有数据，则将其添加到文本框中。如果没有数据，计时器将停止。您可以再次按此按钮再次重新启动该过程。

    //holds each line of the file contents
    string[] lines = null;
    //sets the current line number that you are at in the lines array
    int curline = 0;

    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        //reads all lines of files and starts the timer
        lines = File.ReadAllLines(@"C:\myfile\test.xml");
        curline = 0;
        timer1.Start();
    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        //if not end of data then insert on another line of the textbox
        if (curline < lines.Length)
        {
            textBox1.Text += lines[curline] + "\r\n";
            curline++;
        }
        else
        {
            //else stop the timer
            timer1.Stop();
        }
    }

快乐编码，杰森

Answer 2

在第二个示例中，将代码更改为以下

private void timer1_Tick(object sender, EventArgs e) {
   if((line = file.ReadLine()) != null) 
   { textBox1.Text += line + "\r\n"; 
   } 
   else
   {
    //Stop Timer here
   }
}

Answer 3

以下是解决方案：

如评论中所述，在开头和后台开始一切。首先阅读您的文件并准备一个容器。然后，启动计时器。现在每次"C:\Users\Public\TestFolder\Test.txt"，我们都会从第一行开始显示容器中的一行。我们一次又一次地继续这个过程。

注意您的文件路径。

MyFile：using System; using System.Linq; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class ExampleProgram : Form { // global variables string[] MyLines = System.IO.File.ReadAllLines(@"C:\Users\Public\TestFolder\Test.txt"); // contain all lines int MyCurrentLine = 0; public ExampleProgram() { InitializeComponent(); StartProgram(); // start the program } private void StartProgram() { timer1.Interval = 1000; // set interval in milliseconds timer1.Start(); // start timer } private void timer1_Tick(object sender, EventArgs e) { //timer1.Stop(); // first thing first - Edit: Looks like you did not need this. textBox1.Text = MyLines[MyCurrentLine % MyLines.Count()]; // display next line ++MyCurrentLine; // increment counter //timer1.Start(); // restart - Edit: And also won't need this. Less code.. Nice ! } } }

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准备编译的代码：

Authorization

结果：

Answer 4

我最好的选择:(假设myFilePath包含您正在使用的文件的路径）

       private Queue<string> _lines;

    private void button1_Click(object sender, EventArgs e)
    {
        _lines = new Queue<string>(System.IO.File.ReadAllLines(myFilePath));
        textBox1.Text = string.Empty;
        timer1.Start();
    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        if (_lines.Any())
            textBox1.Text += _lines.Dequeue() + Environment.NewLine;
        else
            timer1.Stop();
    }

定时器和while循环

修改

4 个答案: