使用C＃在富文本框中显示数据 [英] Displaying Data in Rich Textbox Using C#

问题描述

我在Windows窗体应用程序中有一个富文本框。

我想显示来自for循环的数据。我的代码是：

I have a rich textbox in a Windows Forms Application.
I want to display data from a for loop. My Code is:

ArrayList arr = new ArrayList();
                for (int i = frm; i <= to; i++)
                {
                    //I have stored the data as barcode by concatinating and adding it to arr

                    barcode = prefix + i + suffix;
                    arr.Add(barcode);
                    //MessageBox.Show(barcode);               
                }
                richTextBox1.Text = arr.ToString();
                foreach (string s in arr)
                {

                    richTextBox1.Text = s;
//WHat should i do next to display the coming output from my foreach loop to that richtextbox?
//Currently it shows the last element of my output. How to display all the list elements?

推荐答案

试试这段代码...

Try this code...

private void Form1_Load(object sender, EventArgs e)
       {
           string barcode = "";
           string prefix = "prefix";
           string suffix = "suffix";
           int frm = 0;
           int to = 10;
           ArrayList arr = new ArrayList();
           for (int i = frm; i <= to; i++)
           {

               barcode = prefix + i + suffix;
               arr.Add(barcode);
           }

           foreach (string s in arr)
           {  richTextBox1.Text  += s + Environment.NewLine;
           }
       }

首先关闭arr.ToString赢了; t帮助它只会给你类型的名称，而不是任何内容。即System.Collections.ArrayList



其次，请不要再使用ArrayList了 - 它近十年前被取代了，更安全，更灵活的通用诸如List<>之类的集合



第三，你的问题只是你每次都设置了富文本框文本，扔掉了之前的任何文本。



试试这个：

First off arr.ToString won;t help it will just give you the name of the type, rather than any of the content. Namely "System.Collections.ArrayList"

Second, please don't use ArrayList any more - it was superceded nearly ten years ago with teh much safer and more flexible generic collection such as List<>

Thirdly, your problem is simply that you are setting the rich text box text each time, throwing away any previous text.

Try this:

List<string> list = new List<string>();
for (int i = frm; i <= to; i++)
    {
    //I have stored the data as barcode by concatinating and adding it to arr

    barcode = prefix + i + suffix;
    list.Add(barcode);
    //MessageBox.Show(barcode);
    }
StringBuilder sb = new StringBuilder();
foreach (string s in list)
    {
    sb.Append(s);
    }
richTextBox1.Text = sb.ToString;

或者，如果您不再需要数据：

Or if you don't need the data again:

richTextBox1.Clear();
for (int i = frm; i <= to; i++)
    {
    richTextBox1.AppendText(string.Format("{0}{1}{2}", prefix, i, suffix));
    }

替换所有代码......

Replaces all of your code...

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