C# winform 怎样给textBox1一行一行地增加数据?

[lcmlhs_2005]

如题：我想给temBox1一行一行地增加数据，怎么弄？textBox1.Lines[2] = "aaa";这样为什么不行？？？？？、

[symbol_bc]

//首先，应设textbox可多行显示Multiline = true;
 private void button1_Click(object sender, EventArgs e)
        {
            this.textBox1.Text = "1111\r\n2222\r\n";
        }

[xsi640]

lines是数组不能直接操作

//将textbox1.lines转成集合
List<string> lists = this.textBox1.Lines.ToList<string>();
//添加一行
lists.Add("asdadaadad");

this.textBox1.Lines = lists.ToArray();

[pcable]

[Quote=引用 1 楼 symbol_bc 的回复:]

C# code

//首先，应设textbox可多行显示Multiline = true;
private void button1_Click(object sender, EventArgs e)
{
this.textBox1.Text = "1111\r\n2222\r\n";
}
[/Quote]

应该 this.textBox1.Text += "1111\r\n2222\r\n";吧

[兔子-顾问]

[Localizable(true), SRDescription("TextBoxLinesDescr"), Editor("System.Windows.Forms.Design.StringArrayEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor)), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), MergableProperty(false), SRCategory("CatAppearance")]
public string[] Lines
{
    get
    {
        int num2;
        string text = this.Text;
        ArrayList list = new ArrayList();
        for (int i = 0; i < text.Length; i = num2)
        {
            num2 = i;
            while (num2 < text.Length)
            {
                char ch = text[num2];
                if ((ch == '\r') || (ch == '\n'))
                {
                    break;
                }
                num2++;
            }
            string str2 = text.Substring(i, num2 - i);
            list.Add(str2);
            if ((num2 < text.Length) && (text[num2] == '\r'))
            {
                num2++;
            }
            if ((num2 < text.Length) && (text[num2] == '\n'))
            {
                num2++;
            }
        }
        if ((text.Length > 0) && ((text[text.Length - 1] == '\r') || (text[text.Length - 1] == '\n')))
        {
            list.Add("");
        }
        return (string[]) list.ToArray(typeof(string));
    }
    set
    {
        if ((value != null) && (value.Length > 0))
        {
            StringBuilder builder = new StringBuilder(value[0]);
            for (int i = 1; i < value.Length; i++)
            {
                builder.Append("\r\n");
                builder.Append(value[i]);
            }
            this.Text = builder.ToString();
        }
        else
        {
            this.Text = "";
        }
    }
}
 

看看Lines的定义。

[兔子-顾问]

所以，只能是
string[] lines = textBox1.Lines;
lines[2] = "aaa";
textBox1.Lines = lines;

[hejialin666]

textBox1.AppendText("\r\n" + strText);
textBox1.AppendText(strText + "\r\n");

[RLMLover]

3楼正解