代码错误消息 [英] Code error message

问题描述

为什么这段代码会返回

"line 8, Argument 1: cannot convert 
from'System.Collections.Generic.List<string>' to 'string'

我尝试过：

What I have tried:

List<string> strs1 = new List<string>();
string[] strArrays = Directory.GetFiles(str1);
for (int j = 0; j < (int)strArrays.Length; j++)
{
    strs1.Add(Path.GetFileName(strArrays[j]));
}
richTextBox1.AppendText(string.Concat("New files in folder", str1, " : "));
richTextBox1.AppendText(strs1);

推荐答案

您已将 strs1 声明为列出< string> ，但你是tr ying将它用作一个简单的字符串。您还有一个名为 str1 的其他地方声明的变量，可能会造成混淆。

You have declared strs1 as a List<string>, but you are trying to use it as a simple string. You also have a variable declared elsewhere named str1, maybe that is causing the confusion.

因为附加文本 [ ^ ]方法一个RichTextBox需要一个字符串参数。



你传递一个字符串列表

Because the AppendText [^] method of a RichTextBox expects a string parameter.

You are passing a list of strings

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