根据修改日期列出文件时出错。 [英] Has Error for list the files according to the date modified.

问题描述

嗨朋友们，



当我对修改日期进行c＃编码时出错。我已经用2天来解决问题，但仍然有错误。有显示5错误，这是;



1.System.Collections.Generic.IEnumerable< string>'不包含'Length'的定义，也没有扩展名方法'Length'接受类型'System.Collections.Generic.IEnumerable< string>'的第一个参数可以找到（你是否缺少using指令或汇编引用？）



2.System.Collections.Generic.IEnumerable< string>'不包含'Length'的定义，也没有扩展方法'Length'接受类型'System.Collections.Generic.IEnumerable< string>类型的第一个参数'可以找到（你错过了使用指令或程序集引用吗？）



3.无法使用[]将索引应用于'System.Collections类型的表达式.Generic.IEnumerable< string>



4.最佳重载方法匹配'System.Array.Sort< System.DateTime>（System.DateTime []，System .Comparison< ; System.DateTime>）'有一些无效的参数



5.Argument 2：无法从'System.Collections.Generic.IEnumerable< string>'转换为'系统。比较< System.DateTime>'



代码;

Hi Friends,

I have error when i doing c# coding for the date modified. I m already use 2 days for settle the problem, but still have error. There are shows 5 error, which is;

1.System.Collections.Generic.IEnumerable<string>' does not contain a definition for 'Length' and no extension method 'Length' accepting a first argument of type 'System.Collections.Generic.IEnumerable<string>' could be found (are you missing a using directive or an assembly reference?)

2.System.Collections.Generic.IEnumerable<string>' does not contain a definition for 'Length' and no extension method 'Length' accepting a first argument of type 'System.Collections.Generic.IEnumerable<string>' could be found (are you missing a using directive or an assembly reference?)

3.Cannot apply indexing with [] to an expression of type 'System.Collections.Generic.IEnumerable<string>

4.The best overloaded method match for 'System.Array.Sort<System.DateTime>(System.DateTime[], System.Comparison<System.DateTime>)' has some invalid arguments

5.Argument 2: cannot convert from 'System.Collections.Generic.IEnumerable<string>' to 'System.Comparison<System.DateTime>'

Code;

protected void Button1_Click(object sender, EventArgs e)
        {
            ListBox1.Items.Clear();
            string search = TextBox1.Text; // here type the folder name
            if (search != "")
            {
                string[] ext = new string[] { ".jpg", ".gif", ".png",".PNG", ".GIF", ".JPG", ".bmp", ".BMP" };
                var directory = new DirectoryInfo(@"\\192.168.0.56\Test\Report\");
                var files = Directory.GetFiles(directory + search, "*.*", SearchOption.AllDirectories).Where(s => ext.Any(n => s.EndsWith(n)));
                
                DateTime[] creationtime = new DateTime[files.Length]; //**Error on "Length"
                for (int i = 0; i < files.Length; i++) //**Error on "Length"
                    creationtime[i] = new FileInfo(files[i]).CreationTime; //**Error on "files[i]"
                Array.Sort(creationtime, files); //**Error all line

                    foreach (string file in files)
                    {
                        ListBox1.Items.Add(new ListItem(Path.GetFileName(file), file)); // listed all files in the search folder
                    }
                {
                    search = "";
                }
            }
            else
            {
                Response.Write("<script>alert('Please Enter Search Keyword');</script>");
            }
        }

请帮助我......我真的需要帮助...给我任何建议避免错误......

Please help me...i m really need help...give me any suggestion to avoid the error...

推荐答案

整改代码

Rectified code

protected void Button1_Click(object sender, EventArgs e)
    {
        ListBox1.Items.Clear();
        string search = TextBox1.Text; // here type the folder name
        if (search != "")
        {
            string[] ext = new string[] { ".jpg", ".gif", ".png", ".PNG", ".GIF", ".JPG", ".bmp", ".BMP" };
            var directory = new DirectoryInfo(@"\\192.168.0.56\Test\Report\");
            var files = Directory.GetFiles(directory + search, "*.*", SearchOption.AllDirectories).Where(s => ext.Any(n => s.EndsWith(n)));
            

            DateTime[] creationtime = new DateTime[files.Count()]; //**Solve Error on "Length"
            for (int i = 0; i < files.Count(); i++) //**Solve Error on "Length"
                creationtime[i] = new FileInfo(files.ElementAt(i)).CreationTime; //**Solve Error on "files[i]"
            Array.Sort(creationtime, files.ToArray()); //**Solve Error all line

            foreach (string file in files)
            {
                ListBox1.Items.Add(new ListItem(Path.GetFileName(file), file)); // listed all files in the search folder
            }
            {
                search = "";
            }
        }
        else
        {
            Response.Write("<script>alert('Please Enter Search Keyword');</script>");
        }
    }

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