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asp.net(C#)读取文件夹和子文件夹下所有文件,绑定到GRIDVIEW并排序 .

2020-03-01 16:09 176 查看

Asp部分:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="MyFiles_List.aspx.cs" Inherits="lbWeb.webAdmin.MyFiles_List" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

 

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

    <title>无标题页</title>

        <script language="javascript" type="text/javascript">   

function selectAll(obj)    {   

       var theTable = obj.parentElement.parentElement.parentElement;     

       var i;    

       var j = obj.parentElement.cellIndex;       

       for(i=0;i<theTable.rows.length;i++)    

      {          

         var objCheckBox = theTable.rows[i].cells[j].firstChild;   

         if(objCheckBox.checked!=null)objCheckBox.checked = obj.checked;    

      }  

}  

 </script>

</head>

<body>

    <form id="form1" runat="server">

    <div>

    <table width="100%">

      <tr>

        <td>

        文件管理       

        </td>

      </tr>

      <tr>

        <td>

             <asp:GridView Width="100%" runat="server" ID="gridFileList"

                 AutoGenerateColumns="false" CellPadding="4" ForeColor="#333333"

                 GridLines="None" OnRowDataBound="gridFileList_RowDataBound" AllowPaging="True"

                 PageSize="6" OnPageIndexChanging="gridFileList_PageIndexChanging"

                 AllowSorting="True" onsorting="gridFileList_Sorting" >

        <Columns>

        <asp:TemplateField>

        <ItemStyle HorizontalAlign="Center" />

                <HeaderTemplate>&nbsp;<input id="CheckAll" type="checkbox" οnclick="selectAll(this);" />全选</HeaderTemplate>              

                <ItemTemplate>

                    <asp:CheckBox runat="server" ID="chkDel" />

                </ItemTemplate>

            </asp:TemplateField>

            <asp:TemplateField HeaderText="序号" InsertVisible="False">

              <ItemStyle HorizontalAlign="Center" />

             <ItemTemplate>

                 <asp:Label ID="Label2" runat="server" Text='<%# this.gridFileList.PageIndex * this.gridFileList.PageSize + this.gridFileList.Rows.Count + 1%>'/>

            </ItemTemplate>

            </asp:TemplateField> 

             <asp:TemplateField HeaderText="图片" InsertVisible="False">

              <ItemStyle HorizontalAlign="Center" />

             <ItemTemplate>

                 <asp:Image ID="ImgPath" runat="server" Width="150" Height="80" />

            </ItemTemplate>

            </asp:TemplateField> 

           <asp:BoundField DataField="FileName" HeaderText="名称" SortExpression="FileName" >

                <ItemStyle HorizontalAlign="Center" />

            </asp:BoundField> 

            <asp:BoundField DataField="FileLength" HeaderText="大小" SortExpression="FileLength" >

                <ItemStyle HorizontalAlign="Center" />

            </asp:BoundField> 

           <asp:BoundField DataField="FilePath" ShowHeader="false">

                <ItemStyle HorizontalAlign="Center" />

            </asp:BoundField>

            <asp:BoundField DataField="FileLastWriteTime" HeaderText="修改时间" SortExpression="FileLastWriteTime" >

                <ItemStyle HorizontalAlign="Center" />

            </asp:BoundField> 

        </Columns>

    </asp:GridView>

        </td>

      </tr>

              <tr>

            <td align="center" class="sub_bg">

           

            <asp:Button runat="server" ID="btnAdd" Text="添 加" OnClick="btnAdd_Click" />&nbsp;

            <asp:Button runat="server" ID="btnDel" Text="删 除" OnClick="btnDel_Click" OnClientClick="return confirm('提示:确定要删除吗?');" />

            </td>

        </tr>

     </table>

    </div>

    </form>

</body>

</html>

 

 

CS部分:

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.IO;

using System.Text;

 

namespace lbWeb.webAdmin

{

    public partial class MyFiles_List : System.Web.UI.Page

    {

        protected string File_List="";

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                //设定初始排序字段为文件修改时间FileLastWriteTime

                gridFileList.Attributes.Add("SortExpression", "FileLastWriteTime");

                gridFileList.Attributes.Add("SortDirection", "DESC");     

                BindGrid();

            }

        }

        ///<summary>

        ///要显示的文件扩展名

        ///</summary>

        ///<param name="type"></param>

        ///<returns></returns>

        public bool checkFileType(string type)

        {

            bool FileType = false;

            string[] type_ = new string[4];

            type = type.ToLower();

            type_[0] = ".jpg";

            type_[1] = ".gif";

            type_[2] = ".jpeg";

            type_[3] = ".png";

            //可在此添加上传文件的后缀名

            for (int i = 0; i < type_.Length; i++)

            {

                if (type.Contains(type_[i].ToString()))

                {

                    FileType = true;

                }

            }

            return FileType;

        }

        ///<summary>

        ///遍文件夹下的所有子文件夹下的文件

        ///</summary>

        ///<param name="ObjDirPath">文件夹</param>

        public void GetFiles(string ObjDirPath)

        {

            DirectoryInfo SourceDir = new DirectoryInfo(ObjDirPath);

 

            foreach (FileSystemInfo FSI in SourceDir.GetFileSystemInfos())

            {

                if (FSI is DirectoryInfo)

                {

                    //如果是文件夹则递归

                    GetFiles(FSI.FullName);

                }

                else

                {

                    //如果是符合要求的文件则垒加集合,因为我只要求显示图片文件,在checkFileType方法里定义要显示文件的扩展名

                    if (checkFileType(FSI.Extension))

                    {

                        //由于是物理路径,如e:/luobing_web/uploadfiles/picture/test.jpg这种形式,需要提取虚拟路径,如:../uploadfiles/picture/test.jpg

                        string FilePath = ""; //一步写来看起混乱,就分开写了

                        FilePath = FSI.FullName.ToLower();

                        FilePath = FilePath.Substring(FilePath.LastIndexOf("uploadfiles//"));

                        FilePath = "../"+FilePath.Replace("//", "/");//这里在路径前加了../,因为我的项目里页面文件和上传文件夹不是同级文件夹

                        File_List += FilePath + ",";

                    }

                }

            }

        }

        ///<summary>

        ///构造DataTABLE来绑定GRIDVIEW

        ///</summary>

        ///<returns></returns>

        public DataTable FileDataTable()

        {

            GetFiles(Server.MapPath(@"~/UploadFiles/"));

            //构造DataTABLE

            DataTable dt = new DataTable();

            dt.Columns.Add(new DataColumn("FilePath", typeof(string)));

            dt.Columns.Add(new DataColumn("FileName", typeof(string)));

            dt.Columns.Add(new DataColumn("FileLength", typeof(string)));

            dt.Columns.Add(new DataColumn("FileLastWriteTime", typeof(string)));

            DataRow dr;

            //将文件数组集合切割到数组

            string[] dtaArry = File_List.Split(',');

            for (int i = 0; i < dtaArry.Length; i++)

            {

                if (dtaArry[i].Trim() != "")//防空元素

                {

                    dr = dt.NewRow();

                    dr[0] = dtaArry[i];//文件路径

                    dr[1] = Path.GetFileName(dtaArry[i]);//文件名

                    //获取文件大小

                    FileInfo FI = new FileInfo(Server.MapPath(@dtaArry[i]));

                    dr[2] = Convert.ToString(FI.Length / 1000)+"KB";//获取的是字节byte,还需要转换为千字节KB

                    dr[3] = FI.LastWriteTime;

                    dt.Rows.Add(dr);

                }

            }

            return dt;

        }

 

        ///<summary>

        ///绑定gridview

        ///</summary>

        private void BindGrid()

        {

            //获取数据源

            DataTable dtb = FileDataTable();

            //排序

            string SortDirection = gridFileList.Attributes["SortDirection"].ToString();

            string SortExpression = gridFileList.Attributes["SortExpression"].ToString();

            dtb.DefaultView.Sort = string.Format("{0} {1}", SortExpression, SortDirection);

            //赋数据源并绑定

            gridFileList.DataSource = dtb;

            gridFileList.DataBind();

        }

        ///<summary>

        ///添加

        ///</summary>

        ///<param name="sender"></param>

        ///<param name="e"></param>

        protected void btnAdd_Click(object sender, EventArgs e)

        {

            Response.Redirect("MyFiles_Add.aspx");

        }

        ///<summary>

        ///删除

        ///</summary>

        ///<param name="sender"></param>

        ///<param name="e"></param>

        protected void btnDel_Click(object sender, EventArgs e)

        {

            try

            {

                FileInfo fileinfo;

                bool IsSelect = false;

                for (int i = 0; i < gridFileList.Rows.Count; i++)

                {

                    GridViewRow row = gridFileList.Rows[i];

                    if (((CheckBox)row.FindControl("chkDel")).Checked)

                    {

                        IsSelect = true;

                        Image Img = (Image)gridFileList.Rows[i].Cells[0].FindControl("ImgPath");

                        fileinfo = new FileInfo(Request.MapPath(@Img.ImageUrl));

                        if (fileinfo.Exists)

                        {

                            fileinfo.Delete();

                        }

                    }

                }

                if (IsSelect)

                {

                    ValueChecked.MessageBox(Page, "删除成功!");

                }

                else

                {

                    ValueChecked.MessageBox(Page, "请选择要删除的行!");

                }

            }

            catch

            {

                ValueChecked.MessageBox(Page, "删除失败!");

            }

 

            BindGrid();

        }

        ///<summary>

        ///绑定数据行

        ///</summary>

        ///<param name="sender"></param>

        ///<param name="e"></param>

        protected void gridFileList_RowDataBound(object sender, GridViewRowEventArgs e)

        {

            if (e.Row.RowType == DataControlRowType.DataRow)

            {

                Image Img = (Image)e.Row.Cells[0].FindControl("ImgPath");

                Img.ImageUrl = e.Row.Cells[5].Text;

                e.Row.Cells[5].Text="";

            }

        }

        ///<summary>

        ///分页

        ///</summary>

        ///<param name="sender"></param>

        ///<param name="e"></param>

        protected void gridFileList_PageIndexChanging(object sender, GridViewPageEventArgs e)

        {

            gridFileList.PageIndex = e.NewPageIndex;

            this.BindGrid();

        }

 

        ///<summary>

        ///排序

        ///</summary>

        ///<param name="sender"></param>

        ///<param name="e"></param>

        protected void gridFileList_Sorting(object sender, GridViewSortEventArgs e)

        {

            string sortExpression = e.SortExpression.ToString();

            string sortdirection = "ASC";

            if (sortExpression == gridFileList.Attributes["SortExpression"])

            {

                sortdirection = (gridFileList.Attributes["SortDirection"].ToString() == sortdirection ? "DESC" : "ASC");

            }

            gridFileList.Attributes["SortExpression"] = sortExpression;

            gridFileList.Attributes["SortDirection"] = sortdirection;

            this.BindGrid();

        }

    }

}

转载于:https://www.cnblogs.com/beidao/archive/2012/11/07/2758994.html

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