asp.net相关的一些代码

显示目录下的内容

using System.IO;

 DirectoryInfo di = new DirectoryInfo(Server.MapPath("Views/video"));
        FileSystemInfo[] dis = di.GetFileSystemInfos();
  
        for (int i = 0; i < dis.Length; i++)
        {
          Response.Write(dis[i].Name+dis[i].CreationTime+"<p>");

         }

 得到CheckBoxList中选中的值

public string getcheck(CheckBoxList checkList, string separator)
    {
        string selval = "";
        for (int i = 0; i < checkList.Items.Count; i++)
        {
            if (checkList.Items[i].Selected)
            {
                selval +=  checkList.Items[i].Text + separator;
            }
        }
        if (selval.Length > 1)
        {
            selval = selval.Substring(0, selval.Length - 1);
        }
        return selval;
    }

asp.net分页

html

<div class="textdiv">
        当前面页为【<asp:Label ID="labPage" runat="server" Text="1"></asp:Label>】 
        总页数据【<asp:Label ID="labBackPage" runat="server" Text="10"></asp:Label>】 
        <asp:linkbutton ID="lnkbtnOne" runat="server" Text="第一页" OnClick="lnkbtnOne_Click"></asp:linkbutton> 
        <asp:linkbutton ID="lnkbtnUp" runat="server" Text="上一页" OnClick="inkbtnUp_Click"></asp:linkbutton> 
        <asp:linkbutton ID="lnkbtnNext" runat="server" Text="下一页" OnClick="lnkbtnNext_Click"></asp:linkbutton> 
        <asp:linkbutton ID="lnkbtnBack" runat="server" Text="最底页" OnClick="lnkbtnBack_Click"></asp:linkbutton> 
</div>

  cs:

    protected void Page_Load(object sender, EventArgs e)
    {
        dlBind();

    }
    protected void dlBind()
    {
        int curpage = Convert.ToInt32(this.labPage.Text);
        PagedDataSource ps = new PagedDataSource();
        //数据库连接数据,并打开
        OleDbConnection oCon = new OleDbConnection(ConfigurationManager.AppSettings["accessCon"]);
        oCon.Open();
        string maintenance_sql = "select a.ID,c.shop_name,b.branch_name,a.maintenance_time,a.maintenance_content,a.maintenance_state,a.shop_id from maintenance a,branch b,shop_name c where a.shop_id=c.id and c.shop_branch=b.branch_id ORDER BY a.maintenance_time";
        //执行查询得到用于匹配数据集的数据
        OleDbDataAdapter maintenance_date = new OleDbDataAdapter(maintenance_sql, oCon);
        //声明内存中的一个表
        DataSet myda = new DataSet();
        //将数据存于内存表中
        maintenance_date.Fill(myda, "maintenance");
        ps.DataSource = myda.Tables["maintenance"].DefaultView;
        ps.AllowPaging = true;
        ps.PageSize = 20;
        ps.CurrentPageIndex = curpage -1;
        this.lnkbtnBack.Enabled = true;
        this.lnkbtnNext.Enabled = true;
        this.lnkbtnOne.Enabled = true;
        this.lnkbtnUp.Enabled = true;
        if (curpage == 1)
        {
            this.lnkbtnOne.Enabled = false;
            this.lnkbtnUp.Enabled = false;    
        }
        if (curpage == ps.PageCount)
        {
            this.lnkbtnBack.Enabled = false;
            this.lnkbtnNext.Enabled = false;

        }
        this.labBackPage.Text = Convert.ToString(ps.PageCount);
          //指定repeater的数据源为myda
        this.maintenance_repeater1.DataSource = ps;
        //匹配repeater中的子控件绑定,aspx页面上用<%# DataBinder.Eval(Container.DataItem, "maintenance_time")%>显示相关字段
        this.maintenance_repeater1.DataBind();
        oCon.Close();
    }
    protected void lnkbtnOne_Click(object sender, EventArgs e)
    {
        this.labPage.Text = "1";
        dlBind();
    }
    protected void inkbtnUp_Click(object sender, EventArgs e)
    {
        this.labPage.Text = Convert.ToString( Convert.ToInt32(this.labPage.Text) - 1);
        dlBind();
     }
    protected void lnkbtnNext_Click(object sender, EventArgs e)
    {
        this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) +1 );
        dlBind();
    }
    protected void lnkbtnBack_Click(object sender, EventArgs e)
    {
        this.labPage.Text = this.labBackPage.Text;
        dlBind();
    }

检文件的MD5

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show(GetMD5HashFromFile("d:\Hash_1.0.4.exe"));
        }

     public static string GetMD5HashFromFile(string filePath)
        {
            try
            {
                FileStream file = new FileStream(filePath, FileMode.Open);
                System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
                byte[] retVal = md5.ComputeHash(file);
                file.Close();
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < retVal.Length; i++)
                {
                    sb.Append(retVal[i].ToString("x2"));
                }
                return sb.ToString().ToUpper();
            }
            catch (Exception ex)
            {
                throw new Exception("GetMD5HashFromFile() fail,error:" + ex.Message);
            }
        }

删除目录下的文件

        private void button1_Click(object sender, EventArgs e)
        {
            string path = "d:\bb";
            if (Directory.Exists(path))
            Directory.Delete(path, true); 
            Directory.CreateDirectory(path);
          }