default.aspx.cs

这是asp.net^和Visual C++Sharp编写的串并口通讯的书籍 源代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.IO;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            TextBox1.Text = DateTime.Now.ToShortDateString()+DateTime.Now.Hour.ToString() + "H.mdb";
            this.DataBindList();
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (!File.Exists(Server.MapPath(@"~\bakDataBase\" + TextBox1.Text)))
        {
            File.Copy(Server.MapPath(@"~\App_Data\Test.mdb"), Server.MapPath(@"~\bakDataBase\" + TextBox1.Text));
            this.DataBindList();
            Response.Write("数据备份成功！");
        }
        else
        {
            Response.Write("备份文件已经存在，请重新命名！！！");
        }
    }
    public void DataBindList()
    {
        DropDownList1.Items.Clear();
        DataTable dt = new DataTable();
        dt.Columns.Add(new DataColumn("fileName", typeof(string)));
        DirectoryInfo dir = new DirectoryInfo(Server.MapPath(@"~\bakDataBase\"));
        foreach (FileInfo file in dir.GetFiles())
        {
            DataRow dr = dt.NewRow();
            dr[0] = file;
            dt.Rows.Add(dr);
        }
        DropDownList1.DataSource = dt;
        DropDownList1.DataTextField = "fileName";
        DropDownList1.DataBind();
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        File.Copy(Server.MapPath(@"~\bakDataBase\" + DropDownList1.SelectedItem.Text), Server.MapPath(@"~\App_Data\Test.mdb"), true);
        Response.Write("数据恢复成功！");
    }
}