default.aspx.cs

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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;
public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string name = TextBox1.Text.ToString();
        string types = DropDownList1.SelectedValue.ToString();
        string path = Server.MapPath(".") + "\\" + name + types;
        if (!File.Exists(path))
        {
            File.Create(path);
            Page.RegisterStartupScript("系统提示", "<script>alert('创建成功')</script>");
        }
        else
        {
            Page.RegisterStartupScript("系统提示", "<script>alert('该文件已经存在')</script>");
        }
    }
}