upfile.aspx.cs

ASP C#代码实例 适合初学人士学习使用

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;

namespace Example_11_1
{
	/// <summary>
	/// Summary description for WebForm1.
	/// </summary>
	public class upFile : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button SureBtn;
		protected System.Web.UI.HtmlControls.HtmlInputFile upfile;
		protected System.Web.UI.WebControls.Label sucessMassage;
		protected System.Web.UI.WebControls.TextBox FileName;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// Put user code to initialize the page here
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.SureBtn.Click += new System.EventHandler(this.SureBtn_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void SureBtn_Click(object sender, System.EventArgs e)
		{
			if(FileName.Text.Trim() != "")
			{
				if((upfile.PostedFile.ContentLength > 0)&&(upfile.Value.ToString() != ""))
				{
					String fileName = upfile.PostedFile.FileName.Substring(upfile.PostedFile.FileName.LastIndexOf("\\"),
						upfile.PostedFile.FileName.Length - upfile.PostedFile.FileName.LastIndexOf("\\"));

					String fileTime = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() 
						+ DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() 
						+ DateTime.Now.Second.ToString() + DateTime.Now.Minute.ToString()
						+ DateTime.Now.Millisecond.ToString();

					fileName = "\\" + fileTime + GetRandomint() + fileName.Substring(fileName.IndexOf("."),fileName.Length - fileName.IndexOf("."));
              
					if(File.Exists(Server.MapPath(Request.ApplicationPath) + "\\UpLoads" + fileName) == false)
					{
						try
						{ 							
							upfile.PostedFile.SaveAs(Server.MapPath(Request.ApplicationPath) + "\\UpLoads" + fileName);

							FileDB file = new FileDB();
							file.AddFile(FileName.Text.Trim(),"\\UpLoads" + fileName,upfile.PostedFile.ContentType);
                                
							sucessMassage.Visible = true;
						}
						catch(Exception ex)
						{
							sucessMassage.Visible = true;
							sucessMassage.Text = "由于网络原因，上载文件错误  " + ex.Message;
						}

						//
						FileName.Text = "";
					}
					else
					{
						sucessMassage.Visible = true;
						sucessMassage.Text = "你上载文件的文件名称已经存在，请更改你的文件名称！";
					}
				}
				else
				{
					sucessMassage.Visible = true;
					sucessMassage.Text = "文件的内容不能为空！";
				}
			}
			else
			{
				sucessMassage.Visible = true;
				sucessMassage.Text = "文件的名称不能为空！";
			}

		}

		private String GetRandomint()
		{
			Random random = new Random();

			return(random.Next(10000).ToString());
		}

	}
}