.net c#上传-按日期命名

来源：互联网发布：javascript初学者编辑：程序博客网时间：2024/04/27 16:02

“附件说明”边的TextBox：Id=TextBox1

“浏览”：Id=UpLoadFile

“上传”：Id=AddFile

文件目录：wwwroot/myWeb/userfiles/upload

private void AddFile_Click(object sender, System.EventArgs e)

{

if(UpLoadFile.PostedFile.FileName.Trim()!="")

{

String fileName =UpLoadFile.PostedFile.FileName.Substring(UpLoadFile.PostedFile.FileName.LastIndexOf("//")+1,UpLoadFile.PostedFile.FileName.Length-1 - UpLoadFile.PostedFile.FileName.LastIndexOf("//"));

///取到当前时间的年、月、日、分、秒和毫秒的值，并使用字符串格式把它们组合成一个字符串

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();

///在时间字符串后面添加一个随机数和文件的后缀名

String src=fileName.Substring(fileName.LastIndexOf(".")+1,fileName.Length-fileName.LastIndexOf(".")-1).ToLower();

if(src.ToLower()=="rar" || src.ToLower()=="doc" || src.ToLower()=="xls")

{

fileName =fileTime + GetRandomint() + "." + src;

///上载文件到服务器硬盘

UpLoadFile.PostedFile.SaveAs(Server.MapPath(Request.ApplicationPath) + "//userfiles//upload//" + fileName);

if(TextBox1.Text.Trim()=="")

{

FCKeditor1.Value=FCKeditor1.Value+"<a href=userfiles/upload/"+fileName+">下载附件</a><br>";

}

else

{

FCKeditor1.Value=FCKeditor1.Value+"<a href=userfiles/upload/"+fileName+">"+TextBox1.Text.ToString()+"</a><br>";

}

else

{

Response.Write("<script>alert(/"文件格式不正确，请上传格式为RAR的文件！/")</script>");

}

private String GetRandomint()

{

Random random = new Random();

return(random.Next(10000).ToString()); //产生一个小于10000的随机正整数

}