asp.net HTML文件上傳標簽
2024-07-10 13:21:22
供稿：網(wǎng)友
微軟提供的控件
前臺
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>html文件上傳標簽</title>
</head>
<body>
<form runat="server">
<div>
<input type="file" runat="server" />
<asp:Button runat="server" Text="上傳" />
</div>
</form>
</body>
</html>
后臺
protected void btn_up_Click(object sender, EventArgs e)
{
string spath = Server.MapPath("~/test/");
string filename = File1.PostedFile.FileName;
int idx = filename.LastIndexOf(@"/");
string shortname = filename.Substring(idx + 1);//獲得文件名
this.File1.PostedFile.SaveAs(spath + shortname);
}
end
官方給出的使用方法：
需要在要目錄下新建兩個目錄:upfile和upimg
添加一個FileUpload控件.一個Button.一個Image.一個Label
關鍵代碼:
string name = FileUpload1.FileName;//獲得上傳文件的名字.
string size = FileUpload1.PostedFile.ContentLength.ToString();//文件大小.
string type = FileUpload1.PostedFile.ContentType;//文件類型.
string type2 = name.Substring(name.LastIndexOf(".") + 1);//LastIndexOf()最后一個索引位置匹配.Substring()里面的+1是重載.
string ipath = Server.MapPath("upimg") + "http://" + name;//取得根目錄下面的upimg目錄的路徑.
string fpath = Server.MapPath("upfile") + "http://" + name;
string wpath = "upimg//" + name;//獲得虛擬路徑.
if (type2 == "jpg" || type2 == "gif" || type2 == "bmp" || type2 == "png")
{
FileUpload1.SaveAs(ipath);//保存方法,參數(shù)是一個地址字符串.
Image1.ImageUrl = wpath;
Label1.Text = "你傳的文件名是:" + name + "<br>文件大小為:" + size + "字節(jié)<br>文件類型是:" + type +
"<br>后綴是:" + type2 + "<br>實際路徑是:" + ipath + "<br>虛擬路徑是:" + fpath;
Image1.Visible = true;
}
else
{
Image1.Visible = false;
FileUpload1.SaveAs(fpath);
Label1.Text = "你傳的文件名是:" + name + "<br>文件大小為:" + size + "字節(jié)<br>文件類型是:" + type +
"<br>后綴是:" + type2 + "<br>實際路徑是:" + ipath + "<br>虛擬路徑是:" + fpath;
}
