aspx.cs上传文件

时间：2021-08-13 12:35:53

aspx.cs文件

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void Button1_Click(object sender, EventArgs e)

    {

        //处理文件名

        string filename = DateTime.Now.ToString("yyyyMMddHHmmssms")+ FileUpload1.FileName;

        //把相当路径变为绝对路径

        string path = Server.MapPath(@"images\"+filename);

        //上传

        FileUpload1.SaveAs(path);

    }

    protected void Button2_Click(object sender, EventArgs e)

    {

        //处理文件名

        string filename = DateTime.Now.ToString("yyyyMMddHHmmssms") + PicLoad.FileName;

        //把相当路径变为绝对路径

        string path = Server.MapPath(@"images\" + filename);

        //上传

        PicLoad.SaveAs(path);

    }

}

aspx文件

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <title></title>

</head>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:FileUpload ID="FileUpload1" runat="server" />

&nbsp;<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="上传" />

        <br />

        <br />

        <br />

        <br />

    <a href="images/201510141440384038Chjhj#.doc">下载</a>

        <br />

        <br />

        <br />

        <br />

        <div id="localImag" style="width: 300px; height: 200px">

            <img id="preview" alt="预览图片" src="data:images/qiye.png" width="300" height="200" />

            <asp:FileUpload ID="PicLoad" Width="300px" Height="200px" style="position:relative; top:-200px; opacity:0" runat="server" onchange="javascript:setImagePreview(this,localImag,preview);"></asp:FileUpload>

        </div>

        <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="上传" />

        <script type="text/javascript">

            function setImagePreview(docObj, localImagId, imgObjPreview) {

                if (docObj.files && docObj.files[0]) {

                    //火狐下，直接设img属性

                    imgObjPreview.style.display = 'block';

                    imgObjPreview.style.width = '300px';

                    imgObjPreview.style.height = '200px';

                    //火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式

                    imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]);

                }

                else {

                    //IE下，使用滤镜

                    docObj.select();

                    var imgSrc = document.selection.createRange().text;

                    //必须设置初始大小

                    localImagId.style.width = "300px";

                    localImagId.style.height = "200px";

                    //图片异常的捕捉，防止用户修改后缀来伪造图片

                    try {

                        localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";

                        localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;

                    }

                    catch (e) {

                        alert("您上传的图片格式不正确，请重新选择!");

                        return false;

                    }

                    imgObjPreview.style.display = 'none';

                    document.selection.empty();

                }

                return true;

            }

</script>  

    </div>

    </form>

</body>

</html>

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