ASP.NET 上传图片

1.单个上传，前台页面如下：

 <form id="form1" runat="server">
     <div>
        <table>
            <tr>
                <td colspan="2" style="height: 21px" >
                    使用标准HTML来进行图片上传</td>
            </tr>
            <tr>
                <td style="width: 400px">
                    <input id="InputFile" style="width: 399px" type="file" runat="server" /></td>
                <td style="width: 80px">
                    <asp:Button ID="UploadButton" runat="server" Text="上传图片" OnClick="UploadButton_Click" /></td>
            </tr>
            <tr>
                <td colspan="2" >
                    <asp:Label ID="Lb_Info" runat="server" ForeColor="Red"></asp:Label></td>                
            </tr>
        </table>    
    </div>

    </form>

　　后台代码如下

    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void UploadButton_Click(object sender, EventArgs e)
    {
        string uploadName = InputFile.Value;//获取待上传图片的完整路径，包括文件名
        //string uploadName = InputFile.PostedFile.FileName;
        string pictureName = "";//上传后的图片名，以当前时间为文件名，确保文件名没有重复
         if (InputFile.Value != "")
        {
            int idx = uploadName.LastIndexOf(".");
            string suffix = uploadName.Substring(idx);//获得上传的图片的后缀名
            pictureName = DateTime.Now.Ticks.ToString() + suffix;
        }
        try
        {
            if (uploadName != "")
            {
                string path = Server.MapPath("css/images/");
                InputFile.PostedFile.SaveAs(path + pictureName);
                this.Lb_Info.Text = "上传成功";
            }
        }
        catch (Exception ex)
        {
            Response.Write(ex);
        }
    }

　　2，多文件上传，前台页面如下：

 <head runat="server">
    <title></title>
    <script type="text/javascript">
        function Check_FileType() {
            var str = document.getElementById("FileUpload1").value;
            var pos = str.lastIndexOf(".");
            var lastname = str.substring(pos, str.length);
            if (lastname.toLowerCase() != ".jpg" && lastname.toLowerCase() != ".gif") {
                alert("您上传的文件类型为" + lastname + "，图片必须为.jpg,.gif类型");
                return false;
            }
            else {
                return true;
            }
        }

    </script>
</head>
<body>
    <form id="form1" runat="server">
     <div>
    <table style="width: 343px">
            <tr>
                <td style="width: 100px">
                    多文件上传</td>
                <td style="width: 100px">
                </td>
            </tr>
            <tr>
                <td style="width: 100px">
                    <asp:FileUpload ID="FileUpload1" runat="server" Width="475px" />
                    </td>
                <td style="width: 100px">
                    </td>
            </tr>
            <tr>
                <td style="width: 100px">
                    <asp:FileUpload ID="FileUpload2" runat="server" Width="475px" /></td>
                <td style="width: 100px">
                </td>
            </tr>
            <tr>
                <td style="width: 100px">
                    <asp:FileUpload ID="FileUpload3" runat="server" Width="475px" /></td>
                <td style="width: 100px">
                </td>
            </tr>
            <tr>
                <td style="width: 100px">
                    <asp:Button ID="bt_upload" runat="server" OnClick="bt_upload_Click" Text="一起上传" />
                    <asp:Label ID="lb_info" runat="server" ForeColor="Red" Width="448px"></asp:Label></td>
                <td style="width: 100px">
                </td>
            </tr>
        </table>
    </div>

    </form>
</body>
</html>

　　后如代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default11 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void bt_upload_Click(object sender, EventArgs e)
    {
        if (FileUpload1.PostedFile.FileName == "" && FileUpload2.PostedFile.FileName == "" && FileUpload3.PostedFile.FileName == "")
        {
            this.lb_info.Text = "请选择文件！";
        }
        else
        {
            HttpFileCollection myfiles = Request.Files;
            for (int i = 0; i < myfiles.Count; i++)
            {
                HttpPostedFile mypost = myfiles[i];
                try
                {
                    if (mypost.ContentLength > 0)
                    {
                        string filepath = mypost.FileName;//C:\Documents and Settings\Administrator\My Documents\My Pictures\20022775_m.jpg
                        string filename = filepath.Substring(filepath.LastIndexOf("\\") + 1);//20022775_m.jpg
                        string serverpath = Server.MapPath("css/images/") + filename;//C:\Inetpub\wwwroot\WebSite2\images\20022775_m.jpg
                        mypost.SaveAs(serverpath);
                        this.lb_info.Text = "上传成功！";
                    }
                }
                catch (Exception ex)
                {
                    this.lb_info.Text = "上传发生错误！原因：" + ex.Message.ToString();
                }
            }
        }

    }
}

posted @ 2013-01-14 14:31 apecoder 阅读(177) 评论(0) 收藏举报

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ASP.NET 上传图片

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