簡單的單檔案上傳

最後更新：2018-12-03 來源：互聯網

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<%@ 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 id="Head1" runat="server">
    <title>無標題頁</title>
    <script>
    function checkType(){

//得到上傳檔案的值
var fileName=document.getElementById("FileUpLoad1").value;

//返回String對象中子字串最後出現的位置.
var seat=fileName.lastIndexOf(".");

//返回位於String對象中指定位置的子字串並轉換為小寫.
var extension=fileName.substring(seat).toLowerCase();

//判斷允許上傳的檔案格式
//if(extension!=".jpg"&&extension!=".jpeg"&&extension!=".gif"&&extension!=".png"&&extension!=".bmp"){

//alert("不支援"+extension+"檔案的上傳!");
//return false;
//}else{
//return true;
//}

var allowed=[".jpg",".gif",".png",".bmp",".jpeg",".xls"];
for(var i=0;i<allowed.length;i++){
      if(!(allowed[i]!=extension)){
          return true;
      }
}
alert("不支援"+extension+"格式");
return false;
}
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:FileUpload ID="FileUpLoad1" runat="server" />
        <br />
        <asp:Button ID="btnFileUpload" runat="server"
        OnClick="btnFileUpload_Click" Text="檔案上傳"
        OnClientClick="return checkType()" />
        <asp:Label ID="lblMessage" runat="server"></asp:Label>
    </div>
    </form>
</body>
</html>
--------------------------------------

protected void btnFileUpload_Click(object sender, EventArgs e)
{

        if (FileUpLoad1.HasFile)
        {
            //判斷檔案是否小於10Mb
            if (FileUpLoad1.PostedFile.ContentLength < 10485760)
            {
                try
                {
                    //上傳檔案並指定上傳目錄的路徑
                   // FileUpLoad1.PostedFile.SaveAs(Server.MapPath("~/Files/")
                     //   + FileUpLoad1.FileName);
                    /*注意->這裡為什麼不是:FileUpLoad1.PostedFile.FileName
                    * 而是:FileUpLoad1.FileName?
                    * 前者是獲得用戶端完整限定(用戶端完整路徑)名稱
                    * 後者FileUpLoad1.FileName只獲得檔案名稱.
                    */

//當然上傳語句也可以這樣寫(貌似廢話):
FileUpLoad1.SaveAs(@"D:/"+FileUpLoad1.FileName);

                    lblMessage.Text = "上傳成功!";
                }
                catch (Exception ex)
                {
                    lblMessage.Text = "出現異常,無法上傳!";
                    //lblMessage.Text += ex.Message;
                }

            }
            else
            {
                lblMessage.Text = "上傳檔案不能大於10MB!";
            }
        }
        else
        {
            lblMessage.Text = "尚未選擇檔案!";
        }
    }
}

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

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簡單的單檔案上傳

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