實現ASP.NET多文件上傳示例（不用第三方插件）

不用第三方插件，實現多文件上傳：

aspx文件關鍵代碼：

<form id="form1" runat="server">
請選擇上傳的文件：<br />
<asp:FileUpload ID="FileUpload1" runat="server" /><br />
<br />
<asp:FileUpload ID="FileUpload2" runat="server" /><br />
<br />
<asp:FileUpload ID="FileUpload3" runat="server" /><br />
<br />
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
<asp:Literal ID="LiteralScript" runat="server" EnableViewState="false"></asp:Literal>
</form>

	<form id="form1" runat="server">
	請選擇上傳的文件：<br />
	<asp:FileUpload ID="FileUpload1" runat="server" /><br />
	<br />
	<asp:FileUpload ID="FileUpload2" runat="server" /><br />
	<br />
	<asp:FileUpload ID="FileUpload3" runat="server" /><br />
	<br />
	<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
	<asp:Literal ID="LiteralScript" runat="server" EnableViewState="false"></asp:Literal>
	</form>

aspx.cs文件關鍵代碼：

protected void Button1_Click(object sender, EventArgs e)
{
    HttpFileCollection files = Request.Files;
    for (int i = 0; i < files.Count; i++)
    {
        if (files[i].ContentLength == 0)
        {
            LiteralScript.Text = "<script>alert('請選擇文件！')</script>";
            return;
        }
    }
    for (int i = 0; i < files.Count; i++)
    {
        if (files[i].ContentLength > 0)
            files[i].SaveAs(Server.MapPath("~/") + Path.GetFileName(files[i].FileName));
    }
}

	protected void Button1_Click(object sender, EventArgs e)
	{
		HttpFileCollection files = Request.Files;
		for (int i = 0; i < files.Count; i++)
		{
			if (files[i].ContentLength == 0)
			{
				LiteralScript.Text = "<script>alert('請選擇文件！')</script>";
				return;
			}
		}
		for (int i = 0; i < files.Count; i++)
		{
			if (files[i].ContentLength > 0)
				files[i].SaveAs(Server.MapPath("~/") + Path.GetFileName(files[i].FileName));
		}
	}

示例用的是多個FileUpload控件，也可以使用HtmlInputFile控件或直接使用靜態file表單元素。

 

 

 

string[] str = new string[4];
//獲取HttpFileCollection對象
HttpFileCollection fileList = System.Web.HttpContext.Current.Request.Files;
for (int i = 0; i < str.length; i++)
{
System.Web.HttpPostedFile postedFile = fileList[i];
string fileName = postedFile.FileName;
if (fileName != string.Empty)
{
string size = postedFile.ContentLength.ToString();   
if (int.Parse(size) >= 332422812) //判斷上傳片的大小
{
return ;
}
else
{
string Imagetype = fileName.Substring(fileName.LastIndexOf("."));    //圖片類型
if (Imagetype == ".jpg" || Imagetype == ".bmp" || Imagetype == ".gif" || Imagetype == ".png" || Imagetype == ".jpeg")
{
string root = Server.MapPath("~/images/uploads/Media/bigImg/");  //圖片保存路徑
string proName = "";
string proNameNew = "";
string filePathOld = "";       //原圖片路徑
string filePathNew = "";      //新圖片路徑

filePathOld = root + strl[i];   
if (File.Exists(filePathOld))
{
proNameNew = DateTime.Now.ToString("yyyyMMddhhmmss") + strl[i];
File.Move(filePathOld, (root + proNameNew));      //將原圖片重新命名
}
proName = "My"+Imagetype;        //新圖片名
filePathNew = root + proName;
postedFile.SaveAs(filePathNew);
strl[i] = proName;       //存儲圖片新名稱
}
}
}