如何使用asp.net c#上传mp3文件

// 前端页面代码
<form id="form1" runat="server">
    <input type="file" id="fileUpload" runat="server" />
    <asp:Button ID="btnUpload" runat="server" Text="上传" OnClick="btnUpload_Click" />
</form>

// 服务器端代码
protected void btnUpload_Click(object sender, EventArgs e)
{
    if (fileUpload.HasFile)
    {
        string fileName = fileUpload.FileName;
        string fileExtension = Path.GetExtension(fileName);

        // 检查文件是否为MP3格式
        if (fileExtension.ToLower() == ".mp3")
        {
            // 保存文件到服务器指定位置
            string filePath = Server.MapPath("~/Uploads/") + fileName;
            fileUpload.SaveAs(filePath);

            // 给出成功提示，并提供下载链接或者播放链接
            Response.Write("文件上传成功！<br />");
            Response.Write("下载链接：<a href='" + ResolveUrl("~/Uploads/") + fileName + "'>" + fileName + "</a><br />");
            Response.Write("播放链接：<audio controls><source src='" + ResolveUrl("~/Uploads/") + fileName + "' type='audio/mpeg'></audio>");
        }
        else
        {
            Response.Write("请上传MP3文件！");
        }
    }
    else
    {
        Response.Write("请选择要上传的文件！");
    }
}