时间:2021-07-01 10:21:17 帮助过:6人阅读
顾名思义,通过JS和Ajax来获取上传文件的大小,在上传之前可以有个判断,对上传的文件有所控制,因为js控制文件大小(JS获取文件大小)有些问题,具体大家试下就知道了,在此整理了一下ajax的获取文件大小的方法,比较好用,再调试过程中,出现了c:/fakepath/ 的错误,也将解决方案罗列在下面,以供大家参考
废话少说,代码如下
JS如下:
后台C#代码:
public partial class XMLHttpPost : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
try
{
XmlDocument xmlDocumenet = new XmlDocument();
xmlDocumenet.Load(Request.InputStream);
string type = xmlDocumenet.SelectSingleNode("descendant::Type").InnerText;
string returnMessage = string.Empty;
switch (type.Trim())
{
case "TicketLoanResult":
returnMessage = GetTicketLoanResult(xmlDocumenet);
break;
default:
break;
}
Response.ContentType = "text/xml";
Response.Write(returnMessage);
}
catch (Exception exceptional)
{
//如果有錯誤則返回錯誤信息(Xml格式)
string errorMessage = "" + exceptional.Message + " ";
Response.ContentType = "text/xml";
Response.Write(errorMessage);
}
finally
{
Response.End();
}
}
private string GetTicketLoanResult(XmlDocument input)
{
XmlNode item = input.SelectSingleNode("descendant::TicketType");
string ticketType = item.InnerText.Trim();
FileStream stream = new FileStream(ticketType,FileMode.Open);
return stream.Length.ToString();
}
}
js ajax获取文件大小,需要的码农可以参考下。