Question

asp.net FileUpload 上传文件

asp.net FileUpload 上传文件，限定上传格式， .txt ,.doc,pdf..等格式。。。
怎么实现。。。
帮忙解决啊，谢谢各位了！！！

Answer 1

添加一个判断
protected void PicPath()
{
string fileName = FileUpload1.PostedFile.FileName;
string fname = fileName;
string extraName = fileName.Substring(fileName.LastIndexOf(".") + 1);

if (extraName.ToLower() == "txt" || extraName.ToLower() == "doc" || extraName.ToLower() == "pdf")
{
string sPath = Server.MapPath("路径");

imgSaveName += "." + extraName;

FileUpload1.PostedFile.SaveAs(sPath + "\\" + imgSaveName);

}
else
{
Response.Write("<script>alert('只支持.txt和.doc和.pdf');</script>");
Response.Write("<script>history.go(-2);</script>");

}
}