ASP.NET 2 的文件上传

在asp.net 2.0中，上传文件时变的比较方便了，因为有了fileupload控件，使用十分简单，

if (fileupload1.hasfile)
            try
            {
                fileupload1.saveas("d://lucenedata//" + fileupload1.filename);
                label1.text = "file name: " +
                     fileupload1.postedfile.filename + "<br>" +
                     fileupload1.postedfile.contentlength + " kb<br>" +
                     "content type: " +
                     fileupload1.postedfile.contenttype;
            }
            catch (exception ex)
            {
                label1.text = "error: " + ex.message.tostring();
            }
        else
        {
            label1.text = "you have not specified a file.";
        }

还可以在web.config文件中，突破默认上传限制的4mb，比如

<httpruntime
executiontimeout="110"
maxrequestlength="11000"
requestlengthdiskthreshold="80"
usefullyqualifiedredirecturl="false"
minfreethreads="8"
minlocalrequestfreethreads="4"
apprequestqueuelimit="5000"
enablekerneloutputcache="true"
enableversionheader="true"
requirerootedsaveaspath="true"
enable="true"
shutdowntimeout="90"
delaynotificationtimeout="5"
waitchangenotification="0"
maxwaitchangenotification="0"
enableheaderchecking="true"
sendcachecontrolheader="true"
apartmentthreading="false" />

设置maxrequestlenth属性，这里为11000kb，即11mb。

而对于多文件上传，也很简单，比如一个例子

string filepath = "d://lucenedata//";
        httpfilecollection uploadedfiles = request.files;
        for (int i = 0; i < uploadedfiles.count; i++)
        {
            httppostedfile userpostedfile = uploadedfiles[i];
            try
            {
                if (userpostedfile.contentlength > 0)
                {
                    label1.text += "<u>file #" + (i + 1) +
                       "</u><br>";
                    label1.text += "file content type: " +
                       userpostedfile.contenttype + "<br>";
                    label1.text += "file size: " +
                       userpostedfile.contentlength + "kb<br>";
                    label1.text += "file name: " +
                       userpostedfile.filename + "<br>";
                    userpostedfile.saveas(filepath + "//" +
                       system.io.path.getfilename(userpostedfile.filename));
                    label1.text += "location where saved: " +
                       filepath + "//" +
                       system.io.path.getfilename(userpostedfile.filename) +
                       "<p>";
                }
            }
            catch (exception ex)
            {
                label1.text += "error: <br>" + ex.message;
            }
        }
    }