c How to get files that can t upload more than 40kb

If it fails, the return address is returned.

public static string getip()

If the client uses the **server, use http x forwarded for to find the client's IP address.

string userhostaddress = "http_x_forwarded_for"].tostring().split(',')[0].trim();

Otherwise, read the remote addr to obtain the client IP address.

if (userhostaddress = "remote_addr"];

If the first two fail, the IP address is obtained by using the attributes, but it is not possible to determine whether the IP is a client IP or a **IP at this time

if (userhostaddress = ;

Finally, determine whether the acquisition is successful or not, and check the format of the IP address (it is very important to check its format).

return userhostaddress;

return "";

Check the IP address format.

public static bool isip(string ip)

return , "^((2[0-4]\d|25[0-5]|[01]?\d\d?)\2[0-4]\d|25[0-5]|[01]?\d\d?)$");

Consider a single file upload first, and make a single file upload clear, batch upload is nothing more than an outer loop added to the function of a single file upload.

With server controls, the interaction is not very good.

Using js+ajax, you can achieve a good experience.

。。Use the upload control or use js to get the path to the file backend to handle the upload.

Just use a ** and then dynamically change the width of the ** in the file upload event. lz decisively give points... You a** post it.。。。

Estimate the time, and then make a fake one.

FTP files require an FTP user and password, and are uploaded using the FTP protocol.

WCF can be uploaded using FTP and HTTP protocols, the key is how you implement it, WCF is just a data communication framework.

httpwebclient uses the http protocol and can do many things, including uploading files.

In contrast, the FTP protocol is faster to upload files, but it requires an FTP server and maintains an FTP username and password.

I don't know what requirements the system you want to develop has, the general management system can meet the requirements by uploading files using the HTTP protocol.

It may be that there is no limit to modify the size of the uploaded file in your configuration file, the default is 4m, and the larger point you want to change should be OK.

It is best not to exceed 4M for general uploading, and if you need to upload large items, you can find a super-large file upload component on the Internet.

Find a c uncomponent upload class, with demo and then modify it.

string type = ".") +1);The type of the extracted file random rd = new random(); Generate random number int valationno = 10 + generate random number string changemath = ; Generate a random number string uploadfiletime ="yyyymmddhhmmss") +changemath;Get the system time and add a random number to generate the upload **name string filename = uploadfiletime +"." + type;The name of the uploaded file is generated.