C How to read out the data stored in the arraylist 10

Retrieve the data in the arraylist through the indexer. Note that the type of data obtained through the indexer.

is an object, and the corresponding type needs to be obtained by casting.

For example. Create an arraylist

arraylist al = new arraylist();

Add data. Integer.

Single-precision floating-point.

hello");String.

Use an indexer to read data from an arraylist and then cast it.

int x = (int)al[0];

int f = (float)al[1];

string s = (string)al[3];

foreach traversal can.

It can also be used as an array, which can be taken by subscript, such as al[0].

Take it out and convert it to the type.

httpservletrequest request = ;

key", object);

Save to the request page"key") to get an object, such as list, you can also use the strues2 tag el expression to get it.

Use the data control datagridview.

Do your own search for the usage of sqldataapter.

Press the value in the arraylist to 1, 2, 3....This side-like square burial is deposited.

Take out the Reset Liquid Oak and assign it to the ArrayList with the split cycle

Save to a string, and then convert the string to an arraylist; The examples are as follows.

string str="a,b,c,d,f,e";

string s = ',');

arraylist lst = new arraylist(s);

There are corresponding methods in the database language, which have implemented the database lookup, and you can just call it.

The text file produced after the run.

c No. Haha"Dots – jf"That NB ah, uh-huh. lz cross-platform call it. Hahahaha.

You can store each object iterated by the arraylist in the library.

If the arraylist is filled with a number, a date, or a character, you can directly put it in the corresponding field for negotiation.

If you put other objects in the arraylist, your database table has to be divided into fields according to the attributes of the objects, and then stored them separately.