Oh, actually, my Class is a form , i use serilized to store input data, like textbox or radiobutton data. When my project version update, maybe i will add some textbox or other controls in form class, so i will not deserilize old file, i don't know how to handle it. Please tell me a method to realize save function.

Yes, but i have no idea to achieve it...Could u help me? For example, Class A { int a=0; int b=0; } When i finished serialise class A and create a local file "Saved". When i update my Class A Class A { int a=0; int b=0; int c=0; } Then deserialise "Saved", it will throw exception ,how can i do it? I hope when i deserialize "Saved",it will ignore c.

how to do it? I don't know how to do....Could u send me an example?

When I finished serialize and Deserialize,and create a local file . But if i need update code, i create a new variable in SerializationInfo ,for example ,I declare a new variable "A" in code. But when i deserialize exist old local file, the exception warning is "can not find A", so Deserialize failed. How can i do if i want to ignore A when deserialize old files?

Hi ,i have a questions ,and i don't know how to handle it. I have a double array named array1=new double[100], and each element is function result, like array1[0]=fun(0),array2[1]=fun(1)... each element is positive or negative, and generally speaking, a[0] to a[n] is positive, and a[n+1] to end is negative, so how can i get n ? i need efficient algorithm, like divide-and-conquer method for example... and case 2: if near the end i get wrong result, for example, a[90] is +,how can i get the first negative index n ?

Thank you very much. My code is in Loop many times, so i want a efficient code. your code can reach my function,but efficient i think it's not good.

Now ,i have one question. I use library to define a matrix B, for example, as follows, how can i convert B.real() to a double[] array? thanks very much.

MatrixXcd B(n,3);
for( int i=0; i

Yes,haha, you are right, but i want my code simplex and efficient, so i hope no more class, only several variable can solve it. Func<> can output one param, but i want more output param. ,i don't know how to do it. how can i use delegate to define multi-output delegate ?

oh, DoThread function i want to transfer to Thread as a var, your sample is call immidiately. ThreadO th_o = new ThreadO(x => c( x, n,out F)); //this is Func<>,but i also want to out F Thread th = new Thread(new ThreadStart(th_o.Cons_Mult)); th.Start(); private double c(double x,double n,out double F) { } class ThreadO { public ThreadO(Func fun1) { ... } }

My sample as follows: Now i use Func<> can output 1 param, but i need 3 param output, how can i do it? Func call = y => fun(y, z); //i need output o1,o2, like y=>fun(y,z,out o1,out o2) ? ThreadStart start = () => fun1(x, call); Thread th = new Thread(start);

hi, If i use Func call= y=>fun3(y,z) , fun3 can be one output param function. But if my function need 2 or more output, how can i do it?

ok,i got it. Thank you

oh, but why some other soft can work so fast? Maybe other language can good work for this?

When i plot in the chart, i found chart speed is slower than other soft. Now i think chartarea refresh is cost most of time, but some times i don't need to refresh background series, just need to use invalidate to call paint function. So is there any method to stop backgound series refresh ,not refresh paint function content?

oh,i need to meet ZoomIn function. When user is doing ZoomIn, he can see his mouse's trace through a various width and heigh rectangle when mouse is down.

actually ,i need plot 20 series with 400 points, but when i plot them in the chartarea, it's also slow when mouse move. But if i put 20*400 points in one series, the mouse move is fast. But my requirement is 20 line-series, so i don't want one series's end point line to the other's begin point.

hi,all: This question has been bothering me for a long time. I have some series in chart1, for exampe,i have 100 series, each series have 1 point(or more). And i need paint a rectangle when mouse move, so i have code as follows, but when i run it, the rectangle can not move it smoothly, it is so slow . And i found if series number is less than 10, it maybe move fast. how can i solve it,i have no idea. public Form1() { InitializeComponent(); Series series1; for (int i = 0; i < 100; i++) { series1 = new Series(); series1.Points.Add(new DataPoint(i, i)); //Just for example series1.IsVisibleInLegend = false; chart1.Series.Add(series1); } } bool _isdown = false; Rectangle r=new Rectangle(); private void chart1_MouseDown(object sender, MouseEventArgs e) { _isdown = true; } private void chart1_MouseMove(object sender, MouseEventArgs e) { if (_isdown) { r.Width = 100; r.X = e.X; r.Y = e.Y; r.Height = 100; panel1.Invalidate(); } } private void chart1_Paint(object sender, PaintEventArgs e) { Graphics g = e.Graphics; Pen p = new Pen(Color.LightBlue); p.Width = 2; p.Color = Color.Red; g.DrawRectangle(p, r); }

OK,I SEE,thank you

good idea,smart!!! and i would to know how to generate array 0 to 100 , not use loop?

Hi, all friends: i want to get a efficient function to sort array, and return a old array index . For example: double[] a=[5,4,1,3,2]; how can i get b is [1,2,3,4,5],and index array c is [2,4,3,1,0]? i want a efficent and quick method...