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i have a script in mql4 language in metatrader software that run this url:
http:
i want to insert this parameters('s' and 'd')in database.
so i build a webservice and a 'Default.asmx' page in visual studio.
what code i should write for inserting these in database?
Regards
modified on Wednesday, January 12, 2011 1:33 AM
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roebuck-code wrote: what code i should write for inserting these in database?
An insert statement. Beyond that, I can't help as this is far too vague. We don't know what database, what version of the .NET runtime, etc, that you are using. One thing though - ensure it's not open to a SQL Injection attack.
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Pete O'Hanlon wrote: We don't know what database, what version of the .NET runtime, etc, that you are using.
data base is sql2000.Visual Studio 2005
do i write a method(methodname) in "Default.asmx" page that get parameters from url and insert these to database?
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If it's an asmx file, then it should be a web service, so you would write a WebMethod in there. Have a read up on traditional web services in .NET to see what you need to do.
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like this?:
[WebMethod]
public void zakhire(string s,string d)
{
string sql = " insert into FX_Forecast2 (Symbol,A) values( '"+s+"','"+d+"')";
OpenDb();
cmd = new SqlCommand(sql, con);
cmd.ExecuteNonQuery();
con.Close();
}
do with writing this code and loading this url(http://aaaa.com/Default.asmx/zakhire?Symbol=+S+&A=+d;) these value will insert in database?
how can i run this url for test in visual studio?(not in mql4)
modified on Monday, January 17, 2011 2:07 AM
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Is there a missing " at the end of that line?
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viaducting wrote: Is there a missing " at the end of that line?
ops..thnQ..I correct it
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Manfred R. Bihy wrote: Is this a repost of this?
no,i think my programming in that post is wrong..
this question is before that method happen.
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Thats a good way to get hacked by a first grader who read up on SQL injection.
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I found the answer:
with Going to web.config and adding this code in system.web section:
<webServices>
<protocols>
<add name="HttpGet"/>
<add name="HttpPost"/>
</protocols>
</webServices>
good luck.
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Hi all,
I want to derive a class from LinkedListNode<t> so that the nodes themselves contain the data values, but cannot as the class is sealed - any reason why this should be so? If I create a standard LinkedList of classes, the classes themselves do not know about the Next and Previous nodes, because the value of each node is stored in LinkedListNode<T>.Value.
Do I need to write my own doubly-linked list to achieve this or can this limitation be overcome? I suspect I'm probably missing something obvious!
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viaducting wrote: any reason why this should be so?
There are probably plenty of reasons the team who created this marked it as sealed. Ask them.
LinkedListNode is just a pointer to the node within the LinkedList, which, as it is a generic collection, can contain any validate object. You don't need to extend LinkedListNode or create your own LinkedList implementation.
I know the language. I've read a book. - _Madmatt
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Under the existing implementation only a LinkedListNode can be used to walk along the list. The data within it cannot access the Next and Previous links. I want to store data that needs to access the adjacent nodes, so I don't think the standard implementation will work unmodified.
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I see two ways for you:
1.
use LinkedListNode as intended, and provide a backlink from your actual node data to the LinkedListNode it belongs to.
2.
roll your own linked list. It isn't that hard.
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code. modified on Tuesday, January 11, 2011 9:33 AM
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1. Is the way I am heading via an overloaded LinkedList where all the Add... functions will set this up automatically.
2.  I know it isn't hard but I was trying to avoid doing it!
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viaducting wrote: If I create a standard LinkedList of classes, the classes themselves do not know about the Next and Previous nodes
And usually they should not. For example, if I want a LinkedList<invoice>, the Invoice objects I put into the list do not have to know anything about next or previous, this information has nothing to do with Invoice type. Other way, if I created a single Invoce, what would be supposed to be the values of Next and Previous? Should it create a complete linked list for just opening one?
viaducting wrote: Do I need to write my own doubly-linked list to achieve this or can this limitation be overcome?
I don't think it is a limitation. It is a well designed class for a LinkedList. If you need something special, I guess you will have to make a new class, but I'm afraid I cannot give you any further help unless you give us a little more information of what you need to do.
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You might not need to for a list of invoices, but there are other situations where it would be very useful. For example, if you have a list of points representing a polygon it is useful to be able to access the adjacent nodes so that joints can be re-built if one of the points moves.
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Yes, that's why I said "usually". However, I think we are on the same case for points representing a polygon. Point is a well defined class, and Next or Previous have nothing to do with it. This information might make some sense in a Polygon class, but not in the points themselves. Please, tell us something else about what you pretend to do. Maybe some of us can give you a good approach.
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I don't really agree here. In your example, it is a list of points, each point exists by itself. Drawing a poly-line, or moving/merging points, or performing whatever other operation that goes beyond a single point, would be an operation on the overall object, the polyline, which can access all the points. At the point level, there is no need to access other points, and when there is a need, it has to be organized on the higher level.
Of course if performance is your primary concern, things may well be different. And then I wouldn't use a pre-existing class unless it suits my needs perfectly.
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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I would agree with you if everything was static, but if you have a polyline with radius blends, and one point moves, then to rebuild the blend the point that changed only needs to look at the adjacent points, not the whole line. It seems inefficient to have to call another function in the (theoretical) Polyline class to rebuild everything when the point itself knows that its position has just changed.
Maybe I'm trying to over-optimise the efficiency and reducing the simplicity instead.
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Perhaps your points can raise an event that the line is listening for?
somepoint.OnMoved += PointMovedHandler
Besides, aren't Points immutable? Wouldn't a "move" really be a replacement of one Point with another? (Hmmm... it seems they're not... I think they should be. Ah well.)
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In the FrameWork they are one of the very few exceptions.
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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