EXCEL VBA TUTORIAL AMAZON CODE

The Rate Node is the 3rd Node of the Result Node.The Bid Node itself is the 6th Node of the Rate Node.In the NodeTypeValue variable of the final Bid Node.Probably wondering why we went through all those previous steps? By going through all those steps we now know that the value we are after can be found: This is stored in the 6th child node:ДЄs you can see the value of the USD to BGN exchange rate is contained within the nodeTypedValue variableВ of thisВ Child Node: Repeat step 7 to find the Node which contains the Bid data. This is stored within the 3rd Child Node: Repeat step 7 to find the Rate Node that has the USD to BGN Exchange rate. It can be seen from the figure below that there is only one node in the Query Node and that is the ResultВ node: That would mean opening the ChildNodes of the current node and looking for the Node which contains the ResultВ Tag. Repeat steps 5 and 6 for the current node. By going through the child nodes you will see that the Query Tag is stored in the second node: So basically what we need to find is the Query node.

So we need to work our way from the top Node (Query) down to the Bid node with the USD to BGN exchange rate.ДЄs mentioned in the previous step in the XML Page the highest level tag is the Query Tag:

The Rate tag is within a Result tag and that is within the Query tag: The Bid tag is containedВ withinВ a Rate tag. This value is contained within a Bid tag. Basically what we are trying to do is to go through all the nodes until we find the node thatВ containsВ the USD to BGN Exchange Rate Bid price. Open the ChildNodesВ of the xmlObjectВ variable:ДЄs you can see the First Child Node of the xmlObjectВ variableВ containsВ several Items. '%29&env=store:///alltableswithkeys'Д¬reate a breakpoint after the last line of code:

EXCEL VBA TUTORIAL AMAZON CODE

Method 1:Д¬opy the following code to the VBA Editor: This method is explained in Method 1.ДЄnother method would be to programmaticallyВ iterateВ through theВ nodes until the required Node is found. One method for getting the bid value is to manually go through the nodes until the required node is found. Each node represents a tag and the value the tag contains. Each node may consist of several child nodes.

LetвЂ™s say we want the bid value of the USD to BGN. So now that we haveВ connectedВ to aВ webpage with an API, how can we get the data we are after? Consider the first example where we were trying to get data from the page USD Forex API.В Below I have brought the XML on that page: We could then use a code similar to the one below to connect to the XML file: The last line loads the webpage with the XML API:ДЄnother method would be using early binding, in this method a reference must be created to one of the Microsoft XMLВ Libraries: By default the async property is set to true, which may lead to errors if the XML file hasnвЂ™t finished loading and we try to access it: If its set to true, the program will continue execution even if the XML file has not been loaded. If the async property is set to false, the program will wait for the XML file to load before executing the next line. Set xmlOBject = CreateObject('MSXML2.DOMDocument.5.0') Once you have the URL of the webpage you can connect to it using the methods below: google the term вЂњTime APIвЂќ and again you will see a list of sites offering an API that provides the current date and time. Or for example lets say you want your program to connect to the internet and get the current time and date. You can find them by googling the term вЂњForex APIвЂќ. There are many sites offering an API to the different currency exchange rates, most of them require a subscription. For example lets say you want to build an application that can get the exchange rate for different currencies.

Microsoft MSDN, A BeginnerвЂ™s Guide to the XML DOM.

For a more in depth explanation about the MSXML object please see the link below: In this article I will briefly explain how the MSXML object can be used to get data from the internet. The MSXML object is actually usedВ to connect to an XML file. A faster method would be using the MSXML object.В The downside of using the MSXML object is that you canвЂ™tВ use it on any site. The problem with using Query Tables, is that they are slow.

Excel VBA, Retrieving Data From a Website Using a Query Table.

Previously in the article below IвЂ™ve explained how you can get data from the web using query tables in VBA:

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