Clear a collection with VBA. I use VBA collections with Word extensively. I initiate such a collection (here named “X”) with this command. Dim X As New Collection. I can then manipulate data in the collection with the commands Add, Item, or Remove. In the following, Key is a unique string, and Data or New. Data are strings of information I want to store or retrieve from the collection X under the Key. To add something I use. X. Add Key: =Key, Item: =Data. ![]() To read the data stored into str. Data. Stored I can use. Data. Stored = X. Item(Key). . To change the data stored I first remove the key with the old data, and then I add new data under the same Key. X. Remove (Key)X. Add Key: =Key, Item: =New. Data. . Is there any way that when I no longer need a collection I could use VBA to clear all the data from a collection? Visual Studio has the command “. Clear” that could do the trick, but “Clear” will not work with VBA. A possible solution that I would dread to use would be to store in a different array all the Keys used with the collection, and then go through each item in that array to Remove it from the collection. I think I would prefer each time to start a new collection under a different name and hope I do not run out of memory with all the collections, most of which would no longer be needed. The RVBA Coding Conventions tell you how to write your code in Visual Basic to be more readable and maintainable. Any suggestions are most welcome. Each time I post a query with EE, I learn a bit more. John Robin (Allen) in Priddis, Alberta, Canada. VBA VLookup - A Complete Guide“Constant effort and frequent mistakes are the stepping stones to genius” – Elbert Hubbard. A Quick Guide to the VBA VLookup. Parameters. Type. Lookup value. The value you are searching for. Table array. The range you are searching through. Column index. The column number of the value to return. Range look up. Optional - set to False for exact match only. Introduction. The VLookup function can be a useful Excel function. Even though it is straightforward to use can often be confusing when used in VBA. In this post, I am going to show how anyone can easily use the VLookup function. I’ll also cover the pitfalls and how to avoid them. Of course, not post would be complete without a ton of examples that you can try for yourself. If you are not familiar with VLookup in Excel then this page provides a great introduction. Notes: I use the Underscore character(_) in the code examples. In VBA this allows you to split a line over multiple lines e. One line. s. Result = Application. VLookup("Apricot", Sheet. Range("A1. 0: B1. Split up with underscore. Result = Application.VLookup( _. "Apricot", Sheet. . Range("A1. 0: B1.A Simple VBA VLookup example. Note: The variable sh. Data in the examples refers to the worksheet by the code name. You can replace this with the code name of the worksheet you are using. Take a look at the following data The code below will return the price for the Orange 1. Sub Simple. VLookup(). Dim s. Res As. String. Res = Application. VLookup("Pear",sh. Data. Range("A2: B7"),2). This will print 1. Immediate Window(Ctrl + G)Debug. Print s. Res. End. Sub The code looks for the text Pear in the range A2: B7. When it finds the text it returns a value from the same row as the text. The value in determined by the column number argument. We used 2 in this example. Let’s look at some more examples and results' Returns 1. Res = Application. VLookup("Orange",sh. Data. Range("A2: B7"),2). Res = Application. VLookup("Apple",sh. Data. Range("A2: B7"),2). Res = Application. VLookup("Plum",sh. Data. Range("A2: B7"),2). Returns Orange as column is 1. Res = Application. VLookup("Orange",sh. Data. Range("A2: B7"),1). Returns Apple as column is 1. Res = Application. VLookup("Apple",sh. Data. Range("A2: B7"),1). Returns Plum as column is 1. Res = Application. VLookup("Plum",sh. Data. Range("A2: B7"),1). The Parameters. In this section we will look at the four parameters. These arelookup_value – The value to look up. It must be in the first column of the range. This is the range to search. This can also be a VBA array although it very slow using this. This contains the column number of the return value. Starts at column number one. Use True(default) to find closest match. Use False to find exact match. Using True assumes that the first columnis sorted alphabetically or numerically. We will look at these parameters individually starting with the lookup_value parameter. Parameter 1: lookup_value. This is the value that you are looking up. It must be in the first column of the Range. If you are using the range C4: X1. C. If you are using the range Z1: AB5 then the lookup value must be in column Z. The type of value you search for will normally be a string as this example shows. Sub String. VLookup(). Dim s. Fruit As. String. Fruit = "Plum"Dim s. Res As. Variant. s. Res = Application. VLookup( _. s. Fruit, sh. Data. Range("A2: B7"), 2, False). End. Sub We can also search for a number but you have to be careful here: If the number is stored as text then the search value must be a string. more. If the number is stored as a number then the search value must be a number. For example in this data we have the lookup column stored as numbers In this case, the lookup value must be a Long or you will get an error message. Sub Number. VLookup(). Dim num As. Long. Dim s. Res As. Variant. Res = Application. VLookup( _. num, sh. Data. Range("F2: G7"), 2, True). Debug. Print s. Res. End. Sub You can also use the Double data type if you are looking up a decimal value. As in the case of an integer it must be stored as a number if you want to use Double. Using VLookup on a Date Type. Using a Date type is a tricky business. VBA has a Date data type but the worksheet does not. So the date type needs to be converted to a Long as the following examples show. Date = CLng(#1/1. Date = CLng(CDate("1/1. Date = CLng(sh. Data. Range("H1. 0")). You can then use it as normal in the VLookup function when the search column contains dates. Sub Date. VLookup(). Dim the. Date As. Long. the. Date = CLng(#1/1. Dim s. Res As. Variant. Res = Application. VLookup( _. the. Date, sh. Data. Range("I2: J7"), 2, False). Debug. Print s. Res. End. Sub. Parameter 2: table_array. This parameter refers to the range of the data we are looking up. You will normally use a range for this as we have seen in the examples so far. If you are using a worksheet table you can use the range of the table. Sub Simple. VLookup. Table(). Dim s. Res As. Variant' Get the table. Dim table As List. Object. Set table = sh. Data. List. Objects("Table. Use the table for the table_array parameter. Res = Application. VLookup( _. "Plum", table. Range, 2, False). Debug. Print s. Res. End. Sub You can also use a VBA array with VLookup but this tends to be very slow. Parameter 3: col_index- num. This parameter refers to the column which contains the value you want to return. Column 1 is the leftmost column of the table_array. If the column number is greater than the number of columns in the range you will get an error. See The VLookup Error Types section below.© Big. Stock. Photo. com. Parameter 4: range_lookup. This is an optional parameter. If it is not used then it takes True as the default value. False means that an exact match must be found. True means that an approximate match will be returned. The first column must be ordered numerically or alphabetically for this to work correctly. Let’s look at the sample data again The following code shows some examples of how this parameter works. Sub Simple. VLookup(). Dim rg As Range. Set rg = sh. Data. Range("A2: B7"). Dim s. Res As. Variant' Stops at Orange - the last item before a P item. Res = Application. VLookup("P", rg, 2, True). Stops at Orange - the last item before a Pea item.Res = Application.VLookup("Pea", rg, 2, True). Download Film Death Race 2 Sub Indo here. Stops at Peach - the last item before a Pead item.Res = Application. VLookup("Pead", rg, 2, True). Error - no exact match found. Res = Application. VLookup("Pea", rg, 2, False). End. Sub. Dealing with Errors© Big. Stock. Photo. com We can use VLookup in two ways in VBA. With Application or with Worksheet. Function. Application. Worksheet. Function. VLookup. Application. VLookup. The difference between them is how we handle errors. Let’s look at each of these in turn. Using Worksheet. Function. Using Worksheet. Function. VLookup requires us to use On Error to trap the error. We can then check the error number Err. Number to see if the value is valid. Sub Use. Worksheet. Function(). Dim s. Res As. Variant' Turn on error trapping. On Error Resume. Next. Res = Application. Worksheet. Function. VLookup _. ("Plum", sh. Data. Range("A2: B7"), 2, False). Check if value found. If Err. Number = 0 Then. Debug. Print"Found item. The value is " & s. Res. Else. Debug. Print"Could not find value: " & "Plum"End. If. End. Sub. Using Application. Using Application. VLookup we can simply check the return value to see if there was an error. Sub Using. Application(). Dim s. Res As. Variant. Res = Application. VLookup _. ("Plum", sh. Data. Range("A2: B7"), 2, False). Check if value found. If Is. Error(s. Res) = False. Then. Debug. Print"Found item. The value is " & s. Res. Else. Debug. Print"Could not find value: " & "Plum"End. If. End. Sub. VLookup Error Types. The following table shows a list of the Excel cell error numbers and what they mean. These are the error numbers we get when we use Application. VLookup. This is taken from this MSDN Page. Constant. Error number. Cell error valuexl. Err. Div. 02. 00. DIV/0xl. Err. NA2. N/Axl. Err. Name. NAME? xl. Err. Null. NULL! xl. Err. Num. NUM! xl. Err. Ref. REF! xl. Err. Value. VALUE! Errors and Causes. The following table shows some common errors you may encounter with VLookup. If you’re having trouble with a particular VLookup error then it is a good idea to try it in Excel first. Error. Cell. Possible causes. Error 2. 01. 5#VALUE! The column number is less than one. Error 2. 01. 5#VALUE! You used a string instead of a range for the table_array parameter. Error 2. 02. 3#REF! The column number is greater than the number of columns. Error 2. 04. 2#N/AThe value is not found.
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