How To Use the Open. File. Dialog Box in VB. NET « API Programming. Using the Open. File. Dialog box wasn’t as intuitive as I initially expected, I was thinking I could just drag it out onto my form as a button and place it right where I wanted to. But when I clicked on it from toolbox it just went into the bottom frame of my application, but not on my form like I was hoping for. Below I is an example of a dynamically (aka created at run) created Open. File. Dialog. Because it’s dynamically created when don’t have to drag it out to form, it’s created by the code, not from the GUI. In this example, I put the Open. File. Dialog in a function and not a subroutine. The reason for this is that I want to return a value. Functions allow you to return a value whereas a subroutine does not. Let’s take a look at this screen shot, there are 3 main elements that we can set which I’ll describe in further detail. They are the initial directory, filter, and filter index. Open. File. Dialog. Initial Directory – I guess the easiest one to explain in the initial directory, when you open the dialog box you’ll typically want it to open to a particular folder, in most cases I would guess this to be the user’s My Documents folder. Dialog. Box. Initial. Directory= Environment. Get. Folder. Path(Environment. Special. Folder. Personal)The above line does just that, we query the . NET class Environment to get the locations of the users My Documents folder. Some of us just aren’t great at remembering faces, which can result in an awkward moment when we think we’re meeting someone for the first time and they say we. Note: 2008 and older issues are only available as.chm files. On most versions of windows you must first save these files to your local machine, and then unblock the. Clipdiary clipboard manager saves the complete clipboard history. With this windows clipboard manager you can reuse everything you were once copying - text, pictures. But now what if we wanted it to open up in the C: \Program Files folder? Simple enough…file. Dialog. Box. Initial. Directory="C: \Program Files"Filter – This allows us to filter the filetypes/filenames that we want to see in the Open. File. Dialog. For example, if I want to only see *. I can create a text filter by assigning file. Dialog. Box. Filter = Text Files (*. Here’s a few more examples. Dialog. Box. Filter="Text Files (*. Word Documents (*. All text files beginning with the letter A (a*. All files beginning with accesslog* (accesslog*)|accesslog*|" _. All Files(*.*)|"Filter Index – To default to a particular filter you will need to select a filter index. In this example you’ll notice that I have boot. We can do that by looking at the above piece of code and noticing that boot. Dialog. Box. Filter. Index=3. That’s it, this allows us to keep our filters arranged alphabetically and still be able to select an item from the middle of the list. The Code – Here it is. In the function Open. File() it will return a string with the filename and path as a string. If no filename is selected, a blank string is returned. In the subroutine btn. Statistical Techniques | Statistical Mechanics.Open. File_Click if we do have a file then I’ll just retrieve some of the file info and display it on a message box otherwise I’ll tell the user that they did not select a file. This code was developed by Gerardo Lopez and was downloaded from www. Complete source code is available at: 'http: //www. This was declared as a function because I want to be able to return a filename'the filename will be returned as a string. Public. Function Open. File()As. String'declare a string, this is will contain the filename that we return. Dim str. File. Name =""'declare a new open file dialog. Dim file. Dialog. Box As. New Open. File. Dialog(). 'add file filters, this step is optional, but if you notice the screenshot'above it does not look clean if you leave it off, I explained in further'detail on my site how to add/modify these values. Dialog. Box. Filter="Rich Text Format (*. Text Files (*. txt)|*. Word Documents (*. Image Files (*. bmp; *. All Files(*.*)|"'this sets the default filter that we created in the line above, if you don't 'set a Filter. Index it will automatically default to 1. Dialog. Box. Filter. Index=3'this line tells the file dialog box what folder it should start off in first'I selected the users my document folder. Dialog. Box. Initial. Directory= Environment. Get. Folder. Path(Environment. Special. Folder. Personal). Check to see if the user clicked the open button. If(file. Dialog. Box. Show. Dialog()= Dialog. Result. OK)Then. str. File. Name = file. Dialog. Box. File. Name'Else' Msg. Box("You did not select a file!")End. If. 'return the name of the file. Return str. File. Name. Private. Sub btn. Open. File_Click(By. Val sender As System. Object, By. Val e As System. Event. Args)Handles btn. Open. File. Click'declare a string to the filename. Dim str. File. Name. And. Path As. String= Open. File(). 'check to see if they selected a file or just clicked cancel. If(str. File. Name. And. Path ="")Then'Chastise the user for not selecting a file : )Msg. Box("You did not select a file!")Else'Begin doing whatever it is you would normally do with the file! Msg. Box("You selected this file: "& str. File. Name. And. Path & vb. Cr. Lf & _. "The filename is: "& System. IO. Path. Get. File. Name(str. File. Name. And. Path)& vb. Cr. Lf & _. "Located in: "& System. IO. Path. Get. Directory. Name(str. File. Name. And. Path)& vb. Cr. Lf & _. "It has the following extension: "& System. IO. Path. Get. Extension(str. File. Name. And. Path)& vb. Cr. Lf & _. "The file was created on "& System. IO. File. Get. Creation. Time(str. File. Name. And. Path)& vb. Cr. Lf & _. "The file was last written to on "& System. IO. File. Get. Last. Write. Time(str. File. Name. And. Path) _. End. If. End. Sub. C# Helper: Index. Date. Title. 9/2. Throw a standard exception in C#9/2. Make a dice- rolling simulation in C#9/2. Tile a Picture. Box in C#9/1. Use a symbiote to graphically select hours in C#9/1. Graphically select hours in C#9/1. Remove unnecessary using directives in C#9/1. Draw the Weierstrass function in C#9/1. Determine whether a file or directory exists in C#9/8/2. Calculate Fibonacci numbers in several ways in C#9/7/2. Recursively draw equations in C#9/7/2. The C# Helper Top 1. Amazon. 9/5/2. 01. Efficiently see if a string is blank in C#9/4/2. Table of Contents: The C# Helper Top 1. New Book: The C# Helper Top 1. Change image resolution in C#8/3. Examine the unique words in a Microsoft Word file in C#8/2. Find random prime numbers in C#8/2. Probabilistically determine whether a number is prime in C#8/2. 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