Vb.net file picker

Read file. Next, we read a file the user selects in the OpenFileDialog. We detect the DialogResult. OK value—this occurs when the OK button is pressed. We then use File. ReadAllText to load in the text file. Note When the file is read, and the OK button is pressed, the length of the file is displayed in the title bar of the window.

The OpenFileDialog has many properties. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. Thank you. Microsoft makes no warranties, express or implied, with respect to the information provided here.

The following code example uses the OpenFileDialog implementation of FileDialog and illustrates creating, setting of properties, and showing the dialog box. The example uses the ShowDialog method to display the dialog box and return the DialogResult. The example requires a form with a Button placed on it and the System. IO namespace added to it. It is not intended to be used directly but contains common behavior for those two classes.

You cannot create an instance of FileDialog. Although the class is declared public, you cannot inherit from it, as it contains internal abstract methods. FileDialog is a modal dialog box; therefore, when shown, it blocks the rest of the application until the user has chosen a file. When a dialog box is displayed modally, no input keyboard or mouse click can occur except to objects on the dialog box.

The program must hide or close the dialog box usually in response to some user action before input to the calling program can occur. Instead, dynamically obtain the path using one or more of the techniques described in the following table. If you want to enable users to select a folder instead of a file, use the FolderBrowserDialog.

Depending upon the type of application, how data associated with the application is stored, and the reason for accessing the file system, there are many possible ways in which you can create a directory path. The following table shows the techniques for creating paths dynamically. Notice that a full path may be built up using one or more of the described techniques. For example, the GetFolderPath method might be used to obtain the path to the MyDocuments folder, then an application setting may be used to add a relative subdirectory portion.

The System. Path class contains static members to assist in manipulating absolute and relative path strings, whereas the System. File and System. Directory classes have static members that actually manipulate files and directories, respectively. If the user of your application changes the folder in the FileDialog , then the current working directory for your application is set to the location specified in the FileDialog.

To prevent this, set the RestoreDirectory property to true. Owns the FileOk event. Gets or sets a value indicating whether the dialog box automatically adds an extension to a file name if the user omits the extension.

Gets or sets a value indicating whether this FileDialog instance should automatically upgrade appearance and behavior when running on Windows Vista. Gets or sets a value indicating whether the dialog box displays a warning if the user specifies a file name that does not exist.

Gets or sets a value indicating whether the dialog box displays a warning if the user specifies a path that does not exist.

Gets or sets the GUID to associate with this dialog state. Typically, state such as the last visited folder and the position and size of the dialog is persisted based on the name of the executable file. By specifying a GUID, an application can have different persisted states for different versions of the dialog within the same application for example, an import dialog and an open dialog.

This functionality is not available if an application is not using visual styles or if AutoUpgradeEnabled is set to false. Gets the IContainer that contains the Component. The file name does not include the path. Gets an array of file names and extensions for all the selected files in the dialog box. The file names do not include the path. Gets or sets whether the dialog box supports displaying and saving files that have multiple file name extensions.

Opens the file selected by the user, with read-only permission. The file is specified by the FileName property. In this example, let's load an image file in a picture box, using the open file dialog box. Frahaan Hussain. Arnold Higuit. Previous Page. Next Page. Useful Video Courses. More Detail. NET - Hands On! Previous Page Print Page. Save Close.