How to display the Common 'File- Open' Dialog to Choose a File. A common requirement when building an image database is to give the user some way to select an image file. The 'Common File- Open' dialog provides a flexible and consistent way to do this, using the standard dialog which most Windows users are already familiar with. The dialog can also be used in 'Save' mode to choose the target for saving a file. The 'Common Dialog OCX' controls provide a simple way to do this, however these controls can give rise to versioning and distribution problems (especially in runtime applications), and are generally not recommended. Instead, you can call the Win. API directly to use the common dialogs. Although the API code is somewhat complex, fortunately Ken Getz has generously written a module that you can reuse in your applications, reducing the effort to a cut- and- paste, then writing just a few lines to show the dialog. Usage. To use a 'File- Open' or a 'File- Save' dialog, download or open the following file containing Ken's code, then copy and paste the entire contents into a new module. Download Code'File- Open' Mode. The following code shows how to display a File- Open dialog in respose to a button- click. See the screenshot below for the results. Private Sub btn. Open_Click() Dim str. Filter As String. Dim str. Input. File. Name As String str. Filter = aht. Add. Filter. Item(str. Filter, "JPEG Files (*. Filter = aht. Add. Filter. Item(str. Filter, "bmp Files (*. Filter = aht. Add. Filter. Item(str. Dev : Firefox Chrome URLs. chrome://global/content/nsHelperAppDlg.xul RU Open linked file dialog? chrome://global/content/nsProgressDialog.xul RU. Dialog box style Description; Explorer-style dialog boxes: The directory and file name strings are NULL separated, with an extra NULL character after the last file name.Filter, "all Files (*.*)", "*.*") str. Input. File. Name = aht. Common. File. Open. Save( _Filter: =str. Filter, _Open. File: =True, _Dialog. Title: ="Choose an image file..", _Flags: =aht. OFN_HIDEREADONLY) If Len(str. Input. File. Name) > 0 Then' Do something with the selected file. A common type of dialog is one where the user can select a file to open or save. File pickers. A file picker is a dialog that allows the user to select a file. This element should be used in place of the window element for dialog boxes. The buttons attribute may be used to set which buttons should appear in the dialog box. Window.open will open a XUL window if given a XUL URL to load. and another XUL file describing the dialog to open named madedialog.xul in the same directory. Opening XUL files. Did your computer fail to open a XUL file? We explain what XUL files are and recommend software that we know can open or convert your XUL files. Else'No file chosen, or user canceled. End If. End Sub. In the code above, the three lines containing 'aht. Add. Filter. Item' build a filter string, which determines the options displayed in the 'Files of type' box and the file- filters that are applied when each option is selected. You can modify the string 'Choose an image file..' to control what is displayed in the dialog caption. The dialog can be further customized using flags. See the module code for the available flags, and the API Documentation for detailed flag descriptions. Combine multiple flags using 'Or'. The 'File- Open' Dialog'File- Save' Mode. Using 'File- Save' mode is almost identical to 'File- Open' - just set the 'Open. File' option to 'false'. The following code shows how to display a File- Save dialog in respose to a button- click. Private Sub btn. Save_Click() Dim str. Filter As String. Dim str. Input. File. Name As String str. Filter = aht. Add. Filter. Item(str. Filter, "JPEG Files (*. Input. File. Name = aht. Common. File. Open. Save( _Filter: =str. Filter, _Open. File: =False, _Dialog. Title: ="Save Image As..", _Flags: =aht. OFN_HIDEREADONLY) If Len(str. Input. File. Name) > 0 Then' Do something with the selected file. Else'No file chosen, or user canceled. End If. End Sub. In the code above, the line containing 'aht. Add. Filter. Item' builds a filter string, which determines the options displayed in the 'Save as type' box and the file- filters that are applied when each option is selected. The chosen extension is automatically added to the returned path if no extension is provided. You can modify the string 'Save Image As..' to control what is displayed in the dialog caption. The dialog can be further customized using flags. See the module code for the available flags, and the API Documentation for detailed flag descriptions. Combine multiple flags using 'Or'. The Common 'File- Save' Dialog. Related Articles. How to display the Common 'Browse for Folder' Dialog to Choose a Folder. Imaging for Access that's Easy, Efficient & Fast. NO App Dependencies. NO Complex Coding.
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