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.NET Forum / .NET Framework / Setup / February 2004Overwriting file
I have an app that I upgrade a lot. When I install it, it overwrites a .mdb file I use for the app. What can I do to avoid that? Maybe a dialog box asking if the database should be overwritten, or existing should be used. I appreciate any help I can get. Thank you, Steve Farmer Hi Steve, You can indeed employ the CheckBoxDialog prompting the user whether s/he wants to keep the existing database. Then use the property value(s) corresponding to the checkbox(es) on this dialog as the input to the .mdb file Condition property.  SignatureDmitriy Lapshin [C# / .NET MVP] X-Unity Test Studio http://www.x-unity.net/teststudio.aspx Bring the power of unit testing to VS .NET IDE > I have an app that I upgrade a lot. When I install it, it overwrites a .mdb > file I use for the app. What can I do to avoid that? Maybe a dialog box [quoted text clipped - 5 lines] > > Steve Farmer Thank you for your reply. I added a radio button dialog. Could you please tell me where I code the events? This dialog should only come up if the database already exists. Steve > Hi Steve, > [quoted text clipped - 13 lines] > > > > Steve Farmer These events don't need to be coded. You should add a file search in the Launch Conditions, then set the property corresponding to the result of that search (it's name is set in the Properties window for the search) as the Condition property value for the CheckBoxDialog (hmm...not sure this property exists on the dialog level), or at least as the "Enabled" property value for the check box displayed on this dialog. SignatureDmitriy Lapshin [C# / .NET MVP] X-Unity Test Studio http://www.x-unity.net/teststudio.aspx Bring the power of unit testing to VS .NET IDE What exactly do you mean by "upgrade"? If you have a VS setup project using RemovePreviousVersions, you don't have much control over what happens because it removes the old version before installing the new one. A dialog box won't really help in this situation because there's nothing you can do with it that tells the uninstall of the old version not to remove the database. SignaturePhil Wilson [MVP Windows Installer] ---- > I have an app that I upgrade a lot. When I install it, it overwrites a .mdb > file I use for the app. What can I do to avoid that? Maybe a dialog box [quoted text clipped - 5 lines] > > Steve Farmer Thank you for the reply. So what can I do to preserve the previous database during installation? Steve > What exactly do you mean by "upgrade"? If you have a VS setup project using > RemovePreviousVersions, you don't have much control over what happens because it [quoted text clipped - 10 lines] > > > > Steve Farmer Are you using RemovePreviousVersions? SignaturePhil Wilson [MVP Windows Installer] ---- > Thank you for the reply. So what can I do to preserve the previous database > during installation? [quoted text clipped - 21 lines] > > > > > > Steve Farmer Yes, I am, should I set it to false? Steve > Are you using RemovePreviousVersions? > > Thank you for the reply. So what can I do to preserve the previous database [quoted text clipped - 22 lines] > > > > > > > > Steve Farmer No, because then you won't get an upgrade at all. RemovePreviousVersions causes an uninstall of the old product followed by an install of the new one. The problem isn't overwriting, the problem is that you're uninstalling the older version and installing the new version. See if it works when you set the Permanent property on the .mdb file when you install it. That should preserve it on the system, and if it's been updated the incoming .mdb won't overwrite it (Windows Installer overwrite rules don't replace data files if the modify date is different from the creation date). SignaturePhil Wilson [MVP Windows Installer] ---- > Yes, I am, should I set it to false? > [quoted text clipped - 30 lines] > > > > > > > > > > Steve Farmer
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