Hi,

I have set the remove previous versions to true and increasing the version each time msi is built. Now, when it is installed the older version is unstalled and newer version is installed.

But before the installation starts, is it possible to check if an older version of msi is already installed and show a message like below
Do you want to install the newer version?

If yes ,it should install the newer version
If no, it should exit the installation

Is this possible??

Thank you.

Set RemovePreviousVersionsto true

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I have set RemovePreviousVersions to true and increased the version number. It is working as expected.

But what I want is

Show a message before the installation starts, asking the user if he wants to install the new version(if there is already an older version installed on his machine. If yes is clicked, it should proceed, If no, it should exit the installation at this point). Right now, it is installing the newer version without showing any information.

I want to let the user know that a new version is being installed. Right now, it is automatic(not showing any information)

Thank you.

Hi yaradoddi,

As far as I know, we can only use the ways below to custom a Setup project:

1. Add a dialog which contains two radio buttons for users to select a condition value. This would have us be able to setup some of the files. This is the detail information:
http://msdn.microsoft.com/en-us/library/ecaca8zb(VS.80).aspx.

2. Add a custom action to show a message box to allow users to check something and decide if continue. This is a walk through:
http://msdn.microsoft.com/en-us/library/d9k65z2d(VS.80).aspx.

This is a sample about the custom Install class which would continue or stop uninstalling according to the user input:

[RunInstaller(true)]

public partial class DataBaseInstall : Installer

{

public override void Uninstall(IDictionary savedState)

{

if (MessageBox.Show("Do you want to uninstall the program.", "warning", MessageBoxButtons.OKCancel) == DialogResult.OK)

base.Uninstall(savedState);

else

return;

}

}

But via this method, we cannot decide whether the uninstall process is started by a uninstall request or a install request. Another issue is that when we stop the uninstalling process, the install process would still start in the next step.

I have two ideas to achieve a similar goal:

1. We can install/uninstall a program in the user interface of the application. For example, we can add a update menu item to the main menu of the application. When user clicks the menu, we can popup a message box to have the user check whether to update.

2. We can use other tools to produce setup package, such as WIX, or ClickOnce.

WIX: http://msdn.microsoft.com/en-us/library/aa302186.aspx.

ClickOnce: http://msdn.microsoft.com/en-us/library/t71a733d(VS.80).aspx.

Let me know it these ideas helps.

Aland Li

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Hi,

We are changing the issue type to “General Discussion�because you have not followed up with the necessary information. If you have more time to look at the issue and provide more information, please feel free to change the issue type back to “Question�by opening the Options list at the top of the post window, and changing the type. If the issue is resolved, we will appreciate it if you can share the solution so that the answer can be found and used by other community members having similar questions.

Aland Li

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