Paste the following class definition into Program. Add the following code to the Main method to create a bankAccounts list that contains two accounts. Method Add has an optional parameter for specifying a particular template. Optional parameters, new in C 4, enable you to omit the argument for that parameter if you want to use the parameter's default value. Because no argument is sent in the following code, Add uses the default template and creates a new workbook.
The equivalent statement in earlier versions of C requires a placeholder argument: ExcelApp. Add Type. Add the following code at the end of DisplayInExcel. The code inserts values into the first two columns of the first row of the worksheet. The foreach loop puts the information from the list of accounts into the first two columns of successive rows of the worksheet. Add the following code at the end of DisplayInExcel to adjust the column widths to fit the content.
Earlier versions of C require explicit casting for these operations because ExcelApp. The following lines show the casting. C 4, and later versions, converts the returned Object to dynamic automatically if the assembly is referenced by the EmbedInteropTypes compiler option or, equivalently, if the Excel Embed Interop Types property is set to true.
True is the default value for this property. To illustrate additional ways in which C 4, and later versions, enhances Office programming, the following code opens a Word application and creates an icon that links to the Excel worksheet. These calls incorporate two other new features introduced in C 4 that simplify calls to COM methods that have reference parameters. First, you can send arguments to the reference parameters as if they were value parameters.
That is, you can send values directly, without creating a variable for each reference parameter. The compiler generates temporary variables to hold the argument values, and discards the variables when you return from the call.
Second, you can omit the ref keyword in the argument list. ToString , attribute. ToString ]; hash. ToString ; foreach var property in msi. ToString , property. Name]; property. GetProducts ;. Paul G Paul G 1, 5 5 silver badges 14 14 bronze badges.
Super helpful thanks so much! I was close but you got me all the way there and then some. I stared at your solution at first and couldn't figure out how it wasn't working.
It was fun puzzle to solve man : — Paul G. VS doesn't recognize 'WindowsInstaller. Installer', what reference am I missing? Sign up or log in Sign up using Google. Second, suppose the installer replaces an existing file. Save the existing file in a temporary directory and the location of the new location of the file in the IDictionary. If the installation is rolled back, the newer file is deleted and replaced by the original from the temporary location.
The Installer. Context property contains information about the installation. For example, information about the location of the log file for the installation, the location of the file to save information required by the Uninstall method, and the command line that was entered when the installation executable was run.
Initializes a new instance of the Installer class. Gets the IContainer that contains the Component. Gets a value that indicates whether the Component is currently in design mode. Gets the list of event handlers that are attached to this Component.
Gets or sets the ISite of the Component. Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. Releases all resources used by the Component. Releases the unmanaged resources used by the Component and optionally releases the managed resources. Retrieves the current lifetime service object that controls the lifetime policy for this instance.
Returns an object that represents a service provided by the Component or by its Container. Gets the Type of the current instance. Creates a shallow copy of the current Object. Creates a shallow copy of the current MarshalByRefObject object. Raises the AfterInstall event. Raises the AfterRollback event. Raises the AfterUninstall event.
Raises the BeforeInstall event. Raises the BeforeRollback event. Raises the BeforeUninstall event. Raises the Committed event. For Example I have created MyApp. So I wonder if it is possible somehow to add or replace a file in the msi package without recreating the package.
Thanks a lot. Cancel Event swissnik Feb First of all, I wanted to say that the code of yours if very usefuel. But I do have an open question, I cann see in your code that you disable and enable a Cancel-Button where the user can cancel and rollback the installation. But what code is executed on the Click Event of the Button?
Can anybody help me with this issue? Ancient post but was there ever a solution to this? Programmatic install of Installer My problem is that I have to install, uninstall msi files on a system programatically. The install may be quiet or with the installer UI. Also it should have the ability to install patches to installed MSIs programatically. Can you help? Re: Programmatic install of Installer Lalit N Dubey.
Hi Friend, to install and uninstall Programmaticly i have a block of code all u have to pass the path of MSI to install and uninstall. There are some things that we must know "msiexec. There are many options to manipulate the process, but we are just going to talk about two of them: 1.
Note: uninstallation can be done by product code as well Here is 3 method whice perform all action like Install,uninstall,Repair using System. ToString ;. ExternalUI, IntPtr. MsiInstallProduct " SomeInstall. WriteLine string. MsiInstallProduct "SomeInstall. But it just dies, and it always does it. I have checked "SomeInstall.
Re: Null Refernce Exception ti 3-Sep Tough, right? Do you have a dump or at least a call stack? Here I can tell you one possiblity. This AV most likely happens when msi. The problem is there is a bug in the posted code. Of course it is not the only one. The delegate lifetime is too short. GC will collect it while msi. How would you appreciate me? Re: Null Refernce Exception m Nov Hi guys, I'm looking at this now and have the same issue with the NullReferenceException.
0コメント