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System.InvalidCastException Class
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The exception that is thrown for invalid casting or explicit conversion.

  • Namespace: System
  • First seen in: .NET v1.0.3705
  • Last seen in: .NET v1.1.4322
  • Last changed in: .NET v1.0.3705
  • Assembly: mscorlib.dll

  • System.SystemException
  • View this type on MSDN
  • View this type on WinFX 247
    Articles (27)Discussions (593)MembersRotorChanges
    Articles

    Page: 12
    A first look at C++/CLI
    The Code Project
    A brief look at the new C++/CLI syntax and how it improves over the old MC++ syntax
    An Interface-based Approach to .NET
    http://www.csharpnewsletter.com/
    In this article, Brian Boyce explains what interfaces are and how they're used, and provides some methods for working with them. He also demonstrates how interfaces differ from abstract classes.
    An Introduction to Mobile Programming in C#
    C#Today
    With the expansion of the web away from traditional browsers, current technology has brought the internet into mobile devices. Microsoft has constantly improved its support to such devices, and the introduction of the .NET framework has taken this support a step further. With .NET we can program for a mobile device as a normal web page and the Common Language Runtime and .NET framework will take care of rendering the data in the appropriate format, i.e. as HTML for browsers, as WML for mobile phones, etc. In this article Niranjan Kumar introduces us to programming for Mobile devices using C# and ASP.NET pages. This is illustrated with a Stock List application that accesses a SQL Server database and lists available stocks on either a Mobile device or HTML browser.
    Boxing and UnBoxing in C#
    The Code Project
    This article explains the concepts of Boxing and UnBoxing in C#
    BUG: You receive a 'System.InvalidCastException' error message when you upgrade a Microsoft Visual Basic 6.0 application with a call to a custom event in a user control to Microsoft Visual Basic .NET and then you run the application
    Microsoft Support
    (834059) - When you upgrade a Microsoft Visual Basic 6.0 application with a call to a custom event in a user control to Microsoft Visual Basic .NET and then you run the application, you may receive the following error message: An unhandled exception of type...
    BUG: You receive a 'System.InvalidCastException' error message when you upgrade a Microsoft Visual Basic 6.0 application with a call to a custom event in a user control to Microsoft Visual Basic .NET and then you run the application
    http://www.kbalertz.com/
    (834059) - When you upgrade a Microsoft Visual Basic 6.0 application with a call to a custom event in a user control to Microsoft Visual Basic .NET and then you run the application, you may receive the following error message: An unhandled exception of type...
    Building a Custom Data Provider for Use with the .NET Data Access Framework
    MSDN
    The System.Data.dll assembly in the .NET Framework contains namespaces whose base classes can be used to create custom data providers. These namespaces also define a number of data access interfaces and base classes that let developers create data providers that will interoperate with other custom providers. Using the ADO.NET classes Connection, Command, DataReader, and DataAdapter, writing a provider is easier than writing one for OLE DB. This article explains these classes and their implementation, and how they can be used to write a variety of different kinds of data providers.
    C#: A Message Queuing Service Application
    MSDN
    This article outlines a Windows service solution designed to process several message queues, focusing on the application of the Microsoft .NET Framework and C#.
    Code Generation in the .NET Framework Using XML Schema
    MSDN
    Learn the difference between typed datasets and classes generated by the xsd.exe tool. Extend this process by reusing the infrastructure classes supporting it, staying compatible with the XmlSerializer.
    Common .NET Libraries for Developers
    MSDN
    Identifies and defines many of common namespaces that you will use when developing .NET applications, and provides examples of the most common classes and methods in those namespaces.
    Data Binding
    C#Today
    ADO.NET, the database connectivity library included with the .NET Framework, provides powerful ways of working with data from all kinds of data sources. Underpinning most of the ADO.NET functionality is XML.In this exercise, Dot Net Guruhew Reynolds takes a look at working with XML and Data Binding. Specifically, he shows how we can create an application that lets us store a small database of Web sites in an XML file on disk.
    Generics<C#>
    The Code Project
    An article on Generics with C#
    How to change the background color for an MDI parent form in Visual C++ .NET
    http://www.kbalertz.com/
    (816184) - This step-by-step article describes how to programmatically change the background color for a Multiple Document Interface (MDI) parent form by using Microsoft Visual C++ .NET 2003. When you use a Windows form as an MDI parent form, the Application...
    How to change the background color for an MDI parent form in Visual C++ .NET
    Microsoft Support
    (816184) - This step-by-step article describes how to programmatically change the background color for a Multiple Document Interface (MDI) parent form by using Microsoft Visual C++ .NET 2003. When you use a Windows form as an MDI parent form, the Application...
    How to handle events for Excel 2003 by using Visual Basic .NET
    http://www.kbalertz.com/
    (822750) - This step-by-step article describes how to handle Microsoft Office Excel 2003 events from an Automation client that you develop by using Visual Basic .NET.
    How to handle events for Excel 2003 by using Visual Basic .NET
    Microsoft Support
    (822750) - This step-by-step article describes how to handle Microsoft Office Excel 2003 events from an Automation client that you develop by using Visual Basic .NET.
    HOW TO: Handle Events for Excel by Using Visual Basic .NET
    Microsoft Support
    (302814) - This step-by-step article describes how to handle Excel events from an Automation client that is developed with Visual Basic .NET. Overview of Event Handling You can construct an event handler with Visual Basic .NET in the following two ways,...
    HOW TO: Handle Events for Excel by Using Visual Basic .NET
    http://www.kbalertz.com/
    (302814) - This step-by-step article describes how to handle Excel events from an Automation client that is developed with Visual Basic .NET. Overview of Event Handling You can construct an event handler with Visual Basic .NET in the following two ways,...
    HOW TO: Return a Strongly-Typed Array from the ToArray(type) Method Using Visual C# .NET (Q312390)
    http://www.kbalertz.com/
    This article describes how to use Visual C# .NET to return a strongly-typed array from the
    In an FMStocks7 Web application, operations that use the GAM component do not work after you deploy DCOM on the remote computer
    http://www.kbalertz.com/
    (840924) - Explains the behavior of GAM-related operations in the FMStocks7 Web application when DCOM is deployed on a remote computer. Describes how to resolve this behavior by manually starting the FMStocks7.GAM COM+ application on the remote computer.
    PRB: Error Message: System.InvalidCastException: Specified Cast Is Not Valid (Q327287)
    Microsoft Support
    SYMPTOMS You may receive the following error message when you view your ASP.NET page in the browser: Specified cast is not valid. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack
    PRB: Error Message: System.InvalidCastException: Specified Cast Is Not Valid (Q327287)
    http://www.kbalertz.com/
    SYMPTOMS You may receive the following error message when you view your ASP.NET page in the browser: Specified cast is not valid. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack
    PRB: InvalidCastException When You Bind DateTimePicker That Contains a Null Value (Q313513)
    http://www.kbalertz.com/
    When you bind a
    Tips and Tricks to Bolster Your Managed C++ Code in Visual Studio .NET
    MSDN
    Developers using the Managed Extensions for C++ have more options than those using other languages because C++ is a lower-level language. However, this means an increase in code complexity. This article discusses a few of the more complex issues facing developers, such as operator overloading, managed types and unmanaged code, and boxing. Also covered are the is operator, the using statement, and string conversions. The author points out the flexibility of Managed Extensions for C++ and outlines the additional effort that is required for you to take advantage of its increased power and flexibility.
    Translation Guide: Moving Your Programs from Managed Extensions for C++ to C++/CLI
    MSDN
    Leverage C++/CLI, a dynamic programming paradigm extension to the ISO-C++ standard language, with this translation guide that maps V1 language features to V2.
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