United States (English)

Home Library Learn Samples Downloads Support Community Forums

MSDN Library

Development Tools and Languages

Visual Studio 2010

Visual Studio

Creating Windows-Based Applications

Windows Forms

Windows Forms Reference

Windows Forms Designer User Interface Elements

Windows Forms Designer

Windows Forms Designer Error Messages

'<identifier name>' is not a valid identifier

'<name>' already exists in '<project name>'

'<Toolbox tab name>' is not a toolbox category

A requested language parser is not installed

A service required for generating and parsing source code is missing

An exception occurred while trying to create an instance of '<object name>'

Another editor has '<document name>' open in an incompatible mode

Another editor has made changes to '<document name>'

Another editor has the file open in an incompatible mode

Array rank '<rank in array>' is too high

Assembly '<assembly name>' could not be opened

Bad element type. This serializer expects an element of type '<type name>'.

Cannot access the Visual Studio Toolbox at this time

Cannot bind an event handler to the '<event name>' event because it is read-only

Cannot create a method name for the requested component because it is not a member of the design container

Cannot name the object '<name>' because it is already named '<name>'

Cannot remove or destroy inherited component '<component name>'

Category '<Toolbox tab name>' does not have a tool for class '<class name>'

Class '<class name>' has no matching constructor

Code generation for property '<property name>' failed

Component '<component name>' did not call Container.Add() in its constructor

Component name cannot be empty

Could not access the variable '<variable name>' because it has not been initialized yet

Could not find type '<type name>'

Could not load type '<type name>'

Could not locate the project item templates for inherited components

Delegate class '<class name>' has no invoke method. Is this class a delegate?

Duplicate declaration of member '<member name>'

Error reading resources from the resource file for the culture '<culture name>'

Error reading resources from the resource file for the default culture '<culture name>'

Failed to parse method '<method name>'

Invalid component name: '<component name>'

The type '<class name>' is made of several partial classes in the same file

The assembly '<assembly name>' could not be found

The assembly name '<assembly name>' is invalid

The base class '<class name>' cannot be designed

The base class '<class name>' could not be loaded

The class '<class name>' cannot be designed in this version of Visual Studio

The class name is not a valid identifier for this language

The component cannot be added because it contains a circular reference to '<reference name>'

The designer cannot be modified at this time

The designer could not be shown for this file because none of the classes within it can be designed

The designer for base class '<class name>' is not installed

The designer inspected the following classes in the file:

The designer must create an instance of type '<type name>', but it can't because the type is declared as abstract

The file could not be loaded in the designer

The following exception has occurred:

The language for this file does not support the necessary code parsing and generation services

The language parser class '<class name>' is not implemented properly

The name '<name>' is already used by another object

The object '<object name>' does not implement the IComponent interface

The object '<object name>' returned null for the property '<property name>' but this is not allowed

The serialization data object is not of the proper type

The service '<service name>' is required, but could not be located

The service instance must derive from or implement '<interface name>'

The text in the code window could not be modified

The Toolbox enumerator object only supports retrieving one item at a time

The Toolbox item for '<component name>' could not be retrieved from the Toolbox

The Toolbox item for '<Toolbox item name>' could not be retrieved from the Toolbox

The type '<type name>' could not be found

The type '<type name>' has no event named '<event name>'

The type '<type name>' has no field named '<field name>'

The type '<type name>' has no property named '<property name>'

The type resolution service may only be called from the main application thread

The variable '<variable name>' is either undeclared or was never assigned

There is already a command handler for the menu command '<menu command name>'

There is already a component named '<component name>'

There is already a Toolbox item creator registered for the format '<format name>'

This language engine does not support a CodeModel with which to load a designer

Type '<type name>' does not have a constructor with parameters of types '<parameter type names>'

Unable to add reference '<reference name>' to the current application

Unable to check out the current file

Unable to find page named '<Options dialog box tab name>'

Unable to find property '<property name>' on page '<Options dialog box tab name>'

Unable to load assembly '<assembly name>'

Visual Studio cannot open a designer for the file because the class within it does not inherit from a class that can be visually designed

Visual Studio cannot save or load instances of the type '<type name>'

Visual Studio is unable to open '<document name>' in Design view

Visual Studio was unable to find a designer for classes of type '<type name>'

Minimize

This topic has not yet been rated - Rate this topic

Component name cannot be empty

Visual Studio 2010

This error arises when you try to rename a component to an empty value.

Concepts

Declared Element Names (Visual Basic)

Visual Basic Naming Conventions

Other Resources

Guidelines for Names

Did you find this helpful? Yes No

Not accurate

Not enough depth

Need more code examples

(1500 characters remaining)

Community Additions

© 2013 Microsoft. All rights reserved.