1, the role of COM
As a software model, COM provides the standard of communication between programs, but its greatest contribution lies in the change of programming method. COM combines both object technology and component technology. Object characteristics make application system design and implementation more in line with the face of the real world; Component
Java. lang. NoClassDefFoundError: com/sun/mail/util/LineInputStream java. lang. NoClassDefFoundError: com/sun/activation/registries/LogSupport
NoClassDefFoundError: com/sun/mail/util/LineInputStream
NoClassDefFoundError: com/sun/activation/registries/LogSupport
Cause: the method in mail. jar conflicts with the metho
Failed to retrieve components whose CLSID is {00024500-0000-0000-C000-000000000046} in the COM class factory. com component clsidFailed to retrieve components whose CLSID is {00024500-0000-0000-C000-000000000046} in COM class factory
When exporting data to an Excel file in the project, the following error occurs: 80070005 when the component whose CLSID is {000245
Tags: blog HTTP use for 2014 problem log time applicationCLR cannot convert from com context 0x208f68 to com context 0x2090d8, which has lasted 60 seconds. The thread with the target Context/unit is likely to execute a non-pump wait or process a very long operation without sending a Windows message. This usually affects the performance, and may even cause the application to not respond or the memory used to
32-bit COM components developed by. NET and C ++ are often included in a large application.ProgramGroup. However, after being deployed to a Windows 64-bit system, the error "retrieving CLSID 80040154 of com-class factory components" may occur.
The solution is as follows:
In the. NET project, right-click the project and choose Properties to open the project property configuration page:
After the code
All good programmers will do their best to make the program they write more reusable, because it allows you to quickly write more robust and upgradeable programs.There are two choices to make code reuse:1. White box: The simplest one is to copy your tablet to another file.2. Black box: It consists of connecting the compiled pieces of the program. So the compiled black box class library that the client can invoke is called a component.. NET also provides developers with a way to build and expand
All excellent Program Members will do their best to make their programs more reusable, because it allows you to quickly write more robust and upgradeable programs. There are two ways to makeCodeReuse options: 1. white box: the simplest one is to copy your program to another file.2. Black Box: it includes connecting compiled program slices. Therefore, the compiled black box class library that can be called by the client is called a component. . Net also provides developers with methods simila
Sqlite3 com
Sqlite3 com vs. SQLite com
Sqlite3 improvements:Http://www.newobjects.com/pages/ndl/SQLite3%5Ccomparison23.htm
The table lists the most significant features of sqlite3 COM and SQLite COM. it covers both t
Construct a minimum framework structure for creating COM components, and then take a look at the internal processing process.
Iunknown * punk = NULL;Iobject * pobject = NULL;Coinitialize (null );Cocreateinstance (clsid_object, clsctx_inproc_server, null, iid_iunknown, (void **) punk );Punk-> QueryInterface (iid_iojbect, (void **) pobject );Punk-> release ();Pobject-> func ();Pobject-> release ();Couninitialize ();
This is a typical framework for cre
First, implement Ismiplemath,iadvancedmath interface and DllGetClassObject ()
1.1 Implement Ismiplemath and Iadvancedmath interface
Let's change the original Cmath class (Cmath is actually "COM technology (ii) COM basics" of that Cmath Class) to implement Ismiplemath interface and Iadvancedmath interface.
The modifications are as follows:
1) Math.h File/*@**#---2003-10-29 21:33:44 (tulip)---#**@ #includ
1, the understanding of COM objects
COM objects are similar to the concepts of classes in C + + language, each instance of a class represents a COM object, it also includes attributes (i.e., state) and methods (i.e., operations), and States reflect the existence of objects, the method being interfaces.
2, COM object
Last night, I was so tired that I was so bored that I was always confused when I got the result for three or more nights: I was unable to create objects by calling C # exported class libraries using vc6, And I used VB to do the same. Re-examine the interface definition and consciously regulate it. How can this problem be solved?Looking at the framework design guide, I suddenly found the following sentence:
If there is no common default constructor (constructor without parameters), the
Because Com Components and . Net Components depend on different internal structures, so they are inherentlyIncompatible. But fortunately Microsoft Company in . Net SDK Some tools are provided. . Net Component generation Com Proxy, or Com Component generation . Net Agents, with these agents and other technologies, each company can . Net Used in th
The differences between com. mysql. jdbc. Driver and com. mysql. cj. jdbc. Driver,
Overview: com. mysql. jdbc. Driver is in mysql-connector-java 5, while com. mysql. cj. jdbc. Driver is in mysql-connector-java 6.1. JDBC to connect to Mysql5 requires com. mysql. jdbc. Driver,
This article does not involve any explanation of the technology of COM, just to say how to write a good DLL form of COM how to use. As shown, I already have a COM server in the form of a DLL and a COM client that uses a COM server:Now this DLL's
1. DCOM
The process transparency of COM is manifested in the Component object and client program can have their own process space, can also share the same process space, COM is responsible for the customer's call to the Component object correctly, and ensure the correctness of the parameters passed. Component objects and client code do not need to consider the details of the invocation delivery, as long as
Reprint: http://www.it1352.com/534235.htmlProblem:I am writing a Windows Form application in. Net to list all running instances of a third-party CAD/CAM software (in this C ASE CATIA) and let the user to choose one of the them to perform couple of automated tasks. For performing automated tasks, I need to get the specific instance of COM objects-compared to Getobject () which gives M e a non-specific
This is the last article in the series "approaching COM Interop" and the most involved technical points. I hope you can understand the description, and it is inevitable that there will be errors. Please kindly advise me.
Back to the beginning, I started to introduce how to import a COM component through programming and generate the corresponding. Net Assembly. In fact, the process is very simple. I persona
Problem Description:The program has been working normally, today the computer re-made the system, and then began to appear this problem: "The given port name does not start with com/com or resolves to a valid serial port." Serial debugging assistant is also not used. Serial cable is not a problem, it is not a hardware problem, the program is not a problem (normal operation on other computers).Exception info
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