sequentially from one field to another. In order to force the ordered layout and allow direct ing of types, and to replicate data between hosted and unmanaged code, you need to add the StructLayoutAttribute feature and specify the LayoutKind. Sequential enumeration value.
4.Platform call (P/Invoke) error handling: One of the inconveniences of Win32 API programming is that errors are often reported in different ways, if an API returns 0, 1, or false, an API uses the out parameter for processing.
meet my vanity, you unexpectedly ..., the heart tens of thousands of "alpaca" Pentium.No way, Microsoft is not all open source, do not need to decompile, directly under the source code to see it.Four, also do not decompile, directly find the source code to see it On Microsoft's website (http://referencesource.microsoft.com/) down code, from Form→containercontrol→scrollablecontrol→control, In the control found NativeWindow, and then found in NativeWindow inside Windowclass, in Windowclass found
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These are common options in the control panel.
Operation:
In C #, you can use the following methods:
Using system. diagnostics; // called when the namespace is called.
// We can use the following method in event processing:
Try
{
Process. Start ("[with the full name of the above file name]");
}
Catch (win32exception win32ex)
{
"/" Indicates a server error in the application. [Dbnetlib] [connectionopen (preloginhandshake ().] A general network error occurs. Check the network documentation. Note: An unhandled exception occurs during the execution of the current Web request. Check the stack trace information for details about the error and the source of the error in the code.
Exception details: system. Data. oledb. oledbexception: [dbnetlib] [connectionopen (preloginhandshake ().] General network error. Check the networ
. OleDb. OleDbException: [DBNETLIB] [ConnectionOpen (PreLoginHandshake ().] General network error. Check the network documentation.
The following is a solution provided by Tsinghua Xiaofei. This error can be effectively solved through the test of IT Information Network!
Microsoft ole db Provider for SQL Server (0x80004005)[DBNETLIB] [ConnectionOpen (PreLoginHandshake ().] A general network error occurs. Check the network documentation.
0 image. heigh
View reply reference
# A color on the second floor will be mad at my machine.
Recently, I don't know what's going on. When Account = LocalSystem, the service cannot be started. It can only be set to./administrator.
Then, an EventLog is added. It cannot be written through WriteEntry.
You cannot delete Messaging. MessageQueue...
Is it true that I want to reinstall the machine?View reply reference
# On the third floor, 60.176.53. *-10-18 tianqiu [unregistered users] I did it again. I don't know w
Error collection Reference document in ASP Tutorial development applicationError type:Adodb.field (0X800A0BCD)One of the BOF or EOF is "true", or the current record has been deleted, and the required operation requires a current record.Reason: When you use SQL to find a database tutorial record, the lookup result is empty, and you do not have an empty record of the situation to deal with.Resolution: 1 If you don't believe that the search result is empty, then you should consider whether your SQL
) --> No element found
Activeserverpages, asp0126 (0x80004005) --> the inclusion file cannot be found.
Microsoft oledbproviderforodbcdrivers (0x80040e14) --> SQL statement error (incorrect field name or Data Type mismatch)
Microsoft oledbproviderforodbcdrivers (0x80040e07) --> SQL statement error (the type of the field to be inserted or updated does not match the data type of the variable)
Microsoft oledbproviderforodbcdrivers (0x80040e57) --> SQL sta
(0x80004005)
The Include file ' xxx.asp ' could not be found.
Cause: As the error hint says, there is no such inclusion.
Solution: If you are sure that you have this file, then your path is wrong, for example, in fact, his path relative to the site root directory should be inc/xxx.asp, then include inside should write inc/xxx.asp, not just xxx.asp. Attached: include:
Error type:
Microsoft OLE DB Provider for ODBC drivers (
.
Resolution: 1 If you don't believe that the search result is empty, then you should consider whether your SQL statement is correct, 2 if it is, then you should add a statement such as "if Rs.eof then" or "do as not rs.eof" to handle the EOF situation.
Error type:
(0x80020009)
An accident occurred.
Cause: It's also when you use SQL to look up database records, the lookup results are empty, and you call the RS ("AA") records in the following code
Solution: either ibid, plus rs.eof judgment and
= New Processstartinfo (); // Set the initial directory of the Startup Process PSI. workingdirectory = application. startuppath; // Set the application or document name of the Startup Process PSI. filename = @" Xwy20151119.txt "; // Set the Startup Process Parameters PSI. Arguments =" "; // Start process resources that contain process startup information Try {Process. Start (PSI );} Catch (System. componentmodel. win32exception ex) {M
, and the effect is as follows:
2. Use Unmanaged DLL in managed code
As mentioned earlier in timer, the following provides a complete and available high-performance timer, and an example of calling an unmanaged DLL is provided by the way. The Code is as follows:
Using system; using system. runtime. interopservices; using system. componentmodel; using system. threading; // debuglzq // specify gray {internal class hiperftimer {[dllimport ("kernel32.dll")] Private Static extern bool queryperforma
Running an ASP program on a WINDOWS+IIS server may cause the database to be unable to update, and the specific error message may be:
1. Microsoft JET Database Engine (0X80040E09) cannot be updated. Database or object is read-only
2. Microsoft OLE DB Provider for ODBC Drivers (0x80004005) [Microsoft][odbc Microsoft Access Driver] operation must use an updatable query.
3. The Microsoft JET Database Engine (0x8000
ASP works normally, but the Microsoft Jet Database Engine error is prompted as long as you connect to the database.
'123456', my computer cannot run because it is used to clear files in batches.1. Check the database connection statement for no errors found;2. All the permissions for viewing folders have been granted to everyone;3. When the database is opened, the system will create a temporary file in the Temporary Folder % SystemRoot %/temp/, while %
Systemroot %/temp/has insufficient Permi
string. The following is a demo Code. The Code mainly calls the Win32 GetTempPath function to obtain the returned temporary path, in this case, you need to return the returned string to the managed code.
// Example of sending the returned values in the managed function back to the managed Function
Class Program
{
// The Win32 GetTempPath function is defined as follows:
// Dword winapi GetTempPath (
// _ In _ DWORD nBufferLength,
// _ Out _ LPTSTR lpBuffer
//); // Mainly pay a
external method Rue This applies to most external methods.
This causes the CLR to cache the error set by the API function after each call to the external method. Then, in the wrapper method, you can get the cached error value by calling the Marshal.GetLastWin32Error method defined in the System.Runtime.InteropServices.Marshal type of the class library. My advice is to check the error values that are expected from the API functions and to throw a perceptible exception for these values. For all o
Usually write the procedure when the error of the solution, not too full, but the general problem should have, hehe, welcome to add new error information and Solutions
activeserverpages,asp0126 (0x80004005)--gt; could not find the include file
microsoftoledbproviderforodbcdrivers (0X80040E21)--gt;sql statement error (data type mismatch or table name (field name) error or table is in edit state, or table does not exist in Conn Open database)
micr
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