C# :: MySQL Exception Connection Unexpectedly Terminated
Jul 10, 2014
I am currently developing a sync module using asp.net. I am getting data from an external database (mysql database) The problem is I am getting the error "Connection unexpectedly terminated" when filling the dataset.
Here's my code
string P_contact = "SELECT A.id, B.firstname, B.middlename, B.lastname FROM Accounts A, Contacts B WHERE A.id = B.id";
MySqlDataAdapter db_P_contact = new MySqlDataAdapter(P_contact, conn);
DataSet ds3 = new DataSet();
DataTable dt3 = new DataTable();
I ran into a problem while using while loop.T he declared and initiated local int variable works well with its specified value while running through the 1st run of a while loop. It is set zero while entering the 2nd run and the following unexpectedly. However, the variable still exits. The following is the code with problem.
Code:
#include <stdio.h> int main(void){ const int x=6; char c='y';
I am trying to create a tennis tournament simulator. There are 128 players in the tournament, and 32 seeds. I have a vector filled with 'Player' objects named 'Players'. Each 'Player' object has three member variables, Strength, Ranking, and ATPPoints. When the vector 'Players' is first declared, the default constructor for each 'Player' object is used, which initialises each of the 'Player' objects to zero. I then generate a Strength value in the range of 0-10 for each of these 'Player' objects, and sort them descendingly according to their strength.
I now want to create the draw for a tournament. I declare a vector 'Draw' with 128 'slots'. Each slot initially contains a blank 'Player' object, with its member variables set to 0. I first place the top 32 players throughout the draw such that they do not meet until later rounds as they would be in real life. For the remaining players, I position them in the draw by generating a random number between 0 and 127. Some of the slots 0-127 are occupied by seeded Players. These seeded Players have non zero Strength and Rank values, so to avoid overwriting these slots, I check the Strength value of the 'Player' object in the slot in question. A return value of 0 would indicate an empty slot.
At the beginning of the function, I output the Strength and Rank values of the 'Player' objects already in the draw. This outputs correctly.
for (Player& p : Draw) {// outputs the draw in it's current state, with the already placed seeds as expected. cout << p.GetRanking() << " " << p.GetStrength() << endl; }
PROGRAM:- #include<fstream.h> //for reading and writing files #include<conio.h> //for clrscr() #include<string.h> //for string characters #include<stdio.h> //for gets and puts function #include<process.h> //for exit function #include<iomanip.h> //for setw function #include<dos.h> //for delay and sleep function
how would I write a function that copies a null-terminated string from one char* buffer to another, without using strcpy? I am trying to avoid strcpy because of the null terminator.
My programs complies and runs. However, whenever i try to enter something when prompt to enter the number of accounts i wanted to create my program crashes.
By the way, im using codeblocks.
it says
terminated called after throwing an instance of 'std:: out of range'. what(): basic_string::substr"
Code: #include <iostream> #include "clsInterest.h" #include "clsDate.h" using namespace std;
I have a modal dialog. When I click on a button in the dialog to perform an operation, a non-modal dialog is displayed showing a progress message.
The operation is not successful. It calls WaitForSingleObject and times out. This seems to have an adverse effect on the modal dialog, which strangely becomes non-modal.
The first line displays the modeless dialog. The second line performs the operation, which calls WaitForSingleObject. And the last line destroys the non-modal dialog.
i have tried to search on the Internet but haven't found a suitable result that links in with what I want to do, that is to creation a WPF application and when you press a enable button it will enable the LAN and when I click the disable button it will disable the LAN until i click the enable button again. Now I know how to creation a WPF and the buttons, but how would I do the disabling LAN and enabling LAN?
By LAN i mean just the networking adapters, so that the PC cannot connect to a router and then the Internet.
I have so far tried MySQL++, ODBC, SimpleDB, and the MySQL C++ Connector. All of them give me a FLOOD of errors in the output. Is there an easy way to connect?
I created a .h file for mysql connections. In my example file, I created an array of my class and made connection with the database for each subscript of the class object one by one. Then I checked if the connection in the previous subscripts are active or not, I found all the previous connection are disconnected.
I want to establish multiple connection with database at a time.
The resultset is always null and the connection is alive. The VS2013 debugger says that mysqlcppconn.dll has no debugging symbols. Tested the query on a mysql console and it worked fine, it returned 1.
1>c:program files (x86)mysqlmysql connector c++ 1.1.3includecppconnsqlstring.h(38): warning C4251: 'sql::SQLString::realStr' : class 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' needs to have dll-interface to be used by clients of class 'sql::SQLString'
Wondering why I cannot communicate with my microcontroller dspic33 with the Hyperterminal program. In the sample test code, I also cannot use printf. They have it set up differently and I am wondering if it is possible to redirect the output of the printf, scanf functions to the port I am using?
I have my application database in the AppDataRoaming folder. I'm trying to create a connection string for Telerik reporting, up until now I've had a connection string in a settings class that is put together like this:
The path is:
data source=C:UsersSynlightAppDataRoamingAppNamedataAppDB.sqlite
I am currently writing a small windos form app which relies on an internat connection.
The only issue I have is trying to find out how to force the app to reconnect if the internet drops out without the app crashing. From what I have read I could use "try and catch" but I am not sure how to do this.
The code I have so far is: for testing I am using [URL] as the web site target.
how to give a database connection to a c++ code i am using turbo c++ as an editor and if i have oracle 11g client, odbc as a driver , what else i require and how to link these things in a code.
I am trying to write a C code with embedded MySQL with server and client options. I am trying to important a csv data file for MySQL server and client.
I saw on internet like: LOAD DATA LOCAL INFILE 'data.csv' INTO TABLE test FIELDS TERMINATED BY',' LINES TERMINTED BY' ';
But I think that line is for SQL workspace. How to write in C format?
I was created the mysql database in my Pc. This database connecting with vc++ code Using MySQL C++ Connection Example in Visual Studio. I done this work in single PC. It's working good. i viewed the table values using vc++ application.
But now want to connecting the database through lan connection. I refered the below link but i'm not clear.Step # 5 Grant access to remote IP address
For your reference, (I installed)
PC1 - visual studio 2003, mysql 5.6 for win32 & mysql connector (Ver : mysql-connector-c++-1.0.5-win32), OS : XP SP2, IP : 192.168.100.123
PC2 - mysql 5.6, OS: XP SP3, IP: 192,168,100.9
Table created in PC2, database name "test". server = 'localhost', user = 'root', passwd = "".
I like to connect PC1 & PC2 through Lan & access the table using vc++ code.
How can i view PC2's database table values in PC1?
I am designing a server program in C++ and now that everything works for the clients, I would like to implement a command line. The code waits for a connection with the predefined function "new_socket = accept(serversocket,(struct sockaddr *)&client,&addrsize);". I already made a function for the command line but I can't find a way (in my brain or on the web) to accept commands (getline) whilst no connection is accepted yet. (I mean wait for a connection. If no connection, then be ready to receive some arguments from the command line). Here is part of the code:
cout << "Waiting for connection/command..."; command_line_function(); //getline(cin,string) while(true){ new_socket = accept(serversocket,(struct sockaddr *)&client,&addrsize); if(new_socket == INVALID_SOCKET){ //INVALID_SOCKET is an error somehow. error_function();} cout << "ACCEPTED "; //etc. }
