method, that is, the inherited class method must accept any conditions (parameters) that can be accepted by any base class method ). Similarly, the inherited class must comply with all subsequent conditions of the base class, that is, the behavior and output of the inherited class method must not violate any constraints established by the base class, it does not confuse users with the output of inherited class methods.
In this way, we have a contract-based LSP, which is an enhancement of LSP.
R
:
Add the following code to the background class:
Imports system. Data. sqlclient
'Get the data view. The parameter is the column to be sorted.
Private function getdv (byval strsort as string) as dataview
'Define database connection
Dim DV as dataview
Dim cn as new sqlconnection ()
Try
'Initialize the connection string
CN. connectionstring = "Data Source = pmserver; initial catalog = n
| userflag. B;
Sqldataadapter ADP = new sqldataadapter (Comm );Datatable dtable = new datatable ();ADP. Fill (dtable );
Userflag = (userflag) enum. parse (typeof (userflag), dtable. Rows [0] [11]. tostring ());
}}
After processing, userflag is a combination of various types in the database.
We can also perform bitwise operations on it.
If you want to add userflag. C, perform the following op
1. How to Use Access
I used a little access two years ago. I feel that it is a lot of small problems and it will not be used again. This time
Program It is placed on a virtual host with a gigabit network. This virtual host does not support SQLite. It is good to read data. If you write something into the database, an error will be reported, some disk I/O error occured. It's amazing. Try another VM. No problem. It is not a problem with my program. Later, only access is allowed. Reading database
receiving the object. Then you can useSqlbulkcopyImport data to the database. The biggest advantage of this method is that it does not need to process complicated text formats.
Here is a piece of test code:
Using system; using system. collections. generic; using system. data. sqlclient; using system. data; using system. runtime. serialization. formatters. binary; using system. diagnostics; using system. io; namespace consoleapplication1 {class program {static void main (string [] ARGs)
. For example:+ ┃ 文┣ ┣ + 文┃ ┣- ┗---English +-┗--math
The following are four implementation methods:
First:The first method is the simplest. The first method is to implement the first method. The others are then supplemented. // first, the datatable public dataview DRV (string query) {oledbconnection conn = new oledbconnection () is created (); conn. connectionstring = "provider = Microsoft. jet. oledb.4.0; Data Source = D: \ xcrs. mdb "; Conn. open (); oledbdataadapter
the. xlsand. XLSX files (supports connection strings of excel2003 and excel2007) // remarks: "HDR = yes;" indicates that the first row of an Excel file is a column name rather than data. "HDR = no;" is the opposite of the previous one. // "IMEX = 1" if the data types in the column are inconsistent, use "IMEX = 1" to avoid data type conflicts.
Oledbconnection conn = new oledbconnection (strconn );Oledbdataadapter ADP = new oledbdataadapter ("sel
follows:
Public static string GetDataFromServer (){DataSet ds = new DataSet (); // Set value of connection string hereString strConnectionString = ""; // Insert your connection string value hereSqlConnection con = new SqlConnection (strConnectionString ); // Write the select command value as first parameterSqlCommand command = new SqlCommand ("SELECT * FROM Person", con );SqlDataAdapter adp = new SqlDataAdapter (command );Int retVal =
* from [sheet1$]", conn);
OleDbDataAdapter ADP = new OleDbDataAdapter (CMD);
DataSet ds = new DataSet ();
Adp. Fill (DS);
Datagridview2.datasource = ds. Tables[0];
Traversing the contents of a schema[CSharp]View Plaincopy
DataTable DT = conn. GetSchema ();
for (int i = 0; i
{
TextBox1.Text + = dt. Columns[i]. Caption;
if (i + 1
{
TextBox1.Text + = ",";
}
}
content to do, there will be no problem.Run the ADS1.2 integrated development environment, click the File->open option, select the project file we use the/ucos V6.0/EXP11 drawing in the CD API function as an example select EXP11.MCP and click Open.Select the file you want to compile in a blank location in front of the corresponding folder to select, the header file library file is not selected, because it has been included in the source code. Click Make to compile the link.4. Be sure to turn on
Maintain number ranges for CM folders
CMTCUS42
Maintain number ranges for Baseline
Number range for maintenance start
FBN1
Accounting Document Number Ranges
Account voucher number Range
FNS1
Collateral Number Range
Accessory Number Range
FOV0
Rental Agreement Number Range
Lease Agreement Number Range
FOW0
granularity can be a package (component), or an entity such as a class, but an application often contains many classes, so a package (component) with a larger scale is more appropriate as a release granularity.The reuse publication equivalence principle shows us the design guidelines for the package:The elements (classes) in a package are either reusable or non-reusable.SummaryThe Reuse publishing Equivalence principle (REP) regulates the principle of package design from a user point of view: W
1 2 3 - 2 1 - */ the intMain () - { - intN, M; - while(~SCANF ("%d%d", n, m)) { +dp[0][0] =0; - for(inti =1; I ) { +scanf"%d", A +i); Adp[i][0] =0; at } - for(inti =1; I ) { -scanf"%d", B +i); -dp[0][i] =0; - } - /* in with these three parts - Dp[i-1][j-1] to Dp[i-1][j]-dp[i-1][j-1] + Dp[i][j-1]-dp[i-1][j-1] - if not match dp[i][j] = dp[i-1][j]-dp[i-1][j-1] + dp[i][j-1]-dp[i-1][j-1] + dp[i-1][j-1] the match
inheriting class methods should not violate any constraints established by the base class, and the user cannot be confused about the output of inheriting class methods.Thus, we have a contract-based LSP, and the contract-based LSP is an enhancement of the LSP. Reference : http://en.wikipedia.org/wiki/Design_by_contract Acyclic Dependencies Principle (ADP) – The principle of non-cyclic relianceThe dependency structure between packages must be a dire
connected this hardware one step after one select the Add a new hardware device one step at a time select Install I manually choose the hardware from the list one step by one select one Show all devices one choice (process longer) one from disk installation One browse, specify drive to c \ Program Files\uarmjtag\driver\lptjtag file, click OK, then click Next to install the driver.(2) Simulation debuggingClick "Initialize Configuration", in the popup dialog box, "Processor type", select the appr
\giveio.inf file, click OK, install driver
Install the Jtag driver installation files in the 02-uarmjtag2.0 directory, the steps are as follows: (1) After adding the driver UarmJtag2.0 installation, please connect the up-netarm3000 a simple emulator (C Jtag) to a PC, and then add the hardware, the steps are as follows (Take Windows XP as an example): Start a Control Panel add hardware one step at a time I have connected this hardware one step after one select one to add a new hardware device o
, there is a child node is not in the ring, with the child node has a chain, the link to the tree with the root of U, (+1) You can make all the child nodes in the ringDp[u][0]=min (dp[u][0],sum-dp[v][0]+dp[v][2]+1);3, there is a child node is not in the ring, the rest of their own processing,Dp[u][2]=min (Dp[u][2],sum-dp[v][0]+min (dp[v][1],dp[v][2));4, there are two not in the ring, the two plus a side together can make all in the ringDp[u][0]=min (Dp[u][0],sum-dp[v][0]-dp[k][0]+min (dp[v][1],d
pc power on , open HyperTerminal set some constants to confirm that the arm machine is normal. 2, the HyperTerminal configuration to the State of Vivi. 3, the installation of ads and Giveio Mobile and so on according to the experimental content to do, there will be no problem. Run the ADS1.2 Integrated development Environment , click the file->open option , select the project file we /ucos on the CD v6.0/exp11 Drawing API functions For example Select exp11.mcp and click Open. Select the file
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