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CYQ.Data Components Getting Started Guide [Part 5]-[MProc Execute Stored Procedures or SQL]

Guide | Comment(121) | Browse(29724) | pubdate :2011/7/2 20:19:22

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In this section:

continue on a content, this section describes MProc class-related operations.

1: MProc execute stored procedure

2: MProc execute SQL operations

I：Constructor

Method Prototype :

public MProc(object procNamesEnum)

public MProc(object procName, string conn)

Description:

Constructor and MAction usage of the relevant operating parameters can be MAction.

Example 1：Pass stored procedure name

//Stored procedure name passed in the default configuration items to take Conn database link
MProc proc = new MProc(ProcNames.GetUserList);//Passing through the enumeration

Example 2：Pass stored procedure name and custom database link

//Into the database a new database link configuration items Conn

MProc proc = new MProc("GetUserList","ChatConn");

//Into the database directly link the new database link string

MProc proc = new MProc("GetUserList","Server=.;database=Chat;uid=sa;pwd=xxxxx");

//Multi-use agreement under the name of the database configuration items from ChatConn links

MProc proc = new MProc(P_ChatEnum.GetUserList);

Example 3：Pass SQL statement

Note: Only supported in V1.5 version of the above.

/ / Execute custom SQL statement, the default configuration items database link from Conn

MProc proc = new MProc("select * from Users");

/ / Execute custom SQL statements from the configuration items database link ChatConn
MProc proc = new MProc("select * from Users","ChatConn");

II：Parameterization

Method Prototype :

public void Set(object paraName, object value)

public void Set(object paraName, object value,SqlDbType sqlDbType)

public void Clear()

Example 1：

//As stored procedures or parameterized SQL statement to set parameters
proc.Set(GetUserList.ID, 888);//Enumeration method to pass

Example 2：

proc.Set(Users.ID, 888,SqlDbType.Int);//More than in the last example of a parameter.

Example 3：

proc.Clear();//Clear all Set parameters.

III：Execute Method Operation

Method Prototype :

public MDataTable ExeMDataTable() / / List of query

public int ExeNonQuery() / / Add / Update / Delete

public T ExeScalar<T>() / / Return a single value of the first row first column

Example 1：

MDataTable table = proc.ExeMDataTable();// return MDataTable

Example 2：

int result = proc.ExeNonQuery();//Insert, update, delete, return the number of rows affected.

Example 3：

string result = proc.ExeScalar<string>();//Statement is executed, returns the first row first column value.

IV：ReturnValue and DataBase Close

Method Prototype :

public int ReturnValue

public void Close()

Example 1：

MDataTable table= proc.ExeMDataTable();
int value = proc.ReturnValue;//If the stored procedure is executed, the return value obtained by the total number of records.

Example 2：Close manually

MProc proc = new MProc(ProcNames.GetList);
MDataTable table= proc.ExeMDataTable();
int value = proc.ReturnValue;
proc.Close();//Close the database links after the implementation of

V：A complete example

Example ：

Examples of use:

Instantiation: using(MProc proc = new MProc(ProcNames.GetList))

                                        {
Add parameters:                      proc.Set(GetList.ID, 10);
Access list:                              MDataTable table = proc.ExeMDataTable();

Take the return value: int count=proc.ReturnValue;

Bound control: table.Bind(GridView1);

}

Chinese version of the link：http://www.cyqdata.cn/cyqdata/article-detail-415

More tutorials：

1：CYQ.Data Components Getting Started Guide [Part 1]

2：CYQ.Data Components Getting Started Guide [Part 2]-[MAction Data Query- Fill And Select]

3：CYQ.Data Components Getting Started Guide [Part 3]-[MAction Get And Set Value]

4：CYQ.Data Components Getting Started Guide [Part 4]-[MAction Insert Delete Update]

5：CYQ.Data Components Getting Started Guide [Part 5]-[MProc Execute Stored Procedures or SQL]

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