db_get_field_assoc_int

คำอธิบาย

Get the contents of field as an integer with specified name.

Name	Description
DBResult:dbresult	The result to get the data from
field[]	The fieldname to get the data from

ส่งคืน

Retrieved value as integer (number).

ตัวอย่าง

// examples.inc

// ...

Examples_CalculateSum(DB:dbConnectionHandle)
{
    // Return value variable
    new ret;

    // Database result set
    new DBResult:db_result_set = db_query("SELECT `value` FROM `examples`");

    // If database result set is valid
    if (db_result_set)
    {
        // Do operations
        do
        {
            // Add value from "example" field to the return value variable
            ret += db_get_field_assoc_int(db_result_set, "value");
        }

        // While next row could be fetched
        while (db_next_row(db_result_set));

        // Free result set
        db_free_result(db_result_set);
    }

    // Return calculated sum
    return ret;
}

// mode.pwn

// ...

#include <examples>

static DB:gDBConnectionHandle;

// ...

public OnGameModeInit()
{
    // ...

    // Create a connection to a database
    gDBConnectionHandle = db_open("example.db");

    // If connection to the database exists
    if (gDBConnectionHandle)
    {
        // Successfully created a connection to the database
        print("Successfully created a connection to database \"example.db\".");
        printf("Calculated sum: %d", Examples_CalculateSum(gDBConnectionHandle));
    }
    else
    {
        // Failed to create a connection to the database
        print("Failed to open a connection to database \"example.db\".");
    }

    // ...

    return 1;
}

public OnGameModeExit()
{
    // Close the connection to the database if connection is open
    if (db_close(gDBConnectionHandle))
    {
        // Extra cleanup
        gDBConnectionHandle = DB:0;
    }

    // ...

    return 1;
}

บันทึก

warning

Using an invalid handle will crash your server! Get a valid handle by using db_query. But it's protected against NULL references.

ฟังก์ชั่นที่เกี่ยวข้องกัน

• db_open: Open a connection to an SQLite database
• db_close: Close the connection to an SQLite database
• db_query: Query an SQLite database
• db_free_result: Free result memory from a db_query
• db_num_rows: Get the number of rows in a result
• db_next_row: Move to the next row
• db_num_fields: Get the number of fields in a result
• db_field_name: Returns the name of a field at a particular index
• db_get_field: Get content of field with specified ID from current result row
• db_get_field_assoc: Get content of field with specified name from current result row
• db_get_field_int: Get content of field as an integer with specified ID from current result row
• db_get_field_assoc_int: Get content of field as an integer with specified name from current result row
• db_get_field_float: Get content of field as a float with specified ID from current result row
• db_get_field_assoc_float: Get content of field as a float with specified name from current result row
• db_get_mem_handle: Get memory handle for an SQLite database that was opened with db_open.
• db_get_result_mem_handle: Get memory handle for an SQLite query that was executed with db_query.
• db_debug_openfiles
• db_debug_openresults