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2026-06-18

删除图 - DeleteGraph ​

函数简介 ​

删除指定的图对象，释放相关的内存资源。

接口名称 ​

DeleteGraph

DLL调用 ​

c
int32_t DeleteGraph(int64_t instance, int64_t graphPtr);

参数说明 ​

参数名类型说明
instance长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
graphPtr长整数型图的指针，由 CreateGraph 接口返回。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long graphPtr = ola.CreateGraph("[{\"directed\":false,\"from\":\"上海\",\"to\":\"北京\",\"weight\":3.0},{\"directed\":false,\"from\":\"北京\",\"to\":\"深圳\",\"weight\":5.0}]");
if (graphPtr != 0) {
    ola.DeleteGraph(graphPtr); // 必须释放图内存
}
csharp
using OLAPlug;

var ola = new OLAPlugServer();
long graphPtr = ola.CreateGraph(@"[{"directed":false,"from":"上海","to":"北京","weight":3.0},{"directed":false,"from":"北京","to":"深圳","weight":5.0}]");
if (graphPtr != 0)
{
    ola.DeleteGraph(graphPtr); // 必须释放图内存
}
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
graph_ptr = ola.CreateGraph(r'[{"directed":false,"from":"上海","to":"北京","weight":3.0},{"directed":false,"from":"北京","to":"深圳","weight":5.0}]')
if graph_ptr != 0:
    ola.DeleteGraph(graphPtr); // 必须释放图内存
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
long graphPtr = ola.CreateGraph("[{\"directed\":false,\"from\":\"上海\",\"to\":\"北京\",\"weight\":3.0},{\"directed\":false,\"from\":\"北京\",\"to\":\"深圳\",\"weight\":5.0}]");
if (graphPtr != 0) {
    ola.DeleteGraph(graphPtr); // 必须释放图内存
}
cpp
var ola = com("OlaPlug.OlaSoft")
var graphPtr = ola.CreateGraph("[{\"directed\":false,\"from\":\"上海\",\"to\":\"北京\",\"weight\":3.0},{\"directed\":false,\"from\":\"北京\",\"to\":\"深圳\",\"weight\":5.0}]")
if(graphPtr) {
    ola.DeleteGraph(graphPtr); // 必须释放图内存
}
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
graphPtr = ola.CreateGraph("[{\"directed\":false,\"from\":\"上海\",\"to\":\"北京\",\"weight\":3.0},{\"directed\":false,\"from\":\"北京\",\"to\":\"深圳\",\"weight\":5.0}]")
If graphPtr <> 0 Then
    ola.DeleteGraph(graphPtr); // 必须释放图内存
}
text
.局部变量 ola, OLAPlug
ola.创建 ()
graphPtr ＝ ola.CreateGraph (“[{\“directed\“:false,\“from\“:\“上海\“,\“to\“:\“北京\“,\“weight\“:3.0},{\“directed\“:false,\“from\“:\“北京\“,\“to\“:\“深圳\“,\“weight\“:5.0}]“)
.如果真 (graphPtr ≠ 0)
    ola.DeleteGraph(graphPtr); // 必须释放图内存
}
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var graphPtr = ola.CreateGraph("[{\"directed\":false,\"from\":\"上海\",\"to\":\"北京\",\"weight\":3.0},{\"directed\":false,\"from\":\"北京\",\"to\":\"深圳\",\"weight\":5.0}]");
if(graphPtr){
    ola.DeleteGraph(graphPtr); // 必须释放图内存
}
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
长整数 graphPtr = ola.CreateGraph("[{\"directed\":false,\"from\":\"上海\",\"to\":\"北京\",\"weight\":3.0},{\"directed\":false,\"from\":\"北京\",\"to\":\"深圳\",\"weight\":5.0}]")
如果真 (graphPtr ≠ 0)
{
    ola.DeleteGraph(graphPtr); // 必须释放图内存
}
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long graphPtr = ola.CreateGraph("[{\"directed\":false,\"from\":\"上海\",\"to\":\"北京\",\"weight\":3.0},{\"directed\":false,\"from\":\"北京\",\"to\":\"深圳\",\"weight\":5.0}]");
if (graphPtr != 0) {
    ola.DeleteGraph(graphPtr); // 必须释放图内存
}

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
long graphPtr = CreateGraph(instance, "[{\"directed\":false,\"from\":\"上海\",\"to\":\"北京\",\"weight\":3.0},{\"directed\":false,\"from\":\"北京\",\"to\":\"深圳\",\"weight\":5.0}]");
if (graphPtr != 0) {
    DeleteGraph(instance, graphPtr);
}
csharp
using System.Runtime.InteropServices;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();

long instance = CreateCOLAPlugInterFace();
long graphPtr = CreateGraph(instance, @"[{"directed":false,"from":"上海","to":"北京","weight":3.0},{"directed":false,"from":"北京","to":"深圳","weight":5.0}]");
if (graphPtr != 0) {
    DeleteGraph(instance, graphPtr);
}
python
from ctypes import CDLL, c_int, c_int64

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
graph_ptr = ola.CreateGraph(instance, b'[{"directed":false,"from":"上海","to":"北京","weight":3.0},{"directed":false,"from":"北京","to":"深圳","weight":5.0}]')
if graph_ptr:
    DeleteGraph(instance, graphPtr);
}

返回值 ​

返回值说明
1成功。
0失败。

注意事项 ​

项目说明
删除行为删除操作会释放图对象占用的所有内存资源。
删除行为删除后不能再使用该图指针进行任何操作。
删除行为删除操作不可逆，请确保不再需要该图对象。