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107 lines
2.5 KiB
107 lines
2.5 KiB
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#include "ado.h"
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_ConnectionPtr m_pConnection;
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_RecordsetPtr m_pRecordset;
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HRESULT hr;
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bool open(char* username, char* password, char* dbname, char* ip)
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{
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try
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{
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::CoInitialize(NULL); //初始化COM环境
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m_pConnection.CreateInstance(__uuidof(Connection)); //创建连接对象
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char connStr[200] = "";
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sprintf(connStr, "Provider=SQLOLEDB;Data Source=%s;Initial Catalog=%s;", ip, dbname);
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hr = m_pConnection->Open(connStr, username, password, -1);
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if (hr != S_OK)
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return true;
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}
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catch (_com_error e)
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{
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return true;
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}
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return false;
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}
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// 有输入参数的查询
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int QuerySQL(char *SQL, int inputValueCount, int * outputColumn, int * outputValueCount, char **** outputValue)
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{
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Fields * fields = NULL;
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long ColCount = 0;
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*outputColumn = 0;
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*outputValueCount = 0;
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m_pRecordset.CreateInstance(__uuidof(Recordset));
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m_pRecordset->Open(SQL, m_pConnection.GetInterfacePtr(), adOpenStatic, adLockOptimistic, adCmdText);
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hr = m_pRecordset->get_Fields(&fields); //得到记录集的字段集和
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if (SUCCEEDED(hr))
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{
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fields->get_Count(&ColCount);
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*outputValueCount = (int)ColCount;
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}
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if (*outputValueCount == 0)
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return 0;
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int index = 0;
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// 开始分配内存并且存储
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*outputValue = (char ***)calloc((*outputValueCount) + 1, sizeof(char**));
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while (!m_pRecordset->adoEOF)
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{
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(*outputValue)[index] = (char **)calloc((*outputColumn) + 1, sizeof(char *));
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for (long i = 0; i < ColCount; i++)
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{
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BSTR bstrColName=NULL;
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fields->Item[i]->get_Name(&bstrColName);
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(*outputValue)[index][i] = (char *)calloc(1000, sizeof(char));
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_variant_t taskStyle = NULL;
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taskStyle = m_pRecordset->GetCollect(bstrColName);
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const char* str;
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_bstr_t bst_t = (_bstr_t)taskStyle;
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str = (const char*)bst_t;
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strcpy((*outputValue)[index][i], str);
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}
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m_pRecordset->MoveNext();///移到下一条记录
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index++;
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}
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return 0;
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}
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// 执行查询
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int QuerySQLNoInputParam(char *SQL, int * outputColumn, int * outputValueCount, char **** outputValue)
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{
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return QuerySQL(SQL, 0, outputColumn, outputValueCount, outputValue);
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}
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// 执行删除更新
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int ExecuteSQLNoInputParam(char *SQL)
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{
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return ExecuteSQL(SQL, 0, NULL);
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}
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int ExecuteSQL(char *SQL, int valueCount, char **value)
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{
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try
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{
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m_pConnection->Execute(_bstr_t(SQL), 0, adCmdText);
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}
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catch (_com_error e)
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{
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printf("插入失败\n");
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printf(e.Description());
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return -1;
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}
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return 0;
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}
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void close(void)
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{
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if (m_pRecordset != NULL) {
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//m_pRecordset->MoveFirst();
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m_pRecordset->Close();
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m_pConnection->Close();
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}
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::CoUninitialize(); //释放环境
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} |