DataTable举例

// clrTest1.cpp: 主项目文件。

#include "stdafx.h"

using namespace System;
using namespace System::Data;

int main(array<System::String ^> ^args)
{
    DataTable^ dtable = gcnew DataTable("myTable");
    DataColumn^ column;
    //col 1
    column = gcnew DataColumn("begin_time",System::DateTime::typeid);  
    dtable->Columns->Add(column);
    // col 2
    column = gcnew DataColumn("name",  String::typeid); 
    dtable->Columns->Add(column);
    // col 3
    column = gcnew DataColumn("dscrib",  String::typeid); 
    dtable->Columns->Add(column);
    //primary key
    array<DataColumn^>^ Keys = gcnew array<DataColumn^>(2); 
    Keys[0] = dtable->Columns["name"];
    Keys[1] = dtable->Columns["dscrib"];
    dtable->PrimaryKey = Keys;
    //dataset 
    DataSet^ dset  = gcnew DataSet();
    dset->Tables->Add(dtable);
    //add dataRow
    String^ str = Console::ReadLine();
    int lines ;
    try
    {
        lines = Convert::ToInt32(str);
    }
    catch (...){} 
    DataRow^ row ;
    for(int i = 0 ; i < lines ; i ++)
    {
        row = dtable->NewRow();
        DateTime^ dtime  = DateTime::Now; 
        dtime = dtime->AddHours(i);
       row["begin_time"] = dtime ;
       row["name"] = "John_"+(i+1);
       row["dscrib"] = "it_is_row_"+(i+1);
       dtable->Rows->Add(row);
    }
    //out-put
    for(int i = 0 ; i < dtable->Rows->Count; i ++)
    {
        row = dtable->Rows[i];
        for(int j = 0 ; j < dtable->Columns->Count; j ++)
        {
            Console::WriteLine(row[j]+"	");
        }
        Console::WriteLine();
    }
    Console::ReadKey();
    return 0;
}