1、OleDbDataReader用于從數(shù)據(jù)庫(kù)中讀取數(shù)據(jù)，參考代碼如下：

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OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = @"Provider=microsoft.ace.oledb.12.0;Data Source=|DataDirectory|湖州工廠故障現(xiàn)象及原因數(shù)據(jù)庫(kù).accdb;";
//查找故障現(xiàn)象表中有幾行，用于下面定義數(shù)組大小用
OleDbCommand com = new OleDbCommand("SELECT COUNT(故障現(xiàn)象代碼) AS NUM FROM 故障現(xiàn)象", conn);
conn.Open();
OleDbDataReader drNew = com.ExecuteReader();
drNew.Read();
int F_rows = int.Parse(drNew["NUM"].ToString());
drNew.Close();
conn.Close();

2、OleDbDataAdapter用于鏈接數(shù)據(jù)庫(kù)，供DataSet使用，代碼如下：

OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = @"Provider=microsoft.ace.oledb.12.0;Data Source=|DataDirectory|湖州工廠故障現(xiàn)象及原因數(shù)據(jù)庫(kù).accdb;";
//獲得故障現(xiàn)象表中的故障現(xiàn)象列表
OleDbDataAdapter Fname_Adapter = new OleDbDataAdapter("select 故障現(xiàn)象 from 故障現(xiàn)象", conn);
DataSet Fname_table = new DataSet();
Fname_Adapter.Fill(Fname_table, "故障現(xiàn)象");
int Fname_sum = Fname_table.Tables["故障現(xiàn)象"].Rows.Count;
string[] Fname = new string[Fname_sum];
for (int i = 0; i < Fname_table.Tables["故障現(xiàn)象"].Rows.Count;i++ )
{
    Fname[i] = (string)Fname_table.Tables["故障現(xiàn)象"].Rows[i]["故障現(xiàn)象"];
}
Fname_table.Dispose();
int[] F_times = new int[Fname_sum];
//獲取查詢記錄中Fxxx的原始數(shù)據(jù)（這個(gè)數(shù)據(jù)有些是重復(fù)的，要對(duì)其進(jìn)行處理）。
OleDbDataAdapter Fxxx_Adapter = new OleDbDataAdapter("select 故障現(xiàn)象 from 故障記錄", conn);
DataSet Fxxx_table = new DataSet();
Fxxx_Adapter.Fill(Fxxx_table, "故障記錄");
//string iii = (string)Fxxx_table.Tables["故障記錄"].Rows[2]["故障現(xiàn)象"];
int F_contents_sum = Fxxx_table.Tables["故障記錄"].Rows.Count;    //有幾條故障記錄
string[] F_contents = new string[F_contents_sum];
for (int j = 0; j < F_contents_sum; j++)
{
    F_contents[j] = (string)Fxxx_table.Tables["故障記錄"].Rows[j]["故障現(xiàn)象"];
}
for (int j = 0; j < F_contents_sum; j++)
{
    for(int k=0;k            
            
                        

            分享題目：OleDbDataReader、OleDbDataAdapter、DataSet的使用方法            

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