64 lines
1.7 KiB
C#
64 lines
1.7 KiB
C#
|
using System;
|
|||
|
|
using System.Data;
|
|||
|
|
using System.Data.OleDb;
|
|||
|
|
|
|||
|
|
namespace GeologyToolkit
|
|||
|
|
{
|
|||
|
|
internal class MdbHelper
|
|||
|
|
{
|
|||
|
|
/// <summary>
|
|||
|
|
/// 构建函数
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="fileName">MDB文件（含完整路徑）</param>
|
|||
|
|
public MdbHelper(string fileName)
|
|||
|
|
{
|
|||
|
|
this.fileName = fileName;
|
|||
|
|
connectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileName;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private readonly string connectionString;
|
|||
|
|
private readonly string fileName;
|
|||
|
|
private OleDbConnection odcConnection;
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// 断开连接（关闭据库文件）
|
|||
|
|
/// </summary>
|
|||
|
|
public void Close()
|
|||
|
|
{
|
|||
|
|
odcConnection.Close();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// 根据sql命令返回一个DataSet
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="sql">sql命令</param>
|
|||
|
|
/// <returns>以DataTable形式返回数据</returns>
|
|||
|
|
public DataSet GetDataSet(string sql)
|
|||
|
|
{
|
|||
|
|
DataSet ds = new DataSet();
|
|||
|
|
|
|||
|
|
try
|
|||
|
|
{
|
|||
|
|
OleDbDataAdapter adapter = new OleDbDataAdapter(sql, odcConnection);
|
|||
|
|
adapter.Fill(ds);
|
|||
|
|
}
|
|||
|
|
catch (Exception)
|
|||
|
|
{
|
|||
|
|
throw new Exception("sql语句： " + sql + " 执行失败！");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return ds;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// 建立连接（打开数据库文件）
|
|||
|
|
/// </summary>
|
|||
|
|
public void Open()
|
|||
|
|
{
|
|||
|
|
// 建立连接
|
|||
|
|
odcConnection = new OleDbConnection(connectionString);
|
|||
|
|
// 打开连接
|
|||
|
|
odcConnection.Open();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|