88 lines
2.7 KiB
C#
88 lines
2.7 KiB
C#
using System;
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using System.Data;
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using System.Data.OleDb;
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using Bentley.Internal.MstnPlatformNET;
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namespace GeologyToolkit
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{
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internal class MdbHelper
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{
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/// <summary>
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/// 构建函数
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/// </summary>
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/// <param name="fileName">MDB文件（含完整路徑）</param>
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public MdbHelper(string fileName)
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{
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this.fileName = fileName;
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connectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileName;
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}
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private readonly string connectionString;
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private readonly string fileName;
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private OleDbConnection odcConnection;
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/// <summary>
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/// 断开连接（关闭据库文件）
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/// </summary>
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public void Close()
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{
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odcConnection.Close();
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}
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/// <summary>
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/// 根据sql命令返回一个DataSet
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/// </summary>
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/// <param name="sql">sql命令</param>
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/// <returns>以DataTable形式返回数据</returns>
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public DataSet GetDataSet(string sql)
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{
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DataSet ds = new DataSet();
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try
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{
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OleDbDataAdapter adapter = new OleDbDataAdapter(sql, odcConnection);
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adapter.Fill(ds);
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}
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catch (Exception)
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{
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throw new Exception("sql语句： " + sql + " 执行失败！");
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}
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return ds;
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}
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//根据表名返回一个DataSet
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public DataSet GetDataSetByTableName(string tableName)
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{
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string sql = "select * from " + tableName;
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return GetDataSet(sql);
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}
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//查询所有的表名
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public DataTable GetTables()
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{
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DataTable dt = odcConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
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return dt;
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}
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public void Open12()
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{
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//string connStr = @"Driver={Microsoft Access Driver (*.mdb)};DBQ=" + fileName;
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string connectionString = $"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={fileName};Persist Security Info=False;";
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using (OleDbConnection connection = new OleDbConnection(connectionString))
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{
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connection.Open();
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// Your code to interact with the database
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}
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}
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/// <summary>
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/// 建立连接（打开数据库文件）
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/// </summary>
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public void Open()
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{
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// 建立连接
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odcConnection = new OleDbConnection(connectionString);
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// 打开连接
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odcConnection.Open();
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}
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}
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} |