添加项目文件。

GeologyToolkit/MdbHelper.cs

@@ -0,0 +1,64 @@
+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();
+        }
+    }
+}