//添加两个com组件引用 //Microsoft ADO Ext. 2.8 for DDL and Security //Microsoft ActiveX Data Objects 2.8 Library   using System; using System.Collections.Generic; using System.Linq; using System.Text; using ADOX; using System.IO; namespace WebRequestTest.Common {     public static class AccessDbHelper     {         /// <summary>         /// 创建access数据库         /// </summary>         /// <param name="filePath">数据库文件的全路径，如 D:\\NewDb.mdb</param>         public static bool CreateAccessDb(string filePath)         {             ADOX.Catalog catalog = new Catalog();             if (!File.Exists(filePath))             {                 try                 {                     catalog.Create("Provider=Microsoft.Jet.OLEDB.4.0;DData Source=" + filePath + ";Jet OLEDB:Engine Type=5");                 }                 catch (System.Exception ex)                 {                     return false;                 }             }             return true;         }         /// <summary>         /// 在access数据库中创建表         /// </summary>         /// <param name="filePath">数据库表文件全路径如D:\\NewDb.mdb 没有则创建 </param>         /// <param name="tableName">表名</param>         /// <param name="colums">ADOX.Column对象数组</param>         public static void CreateAccessTable(string filePath, string tableName, params ADOX.Column[] colums)         {             ADOX.Catalog catalog = new Catalog();             //数据库文件不存在则创建             if (!File.Exists(filePath))             {                 try                 {                     catalog.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Jet OLEDB:Engine Type=5");                 }                 catch (System.Exception ex)                 {                 }             }             ADODB.Connection cn = new ADODB.Connection();             cn.Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath, null, null, -1);             catalog.ActiveConnection = cn;             ADOX.Table table = new ADOX.Table();             table.Name = tableName;             foreach (var column in colums)             {                 table.Columns.Append(column);             }            // column.ParentCatalog = catalog;             //column.Properties["AutoIncrement"].Value = true; //设置自动增长             //table.Keys.Append("FirstTablePrimaryKey", KeyTypeEnum.adKeyPrimary, column, null, null); //定义主键             catalog.Tables.Append(table);             cn.Close();         }             //========================================================================================调用            //ADOX.Column[] columns = {            //                     new ADOX.Column(){Name="id",Type=DataTypeEnum.adInteger,DefinedSize=9},            //                     new ADOX.Column(){Name="col1",Type=DataTypeEnum.adWChar,DefinedSize=50},            //                     new ADOX.Column(){Name="col2",Type=DataTypeEnum.adLongVarChar,DefinedSize=50}            //                 };            // AccessDbHelper.CreateAccessTable("d:\\111.mdb", "testTable", columns);     } }