看到CSDN上不断兄弟姐妹提问关于c#操作Access的问题，于是本人利用闲暇将c#操作Access的方法加以总结，主要解决的问题有：
创建mdb
创建table
读取table内容
查询table中的内容
向table中插入数据
删除table中的记录
向table中插入照片
读取table中的照片等。
另：本人水平有限，不当之处还请斧正。废话少说，开始正题。

文介绍C#访问操作Access数据库的基础知识，并提供一个相关的例程。C#的ADO.NET还不能通过编程方式创建全新的ACCESS(MDB)数据库，所以还只能使用ADOX这个来自COM的链接库来操作。
主要知识点如下：
using System.Data.OleDb;
using System.Data;
连接字符串：String connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=product.mdb";
建立连接：OleDbConnection connection = new OleDbConnection(connectionString);
使用OleDbCommand类来执行Sql语句：
OleDbCommand cmd = new OleDbCommand(sql, connection);
connection.Open();
cmd.ExecuteNonQuery();

1.创建mdb库，例程如下：
需要注意的是：参数mdbPath是mdb的完整路径（不包含表的名称）。例如：D:\\test.mdb

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//创建mdb   
 public static bool CreateMDBDataBase(string mdbPath)  
 {  
     try 
     {  
         ADOX.CatalogClass cat = new ADOX.CatalogClass();  
         cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath + ";");  
         cat = null;  
         return true;  
     }  
     catch { return false; }  
 } 
       //创建mdb
        public static bool CreateMDBDataBase(string mdbPath)
        {
            try
            {
                ADOX.CatalogClass cat = new ADOX.CatalogClass();
                cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath + ";");
                cat = null;
                return true;
            }
            catch { return false; }
        }
 

2.创建具体的表，例程如下：
通常一个mdb的可以包含n个表。下面的程序主要是创建一个table。
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//新建mdb的表   
//mdbHead是一个ArrayList，存储的是table表中的具体列名。   
public static bool CreateMDBTable(string mdbPath,string tableName, ArrayList mdbHead)  
{  
    try 
    {  
        ADOX.CatalogClass cat = new ADOX.CatalogClass();  
        string sAccessConnection  
            = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath;  
        ADODB.Connection cn = new ADODB.Connection();  
        cn.Open(sAccessConnection, null, null, -1);  
        cat.ActiveConnection = cn;  
 
        //新建一个表   
        ADOX.TableClass tbl = new ADOX.TableClass();  
        tbl.ParentCatalog = cat;  
        tbl.Name = tableName;  
 
        int size = mdbHead.Count;  
        for (int i = 0; i < size; i++)  
        {  
            //增加一个文本字段   
            ADOX.ColumnClass col2 = new ADOX.ColumnClass();  
            col2.ParentCatalog = cat;  
            col2.Name = mdbHead[i].ToString();//列的名称   
            col2.Properties["Jet OLEDB:Allow Zero Length"].Value = false;  
            tbl.Columns.Append(col2, ADOX.DataTypeEnum.adVarWChar, 500);  
        }  
        cat.Tables.Append(tbl);   //这句把表加入数据库(非常重要)   
        tbl = null;  
        cat = null;  
        cn.Close();  
        return true;  
    }  
    catch { return false; }  
} 
        //新建mdb的表
        //mdbHead是一个ArrayList，存储的是table表中的具体列名。
        public static bool CreateMDBTable(string mdbPath,string tableName, ArrayList mdbHead)
        {
            try
            {
                ADOX.CatalogClass cat = new ADOX.CatalogClass();
                string sAccessConnection
                    = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath;
                ADODB.Connection cn = new ADODB.Connection();
                cn.Open(sAccessConnection, null, null, -1);
                cat.ActiveConnection = cn;

                //新建一个表
                ADOX.TableClass tbl = new ADOX.TableClass();
                tbl.ParentCatalog = cat;
                tbl.Name = tableName;

                int size = mdbHead.Count;
                for (int i = 0; i < size; i++)
                {
                    //增加一个文本字段
                    ADOX.ColumnClass col2 = new ADOX.ColumnClass();
                    col2.ParentCatalog = cat;
                    col2.Name = mdbHead[i].ToString();//列的名称
                    col2.Properties["Jet OLEDB:Allow Zero Length"].Value = false;
                    tbl.Columns.Append(col2, ADOX.DataTypeEnum.adVarWChar, 500);
                }
                cat.Tables.Append(tbl);   //这句把表加入数据库(非常重要)
                tbl = null;
                cat = null;
                cn.Close();
                return true;
            }
            catch { return false; }
        }

3.读取mdb内容（完全读取），例程如下：
本例程返回的是一个DataTable，如需其他格式可以自行转换。
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// 读取mdb数据   
public static DataTable ReadAllData(string tableName, string mdbPath,ref bool success)  
{  
    DataTable dt = new DataTable();  
    try 
    {  
        DataRow dr;  
        //1、建立连接   
        string strConn  
            = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath + ";Jet OLEDB:Database Password=haoren";  
        OleDbConnection odcConnection = new OleDbConnection(strConn);  
        //2、打开连接   
        odcConnection.Open();  
        //建立SQL查询   
        OleDbCommand odCommand = odcConnection.CreateCommand();  
        //3、输入查询语句   
        odCommand.CommandText = "select * from " + tableName;  
        //建立读取   
        OleDbDataReader odrReader = odCommand.ExecuteReader();  
        //查询并显示数据   
        int size = odrReader.FieldCount;  
        for (int i = 0; i < size; i++)  
        {  
            DataColumn dc;  
            dc = new DataColumn(odrReader.GetName(i));  
            dt.Columns.Add(dc);  
        }  
        while (odrReader.Read())  
        {  
            dr = dt.NewRow();  
            for (int i = 0; i < size; i++)  
            {  
                dr[odrReader.GetName(i)] = odrReader[odrReader.GetName(i)].ToString();  
            }  
            dt.Rows.Add(dr);  
        }  
        //关闭连接   
        odrReader.Close();  
        odcConnection.Close();  
        success = true;  
        return dt;  
    }  
    catch 
    {  
        success = false;  
        return dt;  
    }  
} 
        // 读取mdb数据
        public static DataTable ReadAllData(string tableName, string mdbPath,ref bool success)
        {
            DataTable dt = new DataTable();
            try
            {
                DataRow dr;
                //1、建立连接
                string strConn
                    = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath + ";Jet OLEDB:Database Password=haoren";
                OleDbConnection odcConnection = new OleDbConnection(strConn);
                //2、打开连接
                odcConnection.Open();
                //建立SQL查询
                OleDbCommand odCommand = odcConnection.CreateCommand();
                //3、输入查询语句
                odCommand.CommandText = "select * from " + tableName;
                //建立读取
                OleDbDataReader odrReader = odCommand.ExecuteReader();
                //查询并显示数据
                int size = odrReader.FieldCount;
                for (int i = 0; i < size; i++)
                {
                    DataColumn dc;
                    dc = new DataColumn(odrReader.GetName(i));
                    dt.Columns.Add(dc);
                }
                while (odrReader.Read())
                {
                    dr = dt.NewRow();
                    for (int i = 0; i < size; i++)
                    {
                        dr[odrReader.GetName(i)] = odrReader[odrReader.GetName(i)].ToString();
                    }
                    dt.Rows.Add(dr);
                }
                //关闭连接
                odrReader.Close();
                odcConnection.Close();
                success = true;
                return dt;
            }
            catch
            {
                success = false;
                return dt;
            }
        }

4.读取mdb内容（按列读取），例程如下：
columns数组存储的是你要查询的列名称（必须确保mdb表中存在你要的列）

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// 读取mdb数据   
public static DataTable ReadDataByColumns(string mdbPaht,string tableName, string[] columns, ref bool success)  
{  
    DataTable dt = new DataTable();  
    try 
    {  
        DataRow dr;  
        //1、建立连接   
        string strConn  
            = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath + ";Jet OLEDB:Database Password=haoren";  
        OleDbConnection odcConnection = new OleDbConnection(strConn);  
        //2、打开连接   
        odcConnection.Open();  
        //建立SQL查询   
        OleDbCommand odCommand = odcConnection.CreateCommand();  
        //3、输入查询语句   
        string strColumn = "";  
        for (int i = 0; i < columns.Length; i++)  
        {  
            strColumn += columns[i].ToString() + ",";  
        }  
        strColumn = strColumn.TrimEnd(',');  
        odCommand.CommandText = "select "+strColumn+" from " + tableName;  
        //建立读取   
        OleDbDataReader odrReader = odCommand.ExecuteReader();  
        //查询并显示数据   
        int size = odrReader.FieldCount;  
        for (int i = 0; i < size; i++)  
        {  
            DataColumn dc;  
            dc = new DataColumn(odrReader.GetName(i));  
            dt.Columns.Add(dc);  
        }  
 
        while (odrReader.Read())  
        {  
            dr = dt.NewRow();  
            for (int i = 0; i < size; i++)  
            {  
                dr[odrReader.GetName(i)] = odrReader[odrReader.GetName(i)].ToString();  
            }  
            dt.Rows.Add(dr);  
        }  
        //关闭连接   
        odrReader.Close();  
        odcConnection.Close();  
        success = true;  
        return dt;  
    }  
    catch 
    {  
        success = false;  
        return dt;  
    }  
} 
        // 读取mdb数据
        public static DataTable ReadDataByColumns(string mdbPaht,string tableName, string[] columns, ref bool success)
        {
            DataTable dt = new DataTable();
            try
            {
                DataRow dr;
                //1、建立连接
                string strConn
                    = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath + ";Jet OLEDB:Database Password=haoren";
                OleDbConnection odcConnection = new OleDbConnection(strConn);
                //2、打开连接
                odcConnection.Open();
                //建立SQL查询
                OleDbCommand odCommand = odcConnection.CreateCommand();
                //3、输入查询语句
                string strColumn = "";
                for (int i = 0; i < columns.Length; i++)
                {
                    strColumn += columns[i].ToString() + ",";
                }
                strColumn = strColumn.TrimEnd(',');
                odCommand.CommandText = "select "+strColumn+" from " + tableName;
                //建立读取
                OleDbDataReader odrReader = odCommand.ExecuteReader();
                //查询并显示数据
                int size = odrReader.FieldCount;
                for (int i = 0; i < size; i++)
                {
                    DataColumn dc;
                    dc = new DataColumn(odrReader.GetName(i));
                    dt.Columns.Add(dc);
                }

                while (odrReader.Read())
                {
                    dr = dt.NewRow();
                    for (int i = 0; i < size; i++)
                    {
                        dr[odrReader.GetName(i)] = odrReader[odrReader.GetName(i)].ToString();
                    }
                    dt.Rows.Add(dr);
                }
                //关闭连接
                odrReader.Close();
                odcConnection.Close();
                success = true;
                return dt;
            }
            catch
            {
                success = false;
                return dt;
            }
        }
 

今天就简单写到这里，以后我会将内容补充完整。

补充一句：转载的朋友请一定注明出处谢谢！半支烟阿杰 http://blog.csdn.net/gisfarmer/