用ado.net进行分布式程序设计更新数据库（学习笔记）

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提供一个数据服务类，调用GetDataSet就得到需要的DataSet,然后在用户界面进行修改，最后调用SaveDate就可以把未定的更改保存到数据库。
using System;
using System.Data ;
using System.Data.SqlClient ;

namespace AsterDnet.DataBind
{
    /// <summary>
    /// Summary description for GetData.
    /// </summary>
    public class TestData
    {
        private SqlDataAdapter da;
        public TestData()
        {
            //
            // TODO: Add constructor logic here
            //
        }
        public  DataSet GetDataSet()
        {

            string strConn="data source=ASTERDnet;initial catalog=Test;integrated security=SSPI;persist security info=False;user id=sa;workstation id=ASTERDnet;packet size=4096";
            SqlConnection conn=new SqlConnection(strConn);
            conn.Open();
            DataSet ds=new DataSet();

            SqlParameter workParam=new  SqlParameter();
            da=new SqlDataAdapter();
            //Build the select Command
            da.SelectCommand =new SqlCommand("select * from Education ",conn);
            da.Fill(ds,"Education");


            // Build the insert Command
            da.InsertCommand = new SqlCommand("Insert into Education (ID, Education) VALUES (@ID, @Education)", conn);

            workParam = da.InsertCommand.Parameters.Add("@ID", SqlDbType.Int);
            workParam.SourceColumn = "ID";
            workParam.SourceVersion = DataRowVersion.Current;

            workParam = da.InsertCommand.Parameters.Add("@Education", SqlDbType.NChar, 50);
            workParam.SourceVersion = DataRowVersion.Current;
            workParam.SourceColumn = "Education";

            // Build the update command
            da.UpdateCommand = new SqlCommand("Update Education Set Education = @Education WHERE ID = @ID" , conn);

            workParam = da.UpdateCommand.Parameters.Add("@ID", SqlDbType.Int);
            workParam.SourceColumn = "ID";
            workParam.SourceVersion = DataRowVersion.Original;

            workParam = da.UpdateCommand.Parameters.Add("@Education", SqlDbType.NChar, 50);
            workParam.SourceVersion = DataRowVersion.Current;
            workParam.SourceColumn = "Education";

            //Build the delete command
            da.DeleteCommand =new SqlCommand("delete from Education where id=@ID",conn);
            workParam=da.DeleteCommand.Parameters.Add("@ID",SqlDbType.Int );
            workParam.SourceColumn ="ID";
            workParam.SourceVersion =DataRowVersion.Original;

            return ds;
        }
        //save the change dataset
        public void SaveDate(DataSet dataSet,string tableName)
        {
            da.Update(dataSet,tableName);
        }

    }
}

例中我建立了一个Test的数据库，数据库中建立一个Education的表，表中建立了两个字段ID（int），Education（char），在rc3中通过。

感觉没有vb6.0用ado2.5中那么方便（只要设置ActiveConnection,然后update就一切搞定，现在要自己写如何更新的SqlCommand)，不过程序员的控制能力要强一些了。

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