C#使用SQL Dataset数据集代码实例

namespace DataSetDemo
{
  class Program
  {
    static void Main(string[] args)
    {
      //创建DataSet对象
      DataSet myds = new DataSet("mycsharp");
      DataTable mydt = new DataTable("mytable01");
      myds.Tables.Add(mydt);  //添加
      //声明三个列
      DataColumn mydcol1 = new DataColumn("id",Type.GetType("System.Int32"));
      DataColumn mydcol2 = new DataColumn("name", Type.GetType("System.String"));
      DataColumn mydcol3 = new DataColumn("department", Type.GetType("System.String"));
      //添加定义好的列
      mydt.Columns.Add(mydcol1);
      mydt.Columns.Add(mydcol2);
      mydt.Columns.Add(mydcol3);
      //输入数据
      string[,] mystr= { { "张三","开发部" }, { "李四","技术部" }, { "王五","网络部" }, { "赵六","人事部" } };
      for (int i=0; i< mystr.Length/2;i++)
      {
        DataRow myrow = mydt.NewRow();  //增加新的行
        myrow[0] = i;
        myrow["name"] = mystr[i, 0];
        myrow[2] = mystr[i, 1];
        mydt.Rows.Add(myrow);
      }
      myds.AcceptChanges();  //保存
    }
  }
}

namespace DataSetDemo
{
  class Program
  {
    static void Main(string[] args)
    {
      //创建DataSet对象
      DataSet myds = new DataSet("mycsharp");
      DataTable mydt = new DataTable("mytable01");
      myds.Tables.Add(mydt);  //添加
      //声明三个列
      DataColumn mydcol1 = new DataColumn("id",Type.GetType("System.Int32"));
      DataColumn mydcol2 = new DataColumn("name", Type.GetType("System.String"));
      DataColumn mydcol3 = new DataColumn("department", Type.GetType("System.String"));
      //添加定义好的列
      mydt.Columns.Add(mydcol1);
      mydt.Columns.Add(mydcol2);
      mydt.Columns.Add(mydcol3);
      //输入数据
      string[,] mystr= { { "张三","开发部" }, { "李四","技术部" }, { "王五","网络部" }, { "赵六","人事部" } };
      for (int i=0; i< mystr.Length/2;i++)
      {
        DataRow myrow = mydt.NewRow();  //增加新的行
        myrow[0] = i+1;   
        myrow["name"] = mystr[i, 0];  //使用字符串
        myrow[2] = mystr[i, 1];
        mydt.Rows.Add(myrow);
      }
      myds.AcceptChanges();  //保存
      Console.WriteLine("更改前的数据");
      outValues(myds);  //调用遍历方法
      //创建第二个表
      DataTable mydt02 = mydt.Clone();
      DataRow mydr02 = mydt02.NewRow();
      mydt02.Rows.Add(new Object[] { 5,"Czhenya","开发部"});
      mydt02.Rows.Add(new Object[] { 5, "陈九", "开发部" });
      //------合并两个表------
      myds.Merge(mydt02);  //将其架构合并到myds中
      Console.WriteLine("-----合并后的表-----");
      outValues(myds);
      //------复制--------
      DataSet myds01 = myds.Copy();
      DataSet myds02 = myds.Clone();
      Console.WriteLine("COPY的结果");
      outValues(myds01);  //完全复制
      Console.WriteLine("Clone的结果");
      outValues(myds02);  //克隆出框架，不复制数据
      Console.Read();  
    }
    /// <summary>
    /// 实现遍历dataset
    /// </summary>
    /// <param name="ds">DataSet名称</param>
    public static void outValues(DataSet ds)  
    {
      foreach (DataTable outtable in ds.Tables)
      {
        Console.WriteLine("表名称："+ outtable.TableName);
        foreach (DataRow outdr in outtable.Rows)
        {
          foreach (DataColumn ourdcol in outtable.Columns)
          {
            Console.Write(outdr[ourdcol] + "\t");
            Console.WriteLine();
          }
        }
      }
    }
  }
}