ADO.NET 第三课 DataSet (一)

 

代码

   
     

    
      
    
      using
    
      (SqlConnection conn
    
      =
    
      new
    
       SqlConnection)
{
conn.ConnectionString
    
      =
    
      "
    
      ...
    
      "
    
      ;
conn.Open();
DataSet ds
    
      =
    
      new
    
       DataSet();
DataTable dt
    
      =
    
      new
    
       DataTable(
    
      "
    
      student
    
      "
    
      );
DataColumn dc1
    
      =
    
      new
    
       DataColumn(
    
      "
    
      s_id
    
      "
    
      ,
    
      typeof
    
      (
    
      int
    
      ));
DataColumn dc2
    
      =
    
      new
    
       DataColumn(
    
      "
    
      s_name
    
      "
    
      ,
    
      typeof
    
      (
    
      string
    
      ));
dt,Columns.add(dc1);
dt.Columns.add(dc2);
ds.Tables.add(dt);
DataRow dr
    
      =
    
      dt.NewRow();
dr[
    
      "
    
      s_id
    
      "
    
      ]
    
      =
    
      1
    
      ;
dr[
    
      "
    
      s_name
    
      "
    
      ]
    
      =
    
      "
    
      金凤蝶
    
      "
    
      ;
dt.Rows.add(dr);

    
      foreach
    
      (DataRow dr1 
    
      in
    
       ds.Table[
    
      0
    
      ].Rows)
{
MessageBox.Show(dr1[
    
      "
    
      s_id
    
      "
    
      ]
    
      +
    
      "
    
      : 
    
      "
    
      +
    
      dr1[
    
      "
    
      s_name
    
      "
    
      ]);
}

    
      this
    
      .TextBox1.DataBindings.add(
    
      "
    
      Text
    
      "
    
      ,ds.Table[
    
      0
    
      ],
    
      "
    
      s_id
    
      "
    
      );
   
     
   
     

    
      this.DataGridView1.Columns.add("s_id","编号");
   
     
   
     

    
      this.DataGridView1.Columns.add("s_name","姓名");
   
     
   
     

    
      this.DataGridView1.Columns[0].DataPropertyName="s_id";
   
     
   
     

    
      this.DataGridView1.Columns[1].DataPropertyName="s_name";
   
     
   
     

    
       
    
      this.DataGridView1.DataSource=ds.Table[0];