添加/删除/修改数据库内容

在数据库存中插内容
private void Button1_Click(object sender, System.EventArgs e)
  {
   string b1;
   string b2;
   string b3;
   string b4;
   string b5;
   b1=this.TextBox1.Text;
   b2=this.TextBox2.Text;
   b3=this.TextBox3.Text;
   b4=this.TextBox4.Text;
   b5=this.TextBox5.Text;

   System.Data .SqlClient.SqlConnection bb=new System.Data.SqlClient.SqlConnection ("server=(local);database=Hotel;uid=sa;pwd=123");
   string  dd="INSERT INTO info(publicizer,[goods name],bewrite,price,issuance)VALUES('"+b1+"','"+b2+"','"+b3+"','"+b4+"','"+b5+"')";
   System.Data.SqlClient.SqlCommand ef=new System.Data.SqlClient.SqlCommand(dd,bb);
   ef.Connection.Open();
   ef.ExecuteNonQuery();

   Response.Redirect("test4.aspx");

  }

在页面建立列表,读出数据库中的内容
private void Page_Load(object sender, System.EventArgs e)
  {
   
   System.Data .SqlClient .SqlConnection cc=new System.Data.SqlClient.SqlConnection ("server=(local);database=Hotel;uid=sa;pwd=123");
   string tt="select * from info";
   System.Data .SqlClient.SqlDataAdapter abc=new System.Data.SqlClient.SqlDataAdapter(tt,cc);
   DataSet a12=new DataSet();
   abc.Fill (a12);
   this.DataGrid1.DataSource=a12;
   this.DataGrid1.DataBind();
  }

删除数据库的内容
private void Page_Load(object sender, System.EventArgs e)
  {
   string c = Request.QueryString["abc"];//获取abc的值

 

   System.Data .SqlClient .SqlConnection cc=new System.Data.SqlClient.SqlConnection("server=(local);database=hotel;uid=sa;pwd=123");   

   string qd="delete from enrol where id=" + c;

   System.Data .SqlClient.SqlCommand ef=new System.Data.SqlClient.SqlCommand(qd,cc);
   ef.Connection.Open ();
   ef.ExecuteNonQuery();

   Response.Redirect("test8.aspx"); //跳传页面

更新修改数据库内容
System.Data .SqlClient .SqlConnection cc=new System.Data.SqlClient.SqlConnection("server=(local);database=hotel;uid=sa;pwd=510823");
    string qd="update enrol set age=88 where work='工程师'";

   System.Data .SqlClient.SqlCommand ef=new System.Data.SqlClient.SqlCommand(qd,cc);
   ef.Connection.Open ();
   ef.ExecuteNonQuery();
   Response .Redirect ("test8.aspx");