StudentDeletePage.aspx.cs

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data;
using System.Data.SqlClient;

namespace WebProject
{
  public partial class StudentDeletePage : System.Web.UI.Page
  {
    protected void Page_Load(object sender, EventArgs e)
    {

      string studentIdString = Request["StudentId"];

      string connectionString = "server=localhost;DataBase=CourseDatabase;uid=sa;pwd=godoro";
      SqlConnection connection = new SqlConnection(connectionString);
      connection.Open();

      String sql = "delete from Student where StudentId=" + studentIdString;

      SqlCommand command = new SqlCommand(sql, connection);
      int affectedRowCount = command.ExecuteNonQuery();
     
      if (affectedRowCount >= 0) {
        MessageLabel.Text = "Öğrenci başarıyla silinmiştir";
      } else {
        MessageLabel.Text = "Öğrenci silerken hata oluştu";
      } 

      connection.Close();

    }

    protected void CancelButton_Click(object sender, EventArgs e)
    {
      Response.Redirect("Default.aspx");
    }
  }
}