如何执行sqlconnection和sqlcommand？

Question

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Data.SqlClient; 
using System.Windows.Forms; 
using System.Data; 

namespace FileName 
{ 
    class Database 
    { 
     public SqlConnection connection; 
     public SqlCommand command; 

     public string connString = @"Data Source=KAT;Initial Catalog=dbFileDirectory2;Integrated Security=True"; 

     private bool open() 
     { 
      try 
      { 
       connection = new SqlConnection(connString); 
       connection.Open(); 
       return true; 
      } 
      catch (SqlException e) 
      { 
       return false; 
      } 
     } 

     private void close() 
     { 
      try 
      { 
       connection.Close(); 
      } 
      catch (SqlException e) 
      { 

      } 
     } 

     public bool testConnection() 
     { 
      if (open()) 
       return true; 
      else 
       return false; 
     } 


     public bool select(string query) 
     { 
      if (execute(query)) 
       return true; 
      else 
       return false; 

     } 

     public bool insert(string query) 
     { 
      if (execute(query)) 
       return true; 
      else 
       return false; 
     } 

     public bool update(string query) 
     { 
      if (execute(query)) 
       return true; 
      else 
       return false; 
     } 

     public bool delete(string query) 
     { 
      if (execute(query)) 
       return true; 
      else 
       return false; 

     } 

     public DataTable read(string query) 
     { 
      DataTable table; 
      SqlDataAdapter adapter; 
      try 
      { 
       open(); 
       adapter = new SqlDataAdapter(query, connection); 
       table = new DataTable(); 
       adapter.Fill(table); 
       return table; 
      } 
      catch (Exception e) 
      { 
       MessageBox.Show(e.Message); return null; 
      } 
      finally 
      { 
       close(); 
      } 
     } 

     private bool execute(string query) 
     { 
      try 
      { 
       open(); 
       command = new SqlCommand(query, connection); 
       command.ExecuteNonQuery(); 
       return true; 
      } 
      catch (SqlException e) 
      { 
       //MessageBox.Show(e.ToString()); 
       return false; 
      } 
      finally 
      { 
       close(); 
      } 
     } 


    //using (SqlConnection con = new SqlConnection(db.connString)) 
    //     { 
    //      using (SqlCommand cmd = new SqlCommand("addFile", con)) 
    //      { 
    //       cmd.CommandType = CommandType.StoredProcedure; 
    //       cmd.Parameters.AddWithValue("@File", c.File); 
    //       cmd.Parameters.AddWithValue("@Cabinet", c.Cabinet); 
    //       cmd.Parameters.AddWithValue("@Drawer", c.Drawer); 
    //       cmd.Parameters.AddWithValue("@Envelope", c.Envelope); 
    //       cmd.Parameters.AddWithValue("@Page", c.Page); 
    //       cmd.Parameters.AddWithValue("@Name", "New"); 
    //       cmd.Parameters.AddWithValue("@Status", "IN"); 
    //       cmd.Parameters.AddWithValue("@Date", DateTime.Now); 
    //       con.Open(); 
    //       cmd.ExecuteNonQuery(); 
    //       MessageBox.Show("Save Successful", "Notification"); 
    //       return true; 

    //      } 


    //     } 


        } 
     } 

how to execute sqlconnection and sqlcommand? 

如何在不使用cmd.parameters的情况下调用sp？ sqlconnection/sqlcommand通过2 DB绑定方法 如何读取行？ 现在是时候再次为下一个Stack Overflow版主投票。初选已经刚刚结束，前十名考生可...

Answer 1

private string name = ""; 

public string Name 
{ 
    get{ return name; } 
    set{ name = value; } 
} 

Answer 2

cboCabinet.Items.Insert(0, ""); 
      DataTable cabinetList = LI.listCabinet(); 
      for (int x = 0; x < cabinetList.Rows.Count; x++) 
      { 
       cboCabinet.Items.Add(cabinetList.Rows[x]["Cabinet"]); 
      } 
      List<object> list = new List<object>(); 
      foreach (object o in cboCabinet.Items) 
      { 
       if (!list.Contains(o)) 
       { 
        list.Add(o); 
       } 
      } 
      cboCabinet.Items.Clear(); 
      cboCabinet.Items.AddRange(list.ToArray());