WELOA.DAL/WEL/ls_postDAO.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
using WELOA.Model;

namespace LSDAL_SQL
{
public class ls_postDAO
{
    
    private ls_exception exlog = new ls_exception();
    private Polytechnic trinfo = new Polytechnic();

    
    public Polytechnic delpost(string strPost)
    {
        this.trinfo.rowsnum = -1;
        this.trinfo.nException = -1;
        using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["lsstring"].ConnectionString))
        {
            SqlCommand command = connection.CreateCommand();
            command.CommandType = CommandType.Text;
            command.CommandText = "DELETE ls_post where post=@post";
            command.Parameters.AddWithValue("@post", strPost);
            try
            {
                if (connection.State == ConnectionState.Closed)
                {
                    connection.Open();
                }
                this.trinfo.rowsnum = command.ExecuteNonQuery();
            }
            catch (Exception exception)
            {
                this.exlog.insexception("ls_postDAO.cs delpost", exception.Message);
                this.trinfo.nException = 1;
                return this.trinfo;
            }
        }
        return this.trinfo;
    }

    public Polytechnic inspost(string strPost)
    {
        this.trinfo.rowsnum = -1;
        this.trinfo.nException = -1;
        using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["lsstring"].ConnectionString))
        {
            SqlCommand command = connection.CreateCommand();
            command.CommandType = CommandType.Text;
            command.CommandText = "INSERT INTO ls_post (post) VALUES (@post)";
            command.Parameters.AddWithValue("@post", strPost);
            try
            {
                if (connection.State == ConnectionState.Closed)
                {