ADO增删查改

Posted 2020-10-14

using System;
using System.Collections.Generic;
using System.Text;

using System.Data;
using System.Data.SqlClient;

namespace SQLDB
{
public class SqlHelper
{
/// <summary>
/// 执行数据库操作（增删改）
/// </summary>
/// <param name="constr">连接字符串</param>
/// <param name="cmdstr">操作字符串（增删改）</param>
/// <param name="ps">参数列表</param>
/// <returns>返回受影响行数</returns>
public static int ExecuteNonQuery(string constr,string cmdstr,params SqlParameter[] ps)
{
　　SqlConnection conn = new SqlConnection(constr);
　　SqlCommand cmd = new SqlCommand(cmdstr, conn);

　　if (ps != null)
　　{
　　　　cmd.Parameters.AddRange(ps);
　　}

　　conn.Open();
　　int i = cmd.ExecuteNonQuery();
　　conn.Close();

　　return i;
}

/// <summary>
/// 执行查询操作（需要手动读取）
/// </summary>
/// <param name="constr">连接语句</param>
/// <param name="cmdstr">执行语句</param>
/// <param name="ps">参数列表</param>
/// <returns>返回数据阅读器</returns>
public static SqlDataReader ExecuteDataReader(string constr,string cmdstr,params SqlParameter[] ps)
{
　　SqlConnection conn = new SqlConnection(constr);
　　SqlCommand cmd = new SqlCommand(cmdstr, conn);

　　if (ps != null)
　　{
　　cmd.Parameters.AddRange(ps);
}