103 lines
3.3 KiB
C#
103 lines
3.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Data;
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using System.Data.SqlClient;
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namespace Common
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{
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public static class SqlHelper
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{
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//连接字符串
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private static readonly string connStr = ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString;
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/// <summary>
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/// 1.执行增、删、改的方法：ExecuteNonQuery
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="pms"></param>
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/// <returns></returns>
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public static int ExecuteNonQuery(string sql, params SqlParameter[] pms)
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{
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using (SqlConnection con = new SqlConnection(connStr))
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{
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using (SqlCommand cmd = new SqlCommand(sql, con))
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{
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if (pms != null)
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{
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cmd.Parameters.AddRange(pms);
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}
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con.Open();
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return cmd.ExecuteNonQuery();
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}
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}
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}
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/// <summary>
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/// 2.封装一个执行返回单个对象的方法：ExecuteScalar()
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="pms"></param>
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/// <returns></returns>
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public static object ExecuteScalar(string sql, params SqlParameter[] pms)
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{
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using (SqlConnection con = new SqlConnection(connStr))
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{
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using (SqlCommand cmd = new SqlCommand(sql, con))
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{
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if (pms != null)
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{
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cmd.Parameters.AddRange(pms);
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}
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con.Open();
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return cmd.ExecuteScalar();
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}
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}
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}
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/// <summary>
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/// 3.执行查询多行多列的数据的方法：ExecuteReader
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="pms"></param>
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/// <returns></returns>
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public static SqlDataReader ExecuteReader(string sql, params SqlParameter[] pms)
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{
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SqlConnection con = new SqlConnection(connStr);
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using (SqlCommand cmd = new SqlCommand(sql, con))
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{
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if (pms != null)
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{
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cmd.Parameters.AddRange(pms);
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}
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try
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{
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con.Open();
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return cmd.ExecuteReader(CommandBehavior.CloseConnection);
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}
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catch (Exception)
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{
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con.Close();
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con.Dispose();
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throw;
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}
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}
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}
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/// <summary>
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/// 4.执行返回DataTable的方法
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="pms"></param>
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/// <returns></returns>
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public static DataTable ExecuteDataTable(string sql, params SqlParameter[] pms)
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{
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DataTable dt = new DataTable();
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using (SqlDataAdapter adapter = new SqlDataAdapter(sql, connStr))
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{
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if (pms != null)
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{
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adapter.SelectCommand.Parameters.AddRange(pms);
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}
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adapter.Fill(dt);
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}
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return dt;
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}
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}
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} |