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  • SqlHelper.cs

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Data;
    using System.Data.SqlClient;
    using System.Configuration;

    namespace WebApplication1
    {
    public class SqlHelper
    {
    private static readonly string connString = ConfigurationManager.ConnectionStrings["connStr"].ConnectionString;
    public static int ExecuteNonQuery(string sql,params SqlParameter[] parameters )
    {
    using (SqlConnection conn = new SqlConnection(connString))
    {
    conn.Open();
    using (SqlCommand cmd = new SqlCommand(sql, conn))
    {
    cmd.Parameters.AddRange(parameters);
    return cmd.ExecuteNonQuery();
    }
    }
    }
    public static object ExecuteScalar(string sql, params SqlParameter[] parameters)
    {
    using (SqlConnection conn = new SqlConnection(connString))
    {
    conn.Open();
    using (SqlCommand cmd = new SqlCommand(sql, conn))
    {
    cmd.Parameters.AddRange(parameters);
    return cmd.ExecuteScalar();
    }
    }
    }
    public static DataTable ExecuteDataTable(string sql, params SqlParameter[] parameters)
    {
    DataSet set = new DataSet();
    using (SqlConnection conn = new SqlConnection(connString))
    {
    conn.Open();
    using (SqlCommand cmd = new SqlCommand(sql, conn))
    {
    if (parameters!=null)
    {
    cmd.Parameters.AddRange(parameters);
    }
    SqlDataAdapter adapter = new SqlDataAdapter(cmd);
    adapter.Fill(set);
    return set.Tables[0];
    }
    }
    }
    }
    }

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  • 原文地址:https://www.cnblogs.com/liyiyong/p/6859920.html
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