C# sqlhelper
public class SqlHelper { private static Logger logger = new Logger(typeof(SqlHelper)); private static string ConnStr = ConfigurationManager.ConnectionStrings["mvc5"].ConnectionString; public static void ExecuteNonQuery(string sql) { //try //{ using (SqlConnection sqlConn = new SqlConnection(ConnStr)) { sqlConn.Open(); SqlCommand cmd = new SqlCommand(sql, sqlConn); cmd.ExecuteNonQuery();//.ExecuteNonQueryAsync();// } //} //catch (Exception ex) //{ //} //finally //{ //} } public static List<T> QueryList<T>(string sql) where T : new() { using (SqlConnection sqlConn = new SqlConnection(ConnStr)) { sqlConn.Open(); SqlCommand cmd = new SqlCommand(sql, sqlConn); cmd.CommandTimeout = 120; return TransList<T>(cmd.ExecuteReader()); } } public static void Insert<T>(T model, string tableName) where T : new() { string sql = GetInsertSql<T>(model, tableName); ExecuteNonQuery(sql); } public static void InsertList<T>(List<T> list, string tableName) where T : new() { string sql = string.Join(" ", list.Select(t => GetInsertSql<T>(t, tableName))); ExecuteNonQuery(sql); } #region Private private static string GetInsertSql<T>(T model, string tableName) { StringBuilder sbSql = new StringBuilder(); StringBuilder sbFields = new StringBuilder(); StringBuilder sbValues = new StringBuilder(); Type type = model.GetType(); var properties = type.GetProperties(); foreach (PropertyInfo p in properties) { string name = p.Name; if (!name.Equals("id", StringComparison.OrdinalIgnoreCase)) { sbFields.AppendFormat("[{0}],", name); sbValues.AppendFormat("'{0}',", p.GetValue(model)); } } sbSql.AppendFormat("INSERT INTO {0} ({1}) VALUES ({2});",tableName, sbFields.ToString().TrimEnd(','), sbValues.ToString().TrimEnd(',')); return sbSql.ToString(); } private static List<T> TransList<T>(SqlDataReader reader) where T : new() { List<T> tList = new List<T>(); Type type = typeof(T); var properties = type.GetProperties(); if (reader.Read()) { do { T t = new T(); foreach (PropertyInfo p in properties) { p.SetValue(t, Convert.ChangeType(reader[p.Name], p.PropertyType)); } tList.Add(t); } while (reader.Read()); } return tList; } private static T TransModel<T>(SqlDataReader reader) where T : new() { T t = new T(); if (reader.Read()) { do { Type type = typeof(T); var properties = type.GetProperties(); foreach (PropertyInfo p in properties) { p.SetValue(t, Convert.ChangeType(reader[p.Name], p.PropertyType)); } } while (reader.Read()); } return t; } #endregion Private }
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本文来自博客园,作者:明志德道,转载请注明原文链接:https://www.cnblogs.com/for-easy-fast/articles/12520052.html
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