C#完成較為適用的SQLhelper。本站提示廣大學習愛好者:(C#完成較為適用的SQLhelper)文章只能為提供參考,不一定能成為您想要的結果。以下是C#完成較為適用的SQLhelper正文
第一次寫博客,想不到寫什麼好b( ̄▽ ̄)d ,思索的半天決議從sqlhelper開端,sqlhelper對順序員來說好像helloworld一樣,很復雜卻又很重要,helloworld代表著順序員萌新第一次寫代碼,而sqlhelper則是初次接觸數據庫(不知道這種說法對不對)。
好了不廢話了,上面直接上代碼(無話可說了):
public class SQLHelper { // 超時時間 private static int Timeout = 1000; // 數據庫稱號 public const String BestNet = "BestNet"; //存儲進程稱號 public const String UserInfoCURD = "UserInfoCURD"; // 數據庫銜接字符串 private static Dictionary<String, String> ConnStrs = new Dictionary<String, String>(); /// <summary> /// SQLServer操作類(靜態結構函數) /// </summary> static SQLHelper() { ConnectionStringSettingsCollection configs = WebConfigurationManager.ConnectionStrings; foreach (ConnectionStringSettings config in configs) { ConnStrs.Add(config.Name, config.ConnectionString); } } /// <summary> /// 獲取數據庫銜接 /// </summary> /// <param name="database">數據庫(配置文件內connectionStrings的name)</param> /// <returns>數據庫銜接</returns> private static SqlConnection GetConnection(string database) { if (string.IsNullOrEmpty(database)) { throw new Exception("未設置參數:database"); } if (!ConnStrs.ContainsKey(database)) { throw new Exception("未找到數據庫:" + database); } return new SqlConnection(ConnStrs[database]); } /// <summary> /// 獲取SqlCommand /// </summary> /// <param name="conn">SqlConnection</param> /// <param name="transaction">SqlTransaction</param> /// <param name="cmdType">CommandType</param> /// <param name="sql">SQL</param> /// <param name="parms">SqlParameter數組</param> /// <returns></returns> private static SqlCommand GetCommand(SqlConnection conn, SqlTransaction transaction, CommandType cmdType, string sql, SqlParameter[] parms) { SqlCommand cmd = new SqlCommand(sql, conn); cmd.CommandType = cmdType; cmd.CommandTimeout = Timeout; if (transaction != null) cmd.Transaction = transaction; if (parms != null && parms.Length != 0) cmd.Parameters.AddRange(parms); return cmd; } /// <summary> /// 查詢數據,前往DataTable /// </summary> /// <param name="database">數據庫</param> /// <param name="sql">SQL語句或存儲進程名</param> /// <param name="parms">參數</param> /// <param name="cmdType">查詢類型(SQL語句/存儲進程名)</param> /// <returns>DataTable</returns> public static DataTable QueryDataTable(string database, string sql, SqlParameter[] parms, CommandType cmdType) { if (string.IsNullOrEmpty(database)) { throw new Exception("未設置參數:database"); } if (string.IsNullOrEmpty(sql)) { throw new Exception("未設置參數:sql"); } try { using (SqlConnection conn = GetConnection(database)) { conn.Open(); using (SqlCommand cmd = GetCommand(conn, null, cmdType, sql, parms)) { using (SqlDataAdapter da = new SqlDataAdapter(cmd)) { DataTable dt = new DataTable(); da.Fill(dt); return dt; } } } } catch (SqlException ex) { System.Text.StringBuilder log = new System.Text.StringBuilder(); log.Append("查詢數據出錯:"); log.Append(ex); throw new Exception(log.ToString()); } } /// <summary> /// 查詢數據,前往DataSet /// </summary> /// <param name="database">數據庫</param> /// <param name="sql">SQL語句或存儲進程名</param> /// <param name="parms">參數</param> /// <param name="cmdType">查詢類型(SQL語句/存儲進程名)</param> /// <returns>DataSet</returns> public static DataSet QueryDataSet(string database, string sql, SqlParameter[] parms, CommandType cmdType) { if (string.IsNullOrEmpty(database)) { throw new Exception("未設置參數:database"); } if (string.IsNullOrEmpty(sql)) { throw new Exception("未設置參數:sql"); } try { using (SqlConnection conn = GetConnection(database)) { conn.Open(); using (SqlCommand cmd = GetCommand(conn, null, cmdType, sql, parms)) { using (SqlDataAdapter da = new SqlDataAdapter(cmd)) { DataSet ds = new DataSet(); da.Fill(ds); return ds; } } } } catch (SqlException ex) { System.Text.StringBuilder log = new System.Text.StringBuilder(); log.Append("查詢數據出錯:"); log.Append(ex); throw new Exception(log.ToString()); } } /// <summary> /// 執行命令獲取獨一值(第一行第一列) /// </summary> /// <param name="database">數據庫</param> /// <param name="sql">SQL語句或存儲進程名</param> /// <param name="parms">參數</param> /// <param name="cmdType">查詢類型(SQL語句/存儲進程名)</param> /// <returns>獲取值</returns> public static object QueryScalar(string database, string sql, SqlParameter[] parms, CommandType cmdType) { if (string.IsNullOrEmpty(database)) { throw new Exception("未設置參數:database"); } if (string.IsNullOrEmpty(sql)) { throw new Exception("未設置參數:sql"); } try { using (SqlConnection conn = GetConnection(database)) { conn.Open(); using (SqlCommand cmd = GetCommand(conn, null, cmdType, sql, parms)) { return cmd.ExecuteScalar(); } } } catch (SqlException ex) { System.Text.StringBuilder log = new System.Text.StringBuilder(); log.Append("處置出錯:"); log.Append(ex); throw new Exception(log.ToString()); } } /// <summary> /// 執行命令更新數據 /// </summary> /// <param name="database">數據庫</param> /// <param name="sql">SQL語句或存儲進程名</param> /// <param name="parms">參數</param> /// <param name="cmdType">查詢類型(SQL語句/存儲進程名)</param> /// <returns>更新的行數</returns> public static int Execute(string database, string sql, SqlParameter[] parms, CommandType cmdType) { if (string.IsNullOrEmpty(database)) { throw new Exception("未設置參數:database"); } if (string.IsNullOrEmpty(sql)) { throw new Exception("未設置參數:sql"); } //前往(增刪改)的更新行數 int count = 0; try { using (SqlConnection conn = GetConnection(database)) { conn.Open(); using (SqlCommand cmd = GetCommand(conn, null, cmdType, sql, parms)) { if (cmdType == CommandType.StoredProcedure) cmd.Parameters.AddWithValue("@RETURN_VALUE", "").Direction = ParameterDirection.ReturnValue; count = cmd.ExecuteNonQuery(); if (count <= 0) if (cmdType == CommandType.StoredProcedure) count = (int)cmd.Parameters["@RETURN_VALUE"].Value; } } } catch (SqlException ex) { System.Text.StringBuilder log = new System.Text.StringBuilder(); log.Append("處置出錯:"); log.Append(ex); throw new Exception(log.ToString()); } return count; } /// <summary> /// 查詢數據,前往DataTable /// </summary> /// <param name="database">數據庫</param> /// <param name="sql">SQL語句或存儲進程名</param> /// <param name="cmdType">查詢類型(SQL語句/存儲進程名)</param> /// <param name="values">參數</param> /// <returns>DataTable</returns> public static DataTable QueryDataTable(string database, string sql, CommandType cmdType, IDictionary<string, object> values) { SqlParameter[] parms = DicToParams(values); return QueryDataTable(database, sql, parms, cmdType); } /// <summary> /// 執行存儲進程查詢數據,前往DataSet /// </summary> /// <param name="database">數據庫</param> /// <param name="sql">SQL語句或存儲進程名</param> /// <param name="cmdType">查詢類型(SQL語句/存儲進程名)</param> /// <param name="values">參數 /// <returns>DataSet</returns> public static DataSet QueryDataSet(string database, string sql, CommandType cmdType, IDictionary<string, object> values) { SqlParameter[] parms = DicToParams(values); return QueryDataSet(database, sql, parms, cmdType); } /// <summary> /// 執行命令獲取獨一值(第一行第一列) /// </summary> /// <param name="database">數據庫</param> /// <param name="sql">SQL語句或存儲進程名</param> /// <param name="cmdType">查詢類型(SQL語句/存儲進程名)</param> /// <param name="values">參數</param> /// <returns>獨一值</returns> public static object QueryScalar(string database, string sql, CommandType cmdType, IDictionary<string, object> values) { SqlParameter[] parms = DicToParams(values); return QueryScalar(database, sql, parms, cmdType); } /// <summary> /// 執行命令更新數據 /// </summary> /// <param name="database">數據庫</param> /// <param name="sql">SQL語句或存儲進程名</param> /// <param name="cmdType">查詢類型(SQL語句/存儲進程名)</param> /// <param name="values">參數</param> /// <returns>更新的行數</returns> public static int Execute(string database, string sql, CommandType cmdType, IDictionary<string, object> values) { SqlParameter[] parms = DicToParams(values); return Execute(database, sql, parms, cmdType); } /// <summary> /// 創立參數 /// </summary> /// <param name="name">參數名</param> /// <param name="type">參數類型</param> /// <param name="size">參數大小</param> /// <param name="direction">參數方向(輸出/輸入)</param> /// <param name="value">參數值</param> /// <returns>新參數對象</returns> public static SqlParameter[] DicToParams(IDictionary<string, object> values) { if (values == null) return null; SqlParameter[] parms = new SqlParameter[values.Count]; int index = 0; foreach (KeyValuePair<string, object> kv in values) { SqlParameter parm = null; if (kv.Value == null) { parm = new SqlParameter(kv.Key, DBNull.Value); } else { Type t = kv.Value.GetType(); parm = new SqlParameter(kv.Key, NetToSql(kv.Value.GetType())); parm.Value = kv.Value; } parms[index++] = parm; } return parms; } /// <summary> /// .net類型轉換為Sql類型 /// </summary> /// <param name="t">.net類型</param> /// <returns>Sql類型</returns> public static SqlDbType NetToSql(Type t) { SqlDbType dbType = SqlDbType.Variant; switch (t.Name) { case "Int16": dbType = SqlDbType.SmallInt; break; case "Int32": dbType = SqlDbType.Int; break; case "Int64": dbType = SqlDbType.BigInt; break; case "Single": dbType = SqlDbType.Real; break; case "Decimal": dbType = SqlDbType.Decimal; break; case "Byte[]": dbType = SqlDbType.VarBinary; break; case "Boolean": dbType = SqlDbType.Bit; break; case "String": dbType = SqlDbType.NVarChar; break; case "Char[]": dbType = SqlDbType.Char; break; case "DateTime": dbType = SqlDbType.DateTime; break; case "DateTime2": dbType = SqlDbType.DateTime2; break; case "DateTimeOffset": dbType = SqlDbType.DateTimeOffset; break; case "TimeSpan": dbType = SqlDbType.Time; break; case "Guid": dbType = SqlDbType.UniqueIdentifier; break; case "Xml": dbType = SqlDbType.Xml; break; case "Object": dbType = SqlDbType.Variant; break; } return dbType; } }
可以直接這樣調用:
IDictionary<string, object> values = new Dictionary<string, object>(); values.Add("@UserName", UserName); values.Add("@PassWord", passWord); object Scalar = SQLHelper.QueryScalar(SQLHelper.BestNet, SQLHelper.UserInfoCURD, CommandType.StoredProcedure, values);
以上就是本文的全部內容,希望對大家的學習有所協助,也希望大家多多支持。