using System;
using System.Collections.Generic;using System.Linq;using System.Text;using System.Data;using System.Data.SqlClient;namespace DAL
{ public class Field { // Disallow Construction private Field() { }// By Number
static public string GetString(SqlDataReader reader, int fldnum) { if (reader.IsDBNull(fldnum)) return string.Empty; return reader.GetString(fldnum).Trim(); }static public decimal GetDecimal(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) return decimal.MinValue; return reader.GetDecimal(fldnum); }static public int GetInt(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) //return int.MinValue; return 0; return reader.GetInt32(fldnum); }static public bool GetBoolean(SqlDataReader reader, int fldnum)
{ return (GetInt(reader, fldnum) > 0); }static public byte GetByte(SqlDataReader rec, int fldnum)
{ if (rec.IsDBNull(fldnum)) return 0; return rec.GetByte(fldnum); }static public DateTime GetDateTime(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) return DateTime.MinValue; return reader.GetDateTime(fldnum); }static public double GetDouble(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) return double.MinValue; return reader.GetDouble(fldnum); }static public float GetFloat(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) return float.MinValue; return reader.GetFloat(fldnum); }static public Guid GetGuid(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) return Guid.Empty; return reader.GetGuid(fldnum); }static public Int32 GetInt32(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) return int.MinValue; return reader.GetInt32(fldnum); }static public Int16 GetInt16(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) return Int16.MinValue; return reader.GetInt16(fldnum); }static public Int64 GetInt64(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) return Int64.MinValue; return reader.GetInt64(fldnum); }static public ulong GetUlong(SqlDataReader reader, int fldnum)
{ if (reader.IsDBNull(fldnum)) return ulong.MinValue; return ulong.Parse(reader[fldnum].ToString()); }
// By Name
static public string GetString(SqlDataReader reader, string fldname) { return GetString(reader, reader.GetOrdinal(fldname)); }static public decimal GetDecimal(SqlDataReader reader, string fldname)
{ return GetDecimal(reader, reader.GetOrdinal(fldname)); }static public int GetInt(SqlDataReader reader, string fldname)
{ return GetInt(reader, reader.GetOrdinal(fldname)); }static public bool GetBoolean(SqlDataReader reader, string fldname)
{ return GetBoolean(reader, reader.GetOrdinal(fldname)); }static public byte GetByte(SqlDataReader rec, string fldname)
{ return GetByte(rec, rec.GetOrdinal(fldname)); }static public DateTime GetDateTime(SqlDataReader reader,
string fldname) { return GetDateTime(reader, reader.GetOrdinal(fldname)); }static public double GetDouble(SqlDataReader reader, string fldname)
{ return GetDouble(reader, reader.GetOrdinal(fldname)); }static public float GetFloat(SqlDataReader reader, string fldname)
{ return GetFloat(reader, reader.GetOrdinal(fldname)); }static public Guid GetGuid(SqlDataReader reader, string fldname)
{ return GetGuid(reader, reader.GetOrdinal(fldname)); }static public Int32 GetInt32(SqlDataReader reader, string fldname)
{ return GetInt32(reader, reader.GetOrdinal(fldname)); }static public Int16 GetInt16(SqlDataReader reader, string fldname)
{ return GetInt16(reader, reader.GetOrdinal(fldname)); }static public Int64 GetInt64(SqlDataReader reader, string fldname)
{ return GetInt64(reader, reader.GetOrdinal(fldname)); } static public ulong GetUlong(SqlDataReader reader, string fldname) { return GetUlong(reader, reader.GetOrdinal(fldname)); } static public DateTime GetDateTime(DataRow dr, string fldname) { if (dr.IsNull(fldname)) return DateTime.MinValue; return Convert.ToDateTime(dr[fldname]); }static public int GetInt(DataRow dr, string fldname)
{ if (dr.IsNull(fldname)) //return int.MinValue; return 0; return Convert.ToInt32(dr[fldname]); }static public string GetString(DataRow dr, string fldname)
{ return dr[fldname].ToString(); }static public decimal GetDecimal(DataRow dr, string fldname)
{ if (dr.IsNull(fldname)) //return decimal.MinValue; return 0; return Convert.ToDecimal(dr[fldname]); }static public Int64 GetInt64(DataRow dr, string fldname)
{ if (dr.IsNull(fldname)) return Int64.MinValue; return Convert.ToInt64(dr[fldname]); }static public double GetDouble(DataRow dr, string fldname)
{ if (dr.IsNull(fldname)) return double.MinValue; return Convert.ToDouble(dr[fldname]); }
#region
/// <summary> /// 向数据库中插入或更新数据时，设置存储过程参数，如果数据库中该列值允许null，则插入null值 /// </summary> /// <param name="pName">存储过程参数名</param> /// <param name="pValue">参数值</param> public static SqlParameter SetParam(string pName, object pValue) { //如果pValue为null，则直接返回 2004-12-6 if (pValue == null) return new SqlParameter(pName, DBNull.Value); switch (Type.GetTypeCode(pValue.GetType())) { case TypeCode.String: string tempStr = (string)pValue; if (tempStr == null || tempStr.Trim().Length == 0) return new SqlParameter(pName, DBNull.Value); return new SqlParameter(pName, tempStr); case TypeCode.DateTime: DateTime tempdt = (DateTime)pValue; if (tempdt == DateTime.MinValue) return new SqlParameter(pName, DBNull.Value); return new SqlParameter(pName, tempdt); default: return new SqlParameter(pName, pValue); } }#endregion
#region 设置存储过程输出参数
/// <summary> /// 设置存储过程输出参数 /// </summary> /// <param name="pName">参数名称</param> /// <param name="otype">参数类型</param> /// <param name="size">参数的长度</param> /// <returns></returns> public static SqlParameter SetOutParam(string pName, SqlDbType otype, int size) {SqlParameter oprm = new SqlParameter(pName, otype, size);
oprm.Direction = ParameterDirection.Output; return oprm; } #endregion #region 设置存储过程输出参数 /// <summary> /// 设置存储过程输出参数 /// </summary> /// <param name="pName">参数名称</param> /// <param name="otype">参数类型</param> /// <param name="size">参数的长度</param> /// <returns></returns> public static SqlParameter SetReturnParam(string pName, SqlDbType otype, int size) {SqlParameter oprm = new SqlParameter(pName, otype, size);
oprm.Direction = ParameterDirection.ReturnValue; return oprm; } #endregion }}