208 lines
9.6 KiB
C#
208 lines
9.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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namespace CodeBuilderApi
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{
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/// <summary>
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/// 数据表操作类
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/// </summary>
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/// <typeparam name="T"></typeparam>
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public class OperationDataHelper<T>
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{
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#region 方法 -> 类型匹配
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/// <summary>
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/// 类型匹配
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/// </summary>
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/// <param name="type">类型</param>
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/// <param name="typeName">类型名称</param>
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/// <returns></returns>
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public static bool IsType(Type type, string typeName)
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{
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if (type.ToString() == typeName)
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return true;
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if (type.ToString() == "System.Object")
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return false;
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return IsType(type.BaseType, typeName);
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}
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#endregion
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#region 获取通用表数据查询条件
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/// <summary>
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/// 获取通用表数据查询条件
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/// </summary>
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/// <param name="t">实体类</param>
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/// <param name="QueryType">查询方式：0【模糊查询】，1【精确查询】</param>
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/// <param name="OtherName">查询表定义名称，如A.</param>
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/// <param name="ExcludeName">排除查询的字段</param>
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/// <returns></returns>
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public static string GetWhereSQL(T t, int? QueryType, string OtherName = "", params string[] ExcludeName)
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{
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string WhereSQL = "";
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var pros = typeof(T).GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly);
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foreach (var item in pros)
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{
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object value = item.GetValue(t, null);
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//如果排除字段中包含当前参数，则执行下一个参数查询
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if (ExcludeName != null && ExcludeName.Contains(item.Name))
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{
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continue;
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}
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//查询字符串类型参数
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if (IsType(item.PropertyType, "System.String") || item.PropertyType == typeof(String))
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{
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if (value != null && !string.IsNullOrEmpty(value.ToString()))
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{
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WhereSQL += (string.IsNullOrEmpty(WhereSQL) ? "" : " AND ") + OtherName + item.Name +
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(QueryType == 0 ? " like '%" + value + "%'" : " = '" + value + "'");
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}
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continue;
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}
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//查询数字类型或bool型参数
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if (IsType(item.PropertyType, "System.Nullable`1[System.Int16]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Int32]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Int64]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Double]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Decimal]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Boolean]") ||
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item.PropertyType == typeof(Int16) || item.PropertyType == typeof(Int32) || item.PropertyType == typeof(Int64) ||
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item.PropertyType == typeof(Double) || item.PropertyType == typeof(Decimal) || item.PropertyType == typeof(Boolean))
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{
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if (value != null)
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{
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WhereSQL += (string.IsNullOrEmpty(WhereSQL) ? "" : " AND ") + OtherName + item.Name + " = " + value;
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}
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continue;
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}
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//查询日期类型参数
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if (IsType(item.PropertyType, "System.Nullable`1[System.DateTime]") ||
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item.PropertyType == typeof(DateTime))
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{
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if (value != null)
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{
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WhereSQL += (string.IsNullOrEmpty(WhereSQL) ? "" : " AND ") + OtherName + item.Name + " = " +
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string.Format("TO_DATE('{0}','YYYY/MM/DD HH24:MI:SS')", value);
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}
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continue;
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}
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}
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return WhereSQL;
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}
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#endregion
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#region 获取数据表执行语句（0：新增；1：修改）
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/// <summary>
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/// 获取数据表执行语句
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/// </summary>
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/// <param name="t">泛型数据对象</param>
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/// <param name="ExcuteType">
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/// 执行类型<br/>
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/// 0：新增；1：修改
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/// </param>
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/// <returns></returns>
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/// <param name="tableName">数据库表名称</param>
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/// <param name="keyField">主键值名称</param>
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/// <param name="seqName">表序列名称</param>
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/// <param name="dateFieldList">日期类型的字段执行语句</param>
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/// <param name="excludeField">排除执行的字段</param>
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/// <param name="WhereSQL">where查询语句</param>
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public static string GetTableExcuteSQL(T t, int ExcuteType, string tableName, string keyField,
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string seqName, Dictionary<string, string> dateFieldList, List<string> excludeField, string WhereSQL = "")
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{
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string SQLString, InsertField = "", ExcuteSQL = "";
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var pros = typeof(T).GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly);
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foreach (var item in pros)
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{
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//排除掉用于查询的字段，这些字段不属于表的字段
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if (excludeField.Contains(item.Name))
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{
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continue;
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}
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//存储插入表中的字段名称
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InsertField += (InsertField == "" ? "" : ",") + item.Name;
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//获取当前对象中字段的值
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object value = item.GetValue(t, null);
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//判断是不是主键值
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if (item.Name == keyField)
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{
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//只有插入语句才会更新主键值
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if (ExcuteType == 0)
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{
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if (value != null)
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{
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//主键值存在则以对象中的值为准
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ExcuteSQL += (string.IsNullOrEmpty(ExcuteSQL) ? "" : ",\r\n") + value;
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}
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else
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{
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//否则执行表的序列，获取主键值
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ExcuteSQL += (string.IsNullOrEmpty(ExcuteSQL) ? "" : ",\r\n") + seqName + ".NEXTVAL";
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}
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}
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continue;
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}
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else if (dateFieldList.ContainsKey(item.Name))
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{
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//判断是不是日期字段，如果是就按照日期格式的字段去执行
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ExcuteSQL += (string.IsNullOrEmpty(ExcuteSQL) ? "" : ",\r\n") +
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(ExcuteType == 1 ? item.Name + " = " : "") + dateFieldList[item.Name];
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continue;
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}
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//查询字符串类型参数
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if (IsType(item.PropertyType, "System.String") || item.PropertyType == typeof(String))
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{
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ExcuteSQL += (string.IsNullOrEmpty(ExcuteSQL) ? "" : ",\r\n") +
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(ExcuteType == 1 ? item.Name + " = " : "") +
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(value == null ? "NULL" : "'" + value + "'");
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continue;
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}
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//查询数字类型或bool型参数
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if (IsType(item.PropertyType, "System.Nullable`1[System.Int16]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Int32]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Int64]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Double]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Decimal]") ||
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IsType(item.PropertyType, "System.Nullable`1[System.Boolean]") ||
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item.PropertyType == typeof(Int16) || item.PropertyType == typeof(Int32) || item.PropertyType == typeof(Int64) ||
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item.PropertyType == typeof(Double) || item.PropertyType == typeof(Decimal) || item.PropertyType == typeof(Boolean))
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{
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ExcuteSQL += (string.IsNullOrEmpty(ExcuteSQL) ? "" : ",\r\n") +
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(ExcuteType == 1 ? item.Name + " = " : "") +
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(value == null ? "NULL" : value.ToString());
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continue;
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}
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//查询日期类型参数
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if (IsType(item.PropertyType, "System.Nullable`1[System.DateTime]") ||
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item.PropertyType == typeof(DateTime))
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{
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ExcuteSQL += (string.IsNullOrEmpty(ExcuteSQL) ? "" : ",\r\n") +
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(ExcuteType == 1 ? item.Name + " = " : "") +
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(value == null ? "NULL" : string.Format("TO_DATE('{0}','YYYY/MM/DD HH24:MI:SS')", value));
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continue;
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}
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}
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switch (ExcuteType)
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{
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case 0://执行插入语句
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SQLString = string.Format("INSERT INTO {0} ({1}) VALUES ({2})", tableName, InsertField, ExcuteSQL);
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break;
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case 1://执行更新语句
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SQLString = string.Format("UPDATE {0} SET {1}{2}", tableName, ExcuteSQL, WhereSQL);
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break;
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default:
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SQLString = "";
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break;
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}
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return SQLString;
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}
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#endregion
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}
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}
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