C#通过反射生成sql
Posted seven77yixuan
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1、定义特性标志表或表字段
public class ExtendAttribute
{
/// <summary>
/// 表示在自动生成SQL语句时，不处理该字段
/// </summary>
[AttributeUsage(AttributeTargets.Property)]
[Serializable]
public class ExcludeFieldAttribute : Attribute
{
/// <summary>
/// 获取元数据的特性
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public static ExcludeFieldAttribute GetAttribute(MemberInfo item)
{
var excludeFieldAttribute = (ExcludeFieldAttribute)GetCustomAttribute(item, typeof(ExcludeFieldAttribute));
return excludeFieldAttribute;
}
}
/// <summary>
/// 表信息
/// </summary>
[AttributeUsage(AttributeTargets.Class)]
[System.Serializable]
public class TableInfoAttribute : Attribute
{
public TableInfoAttribute(string tableName)
{
TableName = tableName;
}
/// <summary>
/// 数据库中表的名称
/// </summary>
public string TableName { get; set; }
/// <summary>
/// 获取元数据的特性
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public static TableInfoAttribute GetAttribute(Type item)
{
var excludeFieldAttribute = (TableInfoAttribute)GetCustomAttribute(item, typeof(TableInfoAttribute));
return excludeFieldAttribute;
}
}
/// <summary>
/// 标记字段为自增长类型的字段
/// </summary>
[AttributeUsage(AttributeTargets.Property, AllowMultiple = false)]
[System.Serializable]
public class IdentityAttribute : Attribute
{
public static IdentityAttribute GetAttribute(MemberInfo member)
{
return (IdentityAttribute)GetCustomAttribute(member, typeof(IdentityAttribute));
}
}
}
2、实体类
[TableInfo("users")]
public class Users
{
[Identity]
public int Id { get; set; }
public Users()
{
this.Account = string.Empty;
this.Password = string.Empty;
this.Status = 0;//用户状态: -1失效，0正常，1禁用
this.Type = 1;//普通用户
this.CreateDate = this.UpdateDate = DateTime.Now;
this.CreateUser = this.UpdateUser = -1;//-1为系统添加
}
/// <summary>
/// 用户名
/// </summary>
public string Account { get; set; }
/// <summary>
///
/// </summary>
public string Password { get; set; }
/// <summary>
/// 运维备用密码
/// </summary>
public string RePassword { get; set; }
/// <summary>
/// 用户类型:0超级管理员,1普通成员,2运维人员
/// </summary>
public int Type { get; set; }
/// <summary>
/// 用户状态 -1 冻结 0正常
/// </summary>
public int Status { get; set; }
/// <summary>
/// 创建时间
/// </summary>
public DateTime CreateDate { get; set; }
public int CreateUser { get; set; }
/// <summary>
/// 更新时间
/// </summary>
public DateTime UpdateDate { get; set; }
public int UpdateUser { get; set; }
[ExcludeField]
public string Test { get; set; }
}
3、生成sql类
public class DatabaseSql
{
public DbProviderFactory _factory;
private static DatabaseSql _dataSql = new DatabaseSql();
public static DatabaseSql DataSql
{
get
{
return _dataSql;
}
}
#region 字段
/// <summary>
/// 分页查询的外部查询语句
/// <para>索引0：实际查询语句</para>
/// <para>索引1：排序规则</para>
/// <para>索引2：start</para>
/// <para>索引3：end</para>
/// </summary>
private string _selectSqlString = @" SELECT *
FROM ( SELECT ROW_NUMBER() OVER (ORDER BY {1} ) AS RowIndex , *
FROM ( {0} ) a
) v WHERE v.RowIndex BETWEEN {2} AND {3} ";
private string _deleteSqlString = @"DELETE FROM {0} ";
private string _truncateSql = @"TRUNCATE TABLE {0} ";
private string _updateSqlString = @"UPDATE {0} SET {1} WHERE {2} ";
private string _insertSqlString = @"INSERT INTO {0} ({1}) VALUES ({2});";
private string _identitySqlString = @" SELECT @@Identity AS ID; ";
private string _paramPrefix = @"@";
public DbType _dbType { get; set; }
#endregion
/// <summary>
/// 替换特殊函数
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public string Recombine(string sql)
{
//目前只选择sqlserver数据
_dbType = DbType.SqlServer;
switch (_dbType)
{
case DbType.SqlServer:
break;
case DbType.Oracle:
sql = sql.Replace("@", _paramPrefix);
sql = sql.Replace("isnull(", "NVL(")
.Replace("ISNULL(", "NVL(")
.Replace("getDate()", "SYSDATE")
.Replace("getdate()", "SYSDATE")
.Replace("GETDATE()", "SYSDATE");
break;
case DbType.mysql:
sql = sql.Replace("isnull(", "ifnull(")
.Replace("ISNULL(", "ifnull(")
.Replace("getDate()", "now()")
.Replace("getdate()", "now()")
.Replace("GETDATE()", "now()");
break;
}
return sql;
}
private dynamic GetTypeValue(object obj)
{
var typeName = obj.GetType().Name;
if (typeName == "String" || typeName == "DateTime")
{
return $"‘{obj}‘";
}
else if (typeName == "Boolean")
{
return ((Boolean)obj) ? 0 : 1;
}
else
{
return obj;
}
}
#region 删除
/// <summary>
/// 数据库截断
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public string TruncateToSql<T>()
{
Type type = typeof(T);
TableInfoAttribute tableInfoAttribute = TableInfoAttribute.GetAttribute(type);
string tableName = tableInfoAttribute != null ? tableInfoAttribute.TableName : type.Name;
string truncateSql = String.Format(_truncateSql, tableName);
return Recombine(truncateSql);
}
/// <summary>
/// 根据sql条件删除
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="where"></param>
/// <returns></returns>
public string DeleteToSql<T>(string where)
{
if (string.IsNullOrEmpty(where))
{
throw new Exception("删除条件不能为空");
}
if (!where.Trim().StartsWith("where", StringComparison.InvariantCultureIgnoreCase))
{
where = " WHERE " + where;
}
Type type = typeof(T);
TableInfoAttribute tableInfoAttribute = TableInfoAttribute.GetAttribute(type);
string tableName = tableInfoAttribute != null ? tableInfoAttribute.TableName : type.Name;
string deleteSql = string.Format(_deleteSqlString,tableName) + where;
return Recombine(deleteSql);
}
public string DeleteToSql<T>(string keyColName, List<long> ids)
{
if (string.IsNullOrEmpty(keyColName))
{
throw new Exception("指定key列值不能为空");
}
if (ids == null || ids.Count <= 0)
{
throw new Exception("ids为null或者传参个数小于等于0！");
}
Type type = typeof(T);
TableInfoAttribute tableInfoAttribute = TableInfoAttribute.GetAttribute(type);
string tableName = tableInfoAttribute != null ? tableInfoAttribute.TableName : type.Name;
var idstr = string.Concat(ids.Select(p => p + ",").ToList()).TrimEnd(‘,‘);
string where = $"where {keyColName} in ({idstr})";
string deleteSql = string.Format(_deleteSqlString, tableName) + where;
return Recombine(deleteSql);
}
#endregion
#region 添加
/// <summary>
/// 获取添加sql
/// </summary>
/// <param name="entity"></param>
/// <param name="paramCount">批量插入时，传递参数值避免重复</param>
/// <param name="isParams"></param>
/// <param name="dbType"></param>
/// <returns></returns>
public string AddToSql<T>(T entity,int paramCount, bool isParams,List<DbParameter> parameters, DbType dbType = DbType.SqlServer)
{
if (entity == null) throw new Exception("类型为空！");
Type type = entity.GetType();
TableInfoAttribute tableInfoAttribute = TableInfoAttribute.GetAttribute(type);
string tableName = tableInfoAttribute != null ? tableInfoAttribute.TableName : type.Name;
StringBuilder key = new StringBuilder();
StringBuilder value = new StringBuilder();
StringBuilder sql = new StringBuilder();
bool pk = false;
int count = 0;
foreach (PropertyInfo item in type.GetProperties())
{
if (ExcludeFieldAttribute.GetAttribute(item) != null) continue;//自增属性不处理
if (IdentityAttribute.GetAttribute(item) != null)
{
pk = true;
continue;
}//自增长列不处理
var values = item.GetValue(entity, null);
if (values == null || values == DBNull.Value) continue;
if (values == null) continue;
if (values.ToString().StartsWith("0001")) continue;//空日期
//if(RequiredAttribute.GetCustomAttribute(item.Module,item.GetType())==null)
// throw new Exception("此列属性为必填项");
if (count != 0)
{
key.Append(‘,‘);
value.Append(‘,‘);
}
key.Append(item.Name);
if (!isParams)
{
value.Append(GetTypeValue(values));
}
else
{
value.Append(‘@‘ + item.Name + paramCount);
if (parameters == null) new Exception("传递sql参数集合为空！");
if (_factory==null) throw new Exception("_factory链接数据库类型失败！");
DbParameter p = _factory.CreateParameter();
p.ParameterName = "@" + item.Name + paramCount;
p.Value = item.GetValue(entity);
p.DbType = (System.Data.DbType)Enum.Parse(typeof(System.Data.DbType), values.GetType().Name);
parameters.Add(p);
}
count++;
}
sql.Append(string.Format(_insertSqlString, tableName, key, value));
if (pk)
{
switch (dbType)
{
case DbType.Oracle:
break;
case DbType.SqlServer:
sql.AppendFormat(_identitySqlString);
break;
case DbType.MySql:
sql.AppendFormat(";");
sql.AppendLine(_identitySqlString);
break;
}
}
return Recombine(sql.ToString());
}
/// <summary>
/// 添加一组对象
/// </summary>
/// <param name="entities"></param>
/// <param name="dbType"></param>
/// <param name="isValue"></param>
/// <returns></returns>
public string AddRangeToSql<T>(ICollection<T> entities, bool isParams, List<DbParameter> parameters, DbType dbType = DbType.SqlServer)
{
if (entities == null)
{
throw new ArgumentNullException("entities", "列表为空");
}
StringBuilder insert = new StringBuilder();
int paramCount = 0;
foreach (T entity in entities)
{
if (dbType == DbType.Oracle) insert.Append("BEGIN");
if (entity == null) continue;
//dic.Add(new KeyValuePair<dynamic, string> (entity, AddToSql(entity, dbType)));
insert.Append(AddToSql<T>(entity, paramCount, isParams, parameters,dbType));
if (dbType == DbType.Oracle) insert.Append("END");
paramCount++;
}
return Recombine(insert.ToString());
}
#endregion
#region 更新
/// <summary>
/// 更新指定表的指定字段
/// </summary>
/// <param name="tableName">表名称</param>
/// <param name="fieldName">字段名称</param>
/// <param name="value">字段值</param>
/// <param name="where">更新条件</param>
/// <returns></returns>
public string UpdateField(string tableName, string fieldName, string value, string where)
{
if (!where.TrimStart().StartsWith("where", StringComparison.OrdinalIgnoreCase))
{
where = " WHERE " + where;
}
value = "‘" + value + "‘";
string updateSql = string.Format("UPDATE {0} SET {1}={2} {3}", tableName, fieldName, value, where);
return updateSql;
}
/// <summary>
/// 更新字段
/// </summary>
/// <param name="tableName">表名</param>
/// <param name="fieldvalues">字段名称和字段值的键值对集合</param>
/// <param name="where">更新条件</param>
/// <returns></returns>
public string UpdateFields(string tableName, List<KeyValuePair<string, string>> fieldvalues, string where)
{
if (!string.IsNullOrEmpty(where))
{
if (!where.TrimStart().StartsWith("where", StringComparison.CurrentCultureIgnoreCase))
{
where = " WHERE " + where;
}
}
StringBuilder updateSql = new StringBuilder().AppendFormat("UPDATE {0} SET ", tableName);
for (int i = 0; i < fieldvalues.Count; i++)
{
string value = fieldvalues[i].Value == null ? "NULL" : string.Format("{0}", fieldvalues[i].Value);
updateSql.AppendFormat("{0}=‘{1}‘", fieldvalues[i].Key, value);
if (i < fieldvalues.Count - 1)
updateSql.Append(",");
//updateSql.AppendLine();
}
updateSql.Append(where);
return updateSql.ToString();
}
/// <summary>
/// 更新sql
/// </summary>
/// <param name="entity"></param>
/// <param name="isValue"></param>
/// <returns></returns>
public string UpdateToSql<T>(dynamic entity,string where, bool isParams, List<DbParameter> parameters, DbType dbType = DbType.SqlServer)
{
if (entity == null) throw new Exception(entity.GetType().Name + "类型为空！");
Type type = entity.GetType();//更新参数
Type obj = typeof(T);
TableInfoAttribute tableInfoAttribute = TableInfoAttribute.GetAttribute(obj);
string tableName = tableInfoAttribute != null ? tableInfoAttribute.TableName : obj.Name;
StringBuilder set = new StringBuilder();
int count = 0;
foreach (PropertyInfo item in type.GetProperties())
{
if (ExcludeFieldAttribute.GetAttribute(item) != null) continue;//自增属性不处理
if (IdentityAttribute.GetAttribute(item) != null) continue;
if (count != 0) set.Append(",");
object values = item.GetValue(entity, null);
if (!isParams)
{
set.AppendFormat("{0} = ‘{1}‘", item.Name, values);
}
else
{
if (values == null) continue;
if (values.ToString().StartsWith("0001")) continue;//空日期
set.AppendFormat("{0} = @{0}", item.Name);
if (parameters == null) new Exception("传递sql参数集合为空！");
if (_factory == null) throw new Exception("_factory链接数据库类型失败！");
DbParameter p = _factory.CreateParameter();
p.ParameterName = "@" + item.Name;
p.Value = item.GetValue(entity);
p.DbType = (System.Data.DbType)Enum.Parse(typeof(System.Data.DbType), values.GetType().Name);
parameters.Add(p);
}
count++;
}
return Recombine(string.Format(_updateSqlString, tableName, set, where));
}
/// <summary>
/// 更新sql
/// </summary>
/// <param name="entity"></param>
/// <param name="where"></param>
/// <param name="paramCount"></param>
/// <param name="isParams"></param>
/// <returns></returns>
public string UpdateToSql<T>(dynamic entity, List<KeyValuePair<string, string>> fieldvalues, bool isParams, List<DbParameter> parameters, DbType dbType = DbType.SqlServer)
{
StringBuilder where = new StringBuilder("1=1");
if (!isParams)
{
where.Append(string.Concat(fieldvalues.Select(p => $" and {p.Key}=‘{p.Value}‘")));
}
else
{
foreach(var item in fieldvalues)
{
if (item.Value == null) continue;
where.Append($" and {item.Key}[email protected]{item.Key + 000}");//防止与set一致名称几率，顾加000
DbParameter p = _factory.CreateParameter();
p.ParameterName = "@" + item.Key + 000;
p.Value = item.Value;
p.DbType = (System.Data.DbType)Enum.Parse(typeof(System.Data.DbType), item.GetType().Name);
parameters.Add(p);
}
}
return UpdateToSql<T>(entity,where.ToString(),isParams, parameters);
}
#endregion
#region 查询
/// <summary>
/// 单表查询
/// </summary>
/// <param name="type"></param>
/// <param name="where"></param>
/// <param name="dbType"></param>
/// <returns></returns>
public string SelectToSql<T>(string where, bool IsCount = false, DbType dbType = DbType.SqlServer)
{
if (!string.IsNullOrEmpty(where))
{
if (!where.TrimStart().StartsWith("WHERE", StringComparison.CurrentCultureIgnoreCase))
{
where = "Where " + where;
}
}
StringBuilder sql = new StringBuilder("SELECT ");//不考虑多表操作
//添加的sql语句
Type type = typeof(T);
PropertyInfo[] infos = type.GetProperties();
if (IsCount)
{
sql.Append("COUNT(1) ");
}
else
{
foreach (PropertyInfo pro in infos)
{
if (ExcludeFieldAttribute.GetAttribute(pro) != null) continue;//自定义扩展属性不处理
sql.Append(pro.Name + ‘,‘);
}
sql = sql.Remove(sql.Length - 1, 1);
}
TableInfoAttribute tableInfo = TableInfoAttribute.GetAttribute(type);
string tableName = tableInfo == null ? type.Name : tableInfo.TableName;
//sql.AppendLine();
sql.AppendFormat(" FROM {0} ", tableName);
sql.Append(where);
return Recombine(sql.ToString());
}
/// <summary>
/// 分页sql
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="page"></param>
/// <param name="strWhere"></param>
/// <param name="orderBy"></param>
/// <param name="dbType"></param>
/// <returns></returns>
public string SelectSql<T>(PageHelp page, string strWhere = "1=1", string orderBy = "", DbType dbType = DbType.SqlServer)
{
if (string.IsNullOrEmpty(strWhere))
strWhere = "1=1";
Type type = typeof(T);
PropertyInfo pk = type.GetProperties().FirstOrDefault(p => IdentityAttribute.GetAttribute(p) != null);
if (string.IsNullOrEmpty(orderBy))
{
if (pk != null)
orderBy = pk.Name;
else throw new Exception("未设置排序字段");
}
if (orderBy.Trim().StartsWith("ORDER BY", StringComparison.CurrentCultureIgnoreCase))
{
orderBy = orderBy.ToLower().Replace("order by", " ");
}
string dataSql = string.Format(_selectSqlString
, SelectToSql<T>(strWhere)
, orderBy
, page.LowerLimit
, page.UpperLimit);
return Recombine(dataSql);
}
/// <summary>
/// 根据主键进行查询
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="id"></param>
/// <returns></returns>
public string SqlectByIdToSql<T>(long id, DbType dbType = DbType.SqlServer)
{
Type t = typeof(T);
PropertyInfo info = t.GetProperties().First(p => IdentityAttribute.GetAttribute(p) != null);
if (info != null)
{
string str = info.Name + "=" + id;
return SelectToSql<T>(str);
}
throw new Exception("No Find Identity");
}
/// <summary>
/// 根据主键进行查询
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="id"></param>
/// <returns></returns>
public string SqlectByIdListToSql<T>(List<long> ids, DbType dbType = DbType.SqlServer)
{
Type t = typeof(T);
PropertyInfo info = t.GetProperties().First(p => IdentityAttribute.GetAttribute(p) != null);
if (info != null)
{
var idstr = string.Concat(ids.Select(p => p + ",").ToList()).TrimEnd(‘,‘);
string where = $"{info.Name} in ({idstr})";
return SelectToSql<T>(where);
}
throw new Exception("No Find Identity");
}
#endregion
}
4、ADO.NET 执行sql
public class DataBase
{
#region 字段
///数据库的命名空间名
private string _connProviderName;
/// 连接的字符串
private readonly string _connString;
///各个数据库库的抽象工厂
private DbProviderFactory _factory;
///生产Sql语句的对象
DatabaseSql _dataSql = DatabaseSql.DataSql;
///数据库类型
private DbType _dbType = DbType.SqlServer;
///委托
private delegate dynamic ExecuteTranc(IDbCommand comm);
#endregion
#region 构造函数
public DataBase(string configKey)
{
_connProviderName = ConfigHelper.GetConnStringProviderName(configKey);
if (!string.IsNullOrEmpty(_connProviderName))
{
_factory = DbProviderFactories.GetFactory(_connProviderName);
_dataSql._factory = this._factory;
_connString = ConfigHelper.GetConnStringStr(configKey);
}
else
{
throw new Exception("connectString中providerName不存在");
}
}
#endregion
#region 获取ADO对象
/// <summary>
/// 获取链接数据对象
/// </summary>
/// <returns>返回Connection对象</returns>
private IDbConnection GetConnection()
{
IDbConnection connection = _factory.CreateConnection();
connection.ConnectionString = _connString;
connection.Open();
return connection;
}
/// <summary>
/// 获取Command对象
/// </summary>
/// <param name="sqlString">传送完整的sql语句</param>
/// <param name="commandType">执行的是sql语句还是，存储过程</param>
/// <param name="commandTimeout">链接数据的时间限制</param>
/// <returns>Command对象</returns>
private IDbCommand GetCommand(string sqlString, CommandType commandType = CommandType.Text,
int? commandTimeout = 360)
{
IDbCommand command = _factory.CreateCommand();
command.Connection = GetConnection();
command.CommandText = sqlString;
command.CommandType = commandType;
command.CommandTimeout = commandTimeout.Value;
return command;
}
#endregion
#region 执行sql
#region 执行sql
/// <summary>
/// 执行command命令
/// </summary>
/// <param name="etFunc">调用方法名</param>
/// <param name="sqlString">传送完整的sql语句</param>
/// <param name="commandType">执行的是sql语句还是，存储过程</param>
/// <param name="commandTimeout">链接数据的时间限制</param>
/// <returns></returns>
private dynamic ExTranc(ExecuteTranc executeFunc, string sqlString, List<DbParameter> parameters = null, bool IsOpenTran = true, CommandType commandType = CommandType.Text, int? commandTimeout = 60)
{
using (IDbCommand comm = GetCommand(sqlString, commandType, commandTimeout))
{
using (comm.Connection)
{
dynamic result;
IDbTransaction tran = null;
if (parameters != null && parameters.Count > 0)
{
foreach (var item in parameters)
{
comm.Parameters.Add(item);
}
}
if (IsOpenTran)
{
tran = comm.Connection.BeginTransaction();
}
try
{
comm.Transaction = tran;
result = executeFunc(comm);
if (tran != null) tran.Commit();
return result;
}
catch (Exception ex)
{
MyLogHelper.Erorr(ex.Message);
try
{
if (tran != null) tran.Rollback();
}
catch (Exception)
{
string exce = "发生错误，SQL语句为：" + sqlString;
MyLogHelper.Erorr(exce + "\r\n" + ex.Message);
throw new Exception(exce, ex);
}
}
return 0;
}
}
}
#endregion
#region 单行单列
/// <summary>
/// 传送sql语句，执行增删改操作
/// </summary>
/// <param name="sql">完整sql语句</param>
/// <returns>受影响行数</returns>
public int ExecuteSql(string sql)
{
return ExTranc(ExecuteNonQuery, sql);
}
//public int ExecuteSql(string sql,object obj)
//{
// List<DbParameter> ps = new List<DbParameter>();
// //反射对象进行赋值到参数
// return ExTranc(ExecuteNonQuery, sql,ps);
//}
/// <summary>
/// 返回首行首列数据
/// </summary>
/// <param name="sql">完整sql语句</param>
/// <returns>受影响行数</returns>
public int ExecuteScalarSql(string sql)
{
return ExTranc(ExecuteScalar, sql);
}
/// <summary>
/// 返回首行首列数据
/// </summary>
/// <param name="comm">Command对象</param>
/// <param name="obj"></param>
private dynamic ExecuteScalar(IDbCommand comm)
{
object obj = comm.ExecuteScalar();
dynamic dy = obj;
if (obj.GetType() == typeof(int)) dy = (int)obj;
if (obj.GetType() == typeof(long)) dy = (long)obj;
if (obj.GetType() == typeof(decimal)) dy = (decimal)obj;
if (obj.GetType() == typeof(bool)) dy = (bool)obj;
if (obj.GetType() == typeof(DateTime)) dy = (DateTime)obj;
if (obj.GetType() == typeof(string)) dy = obj.ToString();
return dy;
}
/// <summary>
/// 执行增删改语句命名
/// </summary>
/// <param name="comm">Command对象</param>
/// <param name="obj"></param>
private dynamic ExecuteNonQuery(IDbCommand comm)
{
return comm.ExecuteNonQuery();
}
#endregion
#region 删除
/// <summary>
/// 指定字段批量删除
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="keyColName"></param>
/// <param name="ids"></param>
/// <returns></returns>
public int DelectEntity<T>(string keyColName, List<long> ids)
{
return ExTranc(ExecuteNonQuery, _dataSql.DeleteToSql<T>(keyColName, ids));
}
/// <summary>
/// 删除实体对象
/// </summary>
/// <typeparam name="T">实体对象</typeparam>
/// <param name="where">删除sql条件</param>
/// <returns>受影响行数</returns>
public int DelectEntity<T>(string where)
{
return ExTranc(ExecuteNonQuery, _dataSql.DeleteToSql<T>(where));
}
/// <summary>
/// 删除全部数据，自增列重新排序
/// </summary>
/// <typeparam name="T">实体对象</typeparam>
/// <returns>受影响行数</returns>
public int TruncateTable<T>()
{
return ExTranc(ExecuteNonQuery, _dataSql.TruncateToSql<T>());
}
#endregion
#region 添加
/// <summary>
/// 添加单个对象
/// </summary>
/// <param name="entity">实体对象</param>
/// <returns>受影响行数</returns>
public int AddEntity<T>(T entity)
{
return ExTranc(ExecuteNonQuery, _dataSql.AddToSql<T>(entity, 0, false, null, _dbType));
}
public int AddEntity<T>(T entity, bool isParams)
{
List<DbParameter> parameters = new List<DbParameter>();
string insertSql = _dataSql.AddToSql(entity, 0, isParams, parameters, this._dbType);
return ExTranc(ExecuteNonQuery, insertSql, parameters);
}
/// <summary>
/// 添加一组对象
/// </summary>
/// <param name="entities">添加集合</param>
/// <returns>受影响行数</returns>
public int AddEntities<T>(ICollection<T> entities)
{
//List<KeyValuePair<dynamic,string>> dic = new List<KeyValuePair<dynamic,string>>();
string insertSql = _dataSql.AddRangeToSql(entities, false, null, _dbType);
//foreach(KeyValuePair<dynamic,string> k in dic){
// Execute(k.Value, k.Key,CommandType.Text);
// count++;
//}
return ExTranc(ExecuteNonQuery, insertSql);
}
public int AddEntities<T>(ICollection<T> entities, bool isParams)
{
if (entities!=null && entities.Count > 1000)
{
MyLogHelper.Erorr($"{typeof(T).Name}插入行数超过1000条");
throw new Exception("插入行数超过1000条");
}
List<DbParameter> parameters = new List<DbParameter>();
string insertSql = _dataSql.AddRangeToSql(entities, isParams, parameters, this._dbType);
return ExTranc(ExecuteNonQuery, insertSql, parameters);
}
#endregion
#region 更新
/// <summary>
/// 更新单个对象
/// </summary>
/// <param name="entity"></param>
/// <param name="primaryKeyField"></param>
/// <returns></returns>
public int UpdateEntity<T>(object entity, string where)
{
return ExTranc(ExecuteNonQuery, _dataSql.UpdateToSql<T>(entity, where, false, null, _dbType));
}
public int UpdateEntity<T>(object entity, string where, bool isParams)
{
List<DbParameter> parameters = new List<DbParameter>();
string updateSql = _dataSql.UpdateToSql<T>(entity, where, isParams, parameters, _dbType);
MyLogHelper.Warn("测试sql是否执行："+ updateSql);
return ExTranc(ExecuteNonQuery, updateSql, parameters);
}
///// <summary>
///// 更新一组对象
///// </summary>
///// <param name="entity"></param>
///// <param name="primaryKeyField"></param>
///// <returns></returns>
public int UpdateEntity<T>(object entity, List<KeyValuePair<string, string>> fieldvalues)
{
return ExTranc(ExecuteNonQuery, _dataSql.UpdateToSql<T>(entity, fieldvalues, false, null, _dbType));
}
public int UpdateEntity<T>(object entity, List<KeyValuePair<string, string>> fieldvalues, bool isParams)
{
List<DbParameter> parameters = new List<DbParameter>();
string updateSql = _dataSql.UpdateToSql<T>(entity, fieldvalues, isParams, parameters, _dbType);
return ExTranc(ExecuteNonQuery, updateSql, parameters);
}
public int UpdateField(string tableName, string fieldName, string value, string where)
{
return ExTranc(ExecuteNonQuery, _dataSql.UpdateField(tableName, fieldName, value, where));
}
public int UpdateFields(string tableName, List<KeyValuePair<string, string>> fieldvalues, string where)
{
return ExTranc(ExecuteNonQuery, _dataSql.UpdateFields(tableName, fieldvalues, where));
}
#endregion
#region 查询
/// <summary>
/// 获取对象的集合
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sql"></param>
/// <returns></returns>
public List<T> GetListEntity<T>(string sqlString, CommandType commandType = CommandType.Text)
{
List<T> result = new List<T>();
using (IDbCommand comm = GetCommand(_dataSql.Recombine(sqlString), commandType))
{
using (comm.Connection)
{
using (IDataReader reader = comm.ExecuteReader())
{
while (reader.Read())
{
result.Add(GetEntity<T>(reader));
}
}
}
}
return result;
}
public List<T> GetAllEntity<T>(CommandType commandType = CommandType.Text)
{
return GetListEntity<T>(_dataSql.SelectToSql<T>(null), commandType);
}
/// <summary>
/// 获取单个对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sql"></param>
/// <returns></returns>
public T GetEntity<T>(string sql, object entity = null)
{
List<T> list = GetListEntity<T>(sql);
T result = default(T);
if (list != null && list.Count > 0)
{
result = list.FirstOrDefault<T>();
}
return result;
}
private T GetEntity<T>(IDataReader dr)
{
T t = Activator.CreateInstance<T>();
string name = "";
for (int i = 0; i < dr.FieldCount; i++)
{
if (!dr[i].Equals(DBNull.Value))
{
name = dr.GetName(i).Substring(0, 1).ToUpper() + dr.GetName(i).Substring(1);
if (typeof(T).GetProperty(name) != null)
typeof(T).GetProperty(name).SetValue(t, dr[i], null);
}
}
return t;
}
public T GetEntityByID<T>(long id)
{
string sql = _dataSql.SqlectByIdToSql<T>(id);
List<T> list = GetListEntity<T>(sql, CommandType.Text);
T result = default(T);
if (list != null && list.Count > 0)
{
result = list.FirstOrDefault<T>();
}
return result;
}
public List<T> GetEntityByIDs<T>(List<long> ids)
{
string sql = _dataSql.SqlectByIdListToSql<T>(ids, _dbType);
return GetListEntity<T>(sql);
}
#endregion
#endregion
#region MyRegion
public static void SqlBulkCopyInsert(string conStr, string strTableName, DataTable dtData)
{
try
{
using (SqlBulkCopy sqlRevdBulkCopy = new SqlBulkCopy(conStr))//引用SqlBulkCopy
{
sqlRevdBulkCopy.DestinationTableName = strTableName;//数据库中对应的表名
sqlRevdBulkCopy.NotifyAfter = dtData.Rows.Count;//有几行数据
sqlRevdBulkCopy.WriteToServer(dtData);//数据导入数据库
sqlRevdBulkCopy.Close();//关闭连接
}
}
catch (Exception ex)
{
throw (ex);
}
}
#endregion
}
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