/// <summary>
/// 假删除，根据表达示
/// 使用说明::
/// FalseDelete《T》(new int[]{1,2,3})或者Delete《T》(3)
/// </summary>
/// <param name="field">更新删除状态字段</param>
/// <param name="expression">筛选表达示</param>
public bool FalseDelete <T>(string field, Expression <Func <T, bool> > expression)
{
Type type = typeof(T);
string typeName = type.Name;
typeName = GetTableNameByClassType(typeName);
//属性缓存
string cachePropertiesKey = "db." + typeName + ".GetProperties";
var cachePropertiesManager = CacheManager <PropertyInfo[]> .GetInstance();
PropertyInfo[] props = null;
if (cachePropertiesManager.ContainsKey(cachePropertiesKey))
{
props = cachePropertiesManager[cachePropertiesKey];
}
else
{
props = type.GetProperties();
cachePropertiesManager.Add(cachePropertiesKey, props, cachePropertiesManager.Day);
}
bool isSuccess = false;
ResolveExpress re = new ResolveExpress();
re.ResolveExpression(re, expression);
string sql = string.Format("UPDATE {0} SET {1}=1 WHERE 1=1 {2}", typeName, field, re.SqlWhere);
int deleteRowCount = ExecuteCommand(sql, re.Paras.ToArray());
isSuccess = deleteRowCount > 0;
return(isSuccess);
}
/// <summary>
/// 返回序列的唯一元素；如果该序列并非恰好包含一个元素，则会引发异常。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="expression"></param>
/// <returns></returns>
public static T Single <T>(this Queryable <T> queryable, Expression <Func <T, bool> > expression)
{
var type = queryable.Type;
queryable.WhereIndex = queryable.WhereIndex + 100;
ResolveExpress re = new ResolveExpress(queryable.WhereIndex);
re.ResolveExpression(re, expression);
queryable.Where.Add(re.SqlWhere);
queryable.Params.AddRange(re.Paras);
return(queryable.ToList().Single());
}
/// <summary>
/// 删除,根据表达示
/// 使用说明:
/// Delete《T》(it=>it.id=100) 或者Delete《T》(3)
/// </summary>
/// <param name="expression">筛选表达示</param>
public bool Delete <T>(Expression <Func <T, bool> > expression)
{
Type type = typeof(T);
string typeName = type.Name;
typeName = GetTableNameByClassType(typeName);
ResolveExpress re = new ResolveExpress();
re.ResolveExpression(re, expression);
string sql = string.Format("DELETE FROM {0} WHERE 1=1 {1}", typeName, re.SqlWhere);
bool isSuccess = ExecuteCommand(sql, re.Paras.ToArray()) > 0;
return(isSuccess);
}
/// <summary>
/// 更新
/// 注意：rowObj为T类型将更新该实体的非主键所有列，如果rowObj类型为匿名类将更新指定列
/// 使用说明:sqlSugar.Update《T》(rowObj,whereObj);
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="rowObj">new T(){name="张三",sex="男"}或者new {name="张三",sex="男"}</param>
/// <param name="expression">it.id=100</param>
/// <returns></returns>
public bool Update <T>(object rowObj, Expression <Func <T, bool> > expression) where T : class
{
if (rowObj == null)
{
throw new ArgumentNullException("SqlSugarClient.Update.rowObj");
}
if (expression == null)
{
throw new ArgumentNullException("SqlSugarClient.Update.expression");
}
Type type = typeof(T);
string typeName = type.Name;
typeName = GetTableNameByClassType(typeName);
StringBuilder sbSql = new StringBuilder(string.Format(" UPDATE {0} SET ", typeName));
var rows = SqlSugarTool.GetParameters(rowObj);
string pkName = SqlSugarTool.GetPrimaryKeyByTableName(this, typeName);
foreach (var r in rows)
{
if (pkName == r.ParameterName.TrimStart('@'))
{
if (rowObj.GetType() == type)
{
continue;
}
}
sbSql.Append(string.Format(" [{0}] =@{0} ,", r.ParameterName.TrimStart('@')));
}
sbSql.Remove(sbSql.Length - 1, 1);
sbSql.Append(" WHERE 1=1 ");
ResolveExpress re = new ResolveExpress();
re.ResolveExpression(re, expression);
sbSql.Append(re.SqlWhere);;
List <SQLiteParameter> parsList = new List <SQLiteParameter>();
parsList.AddRange(re.Paras);
var pars = rows;
if (pars != null)
{
foreach (var par in pars)
{
//if (par.SqlDbType == SqlDbType.Udt)
//{
// par.UdtTypeName = "HIERARCHYID";
//}
SqlSugarTool.SetParSize(par);
parsList.Add(par);
}
}
try
{
var updateRowCount = ExecuteCommand(sbSql.ToString(), parsList.ToArray());
return(updateRowCount > 0);
}
catch (Exception ex)
{
var cacheManager = CacheManager <string> .GetInstance();
cacheManager.RemoveAll(it => it.Contains("KeyBy"));
throw new Exception("sql:" + sbSql.ToString() + "\n" + ex.Message);
}
}