/// <summary>
/// 泛型方法，反射生成UpdateSql语句
/// </summary>
/// <param name="entity">实体类</param>
/// <returns>int</returns>
public static StringBuilder UpdateSql <T>(T entity)
{
string pkName = GetKeyField <T>().ToString();
Type type = entity.GetType();
PropertyInfo[] props = type.GetProperties();
StringBuilder sb = new StringBuilder();
sb.Append("Update ");
sb.Append(EntityAttribute.GetTableName <T>());
sb.Append(" Set ");
bool isFirstValue = true;
foreach (PropertyInfo prop in props)
{
if (prop.GetValue(entity, null) != null && pkName != prop.Name)
{
if (isFirstValue)
{
isFirstValue = false;
sb.Append(prop.Name);
sb.Append("=");
sb.Append(DbParameters.CreateDbParmCharacter() + prop.Name);
}
else
{
sb.Append("," + prop.Name);
sb.Append("=");
sb.Append(DbParameters.CreateDbParmCharacter() + prop.Name);
}
}
}
sb.Append(" Where ").Append(pkName).Append("=").Append(DbParameters.CreateDbParmCharacter() + pkName);
return(sb);
}
/// <summary>
/// 拼接删除SQL语句
/// </summary>
/// <param name="entity">实体类</param>
/// <returns></returns>
public static StringBuilder DeleteSql <T>(T entity)
{
Type type = entity.GetType();
PropertyInfo[] props = type.GetProperties();
StringBuilder sb = new StringBuilder("Delete From " + EntityAttribute.GetTableName <T>() + " Where 1=1");
foreach (PropertyInfo prop in props)
{
if (prop.GetValue(entity, null) != null)
{
sb.Append(" AND " + prop.Name + " = " + DbParameters.CreateDbParmCharacter() + "" + prop.Name + "");
}
}
return(sb);
}
/// <summary>
/// 泛型方法，反射生成InsertSql语句
/// </summary>
/// <param name="entity">实体类</param>
/// <returns>int</returns>
public static StringBuilder InsertSql <T>(T entity)
{
Type type = entity.GetType();
StringBuilder sb = new StringBuilder();
sb.Append(" Insert Into ");
sb.Append(EntityAttribute.GetTableName <T>());
sb.Append("(");
StringBuilder sp = new StringBuilder();
StringBuilder sb_prame = new StringBuilder();
PropertyInfo[] props = type.GetProperties();
foreach (PropertyInfo prop in props)
{
if (prop.GetValue(entity, null) != null)
{
sb_prame.Append("," + (prop.Name));
sp.Append("," + DbParameters.CreateDbParmCharacter() + "" + (prop.Name));
}
}
sb.Append(sb_prame.ToString().Substring(1, sb_prame.ToString().Length - 1) + ") Values (");
sb.Append(sp.ToString().Substring(1, sp.ToString().Length - 1) + ")");
return(sb);
}
public int Update <T>(Expression <Func <T, bool> > condition) where T : class, new()
{
bool isTrans = true;
if (dbTransaction == null)
{
BeginTrans();
isTrans = false;
}
IEnumerable <T> entities = dbTransaction.Connection.Query <T>(new SQLinq <T>(EntityAttribute.GetTableName <T>()).Where(condition), null, true, CommandTimeout);
Update <T>(entities);
if (!isTrans)
{
return(Commit());
}
return(0);
}
public int Delete <T>(object keyValue) where T : class
{
T entity = dbTransaction.Connection.Query <T>(string.Format("select * from {0} where {1}=@primarykey", EntityAttribute.GetTableName <T>(), EntityAttribute.GetEntityKey <T>()), new { primarykey = keyValue }, null, true, CommandTimeout).FirstOrDefault();
return(Delete <T>(entity));
}
public int Delete <T>() where T : class
{
return(ExecuteBySql(DatabaseCommon.DeleteSql(EntityAttribute.GetTableName <T>()).ToString()));
}
