/// <summary>
/// 获取数据库实体的表名
/// </summary>
/// <returns></returns>
public string GetTableName <T>()
{
Type type = typeof(T);
string key = type.FullName + "_tableName";
//检查缓存是否存在
if (StringCacheUntil.ExitsKey(key))
{
return(StringCacheUntil.GetCache(key));
}
else
{
//获取特性
TableName tableNameAttr = type.GetCustomAttribute <TableName>();
string tableName;
if (tableNameAttr != null)
{
tableName = tableNameAttr._TableName;
}
else
{
tableName = type.Name;
}
//加入缓存
StringCacheUntil.AddCache(key, tableName);
return(tableName);
}
}
/// <summary>
/// 构造SQL参数化
/// </summary>
/// <param name="propertyInfos"></param>
/// <returns></returns>
public string BuildSqlParms <T>(PropertyInfo[] propertyInfos)
{
Type type = typeof(T);
string key = type.FullName + "sqlParms";
#region 缓存校验
if (StringCacheUntil.ExitsKey(key))
{
return(StringCacheUntil.GetCache(key));
}
#endregion
#region 拼接参数化
StringBuilder paramsSql = new StringBuilder();
paramsSql.Append("VALUES( ");
int size = propertyInfos.Length - 1;
for (int i = 0; i <= size; i++)
{
PropertyInfo property = propertyInfos[i];
//判断字段是否是自增主键，如果是自增主键直接跳过
TableId tableId = property.GetCustomAttribute <TableId>();
if (tableId != null)
{
if (tableId._idType == Enum.IdTypeEnum.AUTO)
{
continue;
}
}
//校验是否是表字段
TableFiled tableFiled = property.GetCustomAttribute <TableFiled>();
if (tableFiled != null)
{
if (!tableFiled.Exits)
{
continue;
}
}
if (i < size)
{
paramsSql.Append("@");
paramsSql.Append(property.Name);
paramsSql.Append(",");
}
else
{
paramsSql.Append("@");
paramsSql.Append(property.Name);
}
}
#endregion
//加入缓存
string res = paramsSql.ToString();
StringCacheUntil.AddCache(key, res);
return(res);
}
/// <summary>
/// 构造SQL字段
/// </summary>
/// <param name="propertyInfos">实体属性</param>
/// <returns></returns>
public string BuildSqlFiled <T>(PropertyInfo[] propertyInfos)
{
Type type = typeof(T);
string cacheKey = type.FullName + "_sqlFiled";
string idKey = type.FullName + "idType";
#region 缓存校验
if (StringCacheUntil.ExitsKey(cacheKey))
{
return(StringCacheUntil.GetCache(cacheKey));
}
#endregion
StringBuilder sqlFiled = new StringBuilder();
sqlFiled.Append("(");
int length = propertyInfos.Length - 1;
#region 拼接Sql
for (int i = 0; i <= length; i++)
{
PropertyInfo property = propertyInfos[i];
//判断字段是否是自增主键，如果是自增主键直接跳过
TableId tableId = property.GetCustomAttribute <TableId>();
if (tableId != null)
{
StringCacheUntil.AddCache(idKey, JsonConvert.SerializeObject(new KeyValuePair <string, IdTypeEnum>(property.Name, tableId._idType)));
if (tableId._idType == Enum.IdTypeEnum.AUTO)
{
continue;
}
}
TableFiled tableFiled = property.GetCustomAttribute <TableFiled>();
//最后一个字段不加,
if (i < length)
{
//如果不是数据库字段直接跳过
if (tableFiled != null)
{
if (!tableFiled.Exits)
{
continue;
}
sqlFiled.Append("`");
sqlFiled.Append(tableFiled.FiledName);
sqlFiled.Append("`");
sqlFiled.Append(",");
}
else
{
sqlFiled.Append("`");
sqlFiled.Append(property.Name);
sqlFiled.Append("`");
sqlFiled.Append(",");
}
}
else
{
//如果不是数据库字段直接跳过
if (tableFiled != null)
{
if (!tableFiled.Exits)
{
continue;
}
sqlFiled.Append("`");
sqlFiled.Append(tableFiled.FiledName);
sqlFiled.Append("`");
}
else
{
sqlFiled.Append("`");
sqlFiled.Append(property.Name);
sqlFiled.Append("`");
}
}
}
#endregion
sqlFiled.Append(")");
//加入缓存
string res = sqlFiled.ToString();
StringCacheUntil.AddCache(cacheKey, res);
return(res);
}
