(更新时间)2021年5月19日 仓库温控系统(Winform) 04 获取特性值的扩展方法AttributeHelper
【摘要】
public static class AttributeHelper
{
/// <summary>
/// 获取映射表名
/// </summary>
...
public static class AttributeHelper
{
/// <summary>
/// 获取映射表名
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static string GetTName(this Type type)
{
string tableName = string.Empty;
//获取指定类型的自定义特性
object[] attrs = type.GetCustomAttributes(false);
foreach (var attr in attrs)
{
if(attr is TableAttribute)
{
TableAttribute tableAttribute = attr as TableAttribute;
tableName = tableAttribute.TableName;
}
}
if(string.IsNullOrEmpty(tableName))
{
tableName = type.Name;
}
return tableName;
}
/// <summary>
/// 获取映射列名
/// </summary>
/// <param name="property"></param>
/// <returns></returns>
public static string GetColName(this PropertyInfo property)
{
string columnName = string.Empty;
//获取指定类型的自定义特性
object[] attrs = property.GetCustomAttributes(false);
foreach (var attr in attrs)
{
if(attr is ColumnAttribute)
{
ColumnAttribute colAttr = attr as ColumnAttribute;
columnName = colAttr.ColumnName;
}
}
if(string.IsNullOrEmpty(columnName))
{
columnName = property.Name;
}
return columnName;
}
/// <summary>
/// 判断主键是否自增
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static bool IsIncrement(this Type type)
{
//获取指定类型的自定义特性
object[] attributes = type.GetCustomAttributes(false);
foreach (var attr in attributes)
{
if (attr is PrimaryKeyAttribute)
{
PrimaryKeyAttribute primaryKeyAttr = attr as PrimaryKeyAttribute;
return primaryKeyAttr.autoIncrement;
}
}
return false;
}
///<summary>
/// 获取主键名
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static string GetPrimary(this Type type)
{
object[] attributes = type.GetCustomAttributes(false);
foreach (var attr in attributes)
{
if (attr is PrimaryKeyAttribute)
{
PrimaryKeyAttribute primaryKeyAttr = attr as PrimaryKeyAttribute;
return primaryKeyAttr.PrimaryKey;
}
}
return null;
}
/// <summary>
/// 判断属性是否为主键
/// </summary>
/// <param name="type"></param>
/// <param name="property"></param>
/// <returns></returns>
public static bool IsPrimary(this Type type, PropertyInfo property)
{
//获取主键名
string primaryKeyName = type.GetPrimary();
//获取指定属性的映射列名
string columnName = property.GetColName();
//判断是否相等
return (primaryKeyName == columnName);
}
}
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文章来源: codeboy.blog.csdn.net,作者:愚公搬代码,版权归原作者所有,如需转载,请联系作者。
原文链接:codeboy.blog.csdn.net/article/details/117046610
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