/// <summary>
/// 转换为为强类型
/// </summary>
/// <param name="type"></param>
/// <param name="value"></param>
/// <returns></returns>
internal static object ConvertObject(Type type, object value)
{
if (value == null)
{
return(value);
}
if (type == value.GetType())
{
return(value);
}
if (convertMethod.Count == 0)
{
convertMethod.TryAdd(typeof(byte[]), (a) =>
{
return((byte[])a);
});
convertMethod.TryAdd(typeof(Guid), (a) =>
{
return(new Guid(a.ToString()));
});
//convertMethod.Add(typeof(Enum), (a) =>
//{
// return Convert.ToInt32(a);
//});
}
if (type.IsEnum)
{
type = type.GetEnumUnderlyingType();
}
if (convertMethod.ContainsKey(type))
{
return(convertMethod[type](value));
}
if (Nullable.GetUnderlyingType(type) != null)
{
//Nullable<T> 可空属性
type = type.GenericTypeArguments[0];
}
try
{
return(Convert.ChangeType(value, type));
}
catch
{
return(null);
}
}
/// <summary>
/// 转化值,并处理默认值
/// </summary>
/// <param name="value"></param>
/// <param name="type"></param>
/// <returns></returns>
public static object CheckNullValue(object value, Type type = null)
{
if (type == null && value == null)
{
return(DBNull.Value);
//throw new CRLException("至少一项不能为空");
}
if (value != null)
{
type = value.GetType();
}
if (nullCheckMethod.Count == 0)
{
nullCheckMethod.TryAdd(typeof(bool), (a) =>
{
return(Convert.ToInt32(a));
});
nullCheckMethod.TryAdd(typeof(string), (a) =>
{
return(a + "");
});
nullCheckMethod.TryAdd(typeof(Enum), (a) =>
{
return(Convert.ToInt32(a));
});
nullCheckMethod.TryAdd(typeof(DateTime), (a) =>
{
DateTime time = (DateTime)a;
if (time.Year == 1)
{
a = DateTime.Now;
}
return(a);
});
nullCheckMethod.TryAdd(typeof(byte[]), (a) =>
{
if (a == null)
{
return(0);
}
return(a);
});
nullCheckMethod.TryAdd(typeof(Guid), (a) =>
{
if (a == null)
{
return(Guid.NewGuid().ToString());
}
return(a);
});
}
if (nullCheckMethod.ContainsKey(type))
{
return(nullCheckMethod[type](value));
}
if (type.BaseType == typeof(Enum))
{
return(nullCheckMethod[type.BaseType](value));
}
if (value == null)
{
return(DBNull.Value);
}
return(value);
}