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-// Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
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-//
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-// 本项目主要遵循 MIT 许可证和 Apache 许可证(版本 2.0)进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
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-//
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-// 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动!任何基于本项目二次开发而产生的一切法律纠纷和责任,我们不承担任何责任!
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-
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-namespace Admin.NET.Core;
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-
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-/// <summary>
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-/// Type 扩展
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-/// </summary>
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-public static class TypeExtension
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-{
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- /// <summary>
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- /// 根据指定Attribute获取属性
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- /// </summary>
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- /// <typeparam name="T"></typeparam>
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- /// <param name="type"></param>
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- /// <returns></returns>
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- public static List<string> GetPropertyNames<T>(this Type type)
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- where T : Attribute
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- {
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- var allProperties = type.GetProperties();
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-
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- var properties = allProperties.Where(x => x.CustomAttributes.Any(a => a.AttributeType == typeof(T)));
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-
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- return properties.Select(x => x.Name).ToList() ;
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- }
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-
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- /// <summary>
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- /// 获取查询表达式
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- /// </summary>
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- /// <param name="type"></param>
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- /// <param name="options"></param>
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- /// <param name="fieldName"></param>
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- /// <returns></returns>
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- public static LambdaExpression GetConditionExpression<T>(this Type type, List<T> options, string fieldName)
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- {
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- ParameterExpression parameter = Expression.Parameter(type, "c");
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- Expression right = Expression.Constant(false);
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- options.ForEach(option =>
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- {
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- Expression left = Expression.Equal(
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- Expression.Property(parameter, type.GetProperty(fieldName)),
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- Expression.Constant(option)
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- );
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- right = Expression.Or(left, right);
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- });
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- var finalExpression = Expression.Lambda(right, new ParameterExpression[] { parameter });
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- return finalExpression;
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- }
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-
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- /// <summary>
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- /// 获取查询表达式
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- /// </summary>
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- /// <typeparam name="T"></typeparam>
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- /// <param name="type"></param>
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- /// <param name="option"></param>
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- /// <param name="fieldName"></param>
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- /// <returns></returns>
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- public static LambdaExpression GetConditionExpression<T>(this Type type, T option, string fieldName)
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- {
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- ParameterExpression parameter = Expression.Parameter(type, "c");
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- Expression expression = Expression.Equal(
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- Expression.Property(parameter, type.GetProperty(fieldName)),
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- Expression.Constant(option)
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- );
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- var finalExpression = Expression.Lambda(expression, new ParameterExpression[] { parameter });
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- return finalExpression;
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- }
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-
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- /// <summary>
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- /// 获取查询表达式
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- /// </summary>
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- /// <typeparam name="T"></typeparam>
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- /// <param name="type"></param>
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- /// <param name="options"></param>
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- /// <param name="fieldNames"></param>
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- /// <returns></returns>
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- public static LambdaExpression GetConditionExpression<T>(this Type type,List<T> options,List<string> fieldNames)
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- {
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- ParameterExpression parameter = Expression.Parameter(type, "c");
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- Expression right = Expression.Constant(false);
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- fieldNames.ForEach(filedName =>
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- {
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- options.ForEach(option =>
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- {
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- Expression left = Expression.Equal(
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- Expression.Property(parameter, type.GetProperty(filedName)),
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- Expression.Constant(option)
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- );
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- right = Expression.Or(left, right);
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- });
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- });
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- var finalExpression = Expression.Lambda(right, new ParameterExpression[] { parameter });
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- return finalExpression;
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- }
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-
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- /// <summary>
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- /// 获取查询表达式
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- /// </summary>
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- /// <typeparam name="T"></typeparam>
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- /// <param name="type"></param>
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- /// <param name="option"></param>
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- /// <param name="fieldNames"></param>
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- /// <returns></returns>
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- public static LambdaExpression GetConditionExpression<T>(this Type type,T option,List<string> fieldNames)
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- {
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- ParameterExpression parameter = Expression.Parameter(type, "c");
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- Expression right = Expression.Constant(false);
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- fieldNames.ForEach(filedName =>
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- {
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- Expression left = Expression.Equal(
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- Expression.Property(parameter, type.GetProperty(filedName)),
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- Expression.Constant(option)
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- );
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- right = Expression.Or(left, right);
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- });
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- var finalExpression = Expression.Lambda(right, new ParameterExpression[] { parameter });
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- return finalExpression;
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- }
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-}
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