C#基础 Lambda
标签：ble blog and ssi code any using query lam
原文：https://www.cnblogs.com/Lau7/p/5451985.html
扩展类
public static class ExpressionExt
{
public static Expression> And(this?Expression> expr1, Expression> expr2)
{
return Expression.Lambda>(Expression.AndAlso(expr1.Body, expr2.Body), expr1.Parameters);
}
public static Expression> Or(this?Expression> expr1,Expression> expr2)
{
return Expression.Lambda>(Expression.OrElse(expr1.Body, expr2.Body), expr1.Parameters);
}
}
使用示例
Expression> exp1 = s => s.UserName.Contains("1") && s.Age > 0;
Expression> exp2 =exp1.And( s => s.IsEnable == 1);
using (var context = new DbContext().ConnectionString(connString))
{
var result1 = context.Select(exp1).QueryMany();
var result2 = context.Select(exp2).QueryMany();
}
C#基础 Lambda
标签：ble blog and ssi code any using query lam
原文地址：https://www.cnblogs.com/guxingy/p/13207203.html
评论