Question

有没有办法将下面的两种方法合并到一个动态方法中，根据用户输入调用LINQ where子句中的相应属性？我想过做像

这样的事情

var prop = CultureInfo.CurrentCulture.TextInfo.ToTitleCase(name.ToLower()));

然后在LINQ x => x.{prop} == name 里面做这样的事情，不确定是否存在这样的语法

public void FilterByName(string name)
{
    var data = new InfoCollection().Data;
    var result = data.Where(x => x.State == name)        
    Console.WriteLine(result);
}

public void FilterByCar(string car)
{
    var data = new InfoCollection().Data;
    var result = data.Where(x=> x.Car == car) 
    Console.WriteLine(result);
}

switch(searchByString)
{
    case "name":
    FilterByName(name)
    break;

    case "car":
    FilterByCar(car)
    break;

    defualt:
    break;
}

Answer 1

尝试这样的事情

public void Filter(string column, string value)
{
    var data = new InfoCollection().Data;

    //get the column to filter
    PropertyInfo property = data[0].GetType().GetProperty(column);

    //filter getting dinamically the column
    var result = data.Where(x => property.GetValue(x, null) == value);

    Console.WriteLine(result);
}

动态变量在LINQ中调用适当的类属性

1 个答案: