实体框架：使用列名和值检索数据

Question

If I use:

private List<string> GetDataFrom()
{
    var result = new List<string>();
    using (var context = new mainEntities())
    {
        var matches = context.data.Where(s => s.Width == 500).ToList();
        result.AddRange(matches.Select(t => t.Key));
    }
    return result;
}

It is giving me perfect results, but I want to use a method where I can use column name and value, like this:

private List<string> GetDataFrom(string columnName, int valToMatch)
{
    var result = new List<string>();
    using (var context = new mainEntities())
    {
        var propertyInfo = typeof(data).GetProperty(columnName).Name;
        var matches = context.data
                             .Where(p => p.propertyInfo == valToMatch);
        result.AddRange(matches.Select(t => t.Key));
    }
    return result;
}

This Method obviously doesn't work, so how can I do the same? I am using SqlLite, so some answers given do not apply. The whole problem is using propertyInfo the wrong way.

I tried various different approaches but no success.

This question is not a duplicate, because the suggested questions and their answers do not help much. I like this question to be reopened. I have found an answer myself I like to share.

Answer 1

ToString() method can not be translated into relevant SQL.

Try to use SqlFunctions.StringConvert(valToMatch) instead of valToMatch.ToString()

Answer 2

.ToString()

Doesn't works inside the Linq Query.

Inststed of .ToString() Function Use the following

SqlFunctions.StringConvert()

SEE THE FOLLOWING ANSWER https://stackoverflow.com/a/3292773/3736442