Parameter to lambda expression query

Question

public void display()
{
    var Charts = chartGroup.Descendants("charts").Elements("chart")
        .Where(x => x.Attribute("id").Value == "4")
        .Select(x => x.Attribute("name").Value).ToList();
}

I had written following lambda expression. As of now this works fine. But I want to set search value as user parameter ..something like

public void display(int userid)
{
    var Charts = chartGroup.Descendants("charts").Elements("chart")
        .Where(x => x.Attribute("id").Value == userid)
        .Select(x => x.Attribute("name").Value).ToList();
}

But it gives error. Please help out how to solve this?

How many guesses of the error do I get?

Simon Whitehead
– Simon Whitehead

2013-11-25 04:47:16 +00:00
Commented Nov 25, 2013 at 4:47 — Simon Whitehead
– Simon Whitehead, Commented Nov 25, 2013 at 4:47

King King · Accepted Answer · 2013-11-25 04:48:34Z

1

Comparing an int and a string makes no sense:

public void display(int userid) {
 var Charts = chartGroup.Descendants("charts")
                        .Elements("chart")
                        .Where(x =>  x.Attribute("id").Value == userid.ToString())
                        .Select(x => x.Attribute("name").Value).ToList();
}

answered Nov 25, 2013 at 4:48

King King

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Comments

Sid · Accepted Answer · 2013-11-25 04:54:03Z

0

Search pattern has to be string but you are passing as int. So convert it ToString() .

 var Charts = 
            chartGroup.Descendants("charts").Elements("chart").
            Where(x => x.Attribute("id").Value == userid.ToString()).
            Select(x => x.Attribute("name").Value).ToList();

answered Nov 25, 2013 at 4:54

Sid

3172 silver badges17 bronze badges

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