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How can I convert the following logic to LINQ?
Flaggedlist is a type of List<string>. request.flagged is a numeric value in a request POCO.
if (request.Flagged == 1)
{
if (!patient.UserFlaggedList.Contains(request.UserId))
{
flaggedList.Add(request.UserId);
}
}
else if (request.Flagged == 0)
{
string usrid = flaggedList.Where(a => a == request.UserId).FirstOrDefault<string>();
flaggedList.Remove(usrid);
}
It can be boiled down to two simple IF statements and the 2nd part shortened further still:
if (request.Flagged == 1 && !patient.UserFlaggedList.Contains(request.UserId))
flaggedList.Add(request.UserId);
if (request.Flagged == 0)
flaggedList.Remove(flaggedList.FirstOrDefault(a => a == request.UserId));
This is pretty condensed and clear, not sure why you'd want to make it more condensed.
If you really want to make it shorter, maybe you can do this:
if (request.Flagged == 1 && !patient.UserFlaggedList.Contains(request.UserId))
{
flaggedList.Add(request.UserId);
}
else if (request.Flagged == 0)
{
flaggedList.Remove(flaggedList.Where(a => a == request.UserId).FirstOrDefault<string>());
}
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Closed 5 years ago.
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I'm trying to write an if statement and i'm having trouble with my variables. it states operator > can not be applied to type int and string. code located below. both variables are displaying a int.
if (e.CmsData.Skill.InQueueInRing > "0")
{
Dispatcher.BeginInvoke(DispatcherPriority.Normal, (Action)(() => { callsWaitingData.Text = e.CmsData.Skill.InQueueInRing.ToString(); }));
callsWaitingData.Foreground = new SolidColorBrush(Colors.Red);
}
else if (e.CmsData.Skill.AgentsAvailable > "0")
{
Dispatcher.BeginInvoke(DispatcherPriority.Normal, (Action)(() => { callsWaitingData.Text = e.CmsData.Skill.AgentsAvailable.ToString(); }));
callsWaitingData.Foreground = new SolidColorBrush(Colors.Green);
}
else
{
callsWaitingData.Text = "0";
callsWaitingData.Foreground = new SolidColorBrush(Colors.Yellow);
}
This error couldn't really get much more descriptive.
operator > can not be applied to type int and string
if (e.CmsData.Skill.InQueueInRing > "0")
int -----^ ^--- string
Change it to
if (e.CmsData.Skill.InQueueInRing > 0)
Then both sides of the boolean logic is an int.
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I have a method that needs to convert a string to the generic type:
T GetValue<T>(string name)
{
string item = getstuff(name);
return item converted to T // ????????
}
T could be int or date.
you can use Convert.ChangeType
T GetValue<T>(string name)
{
string item = getstuff(name);
return (T)Convert.ChangeType(item, typeof(T));
}
if you need to limit input types only for int and DateTime, add condition like below
if (typeof(T) != typeof(int) && typeof(T) != typeof(DateTime))
{
// do something with other types
}
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How to optimize the following C# code?
public class SampleClass
{
public bool IsGreaterThenZero(int i)
{
if (i > 0)
return true;
else
return false;
}
}
Since binary comparison operators, such as >, <, and so on, produce a bool result, ou can return i>0 directly, like this:
public bool IsGreaterThenZero(int i) {
return i > 0;
}
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I'm stuck in a problem.
I have a class :
public class CustomerViewModel
{
public string Name;
public string[][] values;
public bool[] flag;
}
I wish to get count of rows in values[][] where row !=null
Assuming you already have:
var vm = new CustomerViewModel();
And have populated the values array, then..
For a count of non-null rows try:
var count = vm.values.Count(i => i != null);
Or for all rows where values[row][0] is not null:
var count = vm.values.Count(i => i != null && i.Length > 0 && i[0] != null);
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I have Json file in string (for example):
#{
"Url": "http://site.com/?q=windows8"
}
How can i take the information after ?q= on c# (windows 8). Sorry for my English.
You can use the querystring.
in Codebehind file
public String q
{
get
{
if (Request.QueryString["q"] == null)
return String.Empty;
return Convert.ToString(Request.QueryString["q"]);
}
}
then use the line below to get the value
var index = ('<%=q%>');
You can do simply this :
string s = "myURL/?q=windows8";
// Loop through all instances of ?q=
int i = 0;
while ((i = s.IndexOf("?q=", i)) != -1)
{
// Print out the substring. Here : windows8
Console.WriteLine(s.Substring(i));
// Increment the index.
i++;
}