How to declare string variable with Location definition in c# winForm?

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1.00/5 (2 votes)

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C#

string labelName = "lblCity";

lblAmtInWords is label name which i given in label properties..

C#

lblAmtInWords.Location = new Point(lblAmtInWords.Location.X, 238);
lblAmtInWords.Location = new Point(lblAmtInWords.Location.Y, 684);

i want to pass the lblCity instead of lblAmtInWords

C#

lblCity.Location = new Point(Convert.ToInt32(split1[i + 1]), Convert.ToInt32(split1[i + 2]));

getting error like this...

error:'string' does not contain a definition for 'Location' and no extension method 'Location' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

Posted 8-Jan-16 1:52am

Sathish km

Updated 8-Jan-16 5:20am

Maciej Los

v2

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Sergey Alexandrovich Kryukov 8-Jan-16 12:41pm

The question makes no sense. You got a message
'string' does not contain a definition for 'Location'

It does not mean you should ask how to declare a string with 'Location'. This is wrong thinking. All explanations are useless until you learn how to use some logic.

—SA

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CPallini · Answer 1 · 2016-01-08T02:07:00

Solution 1

I would use a Dictionary<String, Label> for the purpose, e.g.

C#

Dictionary<String, Label> labelByName = new Dictionary<string, Label>();
labelByName.Add("price", lblPrice);
labelByName["price"].Text = "Please specify the price";

Posted 8-Jan-16 2:07am

CPallini

Comments

Maciej Los 8-Jan-16 15:34pm

Sounds reasonable. 5!

CPallini 8-Jan-16 16:06pm

Thank you!.

OriginalGriff · Answer 2 · 2016-01-08T02:09:00

Solution 2

If you want to pass a label, then pass a label: a string does not have a Location property because it's not a displayable item - only Control based classes are.

You can pass a label to a method very easily:

C#

public void MyMethod(Label lab, string str, Point p)
   {
   lab.Location = p;
   lab.Text = str;
   }
...
   MyMethod(myLabelToTamperWith, "Some text", new Point(100,100));

But if you are trying to pass the name of a variable which refers to a label then it gets much more complex, and you have to faff about with Reflection or similar depending on your environment. Normally, it's a sign you have made something far more complicated than it needs to be! :laugh:

Posted 8-Jan-16 2:09am

OriginalGriff

Comments

Sathish km 8-Jan-16 8:36am

for (int i = 0; i < split1.Count(); i += 3)
{
Label LabelName = new Label();
LabelName.Name = split1[i].ToString();

//lblVoucherNo.Location.
lblVoucherNo.Location = new Point(Convert.ToInt32(split1[i + 1]), Convert.ToInt32(split1[i + 2]));

MyMethod(LabelName, new Point(Convert.ToInt32(split1[i + 1]), Convert.ToInt32(split1[i + 2])));
}

public void MyMethod(Label lab, Point p)
{
lab.Location = p;
//lab.Text = str;
}

i want to pass LabelName.Name to lab.Location instead of lab...

OriginalGriff 8-Jan-16 8:48am

Why?
As I said, it's normally an indication that you have done something wrong in your design!
Why do you think you need to do this?

Sathish km 8-Jan-16 8:54am

want to pass assign name of all control to lab.Location from LabelName.Name = split1[i].ToString();

if LabelName.Name is "a" or "b" or "c" pass it to lab.location (name)

OriginalGriff 8-Jan-16 9:08am

Yes, I kinda guessed that...but why?
The name of a variable is not the Control itself, it's a memory location that holds a reference to the control, is all.
It looks like you've painted yourself into a corner, and think this is the best way out - when frequently all you are doing is making life a lot harder for yourself. Why do you need this, particularly since you don't seem to have been coding very long?

Sathish km 8-Jan-16 9:14am

i want to assign location to many controls so i don't want it assign as multiple line code. i need to assign in single line code....

OriginalGriff 8-Jan-16 9:28am

Then set up an array of Labels and loop through that instead of the names - which is trivial to do - or loop through the form Controls collection looking for Label values. Using names complicates it a lot (and slows it down, reflection is not quick)