Cannot Assign because it is a method group C#?

Question

Getting the error

Cannot Assign "AppendText" because it is a "method group".

public partial class Form1 : Form
{
    String text = "";

    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        String inches = textBox1.Text;
        text = ConvertToFeet(inches) + ConvertToYards(inches);
        textBox2.AppendText = text;
    }

    private String ConvertToFeet(String inches)
    {
        int feet = Convert.ToInt32(inches) / 12;
        int leftoverInches = Convert.ToInt32(inches) % 12;
        return (feet + " feet and " + leftoverInches + " inches." + " \n");
    }

    private String ConvertToYards(String inches)
    {
        int yards = Convert.ToInt32(inches) / 36;
        int feet = (Convert.ToInt32(inches) - yards * 36) / 12;
        int leftoverInches = Convert.ToInt32(inches) % 12;
        return (yards + " yards and " + feet + " feet, and " + leftoverInches + " inches.");
    }
}

The error is on the line

textBox2.AppendText = text;

inside the button1_Click() method.

Uh I tried it and it worked but for some reason, it won't display it in a new line. — puretppc, Commented Nov 4, 2013 at 16:55
Does the textbox have MultiLine = True? Also if one of the people below does answer your question, please accept their answer by clicking the tick next to it — Basic, Commented Nov 4, 2013 at 16:58
Yeah I set the properties to true but it still didn't work. :( — puretppc, Commented Nov 4, 2013 at 17:00
Add a new line after the text to be appended: textBox2.AppendText(text + Environment.NewLine); — Idle_Mind, Commented Nov 4, 2013 at 17:00

Tilak · Accepted Answer · 2013-11-04 16:41:34Z

37

Use following

textBox2.AppendText(text);

Instead of

textBox2.AppendText = text;

AppendText is not a property but a method. Thus it needs to be invoked with parameter and cannot be assigned directly.

Properties are special methods, that support assignments due to special handling in compiler.

answered Nov 4, 2013 at 16:41

Tilak

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Mansfield · Accepted Answer · 2013-11-04 16:41:13Z

6

Do this instead (AppendText is a method, not a property; which is exactly what the error message is telling you):

textBox2.AppendText(text);

answered Nov 4, 2013 at 16:41

Mansfield

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P.Brian.Mackey · Accepted Answer · 2013-11-04 16:41:21Z

5

textBox2.AppendText(text); is a method. You have to call it like one. You were performing an assignment operation on a method.

answered Nov 4, 2013 at 16:41

P.Brian.Mackey

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Stefano Bafaro · Accepted Answer · 2013-11-04 16:42:29Z

5

You have to call the AppendText in this way:

textBox1.AppendText("Some text")

answered Nov 4, 2013 at 16:42

Stefano Bafaro

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Bogdan Beda · Accepted Answer · 2013-11-04 16:42:49Z

5

AppendText is a method and you must call it.

textBox2.AppendText(text);

answered Nov 4, 2013 at 16:42

Bogdan Beda

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Yunnosch · Accepted Answer · 2019-12-08 22:58:01Z

1

I figured out that the variable name declared was similar to a method name and hence it didn't allow me to assign a value.
The moment I changed the name it worked!

edited Dec 8, 2019 at 22:58

Yunnosch

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answered Dec 8, 2019 at 22:54

P-Man-Coding

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This seems to focused on your own environment and situation. Please rephrase to turn this into an asnwer which is more generally helpful to others.
– Yunnosch
Commented Dec 8, 2019 at 22:57
1

I disagree with the comment above. Just because the solution solves a rarer error than the absolute most common error that any programmer will ever encounter, that doesn't make it value-less. What would make SO value-less if the only questions allowed are those that are related to just a small handful of the most common problems people encounter. SO has much more value when you can find solutions to EVERY problem someone runs into, not just the few that you have in the front of your mind.
– Bryan Williams
Commented Sep 14, 2021 at 16:04
It certainly helped me! Thank you @prattek!
– Sotiris Zegiannis
Commented May 30, 2022 at 12:08

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