There is no argument given that corresponds to the required formal parameter

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There is no argument given that corresponds to the required formal parameter 'Notes' of 'Form1.CreateNote(Note)

This is the problem I are experiencing!
I must fill parameter how !
Sorry ! I don't know describe how problem is !

What I have tried:

This is code

C#

<pre> if (reuslt == DialogResult.Yes)
            {
                try
                {
                    if (txt_note != null)
                    {
                        txt_mahs.Enabled = false;
                        CreateNote(); // <== Error 
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                }
            }
        }
        private void CreateNote(Note Notes )
        { // tạo ghi chú -----------
            var check = _en.Notes.Where(p => p.MaTL == (txt_mahs.Text)).FirstOrDefault();
            if(check != null )
            {
                DialogResult result;
                result = MessageBox.Show("Mã này đã được ghi chú ! Bạn có muốn sửa bản ghi chú ?","Warning !!!", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (result == DialogResult.No)
                {
                    return;
                }

Posted 6-Jan-21 16:23pm

Huyyhaha

Updated 6-Jan-21 19:48pm

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Comments

Richard MacCutchan 7-Jan-21 5:07am

But surely you wrote the code?

Huyyhaha 12-Jan-21 3:21am

yes! i wrote it.

Richard MacCutchan 12-Jan-21 4:31am

Then you know how to fix it.

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OriginalGriff · Accepted Answer · 2021-01-06T19:48:00

Look at the error message:

There is no argument given that corresponds to the required formal parameter 'Notes' of 'Form1.CreateNote(Note)

Then look at the code that generates the error:

CreateNote(); // <== Error

What it is saying is pretty clear: the Form1 method called "CreateNote" is defined as requiring a parameter called "Note".
You are trying to call it without passing it anything to Create.

Start by looking at the method definition, and work out what exactly you are supposed to pass it. Then come back to the line that generates the error and add the parameter data!

We can't do that for you - we have no idea what type Note should be, and no way to see the method definition to find out!

And since this is called CreateNote, then is a good chance it should return something like a new Note class instance - so you probably want to use its return value when you call it as well.