ERORR: non-invocable member 'data.table.rows cannot be used like a method.

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I am trying to get data from database table SQL to Textbox in the form (copmany) . I create class for the form contain a function to get the max value of row in the table

C#

//  class COMPCLS 
 public DataTable MaxNEW()
            {
                var DAL = new SQlcls.DataAccessLayer();

                var DT = new DataTable();
                DT = DAL.SelectData_txt("SELECT ISNULL(MAX (ID)+1,1) FROM [dbo].[company]", default);
                return DT;
            }

. then in the form (company) i create :

C#

//FRM_COMPANY
 public void MAX_NEW()
        {
            COMPCLS cmp = new COMPCLS();
            var DT = new DataTable();
            DT = cmp.MaxNEW();
            if (DT.Rows.Count > 0)
            {
                TXT_ID.Text = DT.Rows(0)(0).ToString();
                
            }

        }

it shows the error "

Non-invocable member 'Data.Table.Rows cannot be used like a method.

What I have tried:

I try search but I cannot get the answer

Posted 2-Sep-22 2:59am

mohamed thrwat

Updated 2-Sep-22 3:22am

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3 solutions

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Richard MacCutchan · Accepted Answer · 2022-09-02T03:20:00

Solution 1

Indexing in C# is by using square brackets, not parentheses:

C#

                TXT_ID.Text = DT.Rows(0)(0).ToString();

// should be
                TXT_ID.Text = DT.Rows[0][0].ToString();

Posted 2-Sep-22 3:20am

Richard MacCutchan

Comments

mohamed thrwat 2-Sep-22 9:27am

thank for help .. i am new with c#

Richard MacCutchan 2-Sep-22 9:43am

You are welcome. But your code does not appear to be written by someone new. Or maybe you are moving from VB.NET to C#.

mohamed thrwat 2-Sep-22 14:28pm

that is right i am moving to c# from vb.net but also not a master at vb.net :(

CPallini · Accepted Answer · 2022-09-02T03:21:00

Solution 2

Replace

Quote:
TXT_ID.Text = DT.Rows(0)(0).ToString();

With

C#

TXT_ID.Text = DT.Rows[0][0].ToString();

(square brackets instead of round ones).

Posted 2-Sep-22 3:21am

CPallini

Comments

mohamed thrwat 2-Sep-22 9:27am

thank for help .. i am new with c#

CPallini 2-Sep-22 9:38am

You are welcome.

OriginalGriff · Accepted Answer · 2022-09-02T03:22:00

Solution 3

Indexes need square brackets, not round:

C#

TXT_ID.Text = DT.Rows(0)(0).ToString();

Should be

C#

TXT_ID.Text = DT.Rows[0][0].ToString();

Posted 2-Sep-22 3:22am

OriginalGriff

Comments

mohamed thrwat 2-Sep-22 9:27am

thank for help .. i am new with c#

OriginalGriff 2-Sep-22 9:32am

You're welcome!