No row can be added to a datagridview control that does not have columns. Columns must be added first

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Guys, Need Help
I have two form one is to enter information and the second one is to show the data and transfer to first one. The second form has many buttons of Goods name when I choose one of button the data related to that button and transfer to first form that has datagridview that show the info of Goods.

when I run the program and the transfer is working perfect but when I close the first form and open again when I open second form and transfer data
**No row can be added to a DataGridView control that does not have columns. Columns must be added first**

Please I need help

What I have tried:

C#

private void GoodsButton_Click(object sender, EventArgs e)
        {
            if (Function.DataTable("SELECT * FROM TABLENAME").Rows.Count > 0)
            {
                foreach (DataRow DataRow in DataTable.Rows)
                {
                    Button Button = new Button();
                    Button.Tag = DataRow["C"].ToString();
                    Button.Text = DataRow["N"].ToString();
                    Button.Font = new Font("Times New Roman", 10f, FontStyle.Bold);
                    Button.UseVisualStyleBackColor = false;
                    Button.ForeColor = Color.White;
                    Button.BackColor = Color.Gray;
                    Button.Margin = new Padding(4);
                    Button.Top = i * 25;
                    Button.Size = new Size(200, 50);
                    Button.Click += GetItemInfo_Click;
                    this.FLPanel.Controls.Add(Button);
                }
            }
        }

C#

private void GetItemInfo_Click(object sender, EventArgs e)
        {
            Button ButtonSender = sender as Button;
            if (ButtonSender != null)
            {
                Function.DataTable("SELECT * FROM TABLENAME WHERE C='" + ButtonSender.Tag + "'");
                foreach (DataRow DataRow in DataTable.Rows)
                {
                        Form1.GETINFOFORM.DataGridView.Rows.Add(Info1, Info2, ..., Infon);
                }
            }
        }

Posted 28-Feb-21 5:43am

Karam Ibrahim

Updated 28-Feb-21 19:35pm

PIEBALDconsult

v2

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OriginalGriff · Accepted Answer · 2021-02-28T06:10:00

Don't do it like that.
Instead, let one form tell the other that data is available, and let it deal with it's own controls.

Exactly how depends on the "relationship" between the two forms.
Have a look at these, one of them will fit your circumstances.
The form that creates an instance of another:

C#

MyForm mf = new MyForm();
mf.Show();

Is the "parent", the other form is the "child".
(This doesn't imply any formal MDI relationship)

Transferring information between two forms, Part 1: Parent to Child[^]
Transferring information between two forms, Part 2: Child to Parent[^]
Transferring information between two forms, Part 3: Child to Child[^]

BillWoodruff · Accepted Answer · 2021-02-28T19:35:00

"when I close the first form and open again when I open second form and transfer data"

The simple solution may be to not close the first form, but use 'Hide so it stays active, clearing whatever is in the Form as necessary.

I say "may" because your question and code do not give me enough information to fully understand what you are doing.

A DataGridview is a strongly typed collection of Columns: they must be defined at design-time, or added in run-time code before you add Rows. CellType and CellTemplate should be set to avoid errors: [^]

In general, I would avoid creating a bunch of Controls in run-time code; I would try to re-use an existing Form with a TableLayoutPanel populated with the Controls

No row can be added to a datagridview control that does not have columns. Columns must be added first

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