Button clik controls C#

I use dinamycal button and add TableLayoutPanel on button
Now need to use labels from that Table layout on my button
My code for button click

void btn_Click(object sender, EventArgs e)
       {

           Button btn = (Button)sender;
           Label Label = (Label)sender;
// here need to use priceLabel and nameLabel

           var itemAndPrice = btn.Text;
           var item = Label.Text;

           int sno = dataGridView1.Rows.Count + 1;
           string nazivartikla = item[0].ToString();
           string exists = "";

           foreach (DataGridViewRow g1 in dataGridView1.Rows)
           {
               if (g1.Cells[2].Value.ToString().Trim() == item[0].ToString().Trim())
               {
                   exists = "y";
                   g1.Cells[3].Value = Convert.ToInt32(g1.Cells[3].Value) + 1;
               }
           }

           if (exists != "y")
           {
               dataGridView1.Rows.Add(sno, SifraTextBox.Text, nazivartikla, 1);
           }

           dataGridView1.Refresh();

       }

This part of code is ok

  private void TopliNapitciButton_Click(object sender, EventArgs e)
        {


            panel1.Controls.Clear();

            string conString = ConnectionClass.PullData(labelgodina.Text);
            SqlConnection con = new SqlConnection(conString);
            SqlCommand cmd = new SqlCommand("SELECT naziv, FORMAT(cijena_sa_porezom, 'N2') AS cijena, data FROM dbo.roba_usluge where grupa_artikala='Napitci' and status='Aktivan'", con);
            // SqlCommand cmd = new SqlCommand("SELECT naziv+' - '+CAST(FORMAT(cijena_sa_porezom, 'N2') AS varchar), data FROM dbo.roba_usluge where grupa_artikala='Napitci' and status='Aktivan'", con);

            var da = new SqlDataAdapter(cmd);
            var ItemTable = new DataTable();
            da.Fill(ItemTable);

            con.Open();
            Int32 count = ItemTable.Rows.Count;
            con.Close();

            int top = 190;
            int left = 5;
            for (int i = 0; i < count; i++)
            {
                Button button = new Button();
                button.Size = new Size(128, 158);
                button.BackColor = Color.Transparent;
                button.FlatAppearance.BorderSize = 0;
                button.Font = new System.Drawing.Font("Roboto", 10);
                button.TextAlign = ContentAlignment.BottomCenter;
                button.BackgroundImageLayout = ImageLayout.Zoom;

                // Create TableLayoutPanel
                TableLayoutPanel table = new TableLayoutPanel();
                table.Dock = DockStyle.Fill;
                table.RowCount = 3;
                table.RowStyles.Add(new RowStyle(SizeType.Percent, 70F));
                table.RowStyles.Add(new RowStyle(SizeType.Percent, 15F));
                table.RowStyles.Add(new RowStyle(SizeType.Percent, 15F));

                // Image
                PictureBox pictureBox = new PictureBox();
                pictureBox.Dock = DockStyle.Fill;
                pictureBox.SizeMode = PictureBoxSizeMode.StretchImage;

                if (ItemTable.Rows[i]["data"] != DBNull.Value)
                {
                    byte[] _byte = (byte[])ItemTable.Rows[i]["data"];
                    MemoryStream ms = new MemoryStream(_byte);
                    pictureBox.Image = Image.FromStream(ms);
                }

                // Label for name
                Label nameLabel = new Label();
                nameLabel.Dock = DockStyle.Fill;
                nameLabel.TextAlign = ContentAlignment.MiddleCenter;
                nameLabel.Font = new System.Drawing.Font("Roboto", 12, FontStyle.Bold);
                nameLabel.ForeColor = System.Drawing.Color.Gray;
                nameLabel.Text = ItemTable.Rows[i]["naziv"].ToString();

                // Label for price
                Label priceLabel = new Label();
                priceLabel.Dock = DockStyle.Fill;
                priceLabel.TextAlign = ContentAlignment.MiddleCenter;
                priceLabel.ForeColor = System.Drawing.Color.DarkOrange;
                priceLabel.Font = new System.Drawing.Font("Roboto", 12, FontStyle.Bold);
                priceLabel.Text = ItemTable.Rows[i]["cijena"].ToString() + " KM";

                // Add controls to TableLayoutPanel
                table.Controls.Add(pictureBox, 0, 0);
                table.Controls.Add(nameLabel, 0, 1);
                table.Controls.Add(priceLabel, 0, 2);

                button.Left = left;
                button.Top = top;


                // Add TableLayoutPanel to button
                button.Controls.Add(table);

                button.Click += new EventHandler(this.btn_Click);

                panel1.Controls.Add(button);

                if ((i + 1) % 4 == 0)
                {
                    left = 5;
                    top += button.Height + 2;
                }
                else
                {
                    left += button.Width + 2;
                }
            }

It seems like you want to access the nameLabel and priceLabel in your button click event. However, in your current code, you’re trying to cast the sender (which is a Button) to a Label, which will not work and will throw an InvalidCastException.

To solve this, you can use the Tag property of the Button to store a reference to the labels. When you create your buttons and labels, you can store the labels in an array or a tuple and assign it to the Tag property of the button:

// Create labels
Label nameLabel = new Label();
Label priceLabel = new Label();

// Assign labels to button's Tag property
button.Tag = new[] { nameLabel, priceLabel };

Then, in your button click event, you can retrieve the labels from the Tag property:

void btn_Click(object sender, EventArgs e)
{
    Button btn = (Button)sender;
    Label[] labels = (Label[])btn.Tag;

    // Access the labels
    Label nameLabel = labels[0];
    Label priceLabel = labels[1];

    // Now you can use nameLabel and priceLabel
    var itemName = nameLabel.Text;
    var itemPrice = priceLabel.Text;

    // Rest of your code...
}

This way, each button carries a reference to its associated labels, and you can access them in the button click event. Remember to replace the placeholder code with your actual label creation code.

Thanks

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Naimish Makwana2y ago
It seems like you want to access the nameLabel and priceLabel in your button click event. However, in your current code, you’re trying to cast the sender (which is a Button) to a Label, which will not work and will throw an InvalidCastException.

To solve this, you can use the Tag property of the Button to store a reference to the labels. When you create your buttons and labels, you can store the labels in an array or a tuple and assign it to the Tag property of the button:
```
// Create labels
Label nameLabel = new Label();
Label priceLabel = new Label();

// Assign labels to button's Tag property
button.Tag = new[] { nameLabel, priceLabel };
```
Then, in your button click event, you can retrieve the labels from the Tag property:
```
void btn_Click(object sender, EventArgs e)
{
    Button btn = (Button)sender;
    Label[] labels = (Label[])btn.Tag;

    // Access the labels
    Label nameLabel = labels[0];
    Label priceLabel = labels[1];

    // Now you can use nameLabel and priceLabel
    var itemName = nameLabel.Text;
    var itemPrice = priceLabel.Text;

    // Rest of your code...
}
```
This way, each button carries a reference to its associated labels, and you can access them in the button click event. Remember to replace the placeholder code with your actual label creation code.

Thanks