Question

I have a project with a form with 3 tabs, each contains 1 datagridview. I disabled multiselect and can only select a row.

I need to Add new data rows or Modify rows of datas from these three datagrids, so I have a MenuStrip on top of the window with a menu with a “Add”, “Modify” and “Delete Selected Row” options.

How do I know which row is currently being selected in the current selected tab containing the datagrid which contains that row? Because there are 3 tabs containing 3 datagrids. I don’t want to get the output saying there are 3 datagridviews selected with whatever row was selecting. I want the one row on my screen.

Please ask me if my question isn’t clear enough.

Answer 1

I’m assuming that this question is about WinForms. Below there’s a schematic code logic sample for clicking a ToolStripMenuItem named Show selected row belonging to a MenuStrip on the form. Just adapt the method logic to your Modify and Delete buttons click events.

public Form1()
{
    InitializeComponent();

    dataGridView1.DataSource = new[] { new { Id = 1 }, new { Id = 10 } };
    dataGridView2.DataSource = new[] { new { Id = 2 }, new { Id = 20 } };
    dataGridView3.DataSource = new[] { new { Id = 3 }, new { Id = 30 } };
}

private void showSelectedRowToolStripMenuItem_Click(object sender, EventArgs e)
{
    var dgv = tabControl1.SelectedTab.Controls.OfType<DataGridView>().FirstOrDefault();
    if(dgv != null)
    {
        if (dgv.SelectedRows.Count > 0)
        {
            // I'm using MessageBox to show the index of the row. 
            // You should add your Modify / Delete logic
            MessageBox.Show(dgv.SelectedRows[0].Index.ToString());
        }
    }
}

For the .NET Framework 2.0, you can find the selected tab’s first DataGridView control, if existing, like this:

DataGridView dgv = null;
for (int i = 0; i < tabControl1.SelectedTab.Controls.Count; i++)
{
    if (tabControl1.SelectedTab.Controls[i].GetType() == typeof(DataGridView))
    {
        dgv = (DataGridView)tabControl1.SelectedTab.Controls[i];
    }
}