C# – How to use a right click context menu on a DataGridView

cdatagridviewwinforms

I've created a context menu, and associated to my DataGridView control. However, I noticed that when I right click on the control, the selection in the dataGridView isn't changed. So I can't correctly fetch the row in the context's event handler.

Any suggestions on how I could accomplish this?

Imagine I have an ID olumn, and when I click the delete context menu, I want to delete that particular entry from the database.

I just need the information on how to get that id, I can handle the deleting myself.

Best Answer

    private void dataGridViewSource_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
    {
        if (e.Button != MouseButtons.Right || e.RowIndex == -1 || e.ColumnIndex == -1) return;
        dataGridViewSource.CurrentCell = dataGridViewSource.Rows[e.RowIndex].Cells[e.ColumnIndex];
        contextMenuStripGrid.Show(Cursor.Position);
    }

Related Solutions

C# – How to cast int to enum

From an int:

YourEnum foo = (YourEnum)yourInt;

From a string:

YourEnum foo = (YourEnum) Enum.Parse(typeof(YourEnum), yourString);

// The foo.ToString().Contains(",") check is necessary for enumerations marked with an [Flags] attribute
if (!Enum.IsDefined(typeof(YourEnum), foo) && !foo.ToString().Contains(","))
{
    throw new InvalidOperationException($"{yourString} is not an underlying value of the YourEnum enumeration.")
}

Update:

From number you can also

YourEnum foo = (YourEnum)Enum.ToObject(typeof(YourEnum) , yourInt);

C# – right click context menu for datagridview

You can use the CellMouseEnter and CellMouseLeave to track the row number that the mouse is currently hovering over.

Then use a ContextMenu object to display you popup menu, customised for the current row.

Here's a quick and dirty example of what I mean...

private void dataGridView1_MouseClick(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Right)
    {
        ContextMenu m = new ContextMenu();
        m.MenuItems.Add(new MenuItem("Cut"));
        m.MenuItems.Add(new MenuItem("Copy"));
        m.MenuItems.Add(new MenuItem("Paste"));

        int currentMouseOverRow = dataGridView1.HitTest(e.X,e.Y).RowIndex;

        if (currentMouseOverRow >= 0)
        {
            m.MenuItems.Add(new MenuItem(string.Format("Do something to row {0}", currentMouseOverRow.ToString())));
        }

        m.Show(dataGridView1, new Point(e.X, e.Y));

    }
}

Best Answer

Related Solutions

C# – How to cast int to enum

C# – right click context menu for datagridview

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