需要一个事件处理程序来处理与另一个动态添加的控件交互的动态添加的控件

Question

I need a dynamically added label with a click event to add a row to a dynamically added datagridview. I know how to get an event handler to work with a dynamically added label but I am not sure how to get it to work with the datagridview as well.

I have tried adding a datagridview parameter to the event handler but this is not working for me.

Code to create datagridview and link labels.

foreach (DataRow rows in dtbl.Rows)
            {

                // Create Datagridview
                DataGridView datagridview = new DataGridView();

                // Create link labels
                LinkLabel linkLabel = new LinkLabel();

                // Add event handler to the link labels
                linkLabel.Click += new EventHandler(this.linkLabel_Click); 

                this.Controls.Add(datagridview);
                this.Controls.Add(linkLabel);
            }

// Event handler 

  private void linkLabel_Click(object sender, EventArgs e)
        {
            // This doesnt work because "datagridview" doesnt exist, but I just have no idea how to get this to interact with the dynamically created datagridviews.


            int rowIndex = datagridview.Rows.Add();
            DataGridViewRow row = datagridview.Rows[rowIndex];
            row.Cells[0].Value = "5";
            datagridview.CurrentCell = row.Cells[0];
        }


I expect each link label to add a new row to the datagridview it was created with in the for loop. But I just don't how to code it.

Answer 1

In your foreach loop where you create the LinkLabel and DataGridView , you can assign a reference of the DataGridView to LinkLabel -- Assuming you are doing this in Windows Form or WPF, you can make use of the control's Tag property:

linkLabel.Tag = datagridView;

Then, in your click event, get the reference:

LinkLabel linkLabel = (LinkLabel)sender;
DataGridView datagridView = (DataGridView)linkLabel.Tag;