如何通过从树节点中选择一个节点来从数据网格中删除一行？

Question

Iam entering data in datagridview in c# when i draw a rectangle on picturebox, i have an array where i store the rectangle data, whenever i enter a new row, i also create a new childnode in treeview. Now i want to delete a row in datagridview by selecting the corresponding treenode. But my code is not working properly. I mostly get out of range exception errors.

Please help me fix this?

This is my code to delete the row:

         int pos = (int) treeView1.SelectedNode.Tag;
         
            if (treeView1.SelectedNode.Name.Contains("Code"))
            {
                if (pos == 0)
                {
                    MessageBox.Show("Cannot delete 1st node");
                }

                else
                {
                    treeView1.SelectedNode.Remove();

                    for (int i = pos; i < rectincr; i++)
                    {
                        PB1CodeRect[i] = PB1CodeRect[i + 1]; //delete rectangle with row and node
                        dataGridView2.Rows[i].Tag = pos;
                        dataGridView2.Rows[poss].Selected = true;

                        foreach (DataGridViewRow item in this.dataGridView2.SelectedRows)
                        {
                            dataGridView2.Rows.RemoveAt(item.Index); //delete dgvrow
                        }
                    }
                  
                   
                }

And this is the part of code where dgv and node is inserted.

       {
       PB1CodeRect[pb1Coderectincr] = new Rectangle(Convert.ToInt32(cibcam1.SelectionRegion.X), Convert.ToInt32(cibcam1.SelectionRegion.Y), Convert.ToInt32(cibcam1.SelectionRegion.Width), Convert.ToInt32(cibcam1.SelectionRegion.Height));
            pb1Coderectincr++;
            this.dataGridView2.Rows.Add(pb1Coderectincr, tabControl2.SelectedTab.Text, "2dCode - " + cibcam1.SelectionRegion.X + "," + cibcam1.SelectionRegion.Y + "," + cibcam1.SelectionRegion.Width + "," + cibcam1.SelectionRegion.Height,0);

            codenodcam1.Name = "Code ROI-" + pb1Coderectincr;
            codenodcam1.Text = "Code ROI-" + pb1Coderectincr;
            codenodcam1.Tag = pb1Coderectincr + 1;
           //var dict = (Dictionary<int, int>)codenodcam1.Nodes[0].Tag;
           // dict[pb1Coderectincr] = pb1Coderectincr;
            mainNode.Nodes.Add(codenodcam1);
            mainNode.ExpandAll();
           }

Answer 1

I found the solution.

In reply to JohnG's questions - im building an image processing application where I draw an ROI, the roi rectangle coordinates are saved in the PBRect[] array because there would be multiple rectangles. Each rectangle's coordinates, index, inspection result are stored in a row of DGV. The treeview is to allow the user easy access to manipulate ROI size, delete roi etc. The DGV is hidden from user view.

I made the mistake of adding pb1Coderectincr++ before i updated values, so the increment has to be the last one.

I also updated the DGV index value once a node, rect and row has been deleted so the index is not messed up. Here is the working code to delete node, row and rectangle:

       int pos = (int)treeView1.SelectedNode.Index;
       if (pos == 0)
                {
                    MessageBox.Show("Cannot delete 1st node");
                }
                else
                {
                    treeView1.SelectedNode.Remove(); //delete node
                    for (int i = pos; i < pb1Coderectincr; i++) //delete rectangle
                    {
                        PB1CodeRect[i] = PB1CodeRect[i + 1];
                    }
                    dataGridView2.Rows[pos].Selected = true;
                    foreach (DataGridViewRow item in this.dataGridView2.SelectedRows) //delete dgv row
                    {
                        dataGridView2.Rows.RemoveAt(item.Index);
                        if (!item.IsNewRow) // update index
                        {
                            item.Cells[0].Value = item.Index + 1;
                        }
                    }
                    treeView1.Focus();
                }