[RESOLVED] Delete row from Table Panel Layout?

Using the code below I manage to remove all the controls from my rows but the rows themselves dont get deleted... any help?

Code:

---

if (tblPnl.RowCount > 1)
{
                for (int i = 1; i < tblPnl.RowCount; i++) // Starting at i=1 so that the first row never gets deleted
                {
                    tblPnl.Controls.RemoveAt(i);
                }
}

---

You have to manually re-creat the entire TableLayoutPanel. For some reason Microsoft in their infinite wisdom never thought that people when removing a row, they actually would want the row to go away.

Here is a class that I have written that can do this for you.

Code:

---


    public class MultiRowPanel
        : Panel
    {
        int suspended = 0;
        public void SuspendTableDraw()
        {
            suspended++;
        }

        public void ResumeTableDraw()
        {
            suspended = Math.Max(0, suspended--);
            if (suspended==0)
                ReDrawTable();
        }

        public void ClearRows()
        {
            this.innerctrls.Clear();
            ReDrawTable();
        }

        public void RemoveRow(Control c)
        {
            innerctrls.Remove(c);
            ReDrawTable();
        }

        public void AddRows(Control[] controls)
        {
            foreach (Control c in controls)
            {
                if (innerctrls.Contains(c))
                    throw new Exception("The control already exists in the table.");
                innerctrls.Add(c);
            }
            ReDrawTable();
        }

        public void AddRow(Control control)
        {
            if (innerctrls.Contains(control))
                throw new Exception("The control already exists in the table.");
            this.innerctrls.Add(control);
            ReDrawTable();
        }

        List<Control> innerctrls =
            new List<Control>();

        System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;
        public void ReDrawTable()
        {
            if (suspended>0)
                return;
           

            if (tableLayoutPanel1!=null)
                this.Controls.Remove(tableLayoutPanel1);

            this.tableLayoutPanel1 = new TableLayoutPanel();
            this.tableLayoutPanel1.ColumnCount = 1;
            this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));

            int rowcount = 0;

            foreach (Control c in innerctrls)
            {
                if (!c.Visible)
                    continue ;
                this.tableLayoutPanel1.Controls.Add(c, 0, rowcount);
                rowcount++;
            }

            float h = 100.0f / (float)rowcount;
            for (int i = 0; i < rowcount; i++)
                this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, h));

            this.tableLayoutPanel1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.tableLayoutPanel1.Name = "tableLayoutPanel1";
            this.tableLayoutPanel1.RowCount = rowcount;
            this.tableLayoutPanel1.TabIndex = 0;

            this.Controls.Add(tableLayoutPanel1);
        }
    }

---

Thank you, that's a GREAT help!

One question: how do I create a multirowpanel table of multiple columns ensuring that I can delete a particular control or a whole row on command? I tried editing your code and it turned into a huge mess :S

This should do it...

I have not actually run this but it *should* do the job it may require a few minor tweeks. Let me know how it goes

Code:

---

      int suspended = 0;
        public void SuspendTableDraw()
        {
            suspended++;
        }

        public void ResumeTableDraw()
        {
            suspended = Math.Max(0, suspended--);
            if (suspended == 0)
                ReDrawTable();
        }

        struct ControlPosition
        {
            public ControlPosition(int Row, int Column)
            {
                this.Row = Row;
                this.Column = Column;
            }

            public int Row ;
            public int Column;
        }

        public void Add(Control control, int row, int column)
        {
            if (innercontrls.ContainsKey(control))
                throw new Exception("The control already exists in the table.");
            innercontrls.Add(control, new ControlPosition(row, column));
            ReDrawTable();
        }

        public void Remove(Control c)
        {
            innercontrls.Remove(c);
            ReDrawTable();
        }

        Dictionary<Control, ControlPosition> innercontrls = new Dictionary<Control, ControlPosition>();
        System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;
        public void ReDrawTable()
        {
            if (suspended > 0)
                return;
            if (tableLayoutPanel1 != null)
                this.Controls.Remove(tableLayoutPanel1);
            this.tableLayoutPanel1 = new TableLayoutPanel();

            int rowcount=0, colcount=0;
            foreach (KeyValuePair<Control, ControlPosition> kvp in innercontrls)
            {
                rowcount = Math.Max(kvp.Value.Row + 1, rowcount);
                colcount = Math.Max(kvp.Value.Column + 1, colcount);
            }
            this.tableLayoutPanel1.ColumnCount = colcount ;
           
            float w = 100.0f / colcount;
            for (int i=0; i<colcount; i++)
                this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, w));

            foreach (KeyValuePair<Control, ControlPosition> kvp in innercontrls)
            {
                if (!kvp.Key.Visible)
                    continue;
                this.tableLayoutPanel1.Controls.Add(kvp.Key, kvp.Value.Row, kvp.Value.Column);
            }

            float h = 100.0f / (float)rowcount;
            for (int i = 0; i < rowcount; i++)
                this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, h));

            this.tableLayoutPanel1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.tableLayoutPanel1.Name = "tableLayoutPanel1";
            this.tableLayoutPanel1.RowCount = rowcount;
            this.tableLayoutPanel1.TabIndex = 0;

            this.Controls.Add(tableLayoutPanel1);

        }

---

Thanks once again. I have now been able to add many more methods to the multirowpanel class :) There is however one method I created that keeps returning a null pointer exception when i throw it:

MultiRowPanel Class:

Code:

---

public void SetBackgrColor(string value)
        {
            tableLayoutPanel1.BackColor = ColorTranslator.FromHtml(value);
        }

---

Main Program:

Code:

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      protected void InitializeFormat()
        {
            menuStripSnatcher.BackColor = ColorTranslator.FromHtml("#3A9DCB");
            gbxFormat.ForeColor = ColorTranslator.FromHtml("#3A9DCB");
            tblPnl.SetBackgrColor("#3A9DCB"); // Returns null pointer
}

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No matter, I just set it in the c# class itself :)