B-Koronfol Ответов: 2

Как изменить значение свойства для пользовательского datagridviewcomboboxcell

Hello Everybody.
I developed Multi-column ComboBox and I used the first item in it to use it as a button to add a new item to the ComboBox as needed, I named the linked property NewItemButtonCaption. Till now everything is okay, after that I used that Multi-column CoboBox to create custom DataGridView Column and I cloned the new property in the ComboBoxCell and ComboBoxColumn.

The problem is that when I create the Column in a DataGridView the NewItemButtonCaption doesn't work.


Что я уже пробовал:

namespace Custom_DataGridColumn
{
    public class MCCoboBoxCell : DataGridViewComboBoxCell
    {
        public override Type EditType => typeof(MCCBEditingControl);

        public override Type ValueType => base.ValueType;

        public MCCoboBoxCell() : base()
        {
        }

        public override void InitializeEditingControl(
            int rowIndex, object initialFormattedValue,
            DataGridViewCellStyle dataGridViewCellStyle)
        {
            base.InitializeEditingControl(
                rowIndex, initialFormattedValue, dataGridViewCellStyle);

            MCCBEditingControl ctl =
                DataGridView.EditingControl as MCCBEditingControl;

            ctl.NewButtonText = NewItemButtonCaption;
            ctl.DropDownStyle = ComboBoxStyle.DropDown;
        }

        public override object DefaultNewRowValue =>
            base.DefaultNewRowValue;

        private string _NewButtonText = string.Empty;


        [NotifyParentProperty(true)]
        public string NewItemButtonCaption
        {
            get
            {
               return _NewButtonText;
            }
            set
            {
                _NewButtonText = value;
            }
        }
 
        public override object Clone()
        {
            var clone = (MCCoboBoxCell)base.Clone();
            clone.NewItemButtonCaption = NewItemButtonCaption;

            return clone;
        }
    }
}

namespace Custom_DataGridColumn
{
    public class MultiColumnComboBox : DataGridViewComboBoxColumn
    {
        MCCoboBoxCell MCCoboBoxCell;
        public MultiColumnComboBox()
        {
            if (MCCoboBoxCell == null)
            {
                MCCoboBoxCell = new MCCoboBoxCell();
                this.CellTemplate = MCCoboBoxCell;
            }
        }

        private string _NewButtonText = string.Empty;

        [NotifyParentProperty(true)]
        public string NewItemButtonCaption
        {
            set
            {
                _NewButtonText = value;
            }
            get
            {
                return _NewButtonText;
            }
        }
       
        public override object Clone()
        {
            var clone = (MCCoboBoxCell)base.CellTemplate;
            clone.NewItemButtonCaption = NewItemButtonCaption;

            return base.Clone();
        }

    }
}
 class Form1 : Form
    {
        private DataGridView dataGridView1;
        private Custom_DataGridColumn.MultiColumnComboBox Column2;
        DataTable dataTable = new DataTable("Accounts");

        public Form1()
        {
            InitializeComponent();

            #region DataTable Info   
        }
       
        private void InitializeComponent()
        {
            this.dataGridView1 = new System.Windows.Forms.DataGridView();
            this.Column2 = new Custom_DataGridColumn.MultiColumnComboBox();
            // 
            // dataGridView1
            // 
            this.dataGridView1.ColumnHeadersHeightSizeMode = 
            this.dataGridView1.Columns.AddRange(new 
 System.Windows.Forms.DataGridViewColumn[] {
            this.Column2});
...
            // 
            // Column2
            // 
            this.Column2.HeaderText = "Column2";
            this.Column2.Name = "Column2";
            this.Column2.NewItemButtonCaption = "Add New Item";\\Not working
            // 
            // Form1
            // 
       ...

        }
    }

2 Ответов

Рейтинг:
6

B-Koronfol

Я решил его, и это полное решение:

[ToolboxItem(false)]
 public class MCCBEditingControl : MultiColumnsComboBox, IDataGridViewEditingControl
 {
     private DataGridView _DataGridView;

     public MCCBEditingControl()
     {
     }
     public DataGridView EditingControlDataGridView
     {
         get { return _DataGridView; }
         set { _DataGridView = value; }
     }

     private int rowIndex;
     public int EditingControlRowIndex
     {
         get { return rowIndex; }
         set { rowIndex = value; }
     }

     protected override void OnSelectedValueChanged(EventArgs e)
     {
         try
         {
             EditingControlValueChanged = true;
             this.EditingControlDataGridView.
                 NotifyCurrentCellDirty(true);
             base.OnSelectedValueChanged(e);
         }
         catch (Exception)
         {

             throw;
         }
     }

     public object EditingControlFormattedValue
     {
         get
         {
             if (this.SelectedIndex > 0)
             {
                 return this.Text.ToString();
             }
             else if (this.SelectedIndex == 0)
             {
                 //Show MessageBox Option to add new item
                 return string.Empty;
             }
             else
             {
                 return string.Empty;
             }
         }
         set
         {
             string newValue = value as string;
             if (newValue != null)
                 this.Text = newValue;
         }
     }

     private bool valueChanged = true;
     public bool EditingControlValueChanged
     { get => valueChanged; set => valueChanged = value; }

     public Cursor EditingPanelCursor =>
         base.Cursor;

     public bool RepositionEditingControlOnValueChange => false;


     public void ApplyCellStyleToEditingControl(
         DataGridViewCellStyle dataGridViewCellStyle)
     {
         this.Font = dataGridViewCellStyle.Font;
         this.ForeColor = dataGridViewCellStyle.ForeColor;
         this.BackColor = dataGridViewCellStyle.BackColor;
     }

     public bool EditingControlWantsInputKey(
         Keys keyData, bool dataGridViewWantsInputKey)
     {
         // Let the DateTimePicker handle the keys listed.
         switch (keyData & Keys.KeyCode)
         {
             case Keys.Left:
             case Keys.Up:
             case Keys.Down:
             case Keys.Right:
             case Keys.Home:
             case Keys.End:
             case Keys.PageDown:
             case Keys.PageUp:
             case Keys.Enter:
                 return true;
             default:
                 return false;
         }
     }

     public object GetEditingControlFormattedValue(
         DataGridViewDataErrorContexts context)
     {
         return EditingControlFormattedValue;
     }

     public void PrepareEditingControlForEdit(bool selectAll)
     {

     }

     protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
     {
         if (keyData == Keys.Tab || keyData == Keys.Enter)
         {
             this.DroppedDown = false;

             if (this.SelectedIndex == 0)
                 return true;
         }
         return base.ProcessCmdKey(ref msg, keyData);
     }


 }


public class MCCoboBoxCell : DataGridViewComboBoxCell
{
    public override Type EditType => typeof(MCCBEditingControl);

    public override Type ValueType => base.ValueType;

    public MCCoboBoxCell() : base()
    {
    }

    public override void InitializeEditingControl(
        int rowIndex, object initialFormattedValue,
        DataGridViewCellStyle dataGridViewCellStyle)
    {
        base.InitializeEditingControl(
            rowIndex, initialFormattedValue, dataGridViewCellStyle);

        MCCBEditingControl ctl=
            DataGridView.EditingControl as MCCBEditingControl;

        ctl.ShowAddNew = true;
        ctl.NewButtonText = NewItemButtonCaption;
        ctl.DropDownStyle = ComboBoxStyle.DropDown;
    }

    public override object DefaultNewRowValue =>
        base.DefaultNewRowValue;

    private string _NewButtonText ="Add New";

    public string NewItemButtonCaption
    {
        get
        {
           return _NewButtonText;
        }
        set
        {
            _NewButtonText = value;
        }
    }
    public static List<MCCoboBoxCell> mCCoboBoxCells = new List<MCCoboBoxCell>();
    public override object Clone()
    {
        var clone = (MCCoboBoxCell)base.Clone();
        clone.NewItemButtonCaption = this.NewItemButtonCaption;
        mCCoboBoxCells.Add(clone);
        return clone;
    }

}


public class MultiColumnComboBox : DataGridViewComboBoxColumn
{
    public MultiColumnComboBox()
    {
        this.CellTemplate = new MCCoboBoxCell();
    }

    private string _NewButtonText = "Add New Account";

    [NotifyParentProperty(true)]
    public string NewItemButtonCaption
    {
        set
        {
            _NewButtonText = value;
            Clone();
            foreach (MCCoboBoxCell cell in MCCoboBoxCell.mCCoboBoxCells)
            {
                cell.NewItemButtonCaption = this.NewItemButtonCaption;
            }
        }
        get
        {
            return _NewButtonText;
        }
    }
    public static List<MCCoboBoxCell> mCCoboBoxCells = new List<MCCoboBoxCell>();
    public override object Clone()
    {
        var clone = (MCCoboBoxCell)base.CellTemplate;
        clone.NewItemButtonCaption = _NewButtonText;
        mCCoboBoxCells.Add(clone);
        return base.Clone();
    }

}

Рейтинг:
0

RickZeeland

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