怎样用自定义控件编辑DataGridView(WinForm)单元格的值,比如用一个ComboBox?就是说,当单元格需要编辑时(双击翘足或者得到焦点),就把相应的编辑器(ComboBox、TextBox等)移动到该单元格上并显示出来。编辑结束(失去焦点或者又双击了别的单元格),把编辑器的值赋给相应的单元格或者底下的数据源。
哪位网友有经验,请教一下,最好能贴出代码。
谢谢!

解决方案 »

  1.   

    这个实际上不需要自己移动控件来编辑值,你只需要添加一个自定义的DataGridView的列就可以了。
    MSDN:
    开发工具和语言
      Visual Studio文档
        基于Windows的应用程序,组件和服务
          创建基于Windows的应用程序
            Window 窗体
              Window窗体入门
                Windows窗体控件
                  用于Windows窗体上的控件
                    DataGridView控件
                      自定义Window窗体DataGridView控件
                        如何:在 Windows 窗体 DataGridView 单元格中承载控件
      

  2.   

    MSDN:
    DataGridView 控件提供了多种列类型,使得用户可以通过多种方式输入和编辑值。但是,如果这些列类型无法满足数据输入要求,您也可以使用承载所选控件的单元格创建自己的列类型。要做到这一点,必须定义派生自 DataGridViewColumn 和 DataGridViewCell 的类。您还必须定义派生自 Control 并实现 IDataGridViewEditingControl 接口的类。下面的代码示例演示如何创建日历列。此列的单元格在普通的文本框单元格中显示日期,但当用户编辑单元格时,就会出现 DateTimePicker 控件。为了避免必须再次实现文本框显示功能,CalendarCell 类从 DataGridViewTextBoxCell 类派生,而不是直接从 DataGridViewCell 类继承。注意 
    当从 DataGridViewCell 或 DataGridViewColumn 派生并向派生类添加新属性时,请确保重写 Clone 方法以便在克隆操作期间复制新属性。还应调用基类的 Clone 方法,以便将基类的属性复制到新的单元格或列中。
     
    using System;
    using System.Windows.Forms;public class CalendarColumn : DataGridViewColumn
    {
        public CalendarColumn() : base(new CalendarCell())
        {
        }    public override DataGridViewCell CellTemplate
        {
            get
            {
                return base.CellTemplate;
            }
            set
            {
                // Ensure that the cell used for the template is a CalendarCell.
                if (value != null && 
                    !value.GetType().IsAssignableFrom(typeof(CalendarCell)))
                {
                    throw new InvalidCastException("Must be a CalendarCell");
                }
                base.CellTemplate = value;
            }
        }
    }public class CalendarCell : DataGridViewTextBoxCell
    {    public CalendarCell()
            : base()
        {
            // Use the short date format.
            this.Style.Format = "d";
        }    public override void InitializeEditingControl(int rowIndex, object 
            initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
        {
            // Set the value of the editing control to the current cell value.
            base.InitializeEditingControl(rowIndex, initialFormattedValue, 
                dataGridViewCellStyle);
            CalendarEditingControl ctl = 
                DataGridView.EditingControl as CalendarEditingControl;
            ctl.Value = (DateTime)this.Value;
        }    public override Type EditType
        {
            get
            {
                // Return the type of the editing contol that CalendarCell uses.
                return typeof(CalendarEditingControl);
            }
        }    public override Type ValueType
        {
            get
            {
                // Return the type of the value that CalendarCell contains.
                return typeof(DateTime);
            }
        }    public override object DefaultNewRowValue
        {
            get
            {
                // Use the current date and time as the default value.
                return DateTime.Now;
            }
        }
    }class CalendarEditingControl : DateTimePicker, IDataGridViewEditingControl
    {
        DataGridView dataGridView;
        private bool valueChanged = false;
        int rowIndex;    public CalendarEditingControl()
        {
            this.Format = DateTimePickerFormat.Short;
        }    // Implements the IDataGridViewEditingControl.EditingControlFormattedValue 
        // property.
        public object EditingControlFormattedValue
        {
            get
            {
                return this.Value.ToShortDateString();
            }
            set
            {
                String newValue = value as String;
                if (newValue != null)
                {
                    this.Value = DateTime.Parse(newValue);
                }
            }
        }    // Implements the 
        // IDataGridViewEditingControl.GetEditingControlFormattedValue method.
        public object GetEditingControlFormattedValue(
            DataGridViewDataErrorContexts context)
        {
            return EditingControlFormattedValue;
        }    // Implements the 
        // IDataGridViewEditingControl.ApplyCellStyleToEditingControl method.
        public void ApplyCellStyleToEditingControl(
            DataGridViewCellStyle dataGridViewCellStyle)
        {
            this.Font = dataGridViewCellStyle.Font;
            this.CalendarForeColor = dataGridViewCellStyle.ForeColor;
            this.CalendarMonthBackground = dataGridViewCellStyle.BackColor;
        }    // Implements the IDataGridViewEditingControl.EditingControlRowIndex 
        // property.
        public int EditingControlRowIndex
        {
            get
            {
                return rowIndex;
            }
            set
            {
                rowIndex = value;
            }
        }    // Implements the IDataGridViewEditingControl.EditingControlWantsInputKey 
        // method.
        public bool EditingControlWantsInputKey(
            Keys key, bool dataGridViewWantsInputKey)
        {
            // Let the DateTimePicker handle the keys listed.
            switch (key & 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:
                    return true;
                default:
                    return false;
            }
        }    // Implements the IDataGridViewEditingControl.PrepareEditingControlForEdit 
        // method.
        public void PrepareEditingControlForEdit(bool selectAll)
        {
            // No preparation needs to be done.
        }    // Implements the IDataGridViewEditingControl
        // .RepositionEditingControlOnValueChange property.
        public bool RepositionEditingControlOnValueChange
        {
            get
            {
                return false;
            }
        }    // Implements the IDataGridViewEditingControl
        // .EditingControlDataGridView property.
        public DataGridView EditingControlDataGridView
        {
            get
            {
                return dataGridView;
            }
            set
            {
                dataGridView = value;
            }
        }    // Implements the IDataGridViewEditingControl
        // .EditingControlValueChanged property.
        public bool EditingControlValueChanged
        {
            get
            {
                return valueChanged;
            }
            set
            {
                valueChanged = value;
            }
        }    // Implements the IDataGridViewEditingControl
        // .EditingPanelCursor property.
        public Cursor EditingPanelCursor
        {
            get
            {
                return base.Cursor;
            }
        }    protected override void OnValueChanged(EventArgs eventargs)
        {
            // Notify the DataGridView that the contents of the cell
            // have changed.
            valueChanged = true;
            this.EditingControlDataGridView.NotifyCurrentCellDirty(true);
            base.OnValueChanged(eventargs);
        }
    }public class Form1 : Form
    {
        private DataGridView dataGridView1 = new DataGridView();    [STAThreadAttribute()]
        public static void Main()
        {
            Application.Run(new Form1());
        }    public Form1()
        {
            this.dataGridView1.Dock = DockStyle.Fill;
            this.Controls.Add(this.dataGridView1);
            this.Load += new EventHandler(Form1_Load);
            this.Text = "DataGridView calendar column demo";
        }    private void Form1_Load(object sender, EventArgs e)
        {
            CalendarColumn col = new CalendarColumn();
            this.dataGridView1.Columns.Add(col);
            this.dataGridView1.RowCount = 5;
            foreach (DataGridViewRow row in this.dataGridView1.Rows)
            {
                row.Cells[0].Value = DateTime.Now;
            }
        }
    }
      

  3.   

    MSDN上就有这样的例子,难道你们都不装MSDN么??
    一般来说需要三个类来实现一种新的编辑控件(DataGridViewEditingControl),分别是EditingControl,该类继承自IDataGridViewEditingControl,即是你的自定义控件;Cell类,该类继承自DataGridViewCell由Column承载;还有一个DataGridView
    Column类用来存储列的某些正常运行需要的东东~
      

  4.   

    if (e.RowIndex >= 0 && 3 == e.ColumnIndex)
                    {
                        //cobTest 为隐藏的ComboBox控件,点击DataGridView中第三列的任意一行可进行下拉选择项,
                               如果值更改可写此控件的值更改事件,将DataGridView中其它列有下拉选项的值重新绑定或更改文本值
                        cobTest.Items.Add(""); 
                        cobTest.Visible = true;
                        cobTest.Items.Clear();
                        int tt = 0;
                        if (null != relateSwitchDevice)
                        {
                            for (int destPortIndex = 0; destPortIndex < relateSwitchDevice.destPort.Count; destPortIndex++)
                            {
                                SwitchDestPort destPort = (SwitchDestPort)relateSwitchDevice.destPort[destPortIndex];
                                if (destPort.name.Equals(dgvTally.Rows[e.RowIndex].Cells[3].Value.ToString()))
                                {
                                    tt = destPortIndex;
                                }
                                cobTest.Items.Add(destPort.name);
                            }
                            cobTest.SelectedIndex = tt;
                        }                    int height = 0;
                        for (int k = 0; k < e.RowIndex; k++)
                        {
                            if (dgvTally.Rows[k].Displayed)
                            {
                                height = height + dgvTally.Rows[k].Cells[3].OwningRow.Height;
                            }                    }
                        cobTest.Width = dgvTally.Rows[e.RowIndex].Cells[3].Size.Width;
                        cobTest.Height = dgvTally.Rows[e.RowIndex].Cells[3].Size.Height;
                        Point po = new Point((dgvTally.Location.X + dgvTally.Rows[e.RowIndex].Cells[0].OwningColumn.Width + dgvTally.Rows[e.RowIndex].Cells[1].OwningColumn.Width + dgvTally.Rows[e.RowIndex].Cells[2].OwningColumn.Width), (dgvTally.Location.Y + dgvTally.TopLeftHeaderCell.Size.Height + height));//dgvTally 为DataGridView控件
                        cobTest.Location = po;//所点击的位置
    }